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gecko-dev/layout/base/SelectionCarets.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Logging.h"
#include "SelectionCarets.h"
#include "gfxPrefs.h"
#include "nsBidiPresUtils.h"
#include "nsCanvasFrame.h"
#include "nsCaret.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsDocShell.h"
#include "nsDOMTokenList.h"
#include "nsFocusManager.h"
#include "nsFrame.h"
#include "nsGenericHTMLElement.h"
#include "nsIDocument.h"
#include "nsIDocShell.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNodeFilter.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsRect.h"
#include "nsView.h"
#include "mozilla/dom/DOMRect.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ScrollViewChangeEvent.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/TreeWalker.h"
#include "mozilla/Preferences.h"
#include "mozilla/TouchEvents.h"
#include "Layers.h"
#include "TouchCaret.h"
#include "nsFrameSelection.h"
using namespace mozilla;
using namespace mozilla::dom;
static PRLogModuleInfo* gSelectionCaretsLog;
static const char* kSelectionCaretsLogModuleName = "SelectionCarets";
// To enable all the SELECTIONCARETS_LOG print statements, set the environment
// variable NSPR_LOG_MODULES=SelectionCarets:5
#define SELECTIONCARETS_LOG(message, ...) \
MOZ_LOG(gSelectionCaretsLog, LogLevel::Debug, \
("SelectionCarets (%p): %s:%d : " message "\n", this, __FUNCTION__, \
__LINE__, ##__VA_ARGS__));
#define SELECTIONCARETS_LOG_STATIC(message, ...) \
MOZ_LOG(gSelectionCaretsLog, LogLevel::Debug, \
("SelectionCarets: %s:%d : " message "\n", __FUNCTION__, __LINE__, \
##__VA_ARGS__));
// We treat mouse/touch move as "REAL" move event once its move distance
// exceed this value, in CSS pixel.
static const int32_t kMoveStartTolerancePx = 5;
NS_IMPL_ISUPPORTS(SelectionCarets,
nsIReflowObserver,
nsISelectionListener,
nsIScrollObserver,
nsISupportsWeakReference)
/*static*/ int32_t SelectionCarets::sSelectionCaretsInflateSize = 0;
/*static*/ bool SelectionCarets::sSelectionCaretDetectsLongTap = true;
/*static*/ bool SelectionCarets::sCaretManagesAndroidActionbar = false;
/*static*/ bool SelectionCarets::sSelectionCaretObservesCompositions = false;
SelectionCarets::SelectionCarets(nsIPresShell* aPresShell)
: mPresShell(aPresShell)
, mActiveTouchId(-1)
, mCaretCenterToDownPointOffsetY(0)
, mDragMode(NONE)
, mUseAsyncPanZoom(false)
, mInAsyncPanZoomGesture(false)
, mEndCaretVisible(false)
, mStartCaretVisible(false)
, mSelectionVisibleInScrollFrames(true)
, mVisible(false)
, mActionBarViewID(0)
{
MOZ_ASSERT(NS_IsMainThread());
if (!gSelectionCaretsLog) {
gSelectionCaretsLog = PR_NewLogModule(kSelectionCaretsLogModuleName);
}
SELECTIONCARETS_LOG("Constructor, PresShell=%p", mPresShell);
static bool addedPref = false;
if (!addedPref) {
Preferences::AddIntVarCache(&sSelectionCaretsInflateSize,
"selectioncaret.inflatesize.threshold");
Preferences::AddBoolVarCache(&sSelectionCaretDetectsLongTap,
"selectioncaret.detects.longtap", true);
Preferences::AddBoolVarCache(&sCaretManagesAndroidActionbar,
"caret.manages-android-actionbar");
Preferences::AddBoolVarCache(&sSelectionCaretObservesCompositions,
"selectioncaret.observes.compositions");
addedPref = true;
}
}
void
SelectionCarets::Init()
{
nsPresContext* presContext = mPresShell->GetPresContext();
MOZ_ASSERT(presContext, "PresContext should be given in PresShell::Init()");
nsIDocShell* docShell = presContext->GetDocShell();
if (!docShell) {
return;
}
#if defined(MOZ_WIDGET_GONK)
mUseAsyncPanZoom = mPresShell->AsyncPanZoomEnabled();
#endif
docShell->AddWeakReflowObserver(this);
docShell->AddWeakScrollObserver(this);
mDocShell = static_cast<nsDocShell*>(docShell);
}
SelectionCarets::~SelectionCarets()
{
SELECTIONCARETS_LOG("Destructor");
MOZ_ASSERT(NS_IsMainThread());
mPresShell = nullptr;
}
void
SelectionCarets::Terminate()
{
nsRefPtr<nsDocShell> docShell(mDocShell.get());
if (docShell) {
docShell->RemoveWeakReflowObserver(this);
docShell->RemoveWeakScrollObserver(this);
}
if (mLongTapDetectorTimer) {
mLongTapDetectorTimer->Cancel();
mLongTapDetectorTimer = nullptr;
}
if (mScrollEndDetectorTimer) {
mScrollEndDetectorTimer->Cancel();
mScrollEndDetectorTimer = nullptr;
}
mPresShell = nullptr;
}
nsEventStatus
SelectionCarets::HandleEvent(WidgetEvent* aEvent)
{
WidgetMouseEvent *mouseEvent = aEvent->AsMouseEvent();
if (mouseEvent && mouseEvent->reason == WidgetMouseEvent::eSynthesized) {
return nsEventStatus_eIgnore;
}
WidgetTouchEvent *touchEvent = aEvent->AsTouchEvent();
LayoutDeviceIntPoint movePoint;
int32_t nowTouchId = -1;
if (touchEvent && !touchEvent->touches.IsEmpty()) {
// If touch happened, just grab event with same identifier
if (mActiveTouchId >= 0) {
for (uint32_t i = 0; i < touchEvent->touches.Length(); ++i) {
if (touchEvent->touches[i]->Identifier() == mActiveTouchId) {
movePoint = touchEvent->touches[i]->mRefPoint;
nowTouchId = touchEvent->touches[i]->Identifier();
break;
}
}
// not found, consume it
if (nowTouchId == -1) {
return nsEventStatus_eConsumeNoDefault;
}
} else {
movePoint = touchEvent->touches[0]->mRefPoint;
nowTouchId = touchEvent->touches[0]->Identifier();
}
} else if (mouseEvent) {
movePoint = mouseEvent->AsGUIEvent()->refPoint;
}
// XUL has no SelectionCarets elements.
