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5749b23267
See AccessibleCaretManager.h for the class description. AccessibleCaretManager uses two AccessibleCarets to unify the functionality provided by TouchCaret and SelectionCarets. It has "cursor" mode and "selection" mode, which corresponds to TouchCaret and SelectionCarets, respectively.
874 lines
23 KiB
C++
874 lines
23 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 "AccessibleCaretManager.h"
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#include "AccessibleCaret.h"
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#include "AccessibleCaretEventHub.h"
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#include "AccessibleCaretLogger.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/Selection.h"
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#include "mozilla/dom/TreeWalker.h"
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#include "nsCaret.h"
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#include "nsContentUtils.h"
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#include "nsFocusManager.h"
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#include "nsFrame.h"
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#include "nsFrameSelection.h"
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#include "nsGenericHTMLElement.h"
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namespace mozilla {
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#ifdef PR_LOGGING
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#undef AC_LOG
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#define AC_LOG(message, ...) \
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AC_LOG_BASE("AccessibleCaretManager (%p): " message, this, ##__VA_ARGS__);
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#undef AC_LOGV
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#define AC_LOGV(message, ...) \
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AC_LOGV_BASE("AccessibleCaretManager (%p): " message, this, ##__VA_ARGS__);
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#endif // #ifdef PR_LOGGING
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using namespace dom;
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using Appearance = AccessibleCaret::Appearance;
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using PositionChangedResult = AccessibleCaret::PositionChangedResult;
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AccessibleCaretManager::AccessibleCaretManager(nsIPresShell* aPresShell)
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: mPresShell(aPresShell)
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{
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if (mPresShell) {
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mFirstCaret = MakeUnique<AccessibleCaret>(mPresShell);
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mSecondCaret = MakeUnique<AccessibleCaret>(mPresShell);
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mCaretTimeoutTimer = do_CreateInstance("@mozilla.org/timer;1");
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}
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}
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AccessibleCaretManager::~AccessibleCaretManager()
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{
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CancelCaretTimeoutTimer();
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}
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nsresult
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AccessibleCaretManager::OnSelectionChanged(nsIDOMDocument* aDoc,
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nsISelection* aSel, int16_t aReason)
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{
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AC_LOG("aSel: %p, GetSelection(): %p, aReason: %d", aSel, GetSelection(),
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aReason);
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if (aSel != GetSelection()) {
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return NS_OK;
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}
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// Move the cursor by Javascript.
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if (aReason == nsISelectionListener::NO_REASON) {
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HideCarets();
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return NS_OK;
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}
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// Move cursor by keyboard.
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if (aReason & nsISelectionListener::KEYPRESS_REASON) {
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HideCarets();
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return NS_OK;
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}
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// Range will collapse after cutting or copying text.
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if (aReason & (nsISelectionListener::COLLAPSETOSTART_REASON |
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nsISelectionListener::COLLAPSETOEND_REASON)) {
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HideCarets();
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return NS_OK;
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}
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UpdateCarets();
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return NS_OK;
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}
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void
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AccessibleCaretManager::HideCarets()
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{
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if (mFirstCaret->IsLogicallyVisible() || mSecondCaret->IsLogicallyVisible()) {
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AC_LOG("%s", __FUNCTION__);
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mFirstCaret->SetAppearance(Appearance::None);
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mSecondCaret->SetAppearance(Appearance::None);
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CancelCaretTimeoutTimer();
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}
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}
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void
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AccessibleCaretManager::UpdateCarets()
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{
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mCaretMode = GetCaretMode();
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switch (mCaretMode) {
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case CaretMode::None:
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HideCarets();
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break;
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case CaretMode::Cursor:
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UpdateCaretsForCursorMode();
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break;
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case CaretMode::Selection:
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UpdateCaretsForSelectionMode();
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break;
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}
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}
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void
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AccessibleCaretManager::UpdateCaretsForCursorMode()
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{
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AC_LOG("%s, selection: %p", __FUNCTION__, GetSelection());
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nsRefPtr<nsCaret> caret = mPresShell->GetCaret();
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if (!caret || !caret->IsVisible()) {
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HideCarets();
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return;
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}
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nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
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Selection* selection = GetSelection();
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if (!fs || !selection) {
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HideCarets();
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return;
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}
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nsINode* focusNode = selection->GetFocusNode();
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nsIContent* focusContent = focusNode->AsContent();
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uint32_t focusOffset = selection->FocusOffset();
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nsIFrame* frame = nullptr;
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int32_t offset = 0;
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nsresult rv = nsCaret::GetCaretFrameForNodeOffset(
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fs, focusContent, focusOffset, fs->GetHint(), fs->GetCaretBidiLevel(),
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&frame, &offset);
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if (NS_FAILED(rv) || !frame) {
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HideCarets();
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return;
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}
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Element* editingHost = frame->GetContent()->GetEditingHost();
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if (!editingHost) {
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HideCarets();
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return;
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}
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// No need to consider whether the caret's position is out of scrollport.
