зеркало из https://github.com/mozilla/gecko-dev.git
3678 строки
120 KiB
C++
3678 строки
120 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Implementation of mozilla::dom::Selection
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*/
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#include "mozilla/dom/Selection.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/AutoCopyListener.h"
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#include "mozilla/AutoRestore.h"
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#include "mozilla/ContentIterator.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/SelectionBinding.h"
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#include "mozilla/dom/ShadowRoot.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/HTMLEditor.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/RangeBoundary.h"
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#include "mozilla/RangeUtils.h"
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#include "mozilla/StaticPrefs.h"
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#include "mozilla/Telemetry.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsFrameSelection.h"
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#include "nsISelectionListener.h"
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#include "nsContentCID.h"
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#include "nsDeviceContext.h"
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#include "nsIContent.h"
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#include "nsRange.h"
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#include "nsITableCellLayout.h"
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#include "nsTArray.h"
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#include "nsTableWrapperFrame.h"
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#include "nsTableCellFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsCCUncollectableMarker.h"
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#include "nsIDocumentEncoder.h"
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#include "nsTextFragment.h"
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#include <algorithm>
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#include "nsContentUtils.h"
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#include "nsGkAtoms.h"
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#include "nsLayoutUtils.h"
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#include "nsBidiPresUtils.h"
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#include "nsTextFrame.h"
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#include "nsContentUtils.h"
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#include "nsThreadUtils.h"
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#include "nsPresContext.h"
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#include "nsCaret.h"
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#include "nsITimer.h"
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#include "mozilla/dom/Document.h"
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#include "nsINamed.h"
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#include "nsISelectionController.h" //for the enums
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#include "nsCopySupport.h"
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#include "nsIClipboard.h"
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#include "nsIFrameInlines.h"
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#include "nsRefreshDriver.h"
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#include "nsIBidiKeyboard.h"
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#include "nsError.h"
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#include "nsViewManager.h"
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#include "nsFocusManager.h"
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#include "nsPIDOMWindow.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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//#define DEBUG_TABLE 1
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static bool IsValidSelectionPoint(nsFrameSelection* aFrameSel, nsINode* aNode);
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#ifdef PRINT_RANGE
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static void printRange(nsRange* aDomRange);
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# define DEBUG_OUT_RANGE(x) printRange(x)
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#else
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# define DEBUG_OUT_RANGE(x)
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#endif // PRINT_RANGE
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/******************************************************************************
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* Utility methods defined in nsISelectionController.idl
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******************************************************************************/
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namespace mozilla {
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const char* ToChar(SelectionType aSelectionType) {
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switch (aSelectionType) {
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case SelectionType::eInvalid:
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return "SelectionType::eInvalid";
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case SelectionType::eNone:
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return "SelectionType::eNone";
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case SelectionType::eNormal:
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return "SelectionType::eNormal";
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case SelectionType::eSpellCheck:
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return "SelectionType::eSpellCheck";
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case SelectionType::eIMERawClause:
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return "SelectionType::eIMERawClause";
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case SelectionType::eIMESelectedRawClause:
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return "SelectionType::eIMESelectedRawClause";
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case SelectionType::eIMEConvertedClause:
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return "SelectionType::eIMEConvertedClause";
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case SelectionType::eIMESelectedClause:
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return "SelectionType::eIMESelectedClause";
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case SelectionType::eAccessibility:
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return "SelectionType::eAccessibility";
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case SelectionType::eFind:
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return "SelectionType::eFind";
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case SelectionType::eURLSecondary:
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return "SelectionType::eURLSecondary";
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case SelectionType::eURLStrikeout:
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return "SelectionType::eURLStrikeout";
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default:
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return "Invalid SelectionType";
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}
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}
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} // namespace mozilla
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//#define DEBUG_SELECTION // uncomment for printf describing every collapse and
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// extend. #define DEBUG_NAVIGATION
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//#define DEBUG_TABLE_SELECTION 1
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struct CachedOffsetForFrame {
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CachedOffsetForFrame()
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: mCachedFrameOffset(0, 0) // nsPoint ctor
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,
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mLastCaretFrame(nullptr),
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mLastContentOffset(0),
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mCanCacheFrameOffset(false) {}
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nsPoint mCachedFrameOffset; // cached frame offset
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nsIFrame* mLastCaretFrame; // store the frame the caret was last drawn in.
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int32_t mLastContentOffset; // store last content offset
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bool mCanCacheFrameOffset; // cached frame offset is valid?
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};
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class nsAutoScrollTimer final : public nsITimerCallback, public nsINamed {
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public:
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NS_DECL_ISUPPORTS
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nsAutoScrollTimer()
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: mFrameSelection(0),
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mSelection(0),
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mPresContext(0),
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mPoint(0, 0),
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mDelay(30) {}
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// aPoint is relative to aPresContext's root frame
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nsresult Start(nsPresContext* aPresContext, nsPoint& aPoint) {
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mPoint = aPoint;
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// Store the presentation context. The timer will be
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// stopped by the selection if the prescontext is destroyed.
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mPresContext = aPresContext;
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mContent = PresShell::GetCapturingContent();
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if (!mTimer) {
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mTimer = NS_NewTimer(
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mPresContext->Document()->EventTargetFor(TaskCategory::Other));
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if (!mTimer) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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return mTimer->InitWithCallback(this, mDelay, nsITimer::TYPE_ONE_SHOT);
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}
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nsresult Stop() {
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if (mTimer) {
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mTimer->Cancel();
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mTimer = nullptr;
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}
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mContent = nullptr;
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return NS_OK;
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}
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nsresult Init(nsFrameSelection* aFrameSelection, Selection* aSelection) {
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mFrameSelection = aFrameSelection;
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mSelection = aSelection;
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return NS_OK;
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}
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nsresult SetDelay(uint32_t aDelay) {
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mDelay = aDelay;
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return NS_OK;
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}
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MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Notify(nsITimer* timer) override {
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if (mSelection && mPresContext) {
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AutoWeakFrame frame =
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mContent ? mPresContext->GetPrimaryFrameFor(mContent) : nullptr;
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if (!frame) {
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return NS_OK;
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}
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mContent = nullptr;
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nsPoint pt = mPoint - frame->GetOffsetTo(
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mPresContext->PresShell()->GetRootFrame());
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RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
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frameSelection->HandleDrag(frame, pt);
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if (!frame.IsAlive()) {
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return NS_OK;
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}
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NS_ASSERTION(frame->PresContext() == mPresContext, "document mismatch?");
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RefPtr<Selection> selection = mSelection;
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selection->DoAutoScroll(frame, pt);
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}
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return NS_OK;
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}
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NS_IMETHOD GetName(nsACString& aName) override {
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aName.AssignLiteral("nsAutoScrollTimer");
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return NS_OK;
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}
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protected:
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virtual ~nsAutoScrollTimer() {
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if (mTimer) {
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mTimer->Cancel();
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}
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}
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private:
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nsFrameSelection* mFrameSelection;
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Selection* mSelection;
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nsPresContext* mPresContext;
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// relative to mPresContext's root frame
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nsPoint mPoint;
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nsCOMPtr<nsITimer> mTimer;
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nsCOMPtr<nsIContent> mContent;
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uint32_t mDelay;
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};
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NS_IMPL_ISUPPORTS(nsAutoScrollTimer, nsITimerCallback, nsINamed)
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/*
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The limiter is used specifically for the text areas and textfields
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In that case it is the DIV tag that is anonymously created for the text
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areas/fields. Text nodes and BR nodes fall beneath it. In the case of a
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BR node the limiter will be the parent and the offset will point before or
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after the BR node. In the case of the text node the parent content is
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the text node itself and the offset will be the exact character position.
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The offset is not important to check for validity. Simply look at the
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passed in content. If it equals the limiter then the selection point is valid.
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If its parent it the limiter then the point is also valid. In the case of
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NO limiter all points are valid since you are in a topmost iframe. (browser
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or composer)
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*/
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bool IsValidSelectionPoint(nsFrameSelection* aFrameSel, nsINode* aNode) {
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if (!aFrameSel || !aNode) return false;
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nsIContent* limiter = aFrameSel->GetLimiter();
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if (limiter && limiter != aNode && limiter != aNode->GetParent()) {
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// if newfocus == the limiter. that's ok. but if not there and not parent
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// bad
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return false; // not in the right content. tLimiter said so
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}
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limiter = aFrameSel->GetAncestorLimiter();
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return !limiter || nsContentUtils::ContentIsDescendantOf(aNode, limiter);
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}
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namespace mozilla {
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struct MOZ_RAII AutoPrepareFocusRange {
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AutoPrepareFocusRange(Selection* aSelection, bool aContinueSelection,
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bool aMultipleSelection
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM) {
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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if (aSelection->mRanges.Length() <= 1) {
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return;
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}
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if (aSelection->mFrameSelection->IsUserSelectionReason()) {
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mUserSelect.emplace(aSelection);
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}
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bool userSelection = aSelection->mUserInitiated;
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nsTArray<RangeData>& ranges = aSelection->mRanges;
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if (!userSelection || (!aContinueSelection && aMultipleSelection)) {
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// Scripted command or the user is starting a new explicit multi-range
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// selection.
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for (RangeData& entry : ranges) {
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entry.mRange->SetIsGenerated(false);
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}
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return;
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}
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int16_t reason = aSelection->mFrameSelection->mSelectionChangeReason;
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bool isAnchorRelativeOp =
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(reason & (nsISelectionListener::DRAG_REASON |
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nsISelectionListener::MOUSEDOWN_REASON |
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nsISelectionListener::MOUSEUP_REASON |
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nsISelectionListener::COLLAPSETOSTART_REASON));
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if (!isAnchorRelativeOp) {
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return;
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}
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// This operation is against the anchor but our current mAnchorFocusRange
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// represents the focus in a multi-range selection. The anchor from a user
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// perspective is the most distant generated range on the opposite side.
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// Find that range and make it the mAnchorFocusRange.
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const size_t len = ranges.Length();
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size_t newAnchorFocusIndex = size_t(-1);
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if (aSelection->GetDirection() == eDirNext) {
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for (size_t i = 0; i < len; ++i) {
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if (ranges[i].mRange->IsGenerated()) {
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newAnchorFocusIndex = i;
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break;
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}
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}
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} else {
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size_t i = len;
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while (i--) {
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if (ranges[i].mRange->IsGenerated()) {
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newAnchorFocusIndex = i;
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break;
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}
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}
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}
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if (newAnchorFocusIndex == size_t(-1)) {
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// There are no generated ranges - that's fine.
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return;
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}
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// Setup the new mAnchorFocusRange and mark the old one as generated.
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if (aSelection->mAnchorFocusRange) {
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aSelection->mAnchorFocusRange->SetIsGenerated(true);
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}
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nsRange* range = ranges[newAnchorFocusIndex].mRange;
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range->SetIsGenerated(false);
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aSelection->mAnchorFocusRange = range;
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// Remove all generated ranges (including the old mAnchorFocusRange).
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RefPtr<nsPresContext> presContext = aSelection->GetPresContext();
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size_t i = len;
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while (i--) {
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range = aSelection->mRanges[i].mRange;
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if (range->IsGenerated()) {
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range->SetSelection(nullptr);
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aSelection->SelectFrames(presContext, range, false);
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aSelection->mRanges.RemoveElementAt(i);
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}
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}
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if (aSelection->mFrameSelection) {
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aSelection->mFrameSelection->InvalidateDesiredPos();
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}
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}
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Maybe<Selection::AutoUserInitiated> mUserSelect;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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} // namespace mozilla
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#ifdef PRINT_RANGE
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void printRange(nsRange* aDomRange) {
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if (!aDomRange) {
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printf("NULL Range\n");
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}
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nsINode* startNode = aDomRange->GetStartContainer();
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nsINode* endNode = aDomRange->GetEndContainer();
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int32_t startOffset = aDomRange->StartOffset();
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int32_t endOffset = aDomRange->EndOffset();
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printf("range: 0x%lx\t start: 0x%lx %ld, \t end: 0x%lx,%ld\n",
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(unsigned long)aDomRange, (unsigned long)startNode, (long)startOffset,
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(unsigned long)endNode, (long)endOffset);
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}
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#endif /* PRINT_RANGE */
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void Selection::Stringify(nsAString& aResult, FlushFrames aFlushFrames) {
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if (aFlushFrames == FlushFrames::Yes) {
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// We need FlushType::Frames here to make sure frames have been created for
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// the selected content. Use mFrameSelection->GetPresShell() which returns
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// null if the Selection has been disconnected (the shell is Destroyed).
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RefPtr<PresShell> presShell =
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mFrameSelection ? mFrameSelection->GetPresShell() : nullptr;
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if (!presShell) {
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aResult.Truncate();
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return;
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}
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presShell->FlushPendingNotifications(FlushType::Frames);
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}
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IgnoredErrorResult rv;
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ToStringWithFormat(NS_LITERAL_STRING("text/plain"),
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nsIDocumentEncoder::SkipInvisibleContent, 0, aResult, rv);
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if (rv.Failed()) {
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aResult.Truncate();
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}
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}
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void Selection::ToStringWithFormat(const nsAString& aFormatType,
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uint32_t aFlags, int32_t aWrapCol,
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nsAString& aReturn, ErrorResult& aRv) {
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nsCOMPtr<nsIDocumentEncoder> encoder =
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do_createDocumentEncoder(NS_ConvertUTF16toUTF8(aFormatType).get());
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if (!encoder) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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PresShell* presShell = GetPresShell();
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if (!presShell) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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Document* doc = presShell->GetDocument();
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// Flags should always include OutputSelectionOnly if we're coming from here:
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aFlags |= nsIDocumentEncoder::OutputSelectionOnly;
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nsAutoString readstring;
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readstring.Assign(aFormatType);
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nsresult rv = encoder->Init(doc, readstring, aFlags);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return;
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}
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encoder->SetSelection(this);
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if (aWrapCol != 0) encoder->SetWrapColumn(aWrapCol);
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rv = encoder->EncodeToString(aReturn);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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}
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}
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void Selection::SetInterlinePosition(bool aHintRight, ErrorResult& aRv) {
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if (!mFrameSelection) {
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aRv.Throw(NS_ERROR_NOT_INITIALIZED); // Can't do selection
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return;
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}
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mFrameSelection->SetHint(aHintRight ? CARET_ASSOCIATE_AFTER
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: CARET_ASSOCIATE_BEFORE);
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}
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bool Selection::GetInterlinePosition(ErrorResult& aRv) {
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if (!mFrameSelection) {
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aRv.Throw(NS_ERROR_NOT_INITIALIZED); // Can't do selection
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return false;
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}
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return mFrameSelection->GetHint() == CARET_ASSOCIATE_AFTER;
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}
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static bool IsEditorNode(const nsINode* aNode) {
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if (!aNode) {
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return false;
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}
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if (aNode->IsEditable()) {
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return true;
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}
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auto* element = Element::FromNode(aNode);
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return element && element->State().HasState(NS_EVENT_STATE_MOZ_READWRITE);
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}
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bool Selection::IsEditorSelection() const {
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return IsEditorNode(GetFocusNode());
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}
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Nullable<int16_t> Selection::GetCaretBidiLevel(
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mozilla::ErrorResult& aRv) const {
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if (!mFrameSelection) {
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aRv.Throw(NS_ERROR_NOT_INITIALIZED);
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return Nullable<int16_t>();
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}
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nsBidiLevel caretBidiLevel = mFrameSelection->GetCaretBidiLevel();
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return (caretBidiLevel & BIDI_LEVEL_UNDEFINED)
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? Nullable<int16_t>()
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: Nullable<int16_t>(caretBidiLevel);
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}
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void Selection::SetCaretBidiLevel(const Nullable<int16_t>& aCaretBidiLevel,
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mozilla::ErrorResult& aRv) {
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if (!mFrameSelection) {
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aRv.Throw(NS_ERROR_NOT_INITIALIZED);
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return;
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}
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if (aCaretBidiLevel.IsNull()) {
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mFrameSelection->UndefineCaretBidiLevel();
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} else {
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mFrameSelection->SetCaretBidiLevel(aCaretBidiLevel.Value());
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}
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}
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nsresult Selection::GetTableCellLocationFromRange(
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nsRange* aRange, TableSelection* aSelectionType, int32_t* aRow,
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int32_t* aCol) {
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if (!aRange || !aSelectionType || !aRow || !aCol)
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return NS_ERROR_NULL_POINTER;
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*aSelectionType = TableSelection::None;
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*aRow = 0;
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*aCol = 0;
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// Must have access to frame selection to get cell info
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|
if (!mFrameSelection) return NS_OK;
|
|
|
|
nsresult result = GetTableSelectionType(aRange, aSelectionType);
|
|
if (NS_FAILED(result)) return result;
|
|
|
|
// Don't fail if range does not point to a single table cell,
|
|
// let aSelectionType tell user if we don't have a cell
|
|
if (*aSelectionType != TableSelection::Cell) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Get the child content (the cell) pointed to by starting node of range
|
|
// We do minimal checking since GetTableSelectionType assures
|
|
// us that this really is a table cell
|
|
nsCOMPtr<nsIContent> child = aRange->GetChildAtStartOffset();
|
|
if (!child) return NS_ERROR_FAILURE;
|
|
|
|
// GetCellLayout depends on current frame, we need flush frame to get
|
|
// nsITableCellLayout
|
|
if (RefPtr<PresShell> presShell = mFrameSelection->GetPresShell()) {
|
|
presShell->FlushPendingNotifications(FlushType::Frames);
|
|
|
|
// Since calling FlushPendingNotifications, so check whether disconnected.
