742821878e
After HideCaret() is called via keyboard event, OnScrollPositionChanged() still fire another CaretStateChanged event even if the caret is hidden. We follow OnReflow() to update carets only when carets are logically visible. A test case: 1. Type a string on the rocketbar until the text is long enough to scroll. 2. Copy arbitrary string. 3. Tap on rocketbar to show caret, and move it to the end (within 15 seconds timeout) 4. Type a character. The text selection dialog should not show.
1061 lines
29 KiB
C++
1061 lines
29 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/AsyncEventDispatcher.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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#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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using namespace dom;
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using Appearance = AccessibleCaret::Appearance;
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using PositionChangedResult = AccessibleCaret::PositionChangedResult;
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#define AC_PROCESS_ENUM_TO_STREAM(e) case(e): aStream << #e; break;
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std::ostream&
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operator<<(std::ostream& aStream,
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const AccessibleCaretManager::CaretMode& aCaretMode)
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{
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using CaretMode = AccessibleCaretManager::CaretMode;
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switch (aCaretMode) {
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AC_PROCESS_ENUM_TO_STREAM(CaretMode::None);
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AC_PROCESS_ENUM_TO_STREAM(CaretMode::Cursor);
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AC_PROCESS_ENUM_TO_STREAM(CaretMode::Selection);
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}
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return aStream;
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}
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std::ostream& operator<<(std::ostream& aStream,
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const AccessibleCaretManager::UpdateCaretsHint& aHint)
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{
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using UpdateCaretsHint = AccessibleCaretManager::UpdateCaretsHint;
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switch (aHint) {
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AC_PROCESS_ENUM_TO_STREAM(UpdateCaretsHint::Default);
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AC_PROCESS_ENUM_TO_STREAM(UpdateCaretsHint::RespectOldAppearance);
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}
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return aStream;
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}
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#undef AC_PROCESS_ENUM_TO_STREAM
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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("%s: aSel: %p, GetSelection(): %p, aReason: %d", __FUNCTION__,
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aSel, GetSelection(), 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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// OnBlur() might be called between mouse down and mouse up, so we hide carets
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// upon mouse down anyway, and update carets upon mouse up.
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if (aReason & nsISelectionListener::MOUSEDOWN_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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DispatchCaretStateChangedEvent(CaretChangedReason::Visibilitychange);
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CancelCaretTimeoutTimer();
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}
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}
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void
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AccessibleCaretManager::UpdateCarets(UpdateCaretsHint aHint)
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{
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mLastUpdateCaretMode = GetCaretMode();
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switch (mLastUpdateCaretMode) {
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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(aHint);
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break;
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case CaretMode::Selection:
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UpdateCaretsForSelectionMode(aHint);
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break;
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}
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}
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bool
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AccessibleCaretManager::IsCaretDisplayableInCursorMode(nsIFrame** aOutFrame,
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int32_t* aOutOffset) const
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{
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nsRefPtr<nsCaret> caret = mPresShell->GetCaret();
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if (!caret || !caret->IsVisible()) {
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return false;
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}
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int32_t offset = 0;
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nsIFrame* frame = nsCaret::GetFrameAndOffset(GetSelection(), nullptr, 0, &offset);
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if (!frame) {
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return false;
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}
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if (!GetEditingHostForFrame(frame)) {
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return false;
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}
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if (aOutFrame) {
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*aOutFrame = frame;
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}
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if (aOutOffset) {
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*aOutOffset = offset;
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}
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return true;
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}
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bool
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AccessibleCaretManager::HasNonEmptyTextContent(nsINode* aNode) const
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{
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return nsContentUtils::HasNonEmptyTextContent(
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aNode, nsContentUtils::eRecurseIntoChildren);
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}
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void
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AccessibleCaretManager::UpdateCaretsForCursorMode(UpdateCaretsHint aHint)
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{
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AC_LOG("%s, selection: %p", __FUNCTION__, GetSelection());
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int32_t offset = 0;
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nsIFrame* frame = nullptr;
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if (!IsCaretDisplayableInCursorMode(&frame, &offset)) {
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HideCarets();
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return;
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}
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bool oldSecondCaretVisible = mSecondCaret->IsLogicallyVisible();
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PositionChangedResult result = mFirstCaret->SetPosition(frame, offset);
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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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switch (aHint) {
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case UpdateCaretsHint::Default:
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if (HasNonEmptyTextContent(GetEditingHostForFrame(frame))) {
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mFirstCaret->SetAppearance(Appearance::Normal);
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} else {
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mFirstCaret->SetAppearance(Appearance::NormalNotShown);
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}
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break;
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case UpdateCaretsHint::RespectOldAppearance:
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// Do nothing to prevent the appearance of the caret being
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// changed from NormalNotShown to Normal.