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// According to the spec, we need to explicitly hide it after the scrolling is
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// ended.
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mFirstCaret->SetPosition(frame, offset);
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mFirstCaret->SetSelectionBarEnabled(false);
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if (nsContentUtils::HasNonEmptyTextContent(
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editingHost, nsContentUtils::eRecurseIntoChildren)) {
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mFirstCaret->SetAppearance(Appearance::Normal);
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LaunchCaretTimeoutTimer();
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} else {
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mFirstCaret->SetAppearance(Appearance::NormalNotShown);
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}
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mSecondCaret->SetAppearance(Appearance::None);
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}
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void
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AccessibleCaretManager::UpdateCaretsForSelectionMode()
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{
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AC_LOG("%s, selection: %p", __FUNCTION__, GetSelection());
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int32_t startOffset = 0;
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nsIFrame* startFrame = FindFirstNodeWithFrame(false, &startOffset);
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int32_t endOffset = 0;
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nsIFrame* endFrame = FindFirstNodeWithFrame(true, &endOffset);
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if (!startFrame || !endFrame ||
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nsLayoutUtils::CompareTreePosition(startFrame, endFrame) > 0) {
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HideCarets();
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return;
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}
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auto updateSingleCaret = [](AccessibleCaret * aCaret, nsIFrame * aFrame,
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int32_t aOffset)->PositionChangedResult
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{
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PositionChangedResult result = aCaret->SetPosition(aFrame, aOffset);
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aCaret->SetSelectionBarEnabled(true);
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switch (result) {
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case PositionChangedResult::NotChanged:
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// Do nothing
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break;
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case PositionChangedResult::Changed:
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aCaret->SetAppearance(Appearance::Normal);
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break;
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case PositionChangedResult::Invisible:
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aCaret->SetAppearance(Appearance::NormalNotShown);
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break;
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}
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return result;
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};
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PositionChangedResult firstCaretResult =
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updateSingleCaret(mFirstCaret.get(), startFrame, startOffset);
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PositionChangedResult secondCaretResult =
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updateSingleCaret(mSecondCaret.get(), endFrame, endOffset);
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if (firstCaretResult == PositionChangedResult::Changed ||
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secondCaretResult == PositionChangedResult::Changed) {
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// Flush layout to make the carets intersection correct.