|
|
if (!mFrameSelection || !mFrameSelection->GetPresShell()) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Note: This is a non-ref-counted pointer to the frame
|
|
nsITableCellLayout* cellLayout = mFrameSelection->GetCellLayout(child);
|
|
if (!cellLayout) return NS_ERROR_FAILURE;
|
|
|
|
return cellLayout->GetCellIndexes(*aRow, *aCol);
|
|
}
|
|
|
|
nsresult Selection::AddTableCellRange(nsRange* aRange, bool* aDidAddRange,
|
|
int32_t* aOutIndex) {
|
|
if (!aDidAddRange || !aOutIndex) return NS_ERROR_NULL_POINTER;
|
|
|
|
*aDidAddRange = false;
|
|
*aOutIndex = -1;
|
|
|
|
if (!mFrameSelection) return NS_OK;
|
|
|
|
if (!aRange) return NS_ERROR_NULL_POINTER;
|
|
|
|
nsresult result;
|
|
|
|
// Get if we are adding a cell selection and the row, col of cell if we are
|
|
int32_t newRow, newCol;
|
|
TableSelection tableMode;
|
|
result = GetTableCellLocationFromRange(aRange, &tableMode, &newRow, &newCol);
|
|
if (NS_FAILED(result)) return result;
|
|
|
|
// If not adding a cell range, we are done here
|
|
if (tableMode != TableSelection::Cell) {
|
|
mFrameSelection->mSelectingTableCellMode = tableMode;
|
|
// Don't fail if range isn't a selected cell, aDidAddRange tells caller if
|
|
// we didn't proceed
|
|
return NS_OK;
|
|
}
|
|
|
|
// Set frame selection mode only if not already set to a table mode
|
|
// so we don't lose the select row and column flags (not detected by
|
|
// getTableCellLocation)
|
|
if (mFrameSelection->mSelectingTableCellMode == TableSelection::None)
|
|
mFrameSelection->mSelectingTableCellMode = tableMode;
|
|
|
|
*aDidAddRange = true;
|
|
return AddItem(aRange, aOutIndex);
|
|
}
|
|
|
|
// TODO: Figure out TableSelection::Column and TableSelection::AllCells
|
|
nsresult Selection::GetTableSelectionType(nsRange* aRange,
|
|
TableSelection* aTableSelectionType) {
|
|
if (!aRange || !aTableSelectionType) return NS_ERROR_NULL_POINTER;
|
|
|
|
*aTableSelectionType = TableSelection::None;
|
|
|
|
// Must have access to frame selection to get cell info
|
|
if (!mFrameSelection) return NS_OK;
|
|
|
|
nsINode* startNode = aRange->GetStartContainer();
|
|
if (!startNode) return NS_ERROR_FAILURE;
|
|
|
|
nsINode* endNode = aRange->GetEndContainer();
|
|
if (!endNode) return NS_ERROR_FAILURE;
|
|
|
|
// Not a single selected node
|
|
if (startNode != endNode) return NS_OK;
|
|
|
|
nsIContent* child = aRange->GetChildAtStartOffset();
|
|
|
|
// Not a single selected node
|
|
if (!child || child->GetNextSibling() != aRange->GetChildAtEndOffset()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIContent* startContent = static_cast<nsIContent*>(startNode);
|
|
if (!(startNode->IsElement() && startContent->IsHTMLElement())) {
|
|
// Implies a check for being an element; if we ever make this work
|
|
// for non-HTML, need to keep checking for elements.
|
|
return NS_OK;
|
|
}
|
|
|
|
if (startContent->IsHTMLElement(nsGkAtoms::tr)) {
|
|
*aTableSelectionType = TableSelection::Cell;
|
|
} else // check to see if we are selecting a table or row (column and all
|
|
// cells not done yet)
|
|
{
|
|
if (child->IsHTMLElement(nsGkAtoms::table))
|
|
*aTableSelectionType = TableSelection::Table;
|
|
else if (child->IsHTMLElement(nsGkAtoms::tr))
|
|
*aTableSelectionType = TableSelection::Row;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
Selection::Selection()
|
|
: mCachedOffsetForFrame(nullptr),
|
|
mDirection(eDirNext),
|
|
mSelectionType(SelectionType::eNormal),
|
|
mCustomColors(nullptr),
|
|
mSelectionChangeBlockerCount(0),
|
|
mUserInitiated(false),
|
|
mCalledByJS(false),
|
|
mNotifyAutoCopy(false) {}
|
|
|
|
Selection::Selection(nsFrameSelection* aList)
|
|
: mFrameSelection(aList),
|
|
mCachedOffsetForFrame(nullptr),
|
|
mDirection(eDirNext),
|
|
mSelectionType(SelectionType::eNormal),
|
|
mCustomColors(nullptr),
|
|
mSelectionChangeBlockerCount(0),
|
|
mUserInitiated(false),
|
|
mCalledByJS(false),
|
|
mNotifyAutoCopy(false) {}
|
|
|
|
Selection::~Selection() { Disconnect(); }
|
|
|
|
void Selection::Disconnect() {
|
|
SetAnchorFocusRange(-1);
|
|
|
|
uint32_t count = mRanges.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
mRanges[i].mRange->SetSelection(nullptr);
|
|
}
|
|
|
|
if (mAutoScrollTimer) {
|
|
mAutoScrollTimer->Stop();
|
|
mAutoScrollTimer = nullptr;
|
|
}
|
|
|
|
mScrollEvent.Revoke();
|
|
|
|
if (mCachedOffsetForFrame) {
|
|
delete mCachedOffsetForFrame;
|
|
mCachedOffsetForFrame = nullptr;
|
|
}
|
|
}
|
|
|
|
Document* Selection::GetParentObject() const {
|
|
PresShell* presShell = GetPresShell();
|
|
return presShell ? presShell->GetDocument() : nullptr;
|
|
}
|
|
|
|
DocGroup* Selection::GetDocGroup() const {
|
|
PresShell* presShell = GetPresShell();
|
|
if (!presShell) {
|
|
return nullptr;
|
|
}
|
|
Document* doc = presShell->GetDocument();
|
|
return doc ? doc->GetDocGroup() : nullptr;
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(Selection)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Selection)
|
|
// Unlink the selection listeners *before* we do RemoveAllRanges since
|
|
// we don't want to notify the listeners during JS GC (they could be
|
|
// in JS!).
|
|
tmp->mNotifyAutoCopy = false;
|
|
tmp->StopNotifyingAccessibleCaretEventHub();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSelectionChangeEventDispatcher)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSelectionListeners)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCachedRange)
|
|
tmp->RemoveAllRanges(IgnoreErrors());
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mFrameSelection)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Selection)
|
|
{
|
|
uint32_t i, count = tmp->mRanges.Length();
|
|
for (i = 0; i < count; ++i) {
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRanges[i].mRange)
|
|
}
|
|
}
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAnchorFocusRange)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCachedRange)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFrameSelection)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelectionChangeEventDispatcher)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelectionListeners)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Selection)
|
|
|
|
// QueryInterface implementation for Selection
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Selection)
|
|
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
|
|
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
|
|
NS_INTERFACE_MAP_ENTRY(nsISupports)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
NS_IMPL_MAIN_THREAD_ONLY_CYCLE_COLLECTING_ADDREF(Selection)
|
|
NS_IMPL_MAIN_THREAD_ONLY_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(
|
|
Selection, Disconnect())
|
|
|
|
const RangeBoundary& Selection::AnchorRef() const {
|
|
if (!mAnchorFocusRange) {
|
|
static RangeBoundary sEmpty;
|
|
return sEmpty;
|
|
}
|
|
|
|
if (GetDirection() == eDirNext) {
|
|
return mAnchorFocusRange->StartRef();
|
|
}
|
|
|
|
return mAnchorFocusRange->EndRef();
|
|
}
|
|
|
|
const RangeBoundary& Selection::FocusRef() const {
|
|
if (!mAnchorFocusRange) {
|
|
static RangeBoundary sEmpty;
|
|
return sEmpty;
|
|
}
|
|
|
|
if (GetDirection() == eDirNext) {
|
|
return mAnchorFocusRange->EndRef();
|
|
}
|
|
|
|
return mAnchorFocusRange->StartRef();
|
|
}
|
|
|
|
void Selection::SetAnchorFocusRange(int32_t indx) {
|
|
if (indx >= (int32_t)mRanges.Length()) return;
|
|
if (indx < 0) // release all
|
|
{
|
|
mAnchorFocusRange = nullptr;
|
|
} else {
|
|
mAnchorFocusRange = mRanges[indx].mRange;
|
|
}
|
|
}
|
|
|
|
static nsresult CompareToRangeStart(nsINode* aCompareNode,
|
|
int32_t aCompareOffset, nsRange* aRange,
|
|
int32_t* aCmp) {
|
|
nsINode* start = aRange->GetStartContainer();
|
|
NS_ENSURE_STATE(aCompareNode && start);
|
|
// If the nodes that we're comparing are not in the same document or in the
|
|
// same subtree, assume that aCompareNode will fall at the end of the ranges.
|
|
if (aCompareNode->GetComposedDoc() != start->GetComposedDoc() ||
|
|
!start->GetComposedDoc() ||
|
|
aCompareNode->SubtreeRoot() != start->SubtreeRoot()) {
|
|
*aCmp = 1;
|
|
} else {
|
|
*aCmp = nsContentUtils::ComparePoints(aCompareNode, aCompareOffset, start,
|
|
aRange->StartOffset());
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsresult CompareToRangeEnd(nsINode* aCompareNode, int32_t aCompareOffset,
|
|
nsRange* aRange, int32_t* aCmp) {
|
|
nsINode* end = aRange->GetEndContainer();
|
|
NS_ENSURE_STATE(aCompareNode && end);
|
|
// If the nodes that we're comparing are not in the same document or in the
|
|
// same subtree, assume that aCompareNode will fall at the end of the ranges.
|
|
if (aCompareNode->GetComposedDoc() != end->GetComposedDoc() ||
|
|
!end->GetComposedDoc() ||
|
|
aCompareNode->SubtreeRoot() != end->SubtreeRoot()) {
|
|
*aCmp = 1;
|
|
} else {
|
|
*aCmp = nsContentUtils::ComparePoints(aCompareNode, aCompareOffset, end,
|
|
aRange->EndOffset());
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Selection::FindInsertionPoint
|
|
//
|
|
// Binary searches the given sorted array of ranges for the insertion point
|
|
// for the given node/offset. The given comparator is used, and the index
|
|
// where the point should appear in the array is placed in *aInsertionPoint.
|
|
//
|
|
// If there is an item in the array equal to the input point, we will return
|
|
// the index of this item.
|
|
|
|
nsresult Selection::FindInsertionPoint(
|
|
nsTArray<RangeData>* aElementArray, nsINode* aPointNode,
|
|
int32_t aPointOffset,
|
|
nsresult (*aComparator)(nsINode*, int32_t, nsRange*, int32_t*),
|
|
int32_t* aPoint) {
|
|
*aPoint = 0;
|
|
int32_t beginSearch = 0;
|
|
int32_t endSearch = aElementArray->Length(); // one beyond what to check
|
|
|
|
if (endSearch) {
|
|
int32_t center = endSearch - 1; // Check last index, then binary search
|
|
do {
|
|
nsRange* range = (*aElementArray)[center].mRange;
|
|
|
|
int32_t cmp;
|
|
nsresult rv = aComparator(aPointNode, aPointOffset, range, &cmp);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (cmp < 0) { // point < cur
|
|
endSearch = center;
|
|
} else if (cmp > 0) { // point > cur
|
|
beginSearch = center + 1;
|
|
} else { // found match, done
|
|
beginSearch = center;
|
|
break;
|
|
}
|
|
center = (endSearch - beginSearch) / 2 + beginSearch;
|
|
} while (endSearch - beginSearch > 0);
|
|
}
|
|
|
|
*aPoint = beginSearch;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Selection::SubtractRange
|
|
//
|
|
// A helper function that subtracts aSubtract from aRange, and adds
|
|
// 1 or 2 RangeData objects representing the remaining non-overlapping
|
|
// difference to aOutput. It is assumed that the caller has checked that
|
|
// aRange and aSubtract do indeed overlap
|
|
|
|
nsresult Selection::SubtractRange(RangeData* aRange, nsRange* aSubtract,
|
|
nsTArray<RangeData>* aOutput) {
|
|
nsRange* range = aRange->mRange;
|
|
|
|
// First we want to compare to the range start
|
|
int32_t cmp;
|
|
nsresult rv = CompareToRangeStart(range->GetStartContainer(),
|
|
range->StartOffset(), aSubtract, &cmp);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Also, make a comparison to the range end
|
|
int32_t cmp2;
|
|
rv = CompareToRangeEnd(range->GetEndContainer(), range->EndOffset(),
|
|
aSubtract, &cmp2);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// If the existing range left overlaps the new range (aSubtract) then
|
|
// cmp < 0, and cmp2 < 0
|
|
// If it right overlaps the new range then cmp > 0 and cmp2 > 0
|
|
// If it fully contains the new range, then cmp < 0 and cmp2 > 0
|
|
|
|
if (cmp2 > 0) {
|
|
// We need to add a new RangeData to the output, running from
|
|
// the end of aSubtract to the end of range
|
|
RefPtr<nsRange> postOverlap = new nsRange(aSubtract->GetEndContainer());
|
|
rv = postOverlap->SetStartAndEnd(
|
|
aSubtract->GetEndContainer(), aSubtract->EndOffset(),
|
|
range->GetEndContainer(), range->EndOffset());
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
if (!postOverlap->Collapsed()) {
|
|
if (!aOutput->InsertElementAt(0, RangeData(postOverlap)))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
(*aOutput)[0].mTextRangeStyle = aRange->mTextRangeStyle;
|
|
}
|
|
}
|
|
|
|
if (cmp < 0) {
|
|
// We need to add a new RangeData to the output, running from
|
|
// the start of the range to the start of aSubtract
|
|
RefPtr<nsRange> preOverlap = new nsRange(range->GetStartContainer());
|
|
rv = preOverlap->SetStartAndEnd(
|
|
range->GetStartContainer(), range->StartOffset(),
|
|
aSubtract->GetStartContainer(), aSubtract->StartOffset());
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
if (!preOverlap->Collapsed()) {
|
|
if (!aOutput->InsertElementAt(0, RangeData(preOverlap)))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
(*aOutput)[0].mTextRangeStyle = aRange->mTextRangeStyle;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::UserSelectRangesToAdd(nsRange* aItem,
|
|
nsTArray<RefPtr<nsRange>>& aRangesToAdd) {
|
|
// We cannot directly call IsEditorSelection() because we may be in an
|
|
// inconsistent state during Collapse() (we're cleared already but we haven't
|
|
// got a new focus node yet).
|
|
if (IsEditorNode(aItem->GetStartContainer()) &&
|
|
IsEditorNode(aItem->GetEndContainer())) {
|
|
// Don't mess with the selection ranges for editing, editor doesn't really
|
|
// deal well with multi-range selections.
|
|
aRangesToAdd.AppendElement(aItem);
|
|
} else {
|
|
aItem->ExcludeNonSelectableNodes(&aRangesToAdd);
|
|
}
|
|
}
|
|
|
|
nsresult Selection::AddItem(nsRange* aItem, int32_t* aOutIndex,
|
|
bool aNoStartSelect) {
|
|
if (!aItem) return NS_ERROR_NULL_POINTER;
|
|
if (!aItem->IsPositioned()) return NS_ERROR_UNEXPECTED;
|
|
|
|
NS_ASSERTION(aOutIndex, "aOutIndex can't be null");
|
|
|
|
if (mUserInitiated) {
|
|
AutoTArray<RefPtr<nsRange>, 4> rangesToAdd;
|
|
*aOutIndex = int32_t(mRanges.Length()) - 1;
|
|
|
|
Document* doc = GetParentObject();
|
|
bool selectEventsEnabled =
|
|
StaticPrefs::dom_select_events_enabled() ||
|
|
(doc && nsContentUtils::IsSystemPrincipal(doc->NodePrincipal()));
|
|
|
|
if (!aNoStartSelect && mSelectionType == SelectionType::eNormal &&
|
|
selectEventsEnabled && IsCollapsed() &&
|
|
!IsBlockingSelectionChangeEvents()) {
|
|
// First, we generate the ranges to add with a scratch range, which is a
|
|
// clone of the original range passed in. We do this seperately, because
|
|
// the selectstart event could have caused the world to change, and
|
|
// required ranges to be re-generated
|
|
RefPtr<nsRange> scratchRange = aItem->CloneRange();
|
|
UserSelectRangesToAdd(scratchRange, rangesToAdd);
|
|
bool newRangesNonEmpty =
|
|
rangesToAdd.Length() > 1 ||
|
|
(rangesToAdd.Length() == 1 && !rangesToAdd[0]->Collapsed());
|
|
|
|
MOZ_ASSERT(!newRangesNonEmpty || nsContentUtils::IsSafeToRunScript());
|
|
if (newRangesNonEmpty && nsContentUtils::IsSafeToRunScript()) {
|
|
// We consider a selection to be starting if we are currently collapsed,
|
|
// and the selection is becoming uncollapsed, and this is caused by a
|
|
// user initiated event.
|
|
bool defaultAction = true;
|
|
|
|
// The spec currently doesn't say that we should dispatch this event
|
|
// on text controls, so for now we only support doing that under a
|
|
// pref, disabled by default.
|
|
// See https://github.com/w3c/selection-api/issues/53.