if (!mPresShell->GetSelectionCaretsStartElement() ||
!mPresShell->GetSelectionCaretsEndElement()) {
return nsEventStatus_eIgnore;
}
// Get event coordinate relative to root frame
nsIFrame* rootFrame = mPresShell->GetRootFrame();
if (!rootFrame) {
return nsEventStatus_eIgnore;
}
nsPoint ptInRoot =
nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, movePoint, rootFrame);
if (aEvent->message == NS_TOUCH_START ||
(aEvent->message == NS_MOUSE_BUTTON_DOWN &&
mouseEvent->button == WidgetMouseEvent::eLeftButton)) {
// If having a active touch, ignore other touch down event
if (aEvent->message == NS_TOUCH_START && mActiveTouchId >= 0) {
return nsEventStatus_eConsumeNoDefault;
}
mActiveTouchId = nowTouchId;
mDownPoint = ptInRoot;
if (IsOnStartFrameInner(ptInRoot)) {
mDragMode = START_FRAME;
mCaretCenterToDownPointOffsetY = GetCaretYCenterPosition() - ptInRoot.y;
SetSelectionDirection(eDirPrevious);
SetSelectionDragState(true);
return nsEventStatus_eConsumeNoDefault;
} else if (IsOnEndFrameInner(ptInRoot)) {
mDragMode = END_FRAME;
mCaretCenterToDownPointOffsetY = GetCaretYCenterPosition() - ptInRoot.y;
SetSelectionDirection(eDirNext);
SetSelectionDragState(true);
return nsEventStatus_eConsumeNoDefault;
} else {
mDragMode = NONE;
mActiveTouchId = -1;
LaunchLongTapDetector();
}
} else if (aEvent->message == NS_TOUCH_END ||
aEvent->message == NS_TOUCH_CANCEL ||
aEvent->message == NS_MOUSE_BUTTON_UP) {
CancelLongTapDetector();
if (mDragMode != NONE) {
// Only care about same id
if (mActiveTouchId == nowTouchId) {
SetSelectionDragState(false);
mDragMode = NONE;
mActiveTouchId = -1;
}
return nsEventStatus_eConsumeNoDefault;
}
} else if (aEvent->message == NS_TOUCH_MOVE ||
aEvent->message == NS_MOUSE_MOVE) {
if (mDragMode == START_FRAME || mDragMode == END_FRAME) {
if (mActiveTouchId == nowTouchId) {
ptInRoot.y += mCaretCenterToDownPointOffsetY;
if (mDragMode == START_FRAME) {
if (ptInRoot.y > mDragDownYBoundary) {
ptInRoot.y = mDragDownYBoundary;
}
} else if (mDragMode == END_FRAME) {
if (ptInRoot.y < mDragUpYBoundary) {
ptInRoot.y = mDragUpYBoundary;
}
}
return DragSelection(ptInRoot);
}
return nsEventStatus_eConsumeNoDefault;
}
nsPoint delta = mDownPoint - ptInRoot;
if (NS_hypot(delta.x, delta.y) >
nsPresContext::AppUnitsPerCSSPixel() * kMoveStartTolerancePx) {
CancelLongTapDetector();
}
} else if (aEvent->message == NS_MOUSE_MOZLONGTAP) {
if (!mVisible || !sSelectionCaretDetectsLongTap) {
SELECTIONCARETS_LOG("SelectWord from NS_MOUSE_MOZLONGTAP");
mDownPoint = ptInRoot;
nsresult wordSelected = SelectWord();
if (NS_FAILED(wordSelected)) {
SELECTIONCARETS_LOG("SelectWord from NS_MOUSE_MOZLONGTAP failed!");
return nsEventStatus_eIgnore;
}
return nsEventStatus_eConsumeNoDefault;
}
}
return nsEventStatus_eIgnore;
}
static void
SetElementVisibility(dom::Element* aElement, bool aVisible)
{
if (!aElement) {
return;
}
ErrorResult err;
aElement->ClassList()->Toggle(NS_LITERAL_STRING("hidden"),
dom::Optional<bool>(!aVisible), err);
}
void
SelectionCarets::SetVisibility(bool aVisible)
{
if (!mPresShell) {
return;
}
if (mVisible == aVisible) {
SELECTIONCARETS_LOG("Set visibility %s, same as the old one",
(aVisible ? "shown" : "hidden"));
return;
}
if (!aVisible) {
mSelectionVisibleInScrollFrames = false;
}
mVisible = aVisible;
SELECTIONCARETS_LOG("Set visibility %s", (mVisible ? "shown" : "hidden"));
dom::Element* startElement = mPresShell->GetSelectionCaretsStartElement();
SetElementVisibility(startElement, mVisible && mStartCaretVisible);
dom::Element* endElement = mPresShell->GetSelectionCaretsEndElement();
SetElementVisibility(endElement, mVisible && mEndCaretVisible);
// Update the Android Actionbar visibility if in use.