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break;
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}
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break;
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case PositionChangedResult::Invisible:
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mFirstCaret->SetAppearance(Appearance::NormalNotShown);
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break;
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}
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mFirstCaret->SetSelectionBarEnabled(false);
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mSecondCaret->SetAppearance(Appearance::None);
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LaunchCaretTimeoutTimer();
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if ((result != PositionChangedResult::NotChanged || oldSecondCaretVisible) &&
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!mActiveCaret) {
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DispatchCaretStateChangedEvent(CaretChangedReason::Updateposition);
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}
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}
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void
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AccessibleCaretManager::UpdateCaretsForSelectionMode(UpdateCaretsHint aHint)
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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 (!CompareTreePosition(startFrame, endFrame)) {
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// XXX: Do we really have to hide carets if this condition isn't satisfied?
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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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FlushLayout();
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}
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UpdateCaretsForTilt();
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if ((firstCaretResult == PositionChangedResult::Changed ||
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secondCaretResult == PositionChangedResult::Changed ||
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firstCaretResult == PositionChangedResult::Invisible ||
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secondCaretResult == PositionChangedResult::Invisible) &&
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!mActiveCaret) {
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DispatchCaretStateChangedEvent(CaretChangedReason::Updateposition);
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}
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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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DispatchCaretStateChangedEvent(CaretChangedReason::Presscaret);
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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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DispatchCaretStateChangedEvent(CaretChangedReason::Releasecaret);
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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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DispatchCaretStateChangedEvent(CaretChangedReason::Taponcaret);
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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 the frame under 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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nsIFrame* focusableFrame = GetFocusableFrame(ptFrame);
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#ifdef DEBUG_FRAME_DUMP
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AC_LOG("%s: Found %s under (%d, %d)", __FUNCTION__, ptFrame->ListTag().get(),
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aPoint.x, aPoint.y);
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AC_LOG("%s: Found %s focusable", __FUNCTION__,
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focusableFrame ? focusableFrame->ListTag().get() : "no frame");
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#endif
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// Firstly check long press on an empty editable content.
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Element* newFocusEditingHost = GetEditingHostForFrame(ptFrame);
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if (focusableFrame && newFocusEditingHost &&
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!HasNonEmptyTextContent(newFocusEditingHost)) {
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ChangeFocusToOrClearOldFocus(focusableFrame);
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// We need to update carets to get correct information before dispatching
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// CaretStateChangedEvent.
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UpdateCarets();
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DispatchCaretStateChangedEvent(CaretChangedReason::Longpressonemptycontent);
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return NS_OK;
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}
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bool selectable = false;
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ptFrame->IsSelectable(&selectable, nullptr);
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#ifdef DEBUG_FRAME_DUMP
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AC_LOG("%s: %s %s selectable.", __FUNCTION__, ptFrame->ListTag().get(),
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selectable ? "is" : "is NOT");
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#endif
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if (!selectable) {
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return NS_ERROR_FAILURE;
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}
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// ptFrame is selectable. Now change the focus.
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ChangeFocusToOrClearOldFocus(focusableFrame);
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// Then try select a word under point.
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nsPoint ptInFrame = aPoint;
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nsLayoutUtils::TransformPoint(rootFrame, ptFrame, ptInFrame);
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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 (mLastUpdateCaretMode != 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 (mLastUpdateCaretMode != GetCaretMode()) {
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return;
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}
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if (mFirstCaret->IsLogicallyVisible() || mSecondCaret->IsLogicallyVisible()) {
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AC_LOG("%s: UpdateCarets(RespectOldAppearance)", __FUNCTION__);
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UpdateCarets(UpdateCaretsHint::RespectOldAppearance);
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}
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}
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void
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AccessibleCaretManager::OnReflow()
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{
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if (mLastUpdateCaretMode != GetCaretMode()) {
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return;
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}
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if (mFirstCaret->IsLogicallyVisible() || mSecondCaret->IsLogicallyVisible()) {
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AC_LOG("%s: UpdateCarets(RespectOldAppearance)", __FUNCTION__);
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UpdateCarets(UpdateCaretsHint::RespectOldAppearance);
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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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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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if (!mPresShell) {
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return nullptr;
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}
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nsFocusManager* fm = nsFocusManager::GetFocusManager();
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MOZ_ASSERT(fm);
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nsIContent* focusedContent = fm->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
|
|
// PresShell.