|
|
bool dispatchEvent = true;
|
|
nsCOMPtr<nsINode> target = aItem->GetStartContainer();
|
|
if (nsFrameSelection::sSelectionEventsOnTextControlsEnabled) {
|
|
// Get the first element which isn't in a native anonymous subtree
|
|
while (target && target->IsInNativeAnonymousSubtree()) {
|
|
target = target->GetParent();
|
|
}
|
|
} else {
|
|
if (target->IsInNativeAnonymousSubtree()) {
|
|
// This is a selection under a text control, so don't dispatch the
|
|
// event.
|
|
dispatchEvent = false;
|
|
}
|
|
}
|
|
|
|
if (dispatchEvent) {
|
|
nsContentUtils::DispatchTrustedEvent(
|
|
GetParentObject(), target, NS_LITERAL_STRING("selectstart"),
|
|
CanBubble::eYes, Cancelable::eYes, &defaultAction);
|
|
|
|
if (!defaultAction) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// As we just dispatched an event to the DOM, something could have
|
|
// changed under our feet. Re-generate the rangesToAdd array, and
|
|
// ensure that the range we are about to add is still valid.
|
|
if (!aItem->IsPositioned()) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
}
|
|
}
|
|
|
|
// The scratch ranges we generated may be invalid now, throw them out
|
|
rangesToAdd.ClearAndRetainStorage();
|
|
}
|
|
|
|
// Generate the ranges to add
|
|
UserSelectRangesToAdd(aItem, rangesToAdd);
|
|
size_t newAnchorFocusIndex =
|
|
GetDirection() == eDirPrevious ? 0 : rangesToAdd.Length() - 1;
|
|
for (size_t i = 0; i < rangesToAdd.Length(); ++i) {
|
|
int32_t index;
|
|
nsresult rv = AddItemInternal(rangesToAdd[i], &index);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (i == newAnchorFocusIndex) {
|
|
*aOutIndex = index;
|
|
rangesToAdd[i]->SetIsGenerated(false);
|
|
} else {
|
|
rangesToAdd[i]->SetIsGenerated(true);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
return AddItemInternal(aItem, aOutIndex);
|
|
}
|
|
|
|
nsresult Selection::AddItemInternal(nsRange* aItem, int32_t* aOutIndex) {
|
|
MOZ_ASSERT(aItem);
|
|
MOZ_ASSERT(aItem->IsPositioned());
|
|
MOZ_ASSERT(aOutIndex);
|
|
|
|
*aOutIndex = -1;
|
|
|
|
// a common case is that we have no ranges yet
|
|
if (mRanges.Length() == 0) {
|
|
if (!mRanges.AppendElement(RangeData(aItem))) return NS_ERROR_OUT_OF_MEMORY;
|
|
aItem->SetSelection(this);
|
|
|
|
*aOutIndex = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
int32_t startIndex, endIndex;
|
|
nsresult rv =
|
|
GetIndicesForInterval(aItem->GetStartContainer(), aItem->StartOffset(),
|
|
aItem->GetEndContainer(), aItem->EndOffset(), false,
|
|
&startIndex, &endIndex);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (endIndex == -1) {
|
|
// All ranges start after the given range. We can insert our range at
|
|
// position 0, knowing there are no overlaps (handled below)
|
|
startIndex = 0;
|
|
endIndex = 0;
|
|
} else if (startIndex == -1) {
|
|
// All ranges end before the given range. We can insert our range at
|
|
// the end of the array, knowing there are no overlaps (handled below)
|
|
startIndex = mRanges.Length();
|
|
endIndex = startIndex;
|
|
}
|
|
|
|
// If the range is already contained in mRanges, silently succeed
|
|
bool sameRange = EqualsRangeAtPoint(
|
|
aItem->GetStartContainer(), aItem->StartOffset(),
|
|
aItem->GetEndContainer(), aItem->EndOffset(), startIndex);
|
|
if (sameRange) {
|
|
*aOutIndex = startIndex;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (startIndex == endIndex) {
|
|
// The new range doesn't overlap any existing ranges
|
|
if (!mRanges.InsertElementAt(startIndex, RangeData(aItem)))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
aItem->SetSelection(this);
|
|
*aOutIndex = startIndex;
|
|
return NS_OK;
|
|
}
|
|
|
|
// We now know that at least 1 existing range overlaps with the range that
|
|
// we are trying to add. In fact, the only ranges of interest are those at
|
|
// the two end points, startIndex and endIndex - 1 (which may point to the
|
|
// same range) as these may partially overlap the new range. Any ranges
|
|
// between these indices are fully overlapped by the new range, and so can be
|
|
// removed
|
|
nsTArray<RangeData> overlaps;
|
|
if (!overlaps.InsertElementAt(0, mRanges[startIndex]))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
if (endIndex - 1 != startIndex) {
|
|
if (!overlaps.InsertElementAt(1, mRanges[endIndex - 1]))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
// Remove all the overlapping ranges
|
|
for (int32_t i = startIndex; i < endIndex; ++i) {
|
|
mRanges[i].mRange->SetSelection(nullptr);
|
|
}
|
|
mRanges.RemoveElementsAt(startIndex, endIndex - startIndex);
|
|
|
|
nsTArray<RangeData> temp;
|
|
for (int32_t i = overlaps.Length() - 1; i >= 0; i--) {
|
|
nsresult rv = SubtractRange(&overlaps[i], aItem, &temp);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
// Insert the new element into our "leftovers" array
|
|
int32_t insertionPoint;
|
|
rv = FindInsertionPoint(&temp, aItem->GetStartContainer(),
|
|
aItem->StartOffset(), CompareToRangeStart,
|
|
&insertionPoint);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (!temp.InsertElementAt(insertionPoint, RangeData(aItem)))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
// Merge the leftovers back in to mRanges
|
|
if (!mRanges.InsertElementsAt(startIndex, temp))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
for (uint32_t i = 0; i < temp.Length(); ++i) {
|
|
temp[i].mRange->SetSelection(this);
|
|
}
|
|
|
|
*aOutIndex = startIndex + insertionPoint;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult Selection::RemoveItem(nsRange* aItem) {
|
|
if (!aItem) return NS_ERROR_NULL_POINTER;
|
|
|
|
// Find the range's index & remove it. We could use FindInsertionPoint to
|
|
// get O(log n) time, but that requires many expensive DOM comparisons.
|
|
// For even several thousand items, this is probably faster because the
|
|
// comparisons are so fast.
|
|
int32_t idx = -1;
|
|
uint32_t i;
|
|
for (i = 0; i < mRanges.Length(); i++) {
|
|
if (mRanges[i].mRange == aItem) {
|
|
idx = (int32_t)i;
|
|
break;
|
|
}
|
|
}
|
|
if (idx < 0) return NS_ERROR_DOM_NOT_FOUND_ERR;
|
|
|
|
mRanges.RemoveElementAt(idx);
|
|
aItem->SetSelection(nullptr);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult Selection::RemoveCollapsedRanges() {
|
|
uint32_t i = 0;
|
|
while (i < mRanges.Length()) {
|
|
if (mRanges[i].mRange->Collapsed()) {
|
|
nsresult rv = RemoveItem(mRanges[i].mRange);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
++i;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult Selection::Clear(nsPresContext* aPresContext) {
|
|
SetAnchorFocusRange(-1);
|
|
|
|
for (uint32_t i = 0; i < mRanges.Length(); ++i) {
|
|
mRanges[i].mRange->SetSelection(nullptr);
|
|
SelectFrames(aPresContext, mRanges[i].mRange, false);
|
|
}
|
|
mRanges.Clear();
|
|
|
|
// Reset direction so for more dependable table selection range handling
|
|
SetDirection(eDirNext);
|
|
|
|
// If this was an ATTENTION selection, change it back to normal now
|
|
if (mFrameSelection && mFrameSelection->GetDisplaySelection() ==
|
|
nsISelectionController::SELECTION_ATTENTION) {
|
|
mFrameSelection->SetDisplaySelection(nsISelectionController::SELECTION_ON);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// RangeMatches*Point
|
|
//
|
|
// Compares the range beginning or ending point, and returns true if it
|
|
// exactly matches the given DOM point.
|
|
|
|
static inline bool RangeMatchesBeginPoint(nsRange* aRange, nsINode* aNode,
|
|
int32_t aOffset) {
|
|
return aRange->GetStartContainer() == aNode &&
|
|
static_cast<int32_t>(aRange->StartOffset()) == aOffset;
|
|
}
|
|
|
|
static inline bool RangeMatchesEndPoint(nsRange* aRange, nsINode* aNode,
|
|
int32_t aOffset) {
|
|
return aRange->GetEndContainer() == aNode &&
|
|
static_cast<int32_t>(aRange->EndOffset()) == aOffset;
|
|
}
|
|
|
|
// Selection::EqualsRangeAtPoint
|
|
//
|
|
// Utility method for checking equivalence of two ranges.
|
|
|
|
bool Selection::EqualsRangeAtPoint(nsINode* aBeginNode, int32_t aBeginOffset,
|
|
nsINode* aEndNode, int32_t aEndOffset,
|
|
int32_t aRangeIndex) {
|
|
if (aRangeIndex >= 0 && aRangeIndex < (int32_t)mRanges.Length()) {
|
|
nsRange* range = mRanges[aRangeIndex].mRange;
|
|
if (RangeMatchesBeginPoint(range, aBeginNode, aBeginOffset) &&
|
|
RangeMatchesEndPoint(range, aEndNode, aEndOffset))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void Selection::GetRangesForInterval(nsINode& aBeginNode, int32_t aBeginOffset,
|
|
nsINode& aEndNode, int32_t aEndOffset,
|
|
bool aAllowAdjacent,
|
|
nsTArray<RefPtr<nsRange>>& aReturn,
|
|
mozilla::ErrorResult& aRv) {
|
|
nsTArray<nsRange*> results;
|
|
nsresult rv = GetRangesForIntervalArray(&aBeginNode, aBeginOffset, &aEndNode,
|
|
aEndOffset, aAllowAdjacent, &results);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
return;
|
|
}
|
|
|
|
aReturn.SetLength(results.Length());
|
|
for (uint32_t i = 0; i < results.Length(); ++i) {
|
|
aReturn[i] = results[i]; // AddRefs
|
|
}
|
|
}
|
|
|
|
nsresult Selection::GetRangesForIntervalArray(
|
|
nsINode* aBeginNode, int32_t aBeginOffset, nsINode* aEndNode,
|
|
int32_t aEndOffset, bool aAllowAdjacent, nsTArray<nsRange*>* aRanges) {
|
|
aRanges->Clear();
|
|
int32_t startIndex, endIndex;
|
|
nsresult res =
|
|
GetIndicesForInterval(aBeginNode, aBeginOffset, aEndNode, aEndOffset,
|
|
aAllowAdjacent, &startIndex, &endIndex);
|
|
NS_ENSURE_SUCCESS(res, res);
|
|
|
|
if (startIndex == -1 || endIndex == -1) return NS_OK;
|
|
|
|
for (int32_t i = startIndex; i < endIndex; i++) {
|
|
if (!aRanges->AppendElement(mRanges[i].mRange))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// Selection::GetIndicesForInterval
|
|
//
|
|
// Works on the same principle as GetRangesForIntervalArray above, however
|
|
// instead this returns the indices into mRanges between which the
|
|
// overlapping ranges lie.
|
|
|
|
nsresult Selection::GetIndicesForInterval(nsINode* aBeginNode,
|
|
int32_t aBeginOffset,
|
|
nsINode* aEndNode, int32_t aEndOffset,
|
|
bool aAllowAdjacent,
|
|
int32_t* aStartIndex,
|
|
int32_t* aEndIndex) {
|
|
int32_t startIndex;
|
|
int32_t endIndex;
|
|
|
|
if (!aStartIndex) aStartIndex = &startIndex;
|
|
if (!aEndIndex) aEndIndex = &endIndex;
|
|
|
|
*aStartIndex = -1;
|
|
*aEndIndex = -1;
|
|
|
|
if (mRanges.Length() == 0) return NS_OK;
|
|
|
|
bool intervalIsCollapsed =
|
|
aBeginNode == aEndNode && aBeginOffset == aEndOffset;
|
|
|
|
// Ranges that end before the given interval and begin after the given
|
|
// interval can be discarded
|
|
int32_t endsBeforeIndex;
|
|
if (NS_FAILED(FindInsertionPoint(&mRanges, aEndNode, aEndOffset,
|
|
&CompareToRangeStart, &endsBeforeIndex))) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (endsBeforeIndex == 0) {
|
|
nsRange* endRange = mRanges[endsBeforeIndex].mRange;
|
|
|
|
// If the interval is strictly before the range at index 0, we can optimize
|
|
// by returning now - all ranges start after the given interval
|
|
if (!RangeMatchesBeginPoint(endRange, aEndNode, aEndOffset)) return NS_OK;
|
|
|
|
// We now know that the start point of mRanges[0].mRange equals the end of
|
|
// the interval. Thus, when aAllowadjacent is true, the caller is always
|
|
// interested in this range. However, when excluding adjacencies, we must
|
|
// remember to include the range when both it and the given interval are
|
|
// collapsed to the same point
|
|
if (!aAllowAdjacent && !(endRange->Collapsed() && intervalIsCollapsed))
|
|
return NS_OK;
|
|
}
|
|
*aEndIndex = endsBeforeIndex;
|
|
|
|
int32_t beginsAfterIndex;
|
|
if (NS_FAILED(FindInsertionPoint(&mRanges, aBeginNode, aBeginOffset,
|
|
&CompareToRangeEnd, &beginsAfterIndex))) {
|
|
return NS_OK;
|
|
}
|
|
if (beginsAfterIndex == (int32_t)mRanges.Length())
|
|
return NS_OK; // optimization: all ranges are strictly before us
|
|
|
|
if (aAllowAdjacent) {
|
|
// At this point, one of the following holds:
|
|
// endsBeforeIndex == mRanges.Length(),
|
|
// endsBeforeIndex points to a range whose start point does not equal the
|
|
// given interval's start point
|
|
// endsBeforeIndex points to a range whose start point equals the given
|
|
// interval's start point
|
|
// In the final case, there can be two such ranges, a collapsed range, and
|
|
// an adjacent range (they will appear in mRanges in that order). For this
|
|
// final case, we need to increment endsBeforeIndex, until one of the
|
|
// first two possibilites hold
|
|
while (endsBeforeIndex < (int32_t)mRanges.Length()) {
|
|
nsRange* endRange = mRanges[endsBeforeIndex].mRange;
|
|
if (!RangeMatchesBeginPoint(endRange, aEndNode, aEndOffset)) break;
|
|
endsBeforeIndex++;
|
|
}
|
|
|
|
// Likewise, one of the following holds:
|
|
// beginsAfterIndex == 0,
|
|
// beginsAfterIndex points to a range whose end point does not equal
|
|
// the given interval's end point
|
|
// beginsOnOrAfter points to a range whose end point equals the given
|
|
// interval's end point
|
|
// In the final case, there can be two such ranges, an adjacent range, and
|
|
// a collapsed range (they will appear in mRanges in that order). For this
|
|
// final case, we only need to take action if both those ranges exist, and
|
|
// we are pointing to the collapsed range - we need to point to the
|
|
// adjacent range
|
|
nsRange* beginRange = mRanges[beginsAfterIndex].mRange;
|
|
if (beginsAfterIndex > 0 && beginRange->Collapsed() &&
|
|
RangeMatchesEndPoint(beginRange, aBeginNode, aBeginOffset)) {
|
|
beginRange = mRanges[beginsAfterIndex - 1].mRange;
|
|
if (RangeMatchesEndPoint(beginRange, aBeginNode, aBeginOffset))
|
|
beginsAfterIndex--;
|
|
}
|
|
} else {
|
|
// See above for the possibilities at this point. The only case where we
|
|
// need to take action is when the range at beginsAfterIndex ends on
|
|
// the given interval's start point, but that range isn't collapsed (a
|
|
// collapsed range should be included in the returned results).
|
|
nsRange* beginRange = mRanges[beginsAfterIndex].mRange;
|
|
if (RangeMatchesEndPoint(beginRange, aBeginNode, aBeginOffset) &&
|
|
!beginRange->Collapsed())
|
|
beginsAfterIndex++;
|
|
|
|
// Again, see above for the meaning of endsBeforeIndex at this point.
|
|
// In particular, endsBeforeIndex may point to a collaped range which
|
|
// represents the point at the end of the interval - this range should be
|
|
// included
|
|
if (endsBeforeIndex < (int32_t)mRanges.Length()) {
|
|
nsRange* endRange = mRanges[endsBeforeIndex].mRange;
|
|
if (RangeMatchesBeginPoint(endRange, aEndNode, aEndOffset) &&
|
|
endRange->Collapsed())
|
|
endsBeforeIndex++;
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(beginsAfterIndex <= endsBeforeIndex, "Is mRanges not ordered?");
|
|
NS_ENSURE_STATE(beginsAfterIndex <= endsBeforeIndex);
|
|
|
|
*aStartIndex = beginsAfterIndex;
|
|
*aEndIndex = endsBeforeIndex;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult Selection::GetPrimaryFrameForAnchorNode(nsIFrame** aReturnFrame) {
|
|
if (!aReturnFrame) return NS_ERROR_NULL_POINTER;
|
|
|
|
int32_t frameOffset = 0;
|
|
*aReturnFrame = 0;
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(GetAnchorNode());
|
|
if (content && mFrameSelection) {
|
|
*aReturnFrame = mFrameSelection->GetFrameForNodeOffset(
|
|
content, AnchorOffset(), mFrameSelection->GetHint(), &frameOffset);
|
|
if (*aReturnFrame) return NS_OK;
|
|
}
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult Selection::GetPrimaryFrameForFocusNode(nsIFrame** aReturnFrame,
|
|
int32_t* aOffsetUsed,
|
|
bool aVisual) {
|
|
if (!aReturnFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
*aReturnFrame = nullptr;
|
|
nsINode* focusNode = GetFocusNode();
|
|
if (!focusNode || !focusNode->IsContent() || !mFrameSelection) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> content = focusNode->AsContent();
|
|
int32_t frameOffset = 0;
|
|
if (!aOffsetUsed) {
|
|
aOffsetUsed = &frameOffset;
|
|
}
|
|
|
|
nsresult rv = GetPrimaryOrCaretFrameForNodeOffset(
|
|
content, FocusOffset(), aReturnFrame, aOffsetUsed, aVisual);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// If content is whitespace only, we promote focus node to parent because
|
|
// whitespace only node might have no frame.