if (sCaretManagesAndroidActionbar) {
TouchCaret::UpdateAndroidActionBarVisibility(mVisible, mActionBarViewID);
}
}
void
SelectionCarets::SetStartFrameVisibility(bool aVisible)
{
mStartCaretVisible = aVisible;
SELECTIONCARETS_LOG("Set start frame visibility %s",
(mStartCaretVisible ? "shown" : "hidden"));
dom::Element* element = mPresShell->GetSelectionCaretsStartElement();
SetElementVisibility(element, mVisible && mStartCaretVisible);
}
void
SelectionCarets::SetEndFrameVisibility(bool aVisible)
{
mEndCaretVisible = aVisible;
SELECTIONCARETS_LOG("Set end frame visibility %s",
(mEndCaretVisible ? "shown" : "hidden"));
dom::Element* element = mPresShell->GetSelectionCaretsEndElement();
SetElementVisibility(element, mVisible && mEndCaretVisible);
}
void
SelectionCarets::SetTilted(bool aIsTilt)
{
dom::Element* startElement = mPresShell->GetSelectionCaretsStartElement();
dom::Element* endElement = mPresShell->GetSelectionCaretsEndElement();
if (!startElement || !endElement) {
return;
}
SELECTIONCARETS_LOG("Set tilted selection carets %s",
(aIsTilt ? "enabled" : "disabled"));
ErrorResult err;
startElement->ClassList()->Toggle(NS_LITERAL_STRING("tilt"),
dom::Optional<bool>(aIsTilt), err);
endElement->ClassList()->Toggle(NS_LITERAL_STRING("tilt"),
dom::Optional<bool>(aIsTilt), err);
}
static void
SetCaretDirection(dom::Element* aElement, bool aIsRight)
{
MOZ_ASSERT(aElement);
ErrorResult err;
if (aIsRight) {
aElement->ClassList()->Add(NS_LITERAL_STRING("moz-selectioncaret-right"), err);
aElement->ClassList()->Remove(NS_LITERAL_STRING("moz-selectioncaret-left"), err);
} else {
aElement->ClassList()->Add(NS_LITERAL_STRING("moz-selectioncaret-left"), err);
aElement->ClassList()->Remove(NS_LITERAL_STRING("moz-selectioncaret-right"), err);
}
}
static nsIFrame*
FindFirstNodeWithFrame(nsIDocument* aDocument,
nsRange* aRange,
nsFrameSelection* aFrameSelection,
bool aBackward,
int& aOutOffset)
{
if (!aDocument || !aRange || !aFrameSelection) {
return nullptr;
}
nsCOMPtr<nsINode> startNode =
do_QueryInterface(aBackward ? aRange->GetEndParent() : aRange->GetStartParent());
nsCOMPtr<nsINode> endNode =
do_QueryInterface(aBackward ? aRange->GetStartParent() : aRange->GetEndParent());
int32_t offset = aBackward ? aRange->EndOffset() : aRange->StartOffset();
nsCOMPtr<nsIContent> startContent = do_QueryInterface(startNode);
CaretAssociationHint hintStart =
aBackward ? CARET_ASSOCIATE_BEFORE : CARET_ASSOCIATE_AFTER;
nsIFrame* startFrame = aFrameSelection->GetFrameForNodeOffset(startContent,
offset,
hintStart,
&aOutOffset);
if (startFrame) {
return startFrame;
}
ErrorResult err;
nsRefPtr<dom::TreeWalker> walker =
aDocument->CreateTreeWalker(*startNode,
nsIDOMNodeFilter::SHOW_ALL,
nullptr,
err);
if (!walker) {
return nullptr;
}
startFrame = startContent ? startContent->GetPrimaryFrame() : nullptr;
while (!startFrame && startNode != endNode) {
if (aBackward) {
startNode = walker->PreviousNode(err);
} else {
startNode = walker->NextNode(err);
}
if (!startNode) {
break;
}
startContent = do_QueryInterface(startNode);
startFrame = startContent ? startContent->GetPrimaryFrame() : nullptr;
}
return startFrame;
}
void
SelectionCarets::UpdateSelectionCarets()
{
if (!mPresShell) {
return;
}
nsRefPtr<dom::Selection> selection = GetSelection();
if (!selection) {
SELECTIONCARETS_LOG("Cannot get selection!");
SetVisibility(false);
return;
}
if (selection->IsCollapsed()) {
SELECTIONCARETS_LOG("Selection is collapsed!");
SetVisibility(false);
return;
}
int32_t rangeCount = selection->RangeCount();
nsRefPtr<nsRange> firstRange = selection->GetRangeAt(0);
nsRefPtr<nsRange> lastRange = selection->GetRangeAt(rangeCount - 1);
mPresShell->FlushPendingNotifications(Flush_Layout);
nsIFrame* rootFrame = mPresShell->GetRootFrame();
if (!rootFrame) {
SetVisibility(false);
return;
}
// Check start and end frame is rtl or ltr text
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
if (!fs) {
SetVisibility(false);
return;
}
int32_t startOffset;
nsIFrame* startFrame = FindFirstNodeWithFrame(mPresShell->GetDocument(),
firstRange, fs, false, startOffset);
int32_t endOffset;
nsIFrame* endFrame = FindFirstNodeWithFrame(mPresShell->GetDocument(),
lastRange, fs, true, endOffset);
if (!startFrame || !endFrame) {
SetVisibility(false);
return;
}
// Check if startFrame is after endFrame.
if (nsLayoutUtils::CompareTreePosition(startFrame, endFrame) > 0) {
SetVisibility(false);
return;
}
// If the selection is not visible, we should dispatch a event.