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mPresShell->FlushPendingNotifications(Flush_Layout);
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}
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UpdateCaretsForTilt();
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}
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void
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AccessibleCaretManager::UpdateCaretsForTilt()
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{
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if (mFirstCaret->IsVisuallyVisible() && mSecondCaret->IsVisuallyVisible()) {
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if (mFirstCaret->Intersects(*mSecondCaret)) {
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if (mFirstCaret->LogicalPosition().x <=
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mSecondCaret->LogicalPosition().x) {
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mFirstCaret->SetAppearance(Appearance::Left);
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mSecondCaret->SetAppearance(Appearance::Right);
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} else {
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mFirstCaret->SetAppearance(Appearance::Right);
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mSecondCaret->SetAppearance(Appearance::Left);
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}
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} else {
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mFirstCaret->SetAppearance(Appearance::Normal);
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mSecondCaret->SetAppearance(Appearance::Normal);
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}
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}
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}
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nsresult
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AccessibleCaretManager::PressCaret(const nsPoint& aPoint)
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{
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nsresult rv = NS_ERROR_FAILURE;
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if (mFirstCaret->Contains(aPoint)) {
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mActiveCaret = mFirstCaret.get();
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SetSelectionDirection(eDirPrevious);
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} else if (mSecondCaret->Contains(aPoint)) {
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mActiveCaret = mSecondCaret.get();
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SetSelectionDirection(eDirNext);
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}
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if (mActiveCaret) {
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mOffsetYToCaretLogicalPosition =
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mActiveCaret->LogicalPosition().y - aPoint.y;
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SetSelectionDragState(true);
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CancelCaretTimeoutTimer();
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rv = NS_OK;
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}
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return rv;
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}
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nsresult
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AccessibleCaretManager::DragCaret(const nsPoint& aPoint)
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{
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MOZ_ASSERT(mActiveCaret);
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MOZ_ASSERT(GetCaretMode() != CaretMode::None);
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nsPoint point(aPoint.x, aPoint.y + mOffsetYToCaretLogicalPosition);
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DragCaretInternal(point);
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UpdateCarets();
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return NS_OK;
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}
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nsresult
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AccessibleCaretManager::ReleaseCaret()
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{
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MOZ_ASSERT(mActiveCaret);
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mActiveCaret = nullptr;
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SetSelectionDragState(false);
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LaunchCaretTimeoutTimer();
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return NS_OK;
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}
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nsresult
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AccessibleCaretManager::TapCaret(const nsPoint& aPoint)
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{
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MOZ_ASSERT(GetCaretMode() != CaretMode::None);
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nsresult rv = NS_ERROR_FAILURE;
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if (GetCaretMode() == CaretMode::Cursor) {
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rv = NS_OK;
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}
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return rv;
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}
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nsresult
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AccessibleCaretManager::SelectWordOrShortcut(const nsPoint& aPoint)
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{
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if (!mPresShell) {
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return NS_ERROR_UNEXPECTED;
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}
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nsIFrame* rootFrame = mPresShell->GetRootFrame();
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if (!rootFrame) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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// Find content offsets for mouse down point
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nsIFrame* ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, aPoint,
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nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC);
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if (!ptFrame) {
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return NS_ERROR_FAILURE;
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}
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bool selectable;
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ptFrame->IsSelectable(&selectable, nullptr);
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if (!selectable) {
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return NS_ERROR_FAILURE;
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}
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nsPoint ptInFrame = aPoint;
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nsLayoutUtils::TransformPoint(rootFrame, ptFrame, ptInFrame);
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nsIContent* editingHost = ptFrame->GetContent()->GetEditingHost();
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if (ChangeFocus(ptFrame) &&
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(editingHost && !nsContentUtils::HasNonEmptyTextContent(
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editingHost, nsContentUtils::eRecurseIntoChildren))) {
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// Content is empty. No need to select word.