|
|
|
|
if (!content->TextIsOnlyWhitespace()) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> parent = content->GetParent();
|
|
if (NS_WARN_IF(!parent)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
int32_t offset = parent->ComputeIndexOf(content);
|
|
|
|
return GetPrimaryOrCaretFrameForNodeOffset(parent, offset, aReturnFrame,
|
|
aOffsetUsed, aVisual);
|
|
}
|
|
|
|
nsresult Selection::GetPrimaryOrCaretFrameForNodeOffset(nsIContent* aContent,
|
|
uint32_t aOffset,
|
|
nsIFrame** aReturnFrame,
|
|
int32_t* aOffsetUsed,
|
|
bool aVisual) const {
|
|
MOZ_ASSERT(aReturnFrame);
|
|
MOZ_ASSERT(aOffsetUsed);
|
|
|
|
*aReturnFrame = nullptr;
|
|
|
|
if (!mFrameSelection) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
CaretAssociationHint hint = mFrameSelection->GetHint();
|
|
|
|
if (aVisual) {
|
|
nsBidiLevel caretBidiLevel = mFrameSelection->GetCaretBidiLevel();
|
|
|
|
return nsCaret::GetCaretFrameForNodeOffset(
|
|
mFrameSelection, aContent, aOffset, hint, caretBidiLevel, aReturnFrame,
|
|
/* aReturnUnadjustedFrame = */ nullptr, aOffsetUsed);
|
|
}
|
|
|
|
*aReturnFrame = mFrameSelection->GetFrameForNodeOffset(aContent, aOffset,
|
|
hint, aOffsetUsed);
|
|
if (!*aReturnFrame) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::SelectFramesForContent(nsIContent* aContent, bool aSelected) {
|
|
nsIFrame* frame = aContent->GetPrimaryFrame();
|
|
if (!frame) {
|
|
return;
|
|
}
|
|
// The frame could be an SVG text frame, in which case we don't treat it
|
|
// as a text frame.
|
|
if (frame->IsTextFrame()) {
|
|
nsTextFrame* textFrame = static_cast<nsTextFrame*>(frame);
|
|
textFrame->SetSelectedRange(0, textFrame->TextFragment()->GetLength(),
|
|
aSelected, mSelectionType);
|
|
} else {
|
|
frame->InvalidateFrameSubtree(); // frame continuations?
|
|
}
|
|
}
|
|
|
|
// select all content children of aContent
|
|
nsresult Selection::SelectAllFramesForContent(
|
|
PostContentIterator& aPostOrderIter, nsIContent* aContent, bool aSelected) {
|
|
// If aContent doesn't have children, we should avoid to use the content
|
|
// iterator for performance reason.
|
|
if (!aContent->HasChildren()) {
|
|
SelectFramesForContent(aContent, aSelected);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (NS_WARN_IF(NS_FAILED(aPostOrderIter.Init(aContent)))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
for (; !aPostOrderIter.IsDone(); aPostOrderIter.Next()) {
|
|
nsINode* node = aPostOrderIter.GetCurrentNode();
|
|
MOZ_ASSERT(node);
|
|
nsIContent* innercontent = node->IsContent() ? node->AsContent() : nullptr;
|
|
SelectFramesForContent(innercontent, aSelected);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::SelectFramesInAllRanges(nsPresContext* aPresContext) {
|
|
for (size_t i = 0; i < mRanges.Length(); ++i) {
|
|
nsRange* range = mRanges[i].mRange;
|
|
MOZ_ASSERT(range->IsInSelection());
|
|
SelectFrames(aPresContext, range, range->IsInSelection());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The idea of this helper method is to select or deselect "top to bottom",
|
|
* traversing through the frames
|
|
*/
|
|
nsresult Selection::SelectFrames(nsPresContext* aPresContext, nsRange* aRange,
|
|
bool aSelect) {
|
|
if (!mFrameSelection || !aPresContext || !aPresContext->GetPresShell()) {
|
|
// nothing to do
|
|
return NS_OK;
|
|
}
|
|
MOZ_ASSERT(aRange && aRange->IsPositioned());
|
|
|
|
if (mFrameSelection->GetTableCellSelection()) {
|
|
nsINode* node = aRange->GetCommonAncestor();
|
|
nsIFrame* frame = node->IsContent()
|
|
? node->AsContent()->GetPrimaryFrame()
|
|
: aPresContext->PresShell()->GetRootFrame();
|
|
if (frame) {
|
|
frame->InvalidateFrameSubtree();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Loop through the content iterator for each content node; for each text
|
|
// node, call SetSelected on it:
|
|
nsINode* startNode = aRange->GetStartContainer();
|
|
nsIContent* startContent =
|
|
startNode->IsContent() ? startNode->AsContent() : nullptr;
|
|
if (!startContent) {
|
|
// Don't warn, bug 1055722
|
|
// XXX The range can start from a document node and such range can be
|
|
// added to Selection with JS. Therefore, even in such cases,
|
|
// shouldn't we handle selection in the range?
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
// We must call first one explicitly
|
|
bool isFirstContentTextNode = startContent->IsText();
|
|
nsINode* endNode = aRange->GetEndContainer();
|
|
if (isFirstContentTextNode) {
|
|
nsIFrame* frame = startContent->GetPrimaryFrame();
|
|
// The frame could be an SVG text frame, in which case we don't treat it
|
|
// as a text frame.
|
|
if (frame) {
|
|
if (frame->IsTextFrame()) {
|
|
nsTextFrame* textFrame = static_cast<nsTextFrame*>(frame);
|
|
uint32_t startOffset = aRange->StartOffset();
|
|
uint32_t endOffset;
|
|
if (endNode == startContent) {
|
|
endOffset = aRange->EndOffset();
|
|
} else {
|
|
endOffset = startContent->Length();
|
|
}
|
|
textFrame->SetSelectedRange(startOffset, endOffset, aSelect,
|
|
mSelectionType);
|
|
} else {
|
|
frame->InvalidateFrameSubtree();
|
|
}
|
|
}
|
|
}
|
|
|
|
// If the range is in a node and the node is a leaf node, we don't need to
|
|
// walk the subtree.
|
|
if (aRange->Collapsed() ||
|
|
(startNode == endNode && !startNode->HasChildren())) {
|
|
if (!isFirstContentTextNode) {
|
|
SelectFramesForContent(startContent, aSelect);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
ContentSubtreeIterator subtreeIter;
|
|
subtreeIter.Init(aRange);
|
|
if (isFirstContentTextNode && !subtreeIter.IsDone() &&
|
|
subtreeIter.GetCurrentNode() == startNode) {
|
|
subtreeIter.Next(); // first content has already been handled.
|
|
}
|
|
PostContentIterator postOrderIter;
|
|
for (; !subtreeIter.IsDone(); subtreeIter.Next()) {
|
|
nsINode* node = subtreeIter.GetCurrentNode();
|
|
MOZ_ASSERT(node);
|
|
nsIContent* content = node->IsContent() ? node->AsContent() : nullptr;
|
|
SelectAllFramesForContent(postOrderIter, content, aSelect);
|
|
}
|
|
|
|
// We must now do the last one if it is not the same as the first
|
|
if (endNode != startNode) {
|
|
nsIContent* endContent =
|
|
endNode->IsContent() ? endNode->AsContent() : nullptr;
|
|
// XXX The range can end at a document node and such range can be
|
|
// added to Selection with JS. Therefore, even in such cases,
|
|
// shouldn't we handle selection in the range?
|
|
if (NS_WARN_IF(!endContent)) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
if (endContent->IsText()) {
|
|
nsIFrame* frame = endContent->GetPrimaryFrame();
|
|
// The frame could be an SVG text frame, in which case we'll ignore it.
|
|
if (frame && frame->IsTextFrame()) {
|
|
nsTextFrame* textFrame = static_cast<nsTextFrame*>(frame);
|
|
textFrame->SetSelectedRange(0, aRange->EndOffset(), aSelect,
|
|
mSelectionType);
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Selection::LookUpSelection
|
|
//
|
|
// This function is called when a node wants to know where the selection is
|
|
// over itself.
|
|
//
|
|
// Usually, this is called when we already know there is a selection over
|
|
// the node in question, and we only need to find the boundaries of it on
|
|
// that node. This is when slowCheck is false--a strict test is not needed.
|
|
// Other times, the caller has no idea, and wants us to test everything,
|
|
// so we are supposed to determine whether there is a selection over the
|
|
// node at all.
|
|
//
|
|
// A previous version of this code used this flag to do less work when
|
|
// inclusion was already known (slowCheck=false). However, our tree
|
|
// structure allows us to quickly determine ranges overlapping the node,
|
|
// so we just ignore the slowCheck flag and do the full test every time.
|
|
//
|
|
// PERFORMANCE: a common case is that we are doing a fast check with exactly
|
|
// one range in the selection. In this case, this function is slower than
|
|
// brute force because of the overhead of checking the tree. We can optimize
|
|
// this case to make it faster by doing the same thing the previous version
|
|
// of this function did in the case of 1 range. This would also mean that
|
|
// the aSlowCheck flag would have meaning again.
|
|
|
|
UniquePtr<SelectionDetails> Selection::LookUpSelection(
|
|
nsIContent* aContent, int32_t aContentOffset, int32_t aContentLength,
|
|
UniquePtr<SelectionDetails> aDetailsHead, SelectionType aSelectionType,
|
|
bool aSlowCheck) {
|
|
if (!aContent) {
|
|
return aDetailsHead;
|
|
}
|
|
|
|
// it is common to have no ranges, to optimize that
|
|
if (mRanges.Length() == 0) {
|
|
return aDetailsHead;
|
|
}
|
|
|
|
nsTArray<nsRange*> overlappingRanges;
|
|
nsresult rv = GetRangesForIntervalArray(aContent, aContentOffset, aContent,
|
|
aContentOffset + aContentLength,
|
|
false, &overlappingRanges);
|
|
if (NS_FAILED(rv)) {
|
|
return aDetailsHead;
|
|
}
|
|
|
|
if (overlappingRanges.Length() == 0) {
|
|
return aDetailsHead;
|
|
}
|
|
|
|
UniquePtr<SelectionDetails> detailsHead = std::move(aDetailsHead);
|
|
|
|
for (uint32_t i = 0; i < overlappingRanges.Length(); i++) {
|
|
nsRange* range = overlappingRanges[i];
|
|
nsINode* startNode = range->GetStartContainer();
|
|
nsINode* endNode = range->GetEndContainer();
|
|
int32_t startOffset = range->StartOffset();
|
|
int32_t endOffset = range->EndOffset();
|
|
|
|
int32_t start = -1, end = -1;
|
|
if (startNode == aContent && endNode == aContent) {
|
|
if (startOffset < (aContentOffset + aContentLength) &&
|
|
endOffset > aContentOffset) {
|
|
// this range is totally inside the requested content range
|
|
start = std::max(0, startOffset - aContentOffset);
|
|
end = std::min(aContentLength, endOffset - aContentOffset);
|
|
}
|
|
// otherwise, range is inside the requested node, but does not intersect
|
|
// the requested content range, so ignore it
|
|
} else if (startNode == aContent) {
|
|
if (startOffset < (aContentOffset + aContentLength)) {
|
|
// the beginning of the range is inside the requested node, but the
|
|
// end is outside, select everything from there to the end
|
|
start = std::max(0, startOffset - aContentOffset);
|
|
end = aContentLength;
|
|
}
|
|
} else if (endNode == aContent) {
|
|
if (endOffset > aContentOffset) {
|
|
// the end of the range is inside the requested node, but the beginning
|
|
// is outside, select everything from the beginning to there
|
|
start = 0;
|
|
end = std::min(aContentLength, endOffset - aContentOffset);
|
|
}
|
|
} else {
|
|
// this range does not begin or end in the requested node, but since
|
|
// GetRangesForInterval returned this range, we know it overlaps.
|
|
// Therefore, this node is enclosed in the range, and we select all
|
|
// of it.
|
|
start = 0;
|
|
end = aContentLength;
|
|
}
|
|
if (start < 0) continue; // the ranges do not overlap the input range
|
|
|
|
auto newHead = MakeUnique<SelectionDetails>();
|
|
|
|
newHead->mNext = std::move(detailsHead);
|
|
newHead->mStart = start;
|
|
newHead->mEnd = end;
|
|
newHead->mSelectionType = aSelectionType;
|
|
RangeData* rd = FindRangeData(range);
|
|
if (rd) {
|
|
newHead->mTextRangeStyle = rd->mTextRangeStyle;
|
|
}
|
|
detailsHead = std::move(newHead);
|
|
}
|
|
return detailsHead;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
Selection::Repaint(nsPresContext* aPresContext) {
|
|
int32_t arrCount = (int32_t)mRanges.Length();
|
|
|
|
if (arrCount < 1) return NS_OK;
|
|
|
|
int32_t i;
|
|
|
|
for (i = 0; i < arrCount; i++) {
|
|
nsresult rv = SelectFrames(aPresContext, mRanges[i].mRange, true);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::SetCanCacheFrameOffset(bool aCanCacheFrameOffset) {
|
|
if (!mCachedOffsetForFrame) {
|
|
mCachedOffsetForFrame = new CachedOffsetForFrame;
|
|
}
|
|
|
|
mCachedOffsetForFrame->mCanCacheFrameOffset = aCanCacheFrameOffset;
|
|
|
|
// clean up cached frame when turn off cache
|
|
// fix bug 207936
|
|
if (!aCanCacheFrameOffset) {
|
|
mCachedOffsetForFrame->mLastCaretFrame = nullptr;
|
|
}
|
|
}
|
|
|
|
nsresult Selection::GetCachedFrameOffset(nsIFrame* aFrame, int32_t inOffset,
|
|
nsPoint& aPoint) {
|
|
if (!mCachedOffsetForFrame) {
|
|
mCachedOffsetForFrame = new CachedOffsetForFrame;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
if (mCachedOffsetForFrame->mCanCacheFrameOffset &&
|
|
mCachedOffsetForFrame->mLastCaretFrame &&
|
|
(aFrame == mCachedOffsetForFrame->mLastCaretFrame) &&
|
|
(inOffset == mCachedOffsetForFrame->mLastContentOffset)) {
|
|
// get cached frame offset
|
|
aPoint = mCachedOffsetForFrame->mCachedFrameOffset;
|
|
} else {
|
|
// Recalculate frame offset and cache it. Don't cache a frame offset if
|
|
// GetPointFromOffset fails, though.
|
|
rv = aFrame->GetPointFromOffset(inOffset, &aPoint);
|
|
if (NS_SUCCEEDED(rv) && mCachedOffsetForFrame->mCanCacheFrameOffset) {
|
|
mCachedOffsetForFrame->mCachedFrameOffset = aPoint;
|
|
mCachedOffsetForFrame->mLastCaretFrame = aFrame;
|
|
mCachedOffsetForFrame->mLastContentOffset = inOffset;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsIContent* Selection::GetAncestorLimiter() const {
|
|
if (mFrameSelection) {
|
|
return mFrameSelection->GetAncestorLimiter();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void Selection::SetAncestorLimiter(nsIContent* aLimiter) {
|
|
if (mFrameSelection) {
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
frameSelection->SetAncestorLimiter(aLimiter);
|
|
}
|
|
}
|
|
|
|
RangeData* Selection::FindRangeData(nsRange* aRange) {
|
|
NS_ENSURE_TRUE(aRange, nullptr);
|
|
for (uint32_t i = 0; i < mRanges.Length(); i++) {
|
|
if (mRanges[i].mRange == aRange) return &mRanges[i];
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
nsresult Selection::SetTextRangeStyle(nsRange* aRange,
|
|
const TextRangeStyle& aTextRangeStyle) {
|
|
NS_ENSURE_ARG_POINTER(aRange);
|
|
RangeData* rd = FindRangeData(aRange);
|
|
if (rd) {
|
|
rd->mTextRangeStyle = aTextRangeStyle;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult Selection::StartAutoScrollTimer(nsIFrame* aFrame,
|
|
const nsPoint& aPoint,
|
|
uint32_t aDelay) {
|
|
MOZ_ASSERT(aFrame, "Need a frame");
|
|
|
|
nsresult result;
|
|
if (!mFrameSelection) {
|
|
return NS_OK; // nothing to do
|
|
}
|
|
|
|
if (!mAutoScrollTimer) {
|
|
mAutoScrollTimer = new nsAutoScrollTimer();
|
|
|
|
result = mAutoScrollTimer->Init(mFrameSelection, this);
|
|
|
|
if (NS_FAILED(result)) {
|
|
return result;
|
|
}
|
|
}
|
|
|
|
result = mAutoScrollTimer->SetDelay(aDelay);
|
|
|
|
if (NS_FAILED(result)) {
|
|
return result;
|
|
}
|
|
|
|
return DoAutoScroll(aFrame, aPoint);
|
|
}
|
|
|
|
nsresult Selection::StopAutoScrollTimer() {
|
|
if (mAutoScrollTimer) {
|
|
return mAutoScrollTimer->Stop();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult Selection::DoAutoScroll(nsIFrame* aFrame, nsPoint aPoint) {
|
|
MOZ_ASSERT(aFrame, "Need a frame");
|
|
|
|
if (mAutoScrollTimer) {
|
|
(void)mAutoScrollTimer->Stop();
|
|
}
|
|
|
|
nsPresContext* presContext = aFrame->PresContext();
|
|
RefPtr<PresShell> presShell = presContext->PresShell();
|
|
nsRootPresContext* rootPC = presContext->GetRootPresContext();
|
|
if (!rootPC) return NS_OK;
|
|
nsIFrame* rootmostFrame = rootPC->PresShell()->GetRootFrame();
|
|
AutoWeakFrame weakRootFrame(rootmostFrame);
|
|
AutoWeakFrame weakFrame(aFrame);
|
|
// Get the point relative to the root most frame because the scroll we are
|
|
// about to do will change the coordinates of aFrame.
