зеркало из https://github.com/mozilla/gecko-dev.git
530 строки
20 KiB
C++
530 строки
20 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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#include "nsAutoPtr.h"
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#include "nsCOMPtr.h"
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#include "nsIServiceManager.h"
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#include "nsResizerFrame.h"
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#include "nsIContent.h"
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#include "mozilla/dom/Document.h"
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#include "nsGkAtoms.h"
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#include "nsNameSpaceManager.h"
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#include "nsPresContext.h"
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#include "nsFrameManager.h"
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#include "nsIDocShell.h"
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#include "nsIDocShellTreeOwner.h"
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#include "nsIBaseWindow.h"
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#include "nsPIDOMWindow.h"
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#include "mozilla/MouseEvents.h"
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#include "nsContentUtils.h"
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#include "nsMenuPopupFrame.h"
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#include "nsIScreenManager.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/MouseEventBinding.h"
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#include "nsError.h"
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#include "nsICSSDeclaration.h"
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#include "nsStyledElement.h"
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#include <algorithm>
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using namespace mozilla;
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//
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// NS_NewResizerFrame
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//
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// Creates a new Resizer frame and returns it
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//
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nsIFrame* NS_NewResizerFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle) {
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return new (aPresShell) nsResizerFrame(aStyle, aPresShell->GetPresContext());
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsResizerFrame)
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nsResizerFrame::nsResizerFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext)
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: nsTitleBarFrame(aStyle, aPresContext, kClassID) {}
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nsresult nsResizerFrame::HandleEvent(nsPresContext* aPresContext,
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WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) {
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NS_ENSURE_ARG_POINTER(aEventStatus);
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if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
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return NS_OK;
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}
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AutoWeakFrame weakFrame(this);
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bool doDefault = true;
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switch (aEvent->mMessage) {
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case eTouchStart:
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case eMouseDown: {
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if (aEvent->mClass == eTouchEventClass ||
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(aEvent->mClass == eMouseEventClass &&
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aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton)) {
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nsCOMPtr<nsIBaseWindow> window;
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nsIPresShell* presShell = aPresContext->GetPresShell();
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nsIContent* contentToResize =
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GetContentToResize(presShell, getter_AddRefs(window));
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if (contentToResize) {
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nsIFrame* frameToResize = contentToResize->GetPrimaryFrame();
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if (!frameToResize) break;
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// cache the content rectangle for the frame to resize
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// GetScreenRectInAppUnits returns the border box rectangle, so
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// adjust to get the desired content rectangle.
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nsRect rect = frameToResize->GetScreenRectInAppUnits();
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if (frameToResize->StylePosition()->mBoxSizing ==
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StyleBoxSizing::Content) {
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rect.Deflate(frameToResize->GetUsedBorderAndPadding());
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}
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mMouseDownRect = LayoutDeviceIntRect::FromAppUnitsToNearest(
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rect, aPresContext->AppUnitsPerDevPixel());
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doDefault = false;
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} else {
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// If there is no window, then resizing isn't allowed.
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if (!window) break;
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doDefault = false;
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// ask the widget implementation to begin a resize drag if it can
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Direction direction = GetDirection();
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nsresult rv = aEvent->mWidget->BeginResizeDrag(
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aEvent, direction.mHorizontal, direction.mVertical);
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// for native drags, don't set the fields below
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if (rv != NS_ERROR_NOT_IMPLEMENTED) break;
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// if there's no native resize support, we need to do window
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// resizing ourselves
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window->GetPositionAndSize(&mMouseDownRect.x, &mMouseDownRect.y,
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&mMouseDownRect.width,
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&mMouseDownRect.height);
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}
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// remember current mouse coordinates
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LayoutDeviceIntPoint refPoint;
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if (!GetEventPoint(aEvent, refPoint)) return NS_OK;
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mMouseDownPoint = refPoint + aEvent->mWidget->WidgetToScreenOffset();
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// we're tracking
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mTrackingMouseMove = true;
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nsIPresShell::SetCapturingContent(GetContent(), CAPTURE_IGNOREALLOWED);
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}
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} break;
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case eTouchEnd:
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case eMouseUp: {
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if (aEvent->mClass == eTouchEventClass ||
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(aEvent->mClass == eMouseEventClass &&
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aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton)) {
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// we're done tracking.