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AC_LOG("%s, Cannot select word bacause content is empty", __FUNCTION__);
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return NS_OK;
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}
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nsresult rv = SelectWord(ptFrame, ptInFrame);
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UpdateCarets();
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return rv;
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}
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void
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AccessibleCaretManager::OnScrollStart()
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{
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AC_LOG("%s", __FUNCTION__);
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HideCarets();
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}
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void
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AccessibleCaretManager::OnScrollEnd()
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{
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if (mCaretMode != GetCaretMode()) {
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return;
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}
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if (GetCaretMode() == CaretMode::Cursor) {
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AC_LOG("%s: HideCarets()", __FUNCTION__);
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HideCarets();
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} else {
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AC_LOG("%s: UpdateCarets()", __FUNCTION__);
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UpdateCarets();
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}
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}
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void
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AccessibleCaretManager::OnScrolling()
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{
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if (mCaretMode != GetCaretMode()) {
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return;
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}
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if (GetCaretMode() == CaretMode::Cursor) {
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AC_LOG("%s: HideCarets()", __FUNCTION__);
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HideCarets();
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} else {
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AC_LOG("%s: UpdateCarets()", __FUNCTION__);
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UpdateCarets();
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}
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}
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void
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AccessibleCaretManager::OnScrollPositionChanged()
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{
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if (mCaretMode != GetCaretMode()) {
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return;
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}
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AC_LOG("%s: UpdateCarets()", __FUNCTION__);
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UpdateCarets();
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}
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void
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AccessibleCaretManager::OnReflow()
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{
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if (mCaretMode != GetCaretMode()) {
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return;
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}
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if (mFirstCaret->IsVisuallyVisible() || mSecondCaret->IsVisuallyVisible()) {
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AC_LOG("%s: UpdateCarets()", __FUNCTION__);
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UpdateCarets();
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}
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}
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void
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AccessibleCaretManager::OnBlur()
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{
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AC_LOG("%s: HideCarets()", __FUNCTION__);
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HideCarets();
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}
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void
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AccessibleCaretManager::OnKeyboardEvent()
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{
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if (GetCaretMode() == CaretMode::Cursor) {
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AC_LOG("%s: HideCarets()", __FUNCTION__);
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HideCarets();
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}
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}
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nsIContent*
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AccessibleCaretManager::GetFocusedContent() const
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{
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nsFocusManager* fm = nsFocusManager::GetFocusManager();
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MOZ_ASSERT(fm);
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return fm->GetFocusedContent();
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}
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Selection*
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AccessibleCaretManager::GetSelection() const
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{
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nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
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if (!fs) {
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return nullptr;
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}
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return fs->GetSelection(nsISelectionController::SELECTION_NORMAL);
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}
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already_AddRefed<nsFrameSelection>
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AccessibleCaretManager::GetFrameSelection() const
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{
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nsIContent* focusedContent = GetFocusedContent();
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if (focusedContent) {
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nsIFrame* focusFrame = focusedContent->GetPrimaryFrame();
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if (!focusFrame) {
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return nullptr;
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}
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// Prevent us from touching the nsFrameSelection associated with other
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// PresShell.
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nsRefPtr<nsFrameSelection> fs = focusFrame->GetFrameSelection();
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if (!fs || fs->GetShell() != mPresShell) {
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return nullptr;
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}
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return fs.forget();
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} else {
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// For non-editable content
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return mPresShell->FrameSelection();
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}
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}
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AccessibleCaretManager::CaretMode
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AccessibleCaretManager::GetCaretMode() const
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{
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Selection* selection = GetSelection();
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if (!selection) {
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return CaretMode::None;
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}
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uint32_t rangeCount = selection->RangeCount();
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if (rangeCount <= 0) {
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return CaretMode::None;
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}
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if (selection->IsCollapsed()) {
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return CaretMode::Cursor;
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}
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return CaretMode::Selection;
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}
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bool
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AccessibleCaretManager::ChangeFocus(nsIFrame* aFrame) const
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{
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nsIFrame* currFrame = aFrame;
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nsIContent* newFocusContent = nullptr;
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while (currFrame) {
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int32_t tabIndexUnused = 0;
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if (currFrame->IsFocusable(&tabIndexUnused, true)) {
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newFocusContent = currFrame->GetContent();
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nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(newFocusContent));
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if (domElement)
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break;
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}
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currFrame = currFrame->GetParent();
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}
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// If target frame is focusable, we should move focus to it. If target frame
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// isn't focusable, and our previous focused content is editable, we should
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// clear focus.
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nsFocusManager* fm = nsFocusManager::GetFocusManager();
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if (newFocusContent && currFrame) {
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nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(newFocusContent));
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fm->SetFocus(domElement, 0);
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} else {
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nsIContent* focusedContent = GetFocusedContent();
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if (focusedContent) {
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// Clear focus if content was editable element, or contentEditable.