|
|
nsPoint globalPoint = aPoint + aFrame->GetOffsetToCrossDoc(rootmostFrame);
|
|
|
|
bool done = false;
|
|
bool didScroll;
|
|
while (true) {
|
|
didScroll = presShell->ScrollFrameRectIntoView(
|
|
aFrame, nsRect(aPoint, nsSize(0, 0)), ScrollAxis(), ScrollAxis(),
|
|
ScrollFlags::IgnoreMarginAndPadding);
|
|
if (!weakFrame || !weakRootFrame) {
|
|
return NS_OK;
|
|
}
|
|
if (!didScroll && !done) {
|
|
// If aPoint is at the screen edge then try to scroll anyway, once.
|
|
RefPtr<nsDeviceContext> dx =
|
|
presShell->GetViewManager()->GetDeviceContext();
|
|
nsRect screen;
|
|
dx->GetRect(screen);
|
|
nsPoint screenPoint =
|
|
globalPoint + rootmostFrame->GetScreenRectInAppUnits().TopLeft();
|
|
nscoord onePx = AppUnitsPerCSSPixel();
|
|
nscoord scrollAmount = 10 * onePx;
|
|
if (std::abs(screen.x - screenPoint.x) <= onePx) {
|
|
aPoint.x -= scrollAmount;
|
|
} else if (std::abs(screen.XMost() - screenPoint.x) <= onePx) {
|
|
aPoint.x += scrollAmount;
|
|
} else if (std::abs(screen.y - screenPoint.y) <= onePx) {
|
|
aPoint.y -= scrollAmount;
|
|
} else if (std::abs(screen.YMost() - screenPoint.y) <= onePx) {
|
|
aPoint.y += scrollAmount;
|
|
} else {
|
|
break;
|
|
}
|
|
done = true;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Start the AutoScroll timer if necessary.
|
|
if (didScroll && mAutoScrollTimer) {
|
|
nsPoint presContextPoint =
|
|
globalPoint -
|
|
presShell->GetRootFrame()->GetOffsetToCrossDoc(rootmostFrame);
|
|
mAutoScrollTimer->Start(presContext, presContextPoint);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::RemoveAllRanges(ErrorResult& aRv) {
|
|
if (!mFrameSelection) return; // nothing to do
|
|
RefPtr<nsPresContext> presContext = GetPresContext();
|
|
nsresult result = Clear(presContext);
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
return;
|
|
}
|
|
|
|
// Turn off signal for table selection
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
frameSelection->ClearTableCellSelection();
|
|
|
|
// Be aware, this instance may be destroyed after this call.
|
|
// XXX Why doesn't this call Selection::NotifySelectionListener() directly?
|
|
result = frameSelection->NotifySelectionListeners(GetType());
|
|
|
|
// Also need to notify the frames!
|
|
// PresShell::CharacterDataChanged should do that on DocumentChanged
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
}
|
|
}
|
|
|
|
nsresult Selection::RemoveAllRangesTemporarily() {
|
|
if (!mCachedRange) {
|
|
// Look for a range which isn't referred by other than this instance.
|
|
// If there is, it'll be released by calling Clear(). So, we can reuse it
|
|
// when we need to create a range.
|
|
for (auto& rangeData : mRanges) {
|
|
auto& range = rangeData.mRange;
|
|
if (range->GetRefCount() == 1 ||
|
|
(range->GetRefCount() == 2 && range == mAnchorFocusRange)) {
|
|
mCachedRange = range;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Then, remove all ranges.
|
|
ErrorResult result;
|
|
RemoveAllRanges(result);
|
|
if (result.Failed()) {
|
|
mCachedRange = nullptr;
|
|
} else if (mCachedRange) {
|
|
// To save the computing cost to keep valid DOM point against DOM tree
|
|
// changes, we should clear the range temporarily.
|
|
mCachedRange->ResetTemporarily();
|
|
}
|
|
return result.StealNSResult();
|
|
}
|
|
|
|
void Selection::AddRangeJS(nsRange& aRange, ErrorResult& aRv) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = true;
|
|
AddRange(aRange, aRv);
|
|
}
|
|
|
|
void Selection::AddRange(nsRange& aRange, ErrorResult& aRv) {
|
|
RefPtr<Document> document(GetParentObject());
|
|
return AddRangeInternal(aRange, document, aRv);
|
|
}
|
|
|
|
void Selection::AddRangeInternal(nsRange& aRange, Document* aDocument,
|
|
ErrorResult& aRv) {
|
|
// If the given range is part of another Selection, we need to clone the
|
|
// range first.
|
|
RefPtr<nsRange> range;
|
|
if (aRange.IsInSelection() && aRange.GetSelection() != this) {
|
|
// Because of performance reason, when there is a cached range, let's use
|
|
// it. Otherwise, clone the range.
|
|
if (mCachedRange) {
|
|
range = std::move(mCachedRange);
|
|
nsresult rv = range->SetStartAndEnd(aRange.StartRef().AsRaw(),
|
|
aRange.EndRef().AsRaw());
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return;
|
|
}
|
|
} else {
|
|
range = aRange.CloneRange();
|
|
}
|
|
} else {
|
|
range = &aRange;
|
|
}
|
|
|
|
nsINode* rangeRoot = range->GetRoot();
|
|
if (aDocument != rangeRoot &&
|
|
(!rangeRoot || aDocument != rangeRoot->GetComposedDoc())) {
|
|
// http://w3c.github.io/selection-api/#dom-selection-addrange
|
|
// "... if the root of the range's boundary points are the document
|
|
// associated with context object. Otherwise, this method must do nothing."
|
|
return;
|
|
}
|
|
|
|
// If a range is being added, we don't need cached range because Collapse()
|
|
// won't use it.
|
|
mCachedRange = nullptr;
|
|
|
|
// AddTableCellRange might flush frame.
|
|
RefPtr<Selection> kungFuDeathGrip(this);
|
|
|
|
// This inserts a table cell range in proper document order
|
|
// and returns NS_OK if range doesn't contain just one table cell
|
|
bool didAddRange;
|
|
int32_t rangeIndex;
|
|
nsresult result = AddTableCellRange(range, &didAddRange, &rangeIndex);
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
return;
|
|
}
|
|
|
|
if (!didAddRange) {
|
|
result = AddItem(range, &rangeIndex);
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (rangeIndex < 0) {
|
|
return;
|
|
}
|
|
|
|
SetAnchorFocusRange(rangeIndex);
|
|
|
|
// Make sure the caret appears on the next line, if at a newline
|
|
if (mSelectionType == SelectionType::eNormal) {
|
|
SetInterlinePosition(true, IgnoreErrors());
|
|
}
|
|
|
|
RefPtr<nsPresContext> presContext = GetPresContext();
|
|
SelectFrames(presContext, range, true);
|
|
|
|
if (!mFrameSelection) return; // nothing to do
|
|
|
|
// Be aware, this instance may be destroyed after this call.
|
|
// XXX Why doesn't this call Selection::NotifySelectionListener() directly?
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
result = frameSelection->NotifySelectionListeners(GetType());
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
}
|
|
}
|
|
|
|
// Selection::RemoveRange
|
|
//
|
|
// Removes the given range from the selection. The tricky part is updating
|
|
// the flags on the frames that indicate whether they have a selection or
|
|
// not. There could be several selection ranges on the frame, and clearing
|
|
// the bit would cause the selection to not be drawn, even when there is
|
|
// another range on the frame (bug 346185).
|
|
//
|
|
// We therefore find any ranges that intersect the same nodes as the range
|
|
// being removed, and cause them to set the selected bits back on their
|
|
// selected frames after we've cleared the bit from ours.
|
|
|
|
void Selection::RemoveRange(nsRange& aRange, ErrorResult& aRv) {
|
|
nsresult rv = RemoveItem(&aRange);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
return;
|
|
}
|
|
|
|
nsINode* beginNode = aRange.GetStartContainer();
|
|
nsINode* endNode = aRange.GetEndContainer();
|
|
|
|
if (!beginNode || !endNode) {
|
|
// Detached range; nothing else to do here.
|
|
return;
|
|
}
|
|
|
|
// find out the length of the end node, so we can select all of it
|
|
int32_t beginOffset, endOffset;
|
|
if (endNode->IsText()) {
|
|
// Get the length of the text. We can't just use the offset because
|
|
// another range could be touching this text node but not intersect our
|
|
// range.
|
|
beginOffset = 0;
|
|
endOffset = endNode->AsText()->TextLength();
|
|
} else {
|
|
// For non-text nodes, the given offsets should be sufficient.
|
|
beginOffset = aRange.StartOffset();
|
|
endOffset = aRange.EndOffset();
|
|
}
|
|
|
|
// clear the selected bit from the removed range's frames
|
|
RefPtr<nsPresContext> presContext = GetPresContext();
|
|
SelectFrames(presContext, &aRange, false);
|
|
|
|
// add back the selected bit for each range touching our nodes
|
|
nsTArray<nsRange*> affectedRanges;
|
|
rv = GetRangesForIntervalArray(beginNode, beginOffset, endNode, endOffset,
|
|
true, &affectedRanges);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
return;
|
|
}
|
|
for (uint32_t i = 0; i < affectedRanges.Length(); i++) {
|
|
SelectFrames(presContext, affectedRanges[i], true);
|
|
}
|
|
|
|
int32_t cnt = mRanges.Length();
|
|
if (&aRange == mAnchorFocusRange) {
|
|
// Reset anchor to LAST range or clear it if there are no ranges.
|
|
SetAnchorFocusRange(cnt - 1);
|
|
|
|
// When the selection is user-created it makes sense to scroll the range
|
|
// into view. The spell-check selection, however, is created and destroyed
|
|
// in the background. We don't want to scroll in this case or the view
|
|
// might appear to be moving randomly (bug 337871).
|
|
if (mSelectionType != SelectionType::eSpellCheck && cnt > 0) {
|
|
ScrollIntoView(nsISelectionController::SELECTION_FOCUS_REGION);
|
|
}
|
|
}
|
|
|
|
if (!mFrameSelection) return; // nothing to do
|
|
|
|
// Be aware, this instance may be destroyed after this call.
|
|
// XXX Why doesn't this call Selection::NotifySelectionListener() directly?
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
rv = frameSelection->NotifySelectionListeners(GetType());
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Collapse sets the whole selection to be one point.
|
|
*/
|
|
void Selection::CollapseJS(nsINode* aContainer, uint32_t aOffset,
|
|
ErrorResult& aRv) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = true;
|
|
if (!aContainer) {
|
|
RemoveAllRanges(aRv);
|
|
return;
|
|
}
|
|
Collapse(RawRangeBoundary(aContainer, aOffset), aRv);
|
|
}
|
|
|
|
void Selection::Collapse(const RawRangeBoundary& aPoint, ErrorResult& aRv) {
|
|
if (!mFrameSelection) {
|
|
aRv.Throw(NS_ERROR_NOT_INITIALIZED); // Can't do selection
|
|
return;
|
|
}
|
|
|
|
if (!aPoint.IsSet()) {
|
|
aRv.Throw(NS_ERROR_INVALID_ARG);
|
|
return;
|
|
}
|
|
|
|
if (aPoint.Container()->NodeType() == nsINode::DOCUMENT_TYPE_NODE) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_NODE_TYPE_ERR);
|
|
return;
|
|
}
|
|
|
|
// RawRangeBoundary::IsSetAndValid() checks if the point actually refers
|
|
// a child of the container when IsSet() is true. If its offset hasn't been
|
|
// computed yet, this just checks it with its mRef. So, we can avoid
|
|
// computing offset here.
|
|
if (!aPoint.IsSetAndValid()) {
|
|
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
|
|
return;
|
|
}
|
|
|
|
if (!HasSameRoot(*aPoint.Container())) {
|
|
// Return with no error
|
|
return;
|
|
}
|
|
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
frameSelection->InvalidateDesiredPos();
|
|
if (!IsValidSelectionPoint(frameSelection, aPoint.Container())) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
nsresult result;
|
|
|
|
RefPtr<nsPresContext> presContext = GetPresContext();
|
|
if (!presContext ||
|
|
presContext->Document() != aPoint.Container()->OwnerDoc()) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
// Cache current range is if there is because it may be reusable.
|
|
RefPtr<nsRange> oldRange = !mRanges.IsEmpty() ? mRanges[0].mRange : nullptr;
|
|
|
|
// Delete all of the current ranges
|
|
Clear(presContext);
|
|
|
|
// Turn off signal for table selection
|
|
frameSelection->ClearTableCellSelection();
|
|
|
|
// Hack to display the caret on the right line (bug 1237236).
|
|
if (frameSelection->GetHint() != CARET_ASSOCIATE_AFTER &&
|
|
aPoint.Container()->IsContent()) {
|
|
int32_t frameOffset;
|
|
nsTextFrame* f = do_QueryFrame(nsCaret::GetFrameAndOffset(
|
|
this, aPoint.Container(), aPoint.Offset(), &frameOffset));
|
|
if (f && f->IsAtEndOfLine() && f->HasSignificantTerminalNewline()) {
|
|
// RawRangeBounary::Offset() causes computing offset if it's not been
|
|
// done yet. However, it's called only when the container is a text
|
|
// node. In such case, offset has always been set since it cannot have
|
|
// any children. So, this doesn't cause computing offset with expensive
|
|
// method, nsINode::ComputeIndexOf().
|
|
if ((aPoint.Container()->AsContent() == f->GetContent() &&
|
|
f->GetContentEnd() == static_cast<int32_t>(aPoint.Offset())) ||
|
|
(aPoint.Container() == f->GetContent()->GetParentNode() &&
|
|
f->GetContent() == aPoint.GetPreviousSiblingOfChildAtOffset())) {
|
|
frameSelection->SetHint(CARET_ASSOCIATE_AFTER);
|
|
}
|
|
}
|
|
}
|
|
|
|
RefPtr<nsRange> range;
|
|
// If the old range isn't referred by anybody other than this method,
|
|
// we should reuse it for reducing the recreation cost.
|
|
if (oldRange && oldRange->GetRefCount() == 1) {
|
|
range = std::move(oldRange);
|
|
} else if (mCachedRange) {
|
|
range = std::move(mCachedRange);
|
|
} else {
|
|
range = new nsRange(aPoint.Container());
|
|
}
|
|
result = range->CollapseTo(aPoint);
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
return;
|
|
}
|
|
|
|
#ifdef DEBUG_SELECTION
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(aPoint.Container());
|
|
nsCOMPtr<Document> doc = do_QueryInterface(aPoint.Container());
|
|
printf("Sel. Collapse to %p %s %d\n", container.get(),
|
|
content ? nsAtomCString(content->NodeInfo()->NameAtom()).get()
|
|
: (doc ? "DOCUMENT" : "???"),
|
|
aPoint.Offset());
|
|
#endif
|
|
|
|
int32_t rangeIndex = -1;
|
|
result = AddItem(range, &rangeIndex);
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
return;
|
|
}
|
|
SetAnchorFocusRange(0);
|
|
SelectFrames(presContext, range, true);
|
|
|
|
// Be aware, this instance may be destroyed after this call.
|
|
// XXX Why doesn't this call Selection::NotifySelectionListener() directly?