nsIFrame* commonAncestorFrame =
nsLayoutUtils::FindNearestCommonAncestorFrame(startFrame, endFrame);
nsRect selectionRectInRootFrame = nsContentUtils::GetSelectionBoundingRect(selection);
nsRect selectionRectInCommonAncestorFrame = selectionRectInRootFrame;
nsLayoutUtils::TransformRect(rootFrame, commonAncestorFrame,
selectionRectInCommonAncestorFrame);
mSelectionVisibleInScrollFrames =
nsLayoutUtils::IsRectVisibleInScrollFrames(commonAncestorFrame,
selectionRectInCommonAncestorFrame);
SELECTIONCARETS_LOG("Selection visibility %s",
(mSelectionVisibleInScrollFrames ? "shown" : "hidden"));
nsRect firstRectInStartFrame =
nsCaret::GetGeometryForFrame(startFrame, startOffset, nullptr);
nsRect lastRectInEndFrame =
nsCaret::GetGeometryForFrame(endFrame, endOffset, nullptr);
bool startFrameVisible =
nsLayoutUtils::IsRectVisibleInScrollFrames(startFrame, firstRectInStartFrame);
bool endFrameVisible =
nsLayoutUtils::IsRectVisibleInScrollFrames(endFrame, lastRectInEndFrame);
nsRect firstRectInRootFrame = firstRectInStartFrame;
nsRect lastRectInRootFrame = lastRectInEndFrame;
nsLayoutUtils::TransformRect(startFrame, rootFrame, firstRectInRootFrame);
nsLayoutUtils::TransformRect(endFrame, rootFrame, lastRectInRootFrame);
SetStartFrameVisibility(startFrameVisible);
SetEndFrameVisibility(endFrameVisible);
SetStartFramePos(firstRectInRootFrame);
SetEndFramePos(lastRectInRootFrame);
SetVisibility(true);
// Use half of the first(last) rect as the dragup(dragdown) boundary
mDragUpYBoundary =
(firstRectInRootFrame.BottomLeft().y + firstRectInRootFrame.TopLeft().y) / 2;
mDragDownYBoundary =
(lastRectInRootFrame.BottomRight().y + lastRectInRootFrame.TopRight().y) / 2;
nsRect rectStart = GetStartFrameRect();
nsRect rectEnd = GetEndFrameRect();
bool isTilt = rectStart.Intersects(rectEnd);
if (isTilt) {
SetCaretDirection(mPresShell->GetSelectionCaretsStartElement(), rectStart.x > rectEnd.x);
SetCaretDirection(mPresShell->GetSelectionCaretsEndElement(), rectStart.x <= rectEnd.x);
}
SetTilted(isTilt);
}
nsresult
SelectionCarets::SelectWord()
{
if (!mPresShell) {
return NS_ERROR_UNEXPECTED;
}
nsIFrame* rootFrame = mPresShell->GetRootFrame();
if (!rootFrame) {
return NS_ERROR_NOT_AVAILABLE;
}
// Find content offsets for mouse down point
nsIFrame *ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, mDownPoint,
nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC);
if (!ptFrame) {
return NS_ERROR_FAILURE;
}
bool selectable;
ptFrame->IsSelectable(&selectable, nullptr);
if (!selectable) {
SELECTIONCARETS_LOG(" frame %p is not selectable", ptFrame);
return NS_ERROR_FAILURE;
}
nsPoint ptInFrame = mDownPoint;
nsLayoutUtils::TransformPoint(rootFrame, ptFrame, ptInFrame);
nsIFrame* currFrame = ptFrame;
nsIContent* newFocusContent = nullptr;
while (currFrame) {
int32_t tabIndexUnused = 0;
if (currFrame->IsFocusable(&tabIndexUnused, true)) {
newFocusContent = currFrame->GetContent();
nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(newFocusContent));
if (domElement)
break;
}
currFrame = currFrame->GetParent();
}
// If target frame is focusable, we should move focus to it. If target frame
// isn't focusable, and our previous focused content is editable, we should
// clear focus.
nsFocusManager* fm = nsFocusManager::GetFocusManager();
nsIContent* editingHost = ptFrame->GetContent()->GetEditingHost();
if (newFocusContent && currFrame) {
nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(newFocusContent));
fm->SetFocus(domElement,0);
if (editingHost && !nsContentUtils::HasNonEmptyTextContent(
editingHost, nsContentUtils::eRecurseIntoChildren)) {
SELECTIONCARETS_LOG("Select a editable content %p with empty text",
editingHost);
// Long tap on the content with empty text, no action for
// selectioncarets but need to dispatch the taponcaret event
// to support the short cut mode
DispatchSelectionStateChangedEvent(GetSelection(),
SelectionState::Taponcaret);
return NS_OK;
}
} else {
nsIContent* focusedContent = GetFocusedContent();
if (focusedContent) {
// Clear focus if content was editable element, or contentEditable.
nsGenericHTMLElement* focusedGeneric =
nsGenericHTMLElement::FromContent(focusedContent);
if (focusedContent->GetTextEditorRootContent() ||
(focusedGeneric && focusedGeneric->IsContentEditable())) {
nsIDOMWindow* win = mPresShell->GetDocument()->GetWindow();
if (win) {
fm->ClearFocus(win);
}
}
}
}
SetSelectionDragState(true);
nsFrame* frame = static_cast<nsFrame*>(ptFrame);
nsresult rs = frame->SelectByTypeAtPoint(mPresShell->GetPresContext(), ptInFrame,
eSelectWord, eSelectWord, 0);
#ifdef DEBUG_FRAME_DUMP
nsCString frameTag;
frame->ListTag(frameTag);
SELECTIONCARETS_LOG("Frame=%s, ptInFrame=(%d, %d)", frameTag.get(),
ptInFrame.x, ptInFrame.y);
#endif
SetSelectionDragState(false);
// Clear maintain selection otherwise we cannot select less than a word
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
if (fs) {
fs->MaintainSelection();
}
return rs;
}
/*
* If we're dragging start caret, we do not want to drag over previous
* character of end caret. Same as end caret. So we check if content offset
* exceed previous/next character of end/start caret base on aDragMode.