|
|
nsRefPtr<nsFrameSelection> fs = focusFrame->GetFrameSelection();
|
|
if (!fs || fs->GetShell() != mPresShell) {
|
|
return nullptr;
|
|
}
|
|
|
|
return fs.forget();
|
|
} else {
|
|
// For non-editable content
|
|
return mPresShell->FrameSelection();
|
|
}
|
|
}
|
|
|
|
Element*
|
|
AccessibleCaretManager::GetEditingHostForFrame(nsIFrame* aFrame) const
|
|
{
|
|
if (!aFrame) {
|
|
return nullptr;
|
|
}
|
|
|
|
auto content = aFrame->GetContent();
|
|
if (!content) {
|
|
return nullptr;
|
|
}
|
|
|
|
return content->GetEditingHost();
|
|
}
|
|
|
|
|
|
AccessibleCaretManager::CaretMode
|
|
AccessibleCaretManager::GetCaretMode() const
|
|
{
|
|
Selection* selection = GetSelection();
|
|
if (!selection) {
|
|
return CaretMode::None;
|
|
}
|
|
|
|
uint32_t rangeCount = selection->RangeCount();
|
|
if (rangeCount <= 0) {
|
|
return CaretMode::None;
|
|
}
|
|
|
|
if (selection->IsCollapsed()) {
|
|
return CaretMode::Cursor;
|
|
}
|
|
|
|
return CaretMode::Selection;
|
|
}
|
|
|
|
nsIFrame*
|
|
AccessibleCaretManager::GetFocusableFrame(nsIFrame* aFrame) const
|
|
{
|
|
// This implementation is similar to EventStateManager::PostHandleEvent().
|
|
// Look for the nearest enclosing focusable frame.
|
|
nsIFrame* focusableFrame = aFrame;
|
|
while (focusableFrame) {
|
|
if (focusableFrame->IsFocusable(nullptr, true)) {
|
|
break;
|
|
}
|
|
focusableFrame = focusableFrame->GetParent();
|
|
}
|
|
return focusableFrame;
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::ChangeFocusToOrClearOldFocus(nsIFrame* aFrame) const
|
|
{
|
|
nsFocusManager* fm = nsFocusManager::GetFocusManager();
|
|
MOZ_ASSERT(fm);
|
|
|
|
if (aFrame) {
|
|
nsIContent* focusableContent = aFrame->GetContent();
|
|
MOZ_ASSERT(focusableContent, "Focusable frame must have content!");
|
|
nsCOMPtr<nsIDOMElement> focusableElement = do_QueryInterface(focusableContent);
|
|
fm->SetFocus(focusableElement, nsIFocusManager::FLAG_BYMOUSE);
|
|
} else {
|
|
nsIDOMWindow* win = mPresShell->GetDocument()->GetWindow();
|
|
if (win) {
|
|
fm->ClearFocus(win);
|
|
fm->SetFocusedWindow(win);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
AccessibleCaretManager::SelectWord(nsIFrame* aFrame, const nsPoint& aPoint) const
|
|
{
|
|
SetSelectionDragState(true);
|
|
nsFrame* frame = static_cast<nsFrame*>(aFrame);
|
|
nsresult rs = frame->SelectByTypeAtPoint(mPresShell->GetPresContext(), aPoint,
|
|
eSelectWord, eSelectWord, 0);
|
|
|
|
SetSelectionDragState(false);
|
|
ClearMaintainedSelection();
|
|
|
|
return rs;
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::SetSelectionDragState(bool aState) const
|
|
{
|
|
nsRefPtr<nsFrameSelection> fs = GetFrameSelection();
|
|
if (fs) {
|
|
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);
|
|
}
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::FlushLayout() const
|
|
{
|
|
if (mPresShell) {
|
|
mPresShell->FlushPendingNotifications(Flush_Layout);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
bool
|
|
AccessibleCaretManager::CompareTreePosition(nsIFrame* aStartFrame,
|
|
nsIFrame* aEndFrame) const
|
|
{
|
|
return (aStartFrame && aEndFrame &&
|
|
nsLayoutUtils::CompareTreePosition(aStartFrame, aEndFrame) <= 0);
|
|
}
|
|
|
|
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 (dragDownBoundaryY > 0 && 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();
|
|
}
|
|
}
|
|
|
|
void
|
|
AccessibleCaretManager::DispatchCaretStateChangedEvent(CaretChangedReason aReason) const
|
|
{
|
|
// Holding PresShell to prevent AccessibleCaretManager to be destroyed.