|
|
result = frameSelection->NotifySelectionListeners(GetType());
|
|
if (NS_FAILED(result)) {
|
|
aRv.Throw(result);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Sets the whole selection to be one point
|
|
* at the start of the current selection
|
|
*/
|
|
void Selection::CollapseToStartJS(ErrorResult& aRv) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = true;
|
|
CollapseToStart(aRv);
|
|
}
|
|
|
|
void Selection::CollapseToStart(ErrorResult& aRv) {
|
|
if (RangeCount() == 0) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return;
|
|
}
|
|
|
|
// Get the first range
|
|
nsRange* firstRange = mRanges[0].mRange;
|
|
if (!firstRange) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
if (mFrameSelection) {
|
|
int16_t reason = mFrameSelection->PopReason() |
|
|
nsISelectionListener::COLLAPSETOSTART_REASON;
|
|
mFrameSelection->PostReason(reason);
|
|
}
|
|
nsINode* container = firstRange->GetStartContainer();
|
|
if (!container) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
Collapse(*container, firstRange->StartOffset(), aRv);
|
|
}
|
|
|
|
/*
|
|
* Sets the whole selection to be one point
|
|
* at the end of the current selection
|
|
*/
|
|
void Selection::CollapseToEndJS(ErrorResult& aRv) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = true;
|
|
CollapseToEnd(aRv);
|
|
}
|
|
|
|
void Selection::CollapseToEnd(ErrorResult& aRv) {
|
|
uint32_t cnt = RangeCount();
|
|
if (cnt == 0) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return;
|
|
}
|
|
|
|
// Get the last range
|
|
nsRange* lastRange = mRanges[cnt - 1].mRange;
|
|
if (!lastRange) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
if (mFrameSelection) {
|
|
int16_t reason = mFrameSelection->PopReason() |
|
|
nsISelectionListener::COLLAPSETOEND_REASON;
|
|
mFrameSelection->PostReason(reason);
|
|
}
|
|
nsINode* container = lastRange->GetEndContainer();
|
|
if (!container) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
Collapse(*container, lastRange->EndOffset(), aRv);
|
|
}
|
|
|
|
void Selection::GetType(nsAString& aOutType) const {
|
|
if (!RangeCount()) {
|
|
aOutType.AssignLiteral("None");
|
|
} else if (IsCollapsed()) {
|
|
aOutType.AssignLiteral("Caret");
|
|
} else {
|
|
aOutType.AssignLiteral("Range");
|
|
}
|
|
}
|
|
|
|
nsRange* Selection::GetRangeAt(uint32_t aIndex, ErrorResult& aRv) {
|
|
nsRange* range = GetRangeAt(aIndex);
|
|
if (!range) {
|
|
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
return range;
|
|
}
|
|
|
|
nsRange* Selection::GetRangeAt(int32_t aIndex) const {
|
|
RangeData empty(nullptr);
|
|
return mRanges.SafeElementAt(aIndex, empty).mRange;
|
|
}
|
|
|
|
/*
|
|
utility function
|
|
*/
|
|
nsresult Selection::SetAnchorFocusToRange(nsRange* aRange) {
|
|
NS_ENSURE_STATE(mAnchorFocusRange);
|
|
|
|
bool collapsed = IsCollapsed();
|
|
|
|
nsresult res = RemoveItem(mAnchorFocusRange);
|
|
if (NS_FAILED(res)) return res;
|
|
|
|
int32_t aOutIndex = -1;
|
|
res = AddItem(aRange, &aOutIndex, !collapsed);
|
|
if (NS_FAILED(res)) return res;
|
|
SetAnchorFocusRange(aOutIndex);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::ReplaceAnchorFocusRange(nsRange* aRange) {
|
|
NS_ENSURE_TRUE_VOID(mAnchorFocusRange);
|
|
RefPtr<nsPresContext> presContext = GetPresContext();
|
|
if (presContext) {
|
|
SelectFrames(presContext, mAnchorFocusRange, false);
|
|
SetAnchorFocusToRange(aRange);
|
|
SelectFrames(presContext, mAnchorFocusRange, true);
|
|
}
|
|
}
|
|
|
|
void Selection::AdjustAnchorFocusForMultiRange(nsDirection aDirection) {
|
|
if (aDirection == mDirection) {
|
|
return;
|
|
}
|
|
SetDirection(aDirection);
|
|
|
|
if (RangeCount() <= 1) {
|
|
return;
|
|
}
|
|
|
|
nsRange* firstRange = GetRangeAt(0);
|
|
nsRange* lastRange = GetRangeAt(RangeCount() - 1);
|
|
|
|
if (mDirection == eDirPrevious) {
|
|
firstRange->SetIsGenerated(false);
|
|
lastRange->SetIsGenerated(true);
|
|
SetAnchorFocusRange(0);
|
|
} else { // aDir == eDirNext
|
|
firstRange->SetIsGenerated(true);
|
|
lastRange->SetIsGenerated(false);
|
|
SetAnchorFocusRange(RangeCount() - 1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
Notes which might come in handy for extend:
|
|
|
|
We can tell the direction of the selection by asking for the anchors selection
|
|
if the begin is less than the end then we know the selection is to the "right".
|
|
else it is a backwards selection.
|
|
a = anchor
|
|
1 = old cursor
|
|
2 = new cursor
|
|
|
|
if (a <= 1 && 1 <=2) a,1,2 or (a1,2)
|
|
if (a < 2 && 1 > 2) a,2,1
|
|
if (1 < a && a <2) 1,a,2
|
|
if (a > 2 && 2 >1) 1,2,a
|
|
if (2 < a && a <1) 2,a,1
|
|
if (a > 1 && 1 >2) 2,1,a
|
|
then execute
|
|
a 1 2 select from 1 to 2
|
|
a 2 1 deselect from 2 to 1
|
|
1 a 2 deselect from 1 to a select from a to 2
|
|
1 2 a deselect from 1 to 2
|
|
2 1 a = continue selection from 2 to 1
|
|
*/
|
|
|
|
/*
|
|
* Extend extends the selection away from the anchor.
|
|
* We don't need to know the direction, because we always change the focus.
|
|
*/
|
|
void Selection::ExtendJS(nsINode& aContainer, uint32_t aOffset,
|
|
ErrorResult& aRv) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = true;
|
|
Extend(aContainer, aOffset, aRv);
|
|
}
|
|
|
|
nsresult Selection::Extend(nsINode* aContainer, int32_t aOffset) {
|
|
if (!aContainer) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
ErrorResult result;
|
|
Extend(*aContainer, static_cast<uint32_t>(aOffset), result);
|
|
return result.StealNSResult();
|
|
}
|
|
|
|
void Selection::Extend(nsINode& aContainer, uint32_t aOffset,
|
|
ErrorResult& aRv) {
|
|
// First, find the range containing the old focus point:
|
|
if (!mAnchorFocusRange) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return;
|
|
}
|
|
|
|
if (!mFrameSelection) {
|
|
aRv.Throw(NS_ERROR_NOT_INITIALIZED); // Can't do selection
|
|
return;
|
|
}
|
|
|
|
if (!HasSameRoot(aContainer)) {
|
|
// Return with no error
|
|
return;
|
|
}
|
|
|
|
nsresult res;
|
|
if (!IsValidSelectionPoint(mFrameSelection, &aContainer)) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
RefPtr<nsPresContext> presContext = GetPresContext();
|
|
if (!presContext || presContext->Document() != aContainer.OwnerDoc()) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
#ifdef DEBUG_SELECTION
|
|
nsDirection oldDirection = GetDirection();
|
|
#endif
|
|
nsINode* anchorNode = GetAnchorNode();
|
|
nsINode* focusNode = GetFocusNode();
|
|
uint32_t anchorOffset = AnchorOffset();
|
|
uint32_t focusOffset = FocusOffset();
|
|
|
|
RefPtr<nsRange> range = mAnchorFocusRange->CloneRange();
|
|
|
|
nsINode* startNode = range->GetStartContainer();
|
|
nsINode* endNode = range->GetEndContainer();
|
|
int32_t startOffset = range->StartOffset();
|
|
int32_t endOffset = range->EndOffset();
|
|
|
|
// compare anchor to old cursor.
|
|
|
|
// We pass |disconnected| to the following ComparePoints calls in order
|
|
// to avoid assertions. ComparePoints returns 1 in the disconnected case
|
|
// and we can end up in various cases below, but it is assumed that in
|
|
// any of the cases we end up, the nsRange implementation will collapse
|
|
// the range to the new point because we can not make a valid range with
|
|
// a disconnected point. This means that whatever range is currently
|
|
// selected will be cleared.
|
|
bool disconnected = false;
|
|
bool shouldClearRange = false;
|
|
int32_t result1 = nsContentUtils::ComparePoints(
|
|
anchorNode, anchorOffset, focusNode, focusOffset, &disconnected);
|
|
// compare old cursor to new cursor
|
|
shouldClearRange |= disconnected;
|
|
int32_t result2 = nsContentUtils::ComparePoints(
|
|
focusNode, focusOffset, &aContainer, aOffset, &disconnected);
|
|
// compare anchor to new cursor
|
|
shouldClearRange |= disconnected;
|
|
int32_t result3 = nsContentUtils::ComparePoints(
|
|
anchorNode, anchorOffset, &aContainer, aOffset, &disconnected);
|
|
|
|
// If the points are disconnected, the range will be collapsed below,
|
|
// resulting in a range that selects nothing.
|
|
if (shouldClearRange) {
|
|
// Repaint the current range with the selection removed.
|
|
SelectFrames(presContext, range, false);
|
|
}
|
|
|
|
RefPtr<nsRange> difRange = new nsRange(&aContainer);
|
|
if ((result1 == 0 && result3 < 0) ||
|
|
(result1 <= 0 && result2 < 0)) { // a1,2 a,1,2
|
|
// select from 1 to 2 unless they are collapsed
|
|
range->SetEnd(aContainer, aOffset, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
SetDirection(eDirNext);
|
|
res = difRange->SetStartAndEnd(
|
|
focusNode, focusOffset, range->GetEndContainer(), range->EndOffset());
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
SelectFrames(presContext, difRange, true);
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
} else if (result1 == 0 && result3 > 0) { // 2, a1
|
|
// select from 2 to 1a
|
|
SetDirection(eDirPrevious);
|
|
range->SetStart(aContainer, aOffset, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
SelectFrames(presContext, range, true);
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
} else if (result3 <= 0 && result2 >= 0) { // a,2,1 or a2,1 or a,21 or a21
|
|
// deselect from 2 to 1
|
|
res =
|
|
difRange->SetStartAndEnd(&aContainer, aOffset, focusNode, focusOffset);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
|
|
range->SetEnd(aContainer, aOffset, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
SelectFrames(presContext, difRange, false); // deselect now
|
|
difRange->SetEnd(range->GetEndContainer(), range->EndOffset());
|
|
SelectFrames(presContext, difRange, true); // must reselect last node
|
|
// maybe more
|
|
} else if (result1 >= 0 && result3 <= 0) { // 1,a,2 or 1a,2 or 1,a2 or 1a2
|
|
if (GetDirection() == eDirPrevious) {
|
|
res = range->SetStart(endNode, endOffset);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
}
|
|
SetDirection(eDirNext);
|
|
range->SetEnd(aContainer, aOffset, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
if (focusNode != anchorNode ||
|
|
focusOffset != anchorOffset) { // if collapsed diff dont do anything
|
|
res = difRange->SetStart(focusNode, focusOffset);
|
|
nsresult tmp = difRange->SetEnd(anchorNode, anchorOffset);
|
|
if (NS_FAILED(tmp)) {
|
|
res = tmp;
|
|
}
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
// deselect from 1 to a
|
|
SelectFrames(presContext, difRange, false);
|
|
} else {
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
}
|
|
// select from a to 2
|
|
SelectFrames(presContext, range, true);
|
|
} else if (result2 <= 0 && result3 >= 0) { // 1,2,a or 12,a or 1,2a or 12a
|
|
// deselect from 1 to 2
|
|
res =
|
|
difRange->SetStartAndEnd(focusNode, focusOffset, &aContainer, aOffset);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
SetDirection(eDirPrevious);
|
|
range->SetStart(aContainer, aOffset, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
SelectFrames(presContext, difRange, false);
|
|
difRange->SetStart(range->GetStartContainer(), range->StartOffset());
|
|
SelectFrames(presContext, difRange, true); // must reselect last node
|
|
} else if (result3 >= 0 && result1 <= 0) { // 2,a,1 or 2a,1 or 2,a1 or 2a1
|
|
if (GetDirection() == eDirNext) {
|
|
range->SetEnd(startNode, startOffset);
|
|
}
|
|
SetDirection(eDirPrevious);
|
|
range->SetStart(aContainer, aOffset, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
// deselect from a to 1
|
|
if (focusNode != anchorNode ||
|
|
focusOffset != anchorOffset) { // if collapsed diff dont do anything
|
|
res = difRange->SetStartAndEnd(anchorNode, anchorOffset, focusNode,
|
|
focusOffset);
|
|
nsresult tmp = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(tmp)) {
|
|
res = tmp;
|
|
}
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
SelectFrames(presContext, difRange, false);
|
|
} else {
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
}
|
|
// select from 2 to a
|
|
SelectFrames(presContext, range, true);
|
|
} else if (result2 >= 0 && result1 >= 0) { // 2,1,a or 21,a or 2,1a or 21a
|
|
// select from 2 to 1
|
|
range->SetStart(aContainer, aOffset, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
SetDirection(eDirPrevious);
|
|
res =
|
|
difRange->SetStartAndEnd(range->GetStartContainer(),
|
|
range->StartOffset(), focusNode, focusOffset);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
|
|
SelectFrames(presContext, difRange, true);
|
|
res = SetAnchorFocusToRange(range);
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (mRanges.Length() > 1) {
|
|
SelectFramesInAllRanges(presContext);
|
|
}
|
|
|
|
DEBUG_OUT_RANGE(range);
|
|
#ifdef DEBUG_SELECTION
|
|
if (GetDirection() != oldDirection) {
|
|
printf(" direction changed to %s\n",
|
|
GetDirection() == eDirNext ? "eDirNext" : "eDirPrevious");
|
|
}
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(&aContainer);
|
|
printf("Sel. Extend to %p %s %d\n", content.get(),
|
|
nsAtomCString(content->NodeInfo()->NameAtom()).get(), aOffset);
|
|
#endif
|
|
|
|
// Be aware, this instance may be destroyed after this call.
|
|
// XXX Why doesn't this call Selection::NotifySelectionListener() directly?
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
res = frameSelection->NotifySelectionListeners(GetType());
|
|
if (NS_FAILED(res)) {
|
|
aRv.Throw(res);
|
|
}
|
|
}
|
|
|
|
void Selection::SelectAllChildrenJS(nsINode& aNode, ErrorResult& aRv) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = true;
|
|
SelectAllChildren(aNode, aRv);
|
|
}
|
|
|
|
void Selection::SelectAllChildren(nsINode& aNode, ErrorResult& aRv) {
|
|
if (aNode.NodeType() == nsINode::DOCUMENT_TYPE_NODE) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_NODE_TYPE_ERR);
|
|
return;
|
|
}
|
|
|
|
if (!HasSameRoot(aNode)) {
|
|
// Return with no error
|
|
return;
|
|
}
|
|
|
|
if (mFrameSelection) {
|
|
mFrameSelection->PostReason(nsISelectionListener::SELECTALL_REASON);
|
|
}
|
|
|
|
// Chrome moves focus when aNode is outside of active editing host.
|
|
// So, we don't need to respect the limiter with this method.
|
|
SetStartAndEndInternal(InLimiter::eNo, RawRangeBoundary(&aNode, 0),
|
|
RawRangeBoundary(&aNode, aNode.GetChildCount()),
|
|
eDirNext, aRv);
|
|
}
|
|
|
|
bool Selection::ContainsNode(nsINode& aNode, bool aAllowPartial,
|
|
ErrorResult& aRv) {
|
|
nsresult rv;
|
|
if (mRanges.Length() == 0) {
|
|
return false;
|
|
}
|
|
|
|
// XXXbz this duplicates the GetNodeLength code in nsRange.cpp
|
|
uint32_t nodeLength;
|
|
auto* nodeAsCharData = CharacterData::FromNode(aNode);
|
|
if (nodeAsCharData) {
|
|
nodeLength = nodeAsCharData->TextLength();
|
|
} else {
|
|
nodeLength = aNode.GetChildCount();
|
|
}
|
|
|
|
nsTArray<nsRange*> overlappingRanges;
|
|
rv = GetRangesForIntervalArray(&aNode, 0, &aNode, nodeLength, false,
|
|
&overlappingRanges);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
return false;
|
|
}
|
|
if (overlappingRanges.Length() == 0) return false; // no ranges overlap
|
|
|
|
// if the caller said partial intersections are OK, we're done
|
|
if (aAllowPartial) {
|
|
return true;
|
|
}
|
|
|
|
// text nodes always count as inside
|
|
if (nodeAsCharData) {
|
|
return true;
|
|
}
|
|
|
|
// The caller wants to know if the node is entirely within the given range,
|
|
// so we have to check all intersecting ranges.