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mTrackingMouseMove = false;
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nsIPresShell::SetCapturingContent(nullptr, 0);
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doDefault = false;
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}
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} break;
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case eTouchMove:
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case eMouseMove: {
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if (mTrackingMouseMove) {
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nsCOMPtr<nsIBaseWindow> window;
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nsIPresShell* presShell = aPresContext->GetPresShell();
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nsCOMPtr<nsIContent> contentToResize =
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GetContentToResize(presShell, getter_AddRefs(window));
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// check if the returned content really is a menupopup
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nsMenuPopupFrame* menuPopupFrame = nullptr;
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if (contentToResize) {
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menuPopupFrame = do_QueryFrame(contentToResize->GetPrimaryFrame());
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}
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// both MouseMove and direction are negative when pointing to the
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// top and left, and positive when pointing to the bottom and right
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// retrieve the offset of the mousemove event relative to the mousedown.
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// The difference is how much the resize needs to be
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LayoutDeviceIntPoint refPoint;
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if (!GetEventPoint(aEvent, refPoint)) return NS_OK;
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LayoutDeviceIntPoint screenPoint =
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refPoint + aEvent->mWidget->WidgetToScreenOffset();
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LayoutDeviceIntPoint mouseMove(screenPoint - mMouseDownPoint);
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// Determine which direction to resize by checking the dir attribute.
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// For windows and menus, ensure that it can be resized in that
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// direction.
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Direction direction = GetDirection();
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if (window || menuPopupFrame) {
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if (menuPopupFrame) {
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menuPopupFrame->CanAdjustEdges(
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(direction.mHorizontal == -1) ? eSideLeft : eSideRight,
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(direction.mVertical == -1) ? eSideTop : eSideBottom,
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mouseMove);
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}
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} else if (!contentToResize) {
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break; // don't do anything if there's nothing to resize
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}
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LayoutDeviceIntRect rect = mMouseDownRect;
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// Check if there are any size constraints on this window.
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widget::SizeConstraints sizeConstraints;
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if (window) {
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nsCOMPtr<nsIWidget> widget;
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window->GetMainWidget(getter_AddRefs(widget));
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sizeConstraints = widget->GetSizeConstraints();
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}
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AdjustDimensions(&rect.x, &rect.width, sizeConstraints.mMinSize.width,
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sizeConstraints.mMaxSize.width, mouseMove.x,
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direction.mHorizontal);
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AdjustDimensions(&rect.y, &rect.height, sizeConstraints.mMinSize.height,
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sizeConstraints.mMaxSize.height, mouseMove.y,
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direction.mVertical);
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// Don't allow resizing a window or a popup past the edge of the screen,
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// so adjust the rectangle to fit within the available screen area.
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if (window) {
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nsCOMPtr<nsIScreen> screen;
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nsCOMPtr<nsIScreenManager> sm(
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do_GetService("@mozilla.org/gfx/screenmanager;1"));
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if (sm) {
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CSSIntRect frameRect = GetScreenRect();
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// ScreenForRect requires display pixels, so scale from device pix
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double scale;
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window->GetUnscaledDevicePixelsPerCSSPixel(&scale);
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sm->ScreenForRect(NSToIntRound(frameRect.x / scale),
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NSToIntRound(frameRect.y / scale), 1, 1,
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getter_AddRefs(screen));
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if (screen) {
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LayoutDeviceIntRect screenRect;
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screen->GetRect(&screenRect.x, &screenRect.y, &screenRect.width,
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&screenRect.height);
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rect.IntersectRect(rect, screenRect);
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}
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}
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} else if (menuPopupFrame) {
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nsRect frameRect = menuPopupFrame->GetScreenRectInAppUnits();
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nsIFrame* rootFrame = aPresContext->PresShell()->GetRootFrame();
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nsRect rootScreenRect = rootFrame->GetScreenRectInAppUnits();
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nsPopupLevel popupLevel = menuPopupFrame->PopupLevel();
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int32_t appPerDev = aPresContext->AppUnitsPerDevPixel();
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LayoutDeviceIntRect screenRect = menuPopupFrame->GetConstraintRect(
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LayoutDeviceIntRect::FromAppUnitsToNearest(frameRect, appPerDev),
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// round using ...ToInside as it's better to be a pixel too small
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// than be too large. If the popup is too large it could get
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// flipped to the opposite side of the anchor point while
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// resizing.