*/
static bool
CompareRangeWithContentOffset(nsRange* aRange,
nsFrameSelection* aSelection,
nsIFrame::ContentOffsets& aOffsets,
SelectionCarets::DragMode aDragMode)
{
MOZ_ASSERT(aDragMode != SelectionCarets::NONE);
nsINode* node = nullptr;
int32_t nodeOffset = 0;
CaretAssociationHint hint;
nsDirection dir;
if (aDragMode == SelectionCarets::START_FRAME) {
// Check previous character of end node offset
node = aRange->GetEndParent();
nodeOffset = aRange->EndOffset();
hint = CARET_ASSOCIATE_BEFORE;
dir = eDirPrevious;
} else {
// Check next character of start node offset
node = aRange->GetStartParent();
nodeOffset = aRange->StartOffset();
hint = CARET_ASSOCIATE_AFTER;
dir = eDirNext;
}
nsCOMPtr<nsIContent> content = do_QueryInterface(node);
int32_t offset = 0;
nsIFrame* theFrame =
aSelection->GetFrameForNodeOffset(content, nodeOffset, hint, &offset);
if (!theFrame) {
return false;
}
// Move one character forward/backward from point and get offset
nsPeekOffsetStruct pos(eSelectCluster,
dir,
offset,
nsPoint(0, 0),
true,
true, //limit on scrolled views
false,
false,
false);
nsresult rv = theFrame->PeekOffset(&pos);
if (NS_FAILED(rv)) {
pos.mResultContent = content;
pos.mContentOffset = nodeOffset;
}
// Compare with current point
int32_t result = nsContentUtils::ComparePoints(aOffsets.content,
aOffsets.StartOffset(),
pos.mResultContent,
pos.mContentOffset);
if ((aDragMode == SelectionCarets::START_FRAME && result == 1) ||
(aDragMode == SelectionCarets::END_FRAME && result == -1)) {
aOffsets.content = pos.mResultContent;
aOffsets.offset = pos.mContentOffset;
aOffsets.secondaryOffset = pos.mContentOffset;
}
return true;
}
nsEventStatus
SelectionCarets::DragSelection(const nsPoint &movePoint)
{
nsIFrame* rootFrame = mPresShell->GetRootFrame();
if (!rootFrame) {
return nsEventStatus_eConsumeNoDefault;
}
// Find out which content we point to
nsIFrame *ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, movePoint,
nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC);
if (!ptFrame) {
return nsEventStatus_eConsumeNoDefault;
}
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
if (!fs) {
return nsEventStatus_eConsumeNoDefault;
}
nsresult result;
nsIFrame *newFrame = nullptr;
nsPoint newPoint;
nsPoint ptInFrame = movePoint;
nsLayoutUtils::TransformPoint(rootFrame, ptFrame, ptInFrame);
result = fs->ConstrainFrameAndPointToAnchorSubtree(ptFrame, ptInFrame, &newFrame, newPoint);
if (NS_FAILED(result) || !newFrame) {
return nsEventStatus_eConsumeNoDefault;
}
bool selectable;
newFrame->IsSelectable(&selectable, nullptr);
if (!selectable) {
return nsEventStatus_eConsumeNoDefault;
}
nsFrame::ContentOffsets offsets =
newFrame->GetContentOffsetsFromPoint(newPoint);
if (!offsets.content) {
return nsEventStatus_eConsumeNoDefault;
}
nsRefPtr<dom::Selection> selection = GetSelection();
if (!selection) {
return nsEventStatus_eConsumeNoDefault;
}
int32_t rangeCount = selection->RangeCount();
if (rangeCount <= 0) {
return nsEventStatus_eConsumeNoDefault;
}
// Limit the drag behavior not to cross the end of last selection range
// when drag the start frame and vice versa
nsRefPtr<nsRange> range = mDragMode == START_FRAME ?
selection->GetRangeAt(rangeCount - 1) : selection->GetRangeAt(0);
if (!CompareRangeWithContentOffset(range, fs, offsets, mDragMode)) {
return nsEventStatus_eConsumeNoDefault;
}
nsIFrame* anchorFrame;
selection->GetPrimaryFrameForAnchorNode(&anchorFrame);
if (!anchorFrame) {
return nsEventStatus_eConsumeNoDefault;
}
// Clear maintain selection so that we can drag caret freely.
fs->MaintainSelection(eSelectNoAmount);
// Move caret postion.
nsIFrame *scrollable =
nsLayoutUtils::GetClosestFrameOfType(anchorFrame, nsGkAtoms::scrollFrame);
nsWeakFrame weakScrollable = scrollable;
fs->HandleClick(offsets.content, offsets.StartOffset(),
offsets.EndOffset(),
true,
false,
offsets.associate);
if (!weakScrollable.IsAlive()) {
return nsEventStatus_eConsumeNoDefault;
}
// Scroll scrolled frame.