|
|
for (uint32_t i = 0; i < overlappingRanges.Length(); i++) {
|
|
bool nodeStartsBeforeRange, nodeEndsAfterRange;
|
|
if (NS_SUCCEEDED(RangeUtils::CompareNodeToRange(
|
|
&aNode, overlappingRanges[i], &nodeStartsBeforeRange,
|
|
&nodeEndsAfterRange))) {
|
|
if (!nodeStartsBeforeRange && !nodeEndsAfterRange) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
class PointInRectChecker : public nsLayoutUtils::RectCallback {
|
|
public:
|
|
explicit PointInRectChecker(const nsPoint& aPoint)
|
|
: mPoint(aPoint), mMatchFound(false) {}
|
|
|
|
void AddRect(const nsRect& aRect) override {
|
|
mMatchFound = mMatchFound || aRect.Contains(mPoint);
|
|
}
|
|
|
|
bool MatchFound() { return mMatchFound; }
|
|
|
|
private:
|
|
nsPoint mPoint;
|
|
bool mMatchFound;
|
|
};
|
|
|
|
bool Selection::ContainsPoint(const nsPoint& aPoint) {
|
|
if (IsCollapsed()) {
|
|
return false;
|
|
}
|
|
PointInRectChecker checker(aPoint);
|
|
for (uint32_t i = 0; i < RangeCount(); i++) {
|
|
nsRange* range = GetRangeAt(i);
|
|
nsRange::CollectClientRectsAndText(
|
|
&checker, nullptr, range, range->GetStartContainer(),
|
|
range->StartOffset(), range->GetEndContainer(), range->EndOffset(),
|
|
true, false);
|
|
if (checker.MatchFound()) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
nsPresContext* Selection::GetPresContext() const {
|
|
PresShell* presShell = GetPresShell();
|
|
return presShell ? presShell->GetPresContext() : nullptr;
|
|
}
|
|
|
|
PresShell* Selection::GetPresShell() const {
|
|
if (!mFrameSelection) {
|
|
return nullptr; // nothing to do
|
|
}
|
|
return mFrameSelection->GetPresShell();
|
|
}
|
|
|
|
Document* Selection::GetDocument() const {
|
|
PresShell* presShell = GetPresShell();
|
|
return presShell ? presShell->GetDocument() : nullptr;
|
|
}
|
|
|
|
nsPIDOMWindowOuter* Selection::GetWindow() const {
|
|
Document* document = GetDocument();
|
|
return document ? document->GetWindow() : nullptr;
|
|
}
|
|
|
|
HTMLEditor* Selection::GetHTMLEditor() const {
|
|
nsPresContext* presContext = GetPresContext();
|
|
if (!presContext) {
|
|
return nullptr;
|
|
}
|
|
return nsContentUtils::GetHTMLEditor(presContext);
|
|
}
|
|
|
|
nsIFrame* Selection::GetSelectionAnchorGeometry(SelectionRegion aRegion,
|
|
nsRect* aRect) {
|
|
if (!mFrameSelection) return nullptr; // nothing to do
|
|
|
|
NS_ENSURE_TRUE(aRect, nullptr);
|
|
|
|
aRect->SetRect(0, 0, 0, 0);
|
|
|
|
switch (aRegion) {
|
|
case nsISelectionController::SELECTION_ANCHOR_REGION:
|
|
case nsISelectionController::SELECTION_FOCUS_REGION:
|
|
return GetSelectionEndPointGeometry(aRegion, aRect);
|
|
case nsISelectionController::SELECTION_WHOLE_SELECTION:
|
|
break;
|
|
default:
|
|
return nullptr;
|
|
}
|
|
|
|
NS_ASSERTION(aRegion == nsISelectionController::SELECTION_WHOLE_SELECTION,
|
|
"should only be SELECTION_WHOLE_SELECTION here");
|
|
|
|
nsRect anchorRect;
|
|
nsIFrame* anchorFrame = GetSelectionEndPointGeometry(
|
|
nsISelectionController::SELECTION_ANCHOR_REGION, &anchorRect);
|
|
if (!anchorFrame) return nullptr;
|
|
|
|
nsRect focusRect;
|
|
nsIFrame* focusFrame = GetSelectionEndPointGeometry(
|
|
nsISelectionController::SELECTION_FOCUS_REGION, &focusRect);
|
|
if (!focusFrame) return nullptr;
|
|
|
|
NS_ASSERTION(anchorFrame->PresContext() == focusFrame->PresContext(),
|
|
"points of selection in different documents?");
|
|
// make focusRect relative to anchorFrame
|
|
focusRect += focusFrame->GetOffsetTo(anchorFrame);
|
|
|
|
aRect->UnionRectEdges(anchorRect, focusRect);
|
|
return anchorFrame;
|
|
}
|
|
|
|
nsIFrame* Selection::GetSelectionEndPointGeometry(SelectionRegion aRegion,
|
|
nsRect* aRect) {
|
|
if (!mFrameSelection) return nullptr; // nothing to do
|
|
|
|
NS_ENSURE_TRUE(aRect, nullptr);
|
|
|
|
aRect->SetRect(0, 0, 0, 0);
|
|
|
|
nsINode* node = nullptr;
|
|
uint32_t nodeOffset = 0;
|
|
nsIFrame* frame = nullptr;
|
|
|
|
switch (aRegion) {
|
|
case nsISelectionController::SELECTION_ANCHOR_REGION:
|
|
node = GetAnchorNode();
|
|
nodeOffset = AnchorOffset();
|
|
break;
|
|
case nsISelectionController::SELECTION_FOCUS_REGION:
|
|
node = GetFocusNode();
|
|
nodeOffset = FocusOffset();
|
|
break;
|
|
default:
|
|
return nullptr;
|
|
}
|
|
|
|
if (!node) return nullptr;
|
|
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(node);
|
|
NS_ENSURE_TRUE(content.get(), nullptr);
|
|
int32_t frameOffset = 0;
|
|
frame = mFrameSelection->GetFrameForNodeOffset(
|
|
content, nodeOffset, mFrameSelection->GetHint(), &frameOffset);
|
|
if (!frame) return nullptr;
|
|
|
|
// Figure out what node type we have, then get the
|
|
// appropriate rect for it's nodeOffset.
|
|
bool isText = node->IsText();
|
|
|
|
nsPoint pt(0, 0);
|
|
if (isText) {
|
|
nsIFrame* childFrame = nullptr;
|
|
frameOffset = 0;
|
|
nsresult rv = frame->GetChildFrameContainingOffset(
|
|
nodeOffset, mFrameSelection->GetHint(), &frameOffset, &childFrame);
|
|
if (NS_FAILED(rv)) return nullptr;
|
|
if (!childFrame) return nullptr;
|
|
|
|
frame = childFrame;
|
|
|
|
// Get the x coordinate of the offset into the text frame.
|
|
rv = GetCachedFrameOffset(frame, nodeOffset, pt);
|
|
if (NS_FAILED(rv)) return nullptr;
|
|
}
|
|
|
|
// Return the rect relative to the frame, with zero width.
|
|
if (isText) {
|
|
aRect->x = pt.x;
|
|
} else if (mFrameSelection->GetHint() == CARET_ASSOCIATE_BEFORE) {
|
|
// It's the frame's right edge we're interested in.
|
|
aRect->x = frame->GetRect().Width();
|
|
}
|
|
aRect->SetHeight(frame->GetRect().Height());
|
|
|
|
return frame;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
Selection::ScrollSelectionIntoViewEvent::Run() {
|
|
if (!mSelection) return NS_OK; // event revoked
|
|
|
|
int32_t flags = Selection::SCROLL_DO_FLUSH | Selection::SCROLL_SYNCHRONOUS;
|
|
|
|
Selection* sel = mSelection; // workaround to satisfy static analysis
|
|
RefPtr<Selection> kungFuDeathGrip(sel);
|
|
mSelection->mScrollEvent.Forget();
|
|
mSelection->ScrollIntoView(mRegion, mVerticalScroll, mHorizontalScroll,
|
|
mFlags | flags);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult Selection::PostScrollSelectionIntoViewEvent(SelectionRegion aRegion,
|
|
int32_t aFlags,
|
|
ScrollAxis aVertical,
|
|
ScrollAxis aHorizontal) {
|
|
// If we've already posted an event, revoke it and place a new one at the
|
|
// end of the queue to make sure that any new pending reflow events are
|
|
// processed before we scroll. This will insure that we scroll to the
|
|
// correct place on screen.
|
|
mScrollEvent.Revoke();
|
|
nsPresContext* presContext = GetPresContext();
|
|
NS_ENSURE_STATE(presContext);
|
|
nsRefreshDriver* refreshDriver = presContext->RefreshDriver();
|
|
NS_ENSURE_STATE(refreshDriver);
|
|
|
|
mScrollEvent = new ScrollSelectionIntoViewEvent(this, aRegion, aVertical,
|
|
aHorizontal, aFlags);
|
|
refreshDriver->AddEarlyRunner(mScrollEvent.get());
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::ScrollIntoView(int16_t aRegion, bool aIsSynchronous,
|
|
WhereToScroll aVPercent, WhereToScroll aHPercent,
|
|
ErrorResult& aRv) {
|
|
int32_t flags = aIsSynchronous ? Selection::SCROLL_SYNCHRONOUS : 0;
|
|
nsresult rv = ScrollIntoView(aRegion, ScrollAxis(aVPercent),
|
|
ScrollAxis(aHPercent), flags);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
}
|
|
}
|
|
|
|
nsresult Selection::ScrollIntoView(SelectionRegion aRegion,
|
|
ScrollAxis aVertical, ScrollAxis aHorizontal,
|
|
int32_t aFlags) {
|
|
if (!mFrameSelection) {
|
|
return NS_OK;
|
|
}
|
|
|
|
RefPtr<PresShell> presShell = mFrameSelection->GetPresShell();
|
|
if (!presShell || !presShell->GetDocument()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (mFrameSelection->GetBatching()) return NS_OK;
|
|
|
|
if (!(aFlags & Selection::SCROLL_SYNCHRONOUS))
|
|
return PostScrollSelectionIntoViewEvent(aRegion, aFlags, aVertical,
|
|
aHorizontal);
|
|
|
|
// From this point on, the presShell may get destroyed by the calls below, so
|
|
// hold on to it using a strong reference to ensure the safety of the
|
|
// accesses to frame pointers in the callees.
|
|
RefPtr<PresShell> kungFuDeathGrip(presShell);
|
|
|
|
// Now that text frame character offsets are always valid (though not
|
|
// necessarily correct), the worst that will happen if we don't flush here
|
|
// is that some callers might scroll to the wrong place. Those should
|
|
// either manually flush if they're in a safe position for it or use the
|
|
// async version of this method.
|
|
if (aFlags & Selection::SCROLL_DO_FLUSH) {
|
|
presShell->GetDocument()->FlushPendingNotifications(FlushType::Layout);
|
|
|
|
// Reget the presshell, since it might have been Destroy'ed.
|
|
presShell = mFrameSelection ? mFrameSelection->GetPresShell() : nullptr;
|
|
if (!presShell) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Scroll the selection region into view.
|
|
//
|
|
|
|
nsRect rect;
|
|
nsIFrame* frame = GetSelectionAnchorGeometry(aRegion, &rect);
|
|
if (!frame) return NS_ERROR_FAILURE;
|
|
|
|
// Scroll vertically to get the caret into view, but only if the container
|
|
// is perceived to be scrollable in that direction (i.e. there is a visible
|
|
// vertical scrollbar or the scroll range is at least one device pixel)
|
|
aVertical.mOnlyIfPerceivedScrollableDirection = true;
|
|
|
|
ScrollFlags scrollFlags = ScrollFlags::IgnoreMarginAndPadding;
|
|
if (aFlags & Selection::SCROLL_FIRST_ANCESTOR_ONLY) {
|
|
scrollFlags |= ScrollFlags::ScrollFirstAncestorOnly;
|
|
}
|
|
if (aFlags & Selection::SCROLL_OVERFLOW_HIDDEN) {
|
|
scrollFlags |= ScrollFlags::ScrollOverflowHidden;
|
|
}
|
|
|
|
presShell->ScrollFrameRectIntoView(frame, rect, aVertical, aHorizontal,
|
|
scrollFlags);
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::AddSelectionListener(nsISelectionListener* aNewListener) {
|
|
MOZ_ASSERT(aNewListener);
|
|
mSelectionListeners.AppendElement(aNewListener); // AddRefs
|
|
}
|
|
|
|
void Selection::RemoveSelectionListener(
|
|
nsISelectionListener* aListenerToRemove) {
|
|
mSelectionListeners.RemoveElement(aListenerToRemove); // Releases
|
|
}
|
|
|
|
Element* Selection::GetCommonEditingHostForAllRanges() {
|
|
Element* editingHost = nullptr;
|
|
for (RangeData& rangeData : mRanges) {
|
|
nsRange* range = rangeData.mRange;
|
|
MOZ_ASSERT(range);
|
|
nsINode* commonAncestorNode = range->GetCommonAncestor();
|
|
if (!commonAncestorNode || !commonAncestorNode->IsContent()) {
|
|
return nullptr;
|
|
}
|
|
nsIContent* commonAncestor = commonAncestorNode->AsContent();
|
|
Element* foundEditingHost = commonAncestor->GetEditingHost();
|
|
// Even when common ancestor is a non-editable element in a contenteditable
|
|
// element, we don't need to move focus to the contenteditable element
|
|
// because Chromium doesn't set focus to it.
|
|
if (!foundEditingHost) {
|
|
return nullptr;
|
|
}
|
|
if (!editingHost) {
|
|
editingHost = foundEditingHost;
|
|
continue;
|
|
}
|
|
if (editingHost == foundEditingHost) {
|
|
continue;
|
|
}
|
|
if (nsContentUtils::ContentIsDescendantOf(foundEditingHost, editingHost)) {
|
|
continue;
|
|
}
|
|
if (nsContentUtils::ContentIsDescendantOf(editingHost, foundEditingHost)) {
|
|
editingHost = foundEditingHost;
|
|
continue;
|
|
}
|
|
// editingHost and foundEditingHost are not a descendant of the other.
|
|
// So, there is no common editing host.
|
|
return nullptr;
|
|
}
|
|
return editingHost;
|
|
}
|
|
|
|
nsresult Selection::NotifySelectionListeners(bool aCalledByJS) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = aCalledByJS;
|
|
return NotifySelectionListeners();
|
|
}
|
|
|
|
nsresult Selection::NotifySelectionListeners() {
|
|
if (!mFrameSelection) return NS_OK; // nothing to do
|
|
|
|
// Our internal code should not move focus with using this class while
|
|
// this moves focus nor from selection listeners.
|
|
AutoRestore<bool> calledByJSRestorer(mCalledByJS);
|
|
mCalledByJS = false;
|
|
|
|
// When normal selection is changed by Selection API, we need to move focus
|
|
// if common ancestor of all ranges are in an editing host. Note that we
|
|
// don't need to move focus *to* the other focusable node because other
|
|
// browsers don't do it either.
|
|
if (mSelectionType == SelectionType::eNormal &&
|
|
calledByJSRestorer.SavedValue()) {
|
|
nsPIDOMWindowOuter* window = GetWindow();
|
|
Document* document = GetDocument();
|
|
// If the document is in design mode or doesn't have contenteditable
|
|
// element, we don't need to move focus.
|
|
if (window && document && !document->HasFlag(NODE_IS_EDITABLE) &&
|
|
GetHTMLEditor()) {
|
|
RefPtr<Element> newEditingHost = GetCommonEditingHostForAllRanges();
|
|
nsFocusManager* fm = nsFocusManager::GetFocusManager();
|
|
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
|
|
nsIContent* focusedContent = nsFocusManager::GetFocusedDescendant(
|
|
window, nsFocusManager::eOnlyCurrentWindow,
|
|
getter_AddRefs(focusedWindow));
|
|
nsCOMPtr<Element> focusedElement = do_QueryInterface(focusedContent);
|
|
// When all selected ranges are in an editing host, it should take focus.
|
|
// But otherwise, we shouldn't move focus since Chromium doesn't move
|
|
// focus but only selection range is updated.
|
|
if (newEditingHost && newEditingHost != focusedElement) {
|
|
MOZ_ASSERT(!newEditingHost->IsInNativeAnonymousSubtree());
|
|
// Note that don't steal focus from focused window if the window doesn't
|
|
// have focus. Additionally, although when an element gets focus, we
|
|
// usually scroll to the element, but in this case, we shouldn't do it
|
|
// because Chrome does not do so.
|
|
fm->SetFocus(newEditingHost, nsIFocusManager::FLAG_NOSWITCHFRAME |
|
|
nsIFocusManager::FLAG_NOSCROLL);
|
|
}
|
|
}
|
|
}
|
|
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
if (frameSelection->GetBatching()) {
|
|
frameSelection->SetDirty();
|
|
return NS_OK;
|
|
}
|
|
if (mSelectionListeners.IsEmpty()) {
|
|
// If there are no selection listeners, we're done!