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LayoutDeviceIntRect::FromAppUnitsToInside(rootScreenRect,
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appPerDev),
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popupLevel);
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rect.IntersectRect(rect, screenRect);
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}
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if (contentToResize) {
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// convert the rectangle into css pixels. When changing the size in a
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// direction, don't allow the new size to be less that the resizer's
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// size. This ensures that content isn't resized too small as to make
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// the resizer invisible.
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nsRect appUnitsRect = ToAppUnits(rect.ToUnknownRect(),
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aPresContext->AppUnitsPerDevPixel());
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if (appUnitsRect.width < mRect.width && mouseMove.x)
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appUnitsRect.width = mRect.width;
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if (appUnitsRect.height < mRect.height && mouseMove.y)
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appUnitsRect.height = mRect.height;
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nsIntRect cssRect =
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appUnitsRect.ToInsidePixels(AppUnitsPerCSSPixel());
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LayoutDeviceIntRect oldRect;
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AutoWeakFrame weakFrame(menuPopupFrame);
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if (menuPopupFrame) {
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nsCOMPtr<nsIWidget> widget = menuPopupFrame->GetWidget();
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if (widget) oldRect = widget->GetScreenBounds();
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// convert the new rectangle into outer window coordinates
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LayoutDeviceIntPoint clientOffset = widget->GetClientOffset();
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rect.x -= clientOffset.x;
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rect.y -= clientOffset.y;
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}
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SizeInfo sizeInfo, originalSizeInfo;
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sizeInfo.width.AppendInt(cssRect.width);
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sizeInfo.height.AppendInt(cssRect.height);
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ResizeContent(contentToResize, direction, sizeInfo,
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&originalSizeInfo);
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MaybePersistOriginalSize(contentToResize, originalSizeInfo);
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// Move the popup to the new location unless it is anchored, since
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// the position shouldn't change. nsMenuPopupFrame::SetPopupPosition
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// will instead ensure that the popup's position is anchored at the
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// right place.
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if (weakFrame.IsAlive() &&
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(oldRect.x != rect.x || oldRect.y != rect.y) &&
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(!menuPopupFrame->IsAnchored() ||
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menuPopupFrame->PopupLevel() != ePopupLevelParent)) {
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CSSPoint cssPos =
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rect.TopLeft() / aPresContext->CSSToDevPixelScale();
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menuPopupFrame->MoveTo(RoundedToInt(cssPos), true);
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}
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} else {
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window->SetPositionAndSize(
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rect.x, rect.y, rect.width, rect.height,
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nsIBaseWindow::eRepaint); // do the repaint.
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}
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doDefault = false;
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}
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} break;
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case eMouseClick: {
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WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
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if (mouseEvent->IsLeftClickEvent()) {
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MouseClicked(mouseEvent);
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}
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break;
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}
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case eMouseDoubleClick:
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if (aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) {
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nsCOMPtr<nsIBaseWindow> window;
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nsIPresShell* presShell = aPresContext->GetPresShell();
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nsIContent* contentToResize =
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GetContentToResize(presShell, getter_AddRefs(window));
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if (contentToResize) {
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nsMenuPopupFrame* menuPopupFrame =
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do_QueryFrame(contentToResize->GetPrimaryFrame());
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if (menuPopupFrame)
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break; // Don't restore original sizing for menupopup frames until
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// we handle screen constraints here. (Bug 357725)
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RestoreOriginalSize(contentToResize);
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}
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}
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break;
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default:
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break;
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}
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if (!doDefault) *aEventStatus = nsEventStatus_eConsumeNoDefault;
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if (doDefault && weakFrame.IsAlive())
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return nsTitleBarFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
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return NS_OK;
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}
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nsIContent* nsResizerFrame::GetContentToResize(nsIPresShell* aPresShell,
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nsIBaseWindow** aWindow) {
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*aWindow = nullptr;
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nsAutoString elementid;
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mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::element,
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elementid);
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if (elementid.IsEmpty()) {
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// If the resizer is in a popup, resize the popup's widget, otherwise
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// resize the widget associated with the window.