nsIScrollableFrame *saf = do_QueryFrame(scrollable);
nsIFrame *capturingFrame = saf->GetScrolledFrame();
nsPoint ptInScrolled = movePoint;
nsLayoutUtils::TransformPoint(rootFrame, capturingFrame, ptInScrolled);
fs->StartAutoScrollTimer(capturingFrame, ptInScrolled, TouchCaret::sAutoScrollTimerDelay);
UpdateSelectionCarets();
return nsEventStatus_eConsumeNoDefault;
}
nscoord
SelectionCarets::GetCaretYCenterPosition()
{
nsIFrame* rootFrame = mPresShell->GetRootFrame();
if (!rootFrame) {
return 0;
}
nsRefPtr<dom::Selection> selection = GetSelection();
if (!selection) {
return 0;
}
int32_t rangeCount = selection->RangeCount();
if (rangeCount <= 0) {
return 0;
}
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
if (!fs) {
return 0;
}
MOZ_ASSERT(mDragMode != NONE);
nsCOMPtr<nsIContent> node;
uint32_t nodeOffset;
if (mDragMode == START_FRAME) {
nsRefPtr<nsRange> range = selection->GetRangeAt(0);
node = do_QueryInterface(range->GetStartParent());
nodeOffset = range->StartOffset();
} else {
nsRefPtr<nsRange> range = selection->GetRangeAt(rangeCount - 1);
node = do_QueryInterface(range->GetEndParent());
nodeOffset = range->EndOffset();
}
int32_t offset;
CaretAssociationHint hint =
mDragMode == START_FRAME ? CARET_ASSOCIATE_AFTER : CARET_ASSOCIATE_BEFORE;
nsIFrame* theFrame =
fs->GetFrameForNodeOffset(node, nodeOffset, hint, &offset);
if (!theFrame) {
return 0;
}
nsRect frameRect = theFrame->GetRectRelativeToSelf();
nsLayoutUtils::TransformRect(theFrame, rootFrame, frameRect);
return frameRect.Center().y;
}
void
SelectionCarets::SetSelectionDragState(bool aState)
{
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
if (fs) {
fs->SetDragState(aState);
}
}
void
SelectionCarets::SetSelectionDirection(nsDirection aDir)
{
nsRefPtr<dom::Selection> selection = GetSelection();
if (selection) {
selection->AdjustAnchorFocusForMultiRange(aDir);
}
}
static void
SetFramePos(dom::Element* aElement, const nsRect& aCaretRect)
{
if (!aElement) {
return;
}
nsAutoString styleStr;
styleStr.AppendLiteral("left: ");
styleStr.AppendFloat(nsPresContext::AppUnitsToFloatCSSPixels(aCaretRect.Center().x));
styleStr.AppendLiteral("px; top: ");
styleStr.AppendFloat(nsPresContext::AppUnitsToFloatCSSPixels(aCaretRect.y));
styleStr.AppendLiteral("px; padding-top: ");
styleStr.AppendFloat(nsPresContext::AppUnitsToFloatCSSPixels(aCaretRect.height));
styleStr.AppendLiteral("px;");
SELECTIONCARETS_LOG_STATIC("Set style: %s",
NS_ConvertUTF16toUTF8(styleStr).get());
aElement->SetAttr(kNameSpaceID_None, nsGkAtoms::style, styleStr, true);
}
void
SelectionCarets::SetStartFramePos(const nsRect& aCaretRect)
{
SELECTIONCARETS_LOG("x=%d, y=%d, w=%d, h=%d",
aCaretRect.x, aCaretRect.y, aCaretRect.width, aCaretRect.height);
SetFramePos(mPresShell->GetSelectionCaretsStartElement(), aCaretRect);
}
void
SelectionCarets::SetEndFramePos(const nsRect& aCaretRect)
{
SELECTIONCARETS_LOG("x=%d, y=%d, w=%d, h=%d",
aCaretRect.x, aCaretRect.y, aCaretRect.width, aCaretRect.height);
SetFramePos(mPresShell->GetSelectionCaretsEndElement(), aCaretRect);
}
bool
SelectionCarets::IsOnStartFrameInner(const nsPoint& aPosition)
{
return mVisible &&
nsLayoutUtils::ContainsPoint(GetStartFrameRectInner(), aPosition,
SelectionCaretsInflateSize());
}
bool
SelectionCarets::IsOnEndFrameInner(const nsPoint& aPosition)
{
return mVisible &&
nsLayoutUtils::ContainsPoint(GetEndFrameRectInner(), aPosition,
SelectionCaretsInflateSize());
}
nsRect
SelectionCarets::GetStartFrameRect()
{
dom::Element* element = mPresShell->GetSelectionCaretsStartElement();
nsIFrame* rootFrame = mPresShell->GetRootFrame();
return nsLayoutUtils::GetRectRelativeToFrame(element, rootFrame);
}
nsRect
SelectionCarets::GetEndFrameRect()
{
dom::Element* element = mPresShell->GetSelectionCaretsEndElement();
nsIFrame* rootFrame = mPresShell->GetRootFrame();
return nsLayoutUtils::GetRectRelativeToFrame(element, rootFrame);
}
nsRect
SelectionCarets::GetStartFrameRectInner()
{
dom::Element* element = mPresShell->GetSelectionCaretsStartElement();
dom::Element* childElement = element->GetFirstElementChild();
nsIFrame* rootFrame = mPresShell->GetRootFrame();
return nsLayoutUtils::GetRectRelativeToFrame(childElement, rootFrame);
}
nsRect
SelectionCarets::GetEndFrameRectInner()
{
dom::Element* element = mPresShell->GetSelectionCaretsEndElement();
dom::Element* childElement = element->GetFirstElementChild();
nsIFrame* rootFrame = mPresShell->GetRootFrame();
return nsLayoutUtils::GetRectRelativeToFrame(childElement, rootFrame);
}
nsIContent*
SelectionCarets::GetFocusedContent()
{
nsFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
return fm->GetFocusedContent();
}
return nullptr;
}
Selection*
SelectionCarets::GetSelection()
{
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
if (fs) {
return fs->GetSelection(nsISelectionController::SELECTION_NORMAL);
}
return nullptr;
}
already_AddRefed<nsFrameSelection>
SelectionCarets::GetFrameSelection()
{
nsIContent* focusNode = GetFocusedContent();
if (focusNode) {
nsIFrame* focusFrame = focusNode->GetPrimaryFrame();
if (!focusFrame) {
return nullptr;
}
// Prevent us from touching the nsFrameSelection associated to other
// PresShell.