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nsGenericHTMLElement* focusedGeneric =
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nsGenericHTMLElement::FromContent(focusedContent);
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if (focusedContent->GetTextEditorRootContent() ||
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(focusedGeneric && focusedGeneric->IsContentEditable())) {
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nsIDOMWindow* win = mPresShell->GetDocument()->GetWindow();
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if (win) {
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fm->ClearFocus(win);
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}
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}
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}
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}
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return (newFocusContent && currFrame);
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}
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nsresult
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AccessibleCaretManager::SelectWord(nsIFrame* aFrame, const nsPoint& aPoint) const
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{
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SetSelectionDragState(true);
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nsFrame* frame = static_cast<nsFrame*>(aFrame);
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nsresult rs = frame->SelectByTypeAtPoint(mPresShell->GetPresContext(), aPoint,
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eSelectWord, eSelectWord, 0);
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#ifdef DEBUG_FRAME_DUMP
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nsCString frameTag;
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frame->ListTag(frameTag);
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AC_LOG("Frame=%s, ptInFrame=(%d, %d)", frameTag.get(), aPoint.x, aPoint.y);
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#endif
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SetSelectionDragState(false);
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ClearMaintainedSelection();
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return rs;
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}
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void
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AccessibleCaretManager::SetSelectionDragState(bool aState) const
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{
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nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
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if (fs) {
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|
fs->SetDragState(aState);
|
|
}
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::SetSelectionDirection(nsDirection aDir) const
|
|
{
|
|
Selection* selection = GetSelection();
|
|
if (selection) {
|
|
selection->AdjustAnchorFocusForMultiRange(aDir);
|
|
}
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::ClearMaintainedSelection() const
|
|
{
|
|
// Selection made by double-clicking for example will maintain the original
|
|
// word selection. We should clear it so that we can drag caret freely.
|
|
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
|
|
if (fs) {
|
|
fs->MaintainSelection(eSelectNoAmount);
|
|
}
|
|
}
|
|
|
|
nsIFrame*
|
|
AccessibleCaretManager::FindFirstNodeWithFrame(bool aBackward,
|
|
int32_t* aOutOffset) const
|
|
{
|
|
if (!mPresShell) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsRefPtr<Selection> selection = GetSelection();
|
|
if (!selection) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
|
|
if (!fs) {
|
|
return nullptr;
|
|
}
|
|
|
|
uint32_t rangeCount = selection->RangeCount();
|
|
if (rangeCount <= 0) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsRange* range = selection->GetRangeAt(aBackward ? rangeCount - 1 : 0);
|
|
nsRefPtr<nsINode> startNode =
|
|
aBackward ? range->GetEndParent() : range->GetStartParent();
|
|
nsRefPtr<nsINode> endNode =
|
|
aBackward ? range->GetStartParent() : range->GetEndParent();
|
|
int32_t offset = aBackward ? range->EndOffset() : range->StartOffset();
|
|
nsCOMPtr<nsIContent> startContent = do_QueryInterface(startNode);
|
|
CaretAssociationHint hintStart =
|
|
aBackward ? CARET_ASSOCIATE_BEFORE : CARET_ASSOCIATE_AFTER;