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nsIFrame* popup = GetParent();
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while (popup) {
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nsMenuPopupFrame* popupFrame = do_QueryFrame(popup);
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if (popupFrame) {
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return popupFrame->GetContent();
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}
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popup = popup->GetParent();
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}
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// don't allow resizing windows in content shells
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nsCOMPtr<nsIDocShellTreeItem> dsti =
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aPresShell->GetPresContext()->GetDocShell();
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if (!dsti || dsti->ItemType() != nsIDocShellTreeItem::typeChrome) {
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// don't allow resizers in content shells, except for the viewport
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// scrollbar which doesn't have a parent
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nsIContent* nonNativeAnon =
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mContent->FindFirstNonChromeOnlyAccessContent();
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if (!nonNativeAnon || nonNativeAnon->GetParent()) {
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return nullptr;
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}
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}
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// get the document and the window - should this be cached?
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if (nsPIDOMWindowOuter* domWindow =
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aPresShell->GetDocument()->GetWindow()) {
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nsCOMPtr<nsIDocShell> docShell = domWindow->GetDocShell();
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if (docShell) {
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nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
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docShell->GetTreeOwner(getter_AddRefs(treeOwner));
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if (treeOwner) {
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CallQueryInterface(treeOwner, aWindow);
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}
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}
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}
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return nullptr;
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}
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if (elementid.EqualsLiteral("_parent")) {
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// return the parent, but skip over native anonymous content
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nsIContent* parent = mContent->GetParent();
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return parent ? parent->FindFirstNonChromeOnlyAccessContent() : nullptr;
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}
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return aPresShell->GetDocument()->GetElementById(elementid);
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}
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void nsResizerFrame::AdjustDimensions(int32_t* aPos, int32_t* aSize,
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int32_t aMinSize, int32_t aMaxSize,
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int32_t aMovement,
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int8_t aResizerDirection) {
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int32_t oldSize = *aSize;
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*aSize += aResizerDirection * aMovement;
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// use one as a minimum size or the element could disappear
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if (*aSize < 1) *aSize = 1;
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// Constrain the size within the minimum and maximum size.
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*aSize = std::max(aMinSize, std::min(aMaxSize, *aSize));
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// For left and top resizers, the window must be moved left by the same
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// amount that the window was resized.
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if (aResizerDirection == -1) *aPos += oldSize - *aSize;
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}
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/* static */ void nsResizerFrame::ResizeContent(nsIContent* aContent,
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const Direction& aDirection,
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const SizeInfo& aSizeInfo,
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SizeInfo* aOriginalSizeInfo) {
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// for XUL elements, just set the width and height attributes. For
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// other elements, set style.width and style.height
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if (aContent->IsXULElement()) {
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if (aOriginalSizeInfo) {
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aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::width,
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aOriginalSizeInfo->width);
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aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::height,
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aOriginalSizeInfo->height);
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}
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// only set the property if the element could have changed in that direction
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if (aDirection.mHorizontal) {
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aContent->AsElement()->SetAttr(kNameSpaceID_None, nsGkAtoms::width,
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aSizeInfo.width, true);
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}
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if (aDirection.mVertical) {