nsRefPtr<nsFrameSelection> fs = focusFrame->GetFrameSelection();
if (!fs || fs->GetShell() != mPresShell) {
return nullptr;
}
return fs.forget();
} else {
return mPresShell->FrameSelection();
}
}
static dom::Sequence<SelectionState>
GetSelectionStates(int16_t aReason)
{
dom::Sequence<SelectionState> states;
if (aReason & nsISelectionListener::DRAG_REASON) {
states.AppendElement(SelectionState::Drag, fallible);
}
if (aReason & nsISelectionListener::MOUSEDOWN_REASON) {
states.AppendElement(SelectionState::Mousedown, fallible);
}
if (aReason & nsISelectionListener::MOUSEUP_REASON) {
states.AppendElement(SelectionState::Mouseup, fallible);
}
if (aReason & nsISelectionListener::KEYPRESS_REASON) {
states.AppendElement(SelectionState::Keypress, fallible);
}
if (aReason & nsISelectionListener::SELECTALL_REASON) {
states.AppendElement(SelectionState::Selectall, fallible);
}
if (aReason & nsISelectionListener::COLLAPSETOSTART_REASON) {
states.AppendElement(SelectionState::Collapsetostart, fallible);
}
if (aReason & nsISelectionListener::COLLAPSETOEND_REASON) {
states.AppendElement(SelectionState::Collapsetoend, fallible);
}
return states;
}
void
SelectionCarets::DispatchCustomEvent(const nsAString& aEvent)
{
SELECTIONCARETS_LOG("dispatch %s event", NS_ConvertUTF16toUTF8(aEvent).get());
bool defaultActionEnabled = true;
nsIDocument* doc = mPresShell->GetDocument();
MOZ_ASSERT(doc);
nsContentUtils::DispatchTrustedEvent(doc,
ToSupports(doc),
aEvent,
true,
false,
&defaultActionEnabled);
}
void
SelectionCarets::DispatchSelectionStateChangedEvent(Selection* aSelection,
SelectionState aState)
{
dom::Sequence<SelectionState> state;
state.AppendElement(aState, fallible);
DispatchSelectionStateChangedEvent(aSelection, state);
}
void
SelectionCarets::DispatchSelectionStateChangedEvent(Selection* aSelection,
const Sequence<SelectionState>& aStates)
{
nsIDocument* doc = mPresShell->GetDocument();
MOZ_ASSERT(doc);
SelectionStateChangedEventInit init;
init.mBubbles = true;
if (aSelection) {
// XXX: Do we need to flush layout?
mPresShell->FlushPendingNotifications(Flush_Layout);
nsRect rect = nsContentUtils::GetSelectionBoundingRect(aSelection);
nsRefPtr<DOMRect>domRect = new DOMRect(ToSupports(doc));
domRect->SetLayoutRect(rect);
init.mBoundingClientRect = domRect;
init.mVisible = mSelectionVisibleInScrollFrames;
aSelection->Stringify(init.mSelectedText);
}
init.mStates = aStates;
nsRefPtr<SelectionStateChangedEvent> event =
SelectionStateChangedEvent::Constructor(doc, NS_LITERAL_STRING("mozselectionstatechanged"), init);
event->SetTrusted(true);
event->GetInternalNSEvent()->mFlags.mOnlyChromeDispatch = true;
bool ret;
doc->DispatchEvent(event, &ret);
}
void
SelectionCarets::NotifyBlur(bool aIsLeavingDocument)
{
SELECTIONCARETS_LOG("Send out the blur event");
SetVisibility(false);
if (aIsLeavingDocument) {
CancelLongTapDetector();
}
CancelScrollEndDetector();
mInAsyncPanZoomGesture = false;
DispatchSelectionStateChangedEvent(nullptr, SelectionState::Blur);
}
nsresult
SelectionCarets::NotifySelectionChanged(nsIDOMDocument* aDoc,
nsISelection* aSel,
int16_t aReason)
{
SELECTIONCARETS_LOG("aSel (%p), Reason=%d", aSel, aReason);
if (aSel != GetSelection()) {
SELECTIONCARETS_LOG("Return for selection mismatch!");
return NS_OK;
}
// Update SelectionCaret visibility.
if (sSelectionCaretObservesCompositions) {
// When observing selection change notifications generated for example
// by Android soft-keyboard compositions, we can only obtain visibility
// after mouse-up by long-tap, or final caret-drag.
if (!mVisible) {
if (aReason & nsISelectionListener::MOUSEUP_REASON) {
UpdateSelectionCarets();
}
} else {
// If already visible, we hide immediately for some known
// event-reasons: drag, keypress, or mouse down.
if (aReason & (nsISelectionListener::DRAG_REASON |
nsISelectionListener::KEYPRESS_REASON |
nsISelectionListener::MOUSEDOWN_REASON)) {
SetVisibility(false);
} else {
// Else we look further at the selection status, as currently
// style-composition changes don't provide reason codes.
UpdateSelectionCarets();
}
}
} else {
// Default logic, mainly employed by b2g, isn't aware of soft-keyboard
// selection change compositions.
if (!aReason || (aReason & (nsISelectionListener::DRAG_REASON |
nsISelectionListener::KEYPRESS_REASON |
nsISelectionListener::MOUSEDOWN_REASON))) {
SetVisibility(false);
} else {
UpdateSelectionCarets();
}
}
// Maybe trigger Android ActionBar updates.
if (mVisible && sCaretManagesAndroidActionbar) {
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->NotifyObservers(nullptr, "ActionBar:UpdateState", nullptr);
}
}
DispatchSelectionStateChangedEvent(static_cast<Selection*>(aSel),
GetSelectionStates(aReason));
return NS_OK;
}
static void
DispatchScrollViewChangeEvent(nsIPresShell *aPresShell, const dom::ScrollState aState)
{
nsCOMPtr<nsIDocument> doc = aPresShell->GetDocument();
if (doc) {
bool ret;
ScrollViewChangeEventInit detail;
detail.mBubbles = true;
detail.mCancelable = false;
detail.mState = aState;
nsRefPtr<ScrollViewChangeEvent> event =
ScrollViewChangeEvent::Constructor(doc, NS_LITERAL_STRING("scrollviewchange"), detail);
event->SetTrusted(true);
event->GetInternalNSEvent()->mFlags.mOnlyChromeDispatch = true;
doc->DispatchEvent(event, &ret);
}
}
void
SelectionCarets::AsyncPanZoomStarted()
{
if (mVisible) {
mInAsyncPanZoomGesture = true;
// Hide selection carets if not using ActionBar.
if (!sCaretManagesAndroidActionbar) {
SetVisibility(false);
}
SELECTIONCARETS_LOG("Dispatch scroll started");
DispatchScrollViewChangeEvent(mPresShell, dom::ScrollState::Started);
} else {
nsRefPtr<dom::Selection> selection = GetSelection();
if (selection && selection->RangeCount() && selection->IsCollapsed()) {
mInAsyncPanZoomGesture = true;
DispatchScrollViewChangeEvent(mPresShell, dom::ScrollState::Started);
}
}
}
void
SelectionCarets::AsyncPanZoomStopped()
{
if (mInAsyncPanZoomGesture) {
mInAsyncPanZoomGesture = false;
SELECTIONCARETS_LOG("Update selection carets after APZ is stopped!");
UpdateSelectionCarets();
// SelectionStateChangedEvent should be dispatched before ScrollViewChangeEvent.