|
|
nsIFrame* startFrame =
|
|
fs->GetFrameForNodeOffset(startContent, offset, hintStart, aOutOffset);
|
|
|
|
if (startFrame) {
|
|
return startFrame;
|
|
}
|
|
|
|
ErrorResult err;
|
|
nsRefPtr<TreeWalker> walker = mPresShell->GetDocument()->CreateTreeWalker(
|
|
*startNode, nsIDOMNodeFilter::SHOW_ALL, nullptr, err);
|
|
|
|
if (!walker) {
|
|
return nullptr;
|
|
}
|
|
|
|
startFrame = startContent ? startContent->GetPrimaryFrame() : nullptr;
|
|
while (!startFrame && startNode != endNode) {
|
|
startNode = aBackward ? walker->PreviousNode(err) : walker->NextNode(err);
|
|
|
|
if (!startNode) {
|
|
break;
|
|
}
|
|
|
|
startContent = startNode->AsContent();
|
|
startFrame = startContent ? startContent->GetPrimaryFrame() : nullptr;
|
|
}
|
|
return startFrame;
|
|
}
|
|
|
|
bool
|
|
AccessibleCaretManager::CompareRangeWithContentOffset(nsIFrame::ContentOffsets& aOffsets)
|
|
{
|
|
Selection* selection = GetSelection();
|
|
if (!selection) {
|
|
return false;
|
|
}
|
|
|
|
uint32_t rangeCount = selection->RangeCount();
|
|
MOZ_ASSERT(rangeCount > 0);
|
|
|
|
int32_t rangeIndex = (mActiveCaret == mFirstCaret.get() ? rangeCount - 1 : 0);
|
|
nsRefPtr<nsRange> range = selection->GetRangeAt(rangeIndex);
|
|
|
|
nsINode* node = nullptr;
|
|
int32_t nodeOffset = 0;
|
|
CaretAssociationHint hint;
|
|
nsDirection dir;
|
|
|
|
if (mActiveCaret == mFirstCaret.get()) {
|
|
// Check previous character of end node offset
|
|
node = range->GetEndParent();
|
|
nodeOffset = range->EndOffset();
|
|
hint = CARET_ASSOCIATE_BEFORE;
|
|
dir = eDirPrevious;
|
|
} else {
|
|
// Check next character of start node offset
|
|
node = range->GetStartParent();
|
|
nodeOffset = range->StartOffset();
|
|
hint = CARET_ASSOCIATE_AFTER;
|
|
dir = eDirNext;
|
|
}
|
|
nsCOMPtr<nsIContent> content = do_QueryInterface(node);
|
|
|
|
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
|
|
if (!fs) {
|
|
return false;
|
|
}
|
|
|
|
int32_t offset = 0;
|
|
nsIFrame* theFrame =
|
|
fs->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 ((mActiveCaret == mFirstCaret.get() && result == 1) ||
|
|
(mActiveCaret == mSecondCaret.get() && result == -1)) {
|
|
aOffsets.content = pos.mResultContent;
|
|
aOffsets.offset = pos.mContentOffset;
|
|
aOffsets.secondaryOffset = pos.mContentOffset;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
AccessibleCaretManager::DragCaretInternal(const nsPoint& aPoint)
|
|
{
|
|
if (!mPresShell) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
nsIFrame* rootFrame = mPresShell->GetRootFrame();
|
|
if (!rootFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
nsPoint point = AdjustDragBoundary(aPoint);
|
|
|
|
// Find out which content we point to
|
|
nsIFrame* ptFrame = nsLayoutUtils::GetFrameForPoint(
|
|
rootFrame, point,
|
|
nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC);
|
|
if (!ptFrame) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
|
|
if (!fs) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
nsresult result;
|
|
nsIFrame* newFrame = nullptr;
|
|
nsPoint newPoint;
|
|
nsPoint ptInFrame = point;
|
|
nsLayoutUtils::TransformPoint(rootFrame, ptFrame, ptInFrame);
|
|
result = fs->ConstrainFrameAndPointToAnchorSubtree(ptFrame, ptInFrame,
|
|
&newFrame, newPoint);
|
|
if (NS_FAILED(result) || !newFrame) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
bool selectable;
|
|
newFrame->IsSelectable(&selectable, nullptr);
|
|
if (!selectable) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsIFrame::ContentOffsets offsets =
|
|
newFrame->GetContentOffsetsFromPoint(newPoint);
|
|
if (!offsets.content) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
Selection* selection = GetSelection();
|
|
if (!selection) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
if (GetCaretMode() == CaretMode::Selection &&
|
|
!CompareRangeWithContentOffset(offsets)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
ClearMaintainedSelection();
|
|
|
|
nsIFrame* anchorFrame = nullptr;
|
|
selection->GetPrimaryFrameForAnchorNode(&anchorFrame);
|
|
|
|
nsIFrame* scrollable =
|
|
nsLayoutUtils::GetClosestFrameOfType(anchorFrame, nsGkAtoms::scrollFrame);
|
|
nsWeakFrame weakScrollable = scrollable;
|
|
fs->HandleClick(offsets.content, offsets.StartOffset(), offsets.EndOffset(),
|
|
GetCaretMode() == CaretMode::Selection, false,
|
|
offsets.associate);
|
|
if (!weakScrollable.IsAlive()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Scroll scrolled frame.