|
|
nsCOMPtr<nsIPresShell> presShell = mPresShell;
|
|
|
|
FlushLayout();
|
|
if (presShell->IsDestroying()) {
|
|
return;
|
|
}
|
|
|
|
Selection* sel = GetSelection();
|
|
if (!sel) {
|
|
return;
|
|
}
|
|
|
|
nsIDocument* doc = mPresShell->GetDocument();
|
|
MOZ_ASSERT(doc);
|
|
|
|
CaretStateChangedEventInit init;
|
|
init.mBubbles = true;
|
|
|
|
const nsRange* range = sel->GetAnchorFocusRange();
|
|
nsINode* commonAncestorNode = nullptr;
|
|
if (range) {
|
|
commonAncestorNode = range->GetCommonAncestor();
|
|
}
|
|
|
|
if (!commonAncestorNode) {
|
|
commonAncestorNode = sel->GetFrameSelection()->GetAncestorLimiter();
|
|
}
|
|
|
|
nsRefPtr<DOMRect> domRect = new DOMRect(ToSupports(doc));
|
|
nsRect rect = nsContentUtils::GetSelectionBoundingRect(sel);
|
|
|
|
nsIFrame* commonAncestorFrame = nullptr;
|
|
nsIFrame* rootFrame = mPresShell->GetRootFrame();
|
|
|
|
if (commonAncestorNode && commonAncestorNode->IsContent()) {
|
|
commonAncestorFrame = commonAncestorNode->AsContent()->GetPrimaryFrame();
|
|
}
|
|
|
|
if (commonAncestorFrame && rootFrame) {
|
|
nsLayoutUtils::TransformRect(rootFrame, commonAncestorFrame, rect);
|
|
nsRect clampedRect = nsLayoutUtils::ClampRectToScrollFrames(commonAncestorFrame,
|
|
rect);
|
|
nsLayoutUtils::TransformRect(commonAncestorFrame, rootFrame, clampedRect);
|
|
domRect->SetLayoutRect(clampedRect);
|
|
init.mSelectionVisible = !clampedRect.IsEmpty();
|
|
} else {
|
|
domRect->SetLayoutRect(rect);
|
|
init.mSelectionVisible = true;
|
|
}
|
|
|
|
// Send isEditable info w/ event detail. This info can help determine
|
|
// whether to show cut command on selection dialog or not.
|
|
init.mSelectionEditable = commonAncestorFrame &&
|
|
GetEditingHostForFrame(commonAncestorFrame);
|
|
|
|
init.mBoundingClientRect = domRect;
|
|
init.mReason = aReason;
|
|
init.mCollapsed = sel->IsCollapsed();
|
|
init.mCaretVisible = mFirstCaret->IsLogicallyVisible() ||
|
|
mSecondCaret->IsLogicallyVisible();
|
|
sel->Stringify(init.mSelectedTextContent);
|
|
|
|
nsRefPtr<CaretStateChangedEvent> event =
|
|
CaretStateChangedEvent::Constructor(doc, NS_LITERAL_STRING("mozcaretstatechanged"), init);
|
|
|
|
event->SetTrusted(true);
|
|
event->GetInternalNSEvent()->mFlags.mOnlyChromeDispatch = true;
|
|
|
|
AC_LOG("%s: reason %d, collapsed %d, caretVisible %d", __FUNCTION__,
|
|
init.mReason, init.mCollapsed, init.mCaretVisible);
|
|
|
|
(new AsyncEventDispatcher(doc, event))->RunDOMEventWhenSafe();
|
|
}
|
|
|
|
} // namespace mozilla
|