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aContent->AsElement()->SetAttr(kNameSpaceID_None, nsGkAtoms::height,
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aSizeInfo.height, true);
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}
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} else {
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nsCOMPtr<nsStyledElement> inlineStyleContent = do_QueryInterface(aContent);
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if (inlineStyleContent) {
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nsICSSDeclaration* decl = inlineStyleContent->Style();
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if (aOriginalSizeInfo) {
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decl->GetPropertyValue(NS_LITERAL_STRING("width"),
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aOriginalSizeInfo->width);
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decl->GetPropertyValue(NS_LITERAL_STRING("height"),
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aOriginalSizeInfo->height);
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}
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// only set the property if the element could have changed in that
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// direction
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if (aDirection.mHorizontal) {
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nsAutoString widthstr(aSizeInfo.width);
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if (!widthstr.IsEmpty() &&
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!Substring(widthstr, widthstr.Length() - 2, 2).EqualsLiteral("px"))
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widthstr.AppendLiteral("px");
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decl->SetProperty(NS_LITERAL_STRING("width"), widthstr, EmptyString());
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}
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if (aDirection.mVertical) {
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nsAutoString heightstr(aSizeInfo.height);
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if (!heightstr.IsEmpty() &&
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!Substring(heightstr, heightstr.Length() - 2, 2)
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.EqualsLiteral("px"))
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heightstr.AppendLiteral("px");
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decl->SetProperty(NS_LITERAL_STRING("height"), heightstr,
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EmptyString());
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}
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}
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}
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}
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/* static */ void nsResizerFrame::MaybePersistOriginalSize(
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nsIContent* aContent, const SizeInfo& aSizeInfo) {
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nsresult rv;
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aContent->GetProperty(nsGkAtoms::_moz_original_size, &rv);
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if (rv != NS_PROPTABLE_PROP_NOT_THERE) return;
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nsAutoPtr<SizeInfo> sizeInfo(new SizeInfo(aSizeInfo));
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rv = aContent->SetProperty(nsGkAtoms::_moz_original_size, sizeInfo.get(),
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nsINode::DeleteProperty<nsResizerFrame::SizeInfo>);
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if (NS_SUCCEEDED(rv)) sizeInfo.forget();
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}
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/* static */ void nsResizerFrame::RestoreOriginalSize(nsIContent* aContent) {
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nsresult rv;
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SizeInfo* sizeInfo = static_cast<SizeInfo*>(
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aContent->GetProperty(nsGkAtoms::_moz_original_size, &rv));
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if (NS_FAILED(rv)) return;
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NS_ASSERTION(sizeInfo, "We set a null sizeInfo!?");
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Direction direction = {1, 1};
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ResizeContent(aContent, direction, *sizeInfo, nullptr);
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aContent->DeleteProperty(nsGkAtoms::_moz_original_size);
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}
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|
|
|
/* returns a Direction struct containing the horizontal and vertical direction
|
|
*/
|
|
nsResizerFrame::Direction nsResizerFrame::GetDirection() {
|
|
static const Element::AttrValuesArray strings[] = {
|
|
// clang-format off
|
|
nsGkAtoms::topleft, nsGkAtoms::top, nsGkAtoms::topright,
|
|
nsGkAtoms::left, nsGkAtoms::right,
|
|
nsGkAtoms::bottomleft, nsGkAtoms::bottom, nsGkAtoms::bottomright,
|
|
nsGkAtoms::bottomstart, nsGkAtoms::bottomend,
|
|
nullptr
|
|
// clang-format on
|
|
};
|
|
|
|
static const Direction directions[] = {
|
|
// clang-format off
|
|
{-1, -1}, {0, -1}, {1, -1},
|
|
{-1, 0}, {1, 0},
|
|
{-1, 1}, {0, 1}, {1, 1},
|
|
{-1, 1}, {1, 1}
|
|
// clang-format on
|
|
};
|
|
|
|
if (!GetContent()) {
|
|
return directions[0]; // default: topleft
|
|
}
|
|
|
|
int32_t index = mContent->AsElement()->FindAttrValueIn(
|
|
kNameSpaceID_None, nsGkAtoms::dir, strings, eCaseMatters);
|
|
if (index < 0) {
|
|
return directions[0]; // default: topleft
|
|
}
|
|
|
|
if (index >= 8) {
|
|
// Directions 8 and higher are RTL-aware directions and should reverse the
|
|
// horizontal component if RTL.
|
|
WritingMode wm = GetWritingMode();
|
|
if (!(wm.IsVertical() ? wm.IsVerticalLR() : wm.IsBidiLTR())) {
|
|
Direction direction = directions[index];
|
|
direction.mHorizontal *= -1;
|
|
return direction;
|
|
}
|
|
}
|
|
|
|
return directions[index];
|
|
}
|
|
|
|
void nsResizerFrame::MouseClicked(WidgetMouseEvent* aEvent) {
|
|
// Execute the oncommand event handler.
|
|
nsContentUtils::DispatchXULCommand(
|
|
mContent, false, nullptr, nullptr, aEvent->IsControl(), aEvent->IsAlt(),
|
|
aEvent->IsShift(), aEvent->IsMeta(), aEvent->inputSource);
|
|
}
|