DispatchSelectionStateChangedEvent(GetSelection(),
SelectionState::Updateposition);
SELECTIONCARETS_LOG("Dispatch scroll stopped");
DispatchScrollViewChangeEvent(mPresShell, dom::ScrollState::Stopped);
}
}
void
SelectionCarets::ScrollPositionChanged()
{
if (mVisible) {
if (!mUseAsyncPanZoom) {
// Hide selection carets if not using ActionBar.
if (!sCaretManagesAndroidActionbar) {
SetVisibility(false);
}
//TODO: handling scrolling for selection bubble when APZ is off
// Dispatch event to notify gaia to hide selection bubble.
// Positions will be updated when scroll is end, so no need to calculate
// and keep scroll positions here. An arbitrary (0, 0) is sent instead.
DispatchScrollViewChangeEvent(mPresShell, dom::ScrollState::Started);
SELECTIONCARETS_LOG("Launch scroll end detector");
LaunchScrollEndDetector();
} else {
if (!mInAsyncPanZoomGesture) {
UpdateSelectionCarets();
DispatchSelectionStateChangedEvent(GetSelection(),
SelectionState::Updateposition);
}
}
} else {
nsRefPtr<dom::Selection> selection = GetSelection();
if (selection && selection->RangeCount() && selection->IsCollapsed()) {
DispatchSelectionStateChangedEvent(selection,
SelectionState::Updateposition);
}
}
}
void
SelectionCarets::LaunchLongTapDetector()
{
if (!sSelectionCaretDetectsLongTap || mUseAsyncPanZoom) {
return;
}
if (!mLongTapDetectorTimer) {
mLongTapDetectorTimer = do_CreateInstance("@mozilla.org/timer;1");
}
MOZ_ASSERT(mLongTapDetectorTimer);
CancelLongTapDetector();
int32_t longTapDelay = gfxPrefs::UiClickHoldContextMenusDelay();
SELECTIONCARETS_LOG("Will fire long tap after %d ms", longTapDelay);
mLongTapDetectorTimer->InitWithFuncCallback(FireLongTap,
this,
longTapDelay,
nsITimer::TYPE_ONE_SHOT);
}
void
SelectionCarets::CancelLongTapDetector()
{
if (mUseAsyncPanZoom) {
return;
}
if (!mLongTapDetectorTimer) {
return;
}
SELECTIONCARETS_LOG("Cancel long tap detector!");
mLongTapDetectorTimer->Cancel();
}
/* static */void
SelectionCarets::FireLongTap(nsITimer* aTimer, void* aSelectionCarets)
{
nsRefPtr<SelectionCarets> self = static_cast<SelectionCarets*>(aSelectionCarets);
NS_PRECONDITION(aTimer == self->mLongTapDetectorTimer,
"Unexpected timer");
SELECTIONCARETS_LOG_STATIC("SelectWord from non-APZ");
nsresult wordSelected = self->SelectWord();
if (NS_FAILED(wordSelected)) {
SELECTIONCARETS_LOG_STATIC("SelectWord from non-APZ failed!");
}
}
void
SelectionCarets::LaunchScrollEndDetector()
{
if (!mScrollEndDetectorTimer) {
mScrollEndDetectorTimer = do_CreateInstance("@mozilla.org/timer;1");
}
MOZ_ASSERT(mScrollEndDetectorTimer);
SELECTIONCARETS_LOG("Will fire scroll end after %d ms",
TouchCaret::sScrollEndTimerDelay);
mScrollEndDetectorTimer->InitWithFuncCallback(FireScrollEnd,
this,
TouchCaret::sScrollEndTimerDelay,
nsITimer::TYPE_ONE_SHOT);
}
void
SelectionCarets::CancelScrollEndDetector()
{
if (!mScrollEndDetectorTimer) {
return;
}
SELECTIONCARETS_LOG("Cancel scroll end detector!");
mScrollEndDetectorTimer->Cancel();
}
/* static */void
SelectionCarets::FireScrollEnd(nsITimer* aTimer, void* aSelectionCarets)
{
nsRefPtr<SelectionCarets> self = static_cast<SelectionCarets*>(aSelectionCarets);
NS_PRECONDITION(aTimer == self->mScrollEndDetectorTimer,
"Unexpected timer");
SELECTIONCARETS_LOG_STATIC("Update selection carets!");
self->UpdateSelectionCarets();
self->DispatchSelectionStateChangedEvent(self->GetSelection(),
SelectionState::Updateposition);
}
NS_IMETHODIMP
SelectionCarets::Reflow(DOMHighResTimeStamp aStart, DOMHighResTimeStamp aEnd)
{
if (mVisible) {
SELECTIONCARETS_LOG("Update selection carets after reflow!");
UpdateSelectionCarets();
// We don't care selection state when we're at drag mode. We always hide
// bubble in drag mode. So, don't dispatch event here.
if (mDragMode == NONE) {
DispatchSelectionStateChangedEvent(GetSelection(),
SelectionState::Updateposition);
}
} else {
nsRefPtr<dom::Selection> selection = GetSelection();
if (selection && selection->RangeCount() && selection->IsCollapsed()) {
DispatchSelectionStateChangedEvent(selection,
SelectionState::Updateposition);
}
}
return NS_OK;
}
NS_IMETHODIMP
SelectionCarets::ReflowInterruptible(DOMHighResTimeStamp aStart,
DOMHighResTimeStamp aEnd)
{
return Reflow(aStart, aEnd);
}
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