|
|
nsIScrollableFrame* saf = do_QueryFrame(scrollable);
|
|
nsIFrame* capturingFrame = saf->GetScrolledFrame();
|
|
nsPoint ptInScrolled = point;
|
|
nsLayoutUtils::TransformPoint(rootFrame, capturingFrame, ptInScrolled);
|
|
fs->StartAutoScrollTimer(capturingFrame, ptInScrolled, kAutoScrollTimerDelay);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsPoint
|
|
AccessibleCaretManager::AdjustDragBoundary(const nsPoint& aPoint) const
|
|
{
|
|
// Bug 1068474: Adjust the Y-coordinate so that the carets won't be in tilt
|
|
// mode when a caret is being dragged surpass the other caret.
|
|
//
|
|
// For example, when dragging the second caret, the horizontal boundary (lower
|
|
// bound) of its Y-coordinate is the logical position of the first caret.
|
|
// Likewise, when dragging the first caret, the horizontal boundary (upper
|
|
// bound) of its Y-coordinate is the logical position of the second caret.
|
|
nsPoint adjustedPoint = aPoint;
|
|
|
|
if (GetCaretMode() == CaretMode::Selection) {
|
|
if (mActiveCaret == mFirstCaret.get()) {
|
|
nscoord dragDownBoundaryY = mSecondCaret->LogicalPosition().y;
|
|
if (adjustedPoint.y > dragDownBoundaryY) {
|
|
adjustedPoint.y = dragDownBoundaryY;
|
|
}
|
|
} else {
|
|
nscoord dragUpBoundaryY = mFirstCaret->LogicalPosition().y;
|
|
if (adjustedPoint.y < dragUpBoundaryY) {
|
|
adjustedPoint.y = dragUpBoundaryY;
|
|
}
|
|
}
|
|
}
|
|
|
|
return adjustedPoint;
|
|
}
|
|
|
|
uint32_t
|
|
AccessibleCaretManager::CaretTimeoutMs() const
|
|
{
|
|
static bool added = false;
|
|
static uint32_t caretTimeoutMs = 0;
|
|
|
|
if (!added) {
|
|
Preferences::AddUintVarCache(&caretTimeoutMs,
|
|
"layout.accessiblecaret.timeout_ms");
|
|
added = true;
|
|
}
|
|
|
|
return caretTimeoutMs;
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::LaunchCaretTimeoutTimer()
|
|
{
|
|
if (!mCaretTimeoutTimer || CaretTimeoutMs() == 0 ||
|
|
GetCaretMode() != CaretMode::Cursor || mActiveCaret) {
|
|
return;
|
|
}
|
|
|
|
nsTimerCallbackFunc callback = [](nsITimer* aTimer, void* aClosure) {
|
|
auto self = static_cast<AccessibleCaretManager*>(aClosure);
|
|
if (self->GetCaretMode() == CaretMode::Cursor) {
|
|
self->HideCarets();
|
|
}
|
|
};
|
|
|
|
mCaretTimeoutTimer->InitWithFuncCallback(callback, this, CaretTimeoutMs(),
|
|
nsITimer::TYPE_ONE_SHOT);
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::CancelCaretTimeoutTimer()
|
|
{
|
|
if (mCaretTimeoutTimer) {
|
|
mCaretTimeoutTimer->Cancel();
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla
|