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<Document> doc;
|
|
PresShell* presShell = GetPresShell();
|
|
if (presShell) {
|
|
doc = presShell->GetDocument();
|
|
}
|
|
|
|
// We've notified all selection listeners even when some of them are removed
|
|
// (and may be destroyed) during notifying one of them. Therefore, we should
|
|
// copy all listeners to the local variable first.
|
|
AutoTArray<nsCOMPtr<nsISelectionListener>, 5> selectionListeners(
|
|
mSelectionListeners);
|
|
|
|
int16_t reason = frameSelection->PopReason();
|
|
|
|
if (mNotifyAutoCopy) {
|
|
AutoCopyListener::OnSelectionChange(doc, *this, reason);
|
|
}
|
|
|
|
if (mAccessibleCaretEventHub) {
|
|
RefPtr<AccessibleCaretEventHub> hub(mAccessibleCaretEventHub);
|
|
hub->OnSelectionChange(doc, this, reason);
|
|
}
|
|
|
|
if (mSelectionChangeEventDispatcher) {
|
|
RefPtr<SelectionChangeEventDispatcher> dispatcher(
|
|
mSelectionChangeEventDispatcher);
|
|
dispatcher->OnSelectionChange(doc, this, reason);
|
|
}
|
|
for (auto& listener : selectionListeners) {
|
|
listener->NotifySelectionChanged(doc, this, reason);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::StartBatchChanges() {
|
|
if (mFrameSelection) {
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
frameSelection->StartBatchChanges();
|
|
}
|
|
}
|
|
|
|
void Selection::EndBatchChanges(int16_t aReason) {
|
|
if (mFrameSelection) {
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
frameSelection->EndBatchChanges(aReason);
|
|
}
|
|
}
|
|
|
|
void Selection::AddSelectionChangeBlocker() { mSelectionChangeBlockerCount++; }
|
|
|
|
void Selection::RemoveSelectionChangeBlocker() {
|
|
MOZ_ASSERT(mSelectionChangeBlockerCount > 0,
|
|
"mSelectionChangeBlockerCount has an invalid value - "
|
|
"maybe you have a mismatched RemoveSelectionChangeBlocker?");
|
|
mSelectionChangeBlockerCount--;
|
|
}
|
|
|
|
bool Selection::IsBlockingSelectionChangeEvents() const {
|
|
return mSelectionChangeBlockerCount > 0;
|
|
}
|
|
|
|
void Selection::DeleteFromDocument(ErrorResult& aRv) {
|
|
if (!mFrameSelection) return; // nothing to do
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
nsresult rv = frameSelection->DeleteFromDocument();
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
}
|
|
}
|
|
|
|
void Selection::Modify(const nsAString& aAlter, const nsAString& aDirection,
|
|
const nsAString& aGranularity, ErrorResult& aRv) {
|
|
// Silently exit if there's no selection or no focus node.
|
|
if (!mFrameSelection || !GetAnchorFocusRange() || !GetFocusNode()) {
|
|
return;
|
|
}
|
|
|
|
if (!aAlter.LowerCaseEqualsLiteral("move") &&
|
|
!aAlter.LowerCaseEqualsLiteral("extend")) {
|
|
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
|
|
return;
|
|
}
|
|
|
|
if (!aDirection.LowerCaseEqualsLiteral("forward") &&
|
|
!aDirection.LowerCaseEqualsLiteral("backward") &&
|
|
!aDirection.LowerCaseEqualsLiteral("left") &&
|
|
!aDirection.LowerCaseEqualsLiteral("right")) {
|
|
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
|
|
return;
|
|
}
|
|
|
|
// Line moves are always visual.
|
|
bool visual = aDirection.LowerCaseEqualsLiteral("left") ||
|
|
aDirection.LowerCaseEqualsLiteral("right") ||
|
|
aGranularity.LowerCaseEqualsLiteral("line");
|
|
|
|
bool forward = aDirection.LowerCaseEqualsLiteral("forward") ||
|
|
aDirection.LowerCaseEqualsLiteral("right");
|
|
|
|
bool extend = aAlter.LowerCaseEqualsLiteral("extend");
|
|
|
|
nsSelectionAmount amount;
|
|
if (aGranularity.LowerCaseEqualsLiteral("character")) {
|
|
amount = eSelectCluster;
|
|
} else if (aGranularity.LowerCaseEqualsLiteral("word")) {
|
|
amount = eSelectWordNoSpace;
|
|
} else if (aGranularity.LowerCaseEqualsLiteral("line")) {
|
|
amount = eSelectLine;
|
|
} else if (aGranularity.LowerCaseEqualsLiteral("lineboundary")) {
|
|
amount = forward ? eSelectEndLine : eSelectBeginLine;
|
|
} else if (aGranularity.LowerCaseEqualsLiteral("sentence") ||
|
|
aGranularity.LowerCaseEqualsLiteral("sentenceboundary") ||
|
|
aGranularity.LowerCaseEqualsLiteral("paragraph") ||
|
|
aGranularity.LowerCaseEqualsLiteral("paragraphboundary") ||
|
|
aGranularity.LowerCaseEqualsLiteral("documentboundary")) {
|
|
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
|
|
return;
|
|
} else {
|
|
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
|
|
return;
|
|
}
|
|
|
|
// If the anchor doesn't equal the focus and we try to move without first
|
|
// collapsing the selection, MoveCaret will collapse the selection and quit.
|
|
// To avoid this, we need to collapse the selection first.
|
|
nsresult rv = NS_OK;
|
|
if (!extend) {
|
|
nsINode* focusNode = GetFocusNode();
|
|
// We should have checked earlier that there was a focus node.
|
|
if (!focusNode) {
|
|
aRv.Throw(NS_ERROR_UNEXPECTED);
|
|
return;
|
|
}
|
|
uint32_t focusOffset = FocusOffset();
|
|
Collapse(focusNode, focusOffset);
|
|
}
|
|
|
|
// If the paragraph direction of the focused frame is right-to-left,
|
|
// we may have to swap the direction of movement.
|
|
nsIFrame* frame;
|
|
int32_t offset;
|
|
rv = GetPrimaryFrameForFocusNode(&frame, &offset, visual);
|
|
if (NS_SUCCEEDED(rv) && frame) {
|
|
nsBidiDirection paraDir = nsBidiPresUtils::ParagraphDirection(frame);
|
|
|
|
if (paraDir == NSBIDI_RTL && visual) {
|
|
if (amount == eSelectBeginLine) {
|
|
amount = eSelectEndLine;
|
|
forward = !forward;
|
|
} else if (amount == eSelectEndLine) {
|
|
amount = eSelectBeginLine;
|
|
forward = !forward;
|
|
}
|
|
}
|
|
}
|
|
|
|
// MoveCaret will return an error if it can't move in the specified
|
|
// direction, but we just ignore this error unless it's a line move, in which
|
|
// case we call nsISelectionController::CompleteMove to move the cursor to
|
|
// the beginning/end of the line.
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
rv = frameSelection->MoveCaret(
|
|
forward ? eDirNext : eDirPrevious, extend, amount,
|
|
visual ? nsFrameSelection::eVisual : nsFrameSelection::eLogical);
|
|
|
|
if (aGranularity.LowerCaseEqualsLiteral("line") && NS_FAILED(rv)) {
|
|
RefPtr<PresShell> presShell = frameSelection->GetPresShell();
|
|
if (!presShell) {
|
|
return;
|
|
}
|
|
presShell->CompleteMove(forward, extend);
|
|
}
|
|
}
|
|
|
|
void Selection::SetBaseAndExtentJS(nsINode& aAnchorNode, uint32_t aAnchorOffset,
|
|
nsINode& aFocusNode, uint32_t aFocusOffset,
|
|
ErrorResult& aRv) {
|
|
AutoRestore<bool> calledFromJSRestorer(mCalledByJS);
|
|
mCalledByJS = true;
|
|
SetBaseAndExtent(aAnchorNode, aAnchorOffset, aFocusNode, aFocusOffset, aRv);
|
|
}
|
|
|
|
void Selection::SetBaseAndExtentInternal(InLimiter aInLimiter,
|
|
const RawRangeBoundary& aAnchorRef,
|
|
const RawRangeBoundary& aFocusRef,
|
|
ErrorResult& aRv) {
|
|
if (!mFrameSelection) {
|
|
return;
|
|
}
|
|
|
|
if (NS_WARN_IF(!aAnchorRef.IsSet()) || NS_WARN_IF(!aFocusRef.IsSet())) {
|
|
aRv.Throw(NS_ERROR_INVALID_ARG);
|
|
return;
|
|
}
|
|
|
|
if (!HasSameRoot(*aAnchorRef.Container()) ||
|
|
!HasSameRoot(*aFocusRef.Container())) {
|
|
// Return with no error
|
|
return;
|
|
}
|
|
|
|
// Prevent "selectionchange" event temporarily because it should be fired
|
|
// after we set the direction.
|
|
// XXX If they are disconnected, shouldn't we return error before allocating
|
|
// new nsRange instance?
|
|
SelectionBatcher batch(this);
|
|
if (nsContentUtils::ComparePoints(aAnchorRef, aFocusRef) <= 0) {
|
|
SetStartAndEndInternal(aInLimiter, aAnchorRef, aFocusRef, eDirNext, aRv);
|
|
return;
|
|
}
|
|
|
|
SetStartAndEndInternal(aInLimiter, aFocusRef, aAnchorRef, eDirPrevious, aRv);
|
|
}
|
|
|
|
void Selection::SetStartAndEndInternal(InLimiter aInLimiter,
|
|
const RawRangeBoundary& aStartRef,
|
|
const RawRangeBoundary& aEndRef,
|
|
nsDirection aDirection,
|
|
ErrorResult& aRv) {
|
|
if (NS_WARN_IF(!aStartRef.IsSet()) || NS_WARN_IF(!aEndRef.IsSet())) {
|
|
aRv.Throw(NS_ERROR_INVALID_ARG);
|
|
return;
|
|
}
|
|
|
|
// Don't fire "selectionchange" event until everything done.
|
|
SelectionBatcher batch(this);
|
|
|
|
if (aInLimiter == InLimiter::eYes) {
|
|
if (!IsValidSelectionPoint(mFrameSelection, aStartRef.Container())) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
if (aStartRef.Container() != aEndRef.Container() &&
|
|
!IsValidSelectionPoint(mFrameSelection, aEndRef.Container())) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// If we're not called by JS, we can remove all ranges first. Then, we
|
|
// may be able to reuse one of current ranges for reducing the cost of
|
|
// nsRange allocation. Note that if this is called by
|
|
// SetBaseAndExtentJS(), when we fail to initialize new range, we
|
|
// shouldn't remove current ranges. Therefore, we need to check whether
|
|
// we're called by JS or internally.
|
|
if (!mCalledByJS && !mCachedRange) {
|
|
nsresult rv = RemoveAllRangesTemporarily();
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
aRv.Throw(rv);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// If there is cached range, we should reuse it for saving the allocation
|
|
// const (and some other cost in nsRange::DoSetRange()).
|
|
RefPtr<nsRange> newRange = std::move(mCachedRange);
|
|
|
|
// nsRange::SetStartAndEnd() and nsRange::Create() returns
|
|
// IndexSizeError if any offset is out of bounds.
|
|
if (newRange) {
|
|
nsresult rv = newRange->SetStartAndEnd(aStartRef, aEndRef);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
return;
|
|
}
|
|
} else {
|
|
newRange = nsRange::Create(aStartRef, aEndRef, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
RemoveAllRanges(aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
AddRange(*newRange, aRv);
|
|
if (aRv.Failed()) {
|
|
return;
|
|
}
|
|
|
|
// Adding a range may set 2 or more ranges if there are non-selectable
|
|
// contents only when this change is caused by a user operation. Therefore,
|
|
// we need to select frames with the result in such case.
|
|
if (mUserInitiated) {
|
|
RefPtr<nsPresContext> presContext = GetPresContext();
|
|
if (mRanges.Length() > 1 && presContext) {
|
|
SelectFramesInAllRanges(presContext);
|
|
}
|
|
}
|
|
|
|
SetDirection(aDirection);
|
|
}
|
|
|
|
/** SelectionLanguageChange modifies the cursor Bidi level after a change in
|
|
* keyboard direction
|
|
* @param aLangRTL is true if the new language is right-to-left or false if the
|
|
* new language is left-to-right
|
|
*/
|
|
nsresult Selection::SelectionLanguageChange(bool aLangRTL) {
|
|
if (!mFrameSelection) return NS_ERROR_NOT_INITIALIZED; // Can't do selection
|
|
|
|
RefPtr<nsFrameSelection> frameSelection = mFrameSelection;
|
|
|
|
// if the direction of the language hasn't changed, nothing to do
|
|
nsBidiLevel kbdBidiLevel = aLangRTL ? NSBIDI_RTL : NSBIDI_LTR;
|
|
if (kbdBidiLevel == frameSelection->mKbdBidiLevel) {
|
|
return NS_OK;
|
|
}
|
|
|
|
frameSelection->mKbdBidiLevel = kbdBidiLevel;
|
|
|
|
nsresult result;
|
|
nsIFrame* focusFrame = 0;
|
|
|
|
result = GetPrimaryFrameForFocusNode(&focusFrame, nullptr, false);
|
|
if (NS_FAILED(result)) {
|
|
return result;
|
|
}
|
|
if (!focusFrame) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
int32_t frameStart, frameEnd;
|
|
focusFrame->GetOffsets(frameStart, frameEnd);
|
|
RefPtr<nsPresContext> context = GetPresContext();
|
|
nsBidiLevel levelBefore, levelAfter;
|
|
if (!context) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsBidiLevel level = focusFrame->GetEmbeddingLevel();
|
|
int32_t focusOffset = static_cast<int32_t>(FocusOffset());
|
|
if ((focusOffset != frameStart) && (focusOffset != frameEnd))
|
|
// the cursor is not at a frame boundary, so the level of both the
|
|
// characters (logically) before and after the cursor is equal to the frame
|
|
// level
|
|
levelBefore = levelAfter = level;
|
|
else {
|
|
// the cursor is at a frame boundary, so use GetPrevNextBidiLevels to find
|
|
// the level of the characters before and after the cursor
|
|
nsCOMPtr<nsIContent> focusContent = do_QueryInterface(GetFocusNode());
|
|
nsPrevNextBidiLevels levels =
|
|
frameSelection->GetPrevNextBidiLevels(focusContent, focusOffset, false);
|
|
|
|
levelBefore = levels.mLevelBefore;
|
|
levelAfter = levels.mLevelAfter;
|
|
}
|
|
|
|
if (IS_SAME_DIRECTION(levelBefore, levelAfter)) {
|
|
// if cursor is between two characters with the same orientation, changing
|
|
// the keyboard language must toggle the cursor level between the level of
|
|
// the character with the lowest level (if the new language corresponds to
|
|
// the orientation of that character) and this level plus 1 (if the new
|
|
// language corresponds to the opposite orientation)
|
|
if ((level != levelBefore) && (level != levelAfter))
|
|
level = std::min(levelBefore, levelAfter);
|
|
if (IS_SAME_DIRECTION(level, kbdBidiLevel))
|
|
frameSelection->SetCaretBidiLevel(level);
|
|
else
|
|
frameSelection->SetCaretBidiLevel(level + 1);
|
|
} else {
|
|
// if cursor is between characters with opposite orientations, changing the
|
|
// keyboard language must change the cursor level to that of the adjacent
|
|
// character with the orientation corresponding to the new language.
|
|
if (IS_SAME_DIRECTION(levelBefore, kbdBidiLevel))
|
|
frameSelection->SetCaretBidiLevel(levelBefore);
|
|
else
|
|
frameSelection->SetCaretBidiLevel(levelAfter);
|
|
}
|
|
|
|
// The caret might have moved, so invalidate the desired position
|
|
// for future usages of up-arrow or down-arrow
|
|
frameSelection->InvalidateDesiredPos();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void Selection::SetColors(const nsAString& aForegroundColor,
|
|
const nsAString& aBackgroundColor,
|
|
const nsAString& aAltForegroundColor,
|
|
const nsAString& aAltBackgroundColor,
|
|
ErrorResult& aRv) {
|
|
if (mSelectionType != SelectionType::eFind) {
|
|
aRv.Throw(NS_ERROR_FAILURE);
|
|
return;
|
|
}
|
|
|
|
mCustomColors.reset(new SelectionCustomColors);
|
|
|
|
NS_NAMED_LITERAL_STRING(currentColorStr, "currentColor");
|
|
NS_NAMED_LITERAL_STRING(transparentStr, "transparent");
|
|
|
|
if (!aForegroundColor.Equals(currentColorStr)) {
|
|
nscolor foregroundColor;
|
|
nsAttrValue aForegroundColorValue;
|
|
aForegroundColorValue.ParseColor(aForegroundColor);
|
|
if (!aForegroundColorValue.GetColorValue(foregroundColor)) {
|
|
aRv.Throw(NS_ERROR_INVALID_ARG);
|
|
return;
|
|
}
|
|
mCustomColors->mForegroundColor = Some(foregroundColor);
|
|
} else {
|
|
mCustomColors->mForegroundColor = Nothing();
|
|
}
|
|
|
|
if (!aBackgroundColor.Equals(transparentStr)) {
|
|
nscolor backgroundColor;
|
|
nsAttrValue aBackgroundColorValue;
|
|
aBackgroundColorValue.ParseColor(aBackgroundColor);
|
|
if (!aBackgroundColorValue.GetColorValue(backgroundColor)) {
|
|
aRv.Throw(NS_ERROR_INVALID_ARG);
|
|
return;
|
|
}
|
|
mCustomColors->mBackgroundColor = Some(backgroundColor);
|
|
} else {
|
|
mCustomColors->mBackgroundColor = Nothing();
|
|
}
|
|
|
|
if (!aAltForegroundColor.Equals(currentColorStr)) {
|
|
nscolor altForegroundColor;
|
|
nsAttrValue aAltForegroundColorValue;
|
|
aAltForegroundColorValue.ParseColor(aAltForegroundColor);
|
|
if (!aAltForegroundColorValue.GetColorValue(altForegroundColor)) {
|
|
aRv.Throw(NS_ERROR_INVALID_ARG);
|
|
return;
|
|
}
|
|
mCustomColors->mAltForegroundColor = Some(altForegroundColor);
|
|
} else {
|
|
mCustomColors->mAltForegroundColor = Nothing();
|
|
}
|
|
|
|
if (!aAltBackgroundColor.Equals(transparentStr)) {
|
|
nscolor altBackgroundColor;
|
|
nsAttrValue aAltBackgroundColorValue;
|
|
aAltBackgroundColorValue.ParseColor(aAltBackgroundColor);
|
|
if (!aAltBackgroundColorValue.GetColorValue(altBackgroundColor)) {
|
|
aRv.Throw(NS_ERROR_INVALID_ARG);
|
|
return;
|
|
}
|
|
mCustomColors->mAltBackgroundColor = Some(altBackgroundColor);
|
|
} else {
|
|
mCustomColors->mAltBackgroundColor = Nothing();
|
|
}
|
|
}
|
|
|
|
void Selection::ResetColors(ErrorResult& aRv) { mCustomColors = nullptr; }
|
|
|
|
JSObject* Selection::WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) {
|
|
return mozilla::dom::Selection_Binding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
// AutoHideSelectionChanges
|
|
AutoHideSelectionChanges::AutoHideSelectionChanges(
|
|
const nsFrameSelection* aFrame)
|
|
: AutoHideSelectionChanges(
|
|
aFrame ? aFrame->GetSelection(SelectionType::eNormal) : nullptr) {}
|
|
|
|
bool Selection::HasSameRoot(nsINode& aNode) {
|
|
nsINode* root = aNode.SubtreeRoot();
|
|
Document* doc = GetParentObject();
|
|
return doc == root || (root && doc == root->GetComposedDoc());
|
|
}
|