mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 20:54:40 +00:00
1182 lines
32 KiB
C++
1182 lines
32 KiB
C++
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/* -*- 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 "mozilla/IMEStateManager.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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#include "nsIHapticFeedback.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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/*static*/ bool
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AccessibleCaretManager::sCaretsExtendedVisibility = false;
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/*static*/ bool
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AccessibleCaretManager::sHapticFeedback = false;
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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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return;
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}
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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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static bool addedPrefs = false;
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if (!addedPrefs) {
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Preferences::AddBoolVarCache(&sCaretsExtendedVisibility,
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"layout.accessiblecaret.extendedvisibility");
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Preferences::AddBoolVarCache(&sHapticFeedback,
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"layout.accessiblecaret.hapticfeedback");
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addedPrefs = true;
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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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Selection* selection = GetSelection();
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AC_LOG("%s: aSel: %p, GetSelection(): %p, aReason: %d", __FUNCTION__,
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aSel, selection, aReason);
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if (aSel != selection) {
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return NS_OK;
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}
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// eSetSelection events from the Fennec widget IME can be generated
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// by autoSuggest, autoCorrect, and nsCaret position changes.
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if (aReason & nsISelectionListener::IME_REASON) {
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if (GetCaretMode() == CaretMode::Cursor) {
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// Caret position changes need us to open/update,
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// or hide the AccessibleCaret.
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FlushLayout();
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UpdateCarets();
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} else {
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// Ignore transient autoSuggest selection styling,
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// or autoCorrect text updates.
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}
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return NS_OK;
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}
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// Move the cursor by Javascript / or unknown internal.
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if (aReason == nsISelectionListener::NO_REASON) {
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// Extended visibility won't make hidden carets visible. Visible carets will
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// be updated or hidden as appropriate.
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if (sCaretsExtendedVisibility &&
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(mFirstCaret->IsLogicallyVisible() || mSecondCaret->IsLogicallyVisible())) {
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FlushLayout();
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UpdateCarets();
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return NS_OK;
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}
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// Default for NO_REASON is to make hidden.
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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::DoNotShowCarets()
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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::NormalNotShown);
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mSecondCaret->SetAppearance(Appearance::NormalNotShown);
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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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RefPtr<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 (!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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void
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AccessibleCaretManager::ProvideHapticFeedback()
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{
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if (sHapticFeedback) {
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nsCOMPtr<nsIHapticFeedback> haptic =
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do_GetService("@mozilla.org/widget/hapticfeedback;1");
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haptic->PerformSimpleAction(haptic->LongPress);
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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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||
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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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|
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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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|
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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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{
|
||
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if (!mPresShell) {
|
||
|
return NS_ERROR_UNEXPECTED;
|
||
|
}
|
||
|
|
||
|
nsIFrame* rootFrame = mPresShell->GetRootFrame();
|
||
|
if (!rootFrame) {
|
||
|
return NS_ERROR_NOT_AVAILABLE;
|
||
|
}
|
||
|
|
||
|
// Find the frame under point.
|
||
|
nsIFrame* ptFrame = nsLayoutUtils::GetFrameForPoint(rootFrame, aPoint,
|
||
|
nsLayoutUtils::IGNORE_PAINT_SUPPRESSION | nsLayoutUtils::IGNORE_CROSS_DOC);
|
||
|
if (!ptFrame) {
|
||
|
return NS_ERROR_FAILURE;
|
||
|
}
|
||
|
|
||
|
nsIFrame* focusableFrame = GetFocusableFrame(ptFrame);
|
||
|
|
||
|
#ifdef DEBUG_FRAME_DUMP
|
||
|
AC_LOG("%s: Found %s under (%d, %d)", __FUNCTION__, ptFrame->ListTag().get(),
|
||
|
aPoint.x, aPoint.y);
|
||
|
AC_LOG("%s: Found %s focusable", __FUNCTION__,
|
||
|
focusableFrame ? focusableFrame->ListTag().get() : "no frame");
|
||
|
#endif
|
||
|
|
||
|
// Firstly check long press on an empty editable content.
|
||
|
Element* newFocusEditingHost = GetEditingHostForFrame(ptFrame);
|
||
|
if (focusableFrame && newFocusEditingHost &&
|
||
|
!HasNonEmptyTextContent(newFocusEditingHost)) {
|
||
|
ChangeFocusToOrClearOldFocus(focusableFrame);
|
||
|
// We need to update carets to get correct information before dispatching
|
||
|
// CaretStateChangedEvent.
|
||
|
UpdateCarets();
|
||
|
ProvideHapticFeedback();
|
||
|
DispatchCaretStateChangedEvent(CaretChangedReason::Longpressonemptycontent);
|
||
|
return NS_OK;
|
||
|
}
|
||
|
|
||
|
bool selectable = false;
|
||
|
ptFrame->IsSelectable(&selectable, nullptr);
|
||
|
|
||
|
#ifdef DEBUG_FRAME_DUMP
|
||
|
AC_LOG("%s: %s %s selectable.", __FUNCTION__, ptFrame->ListTag().get(),
|
||
|
selectable ? "is" : "is NOT");
|
||
|
#endif
|
||
|
|
||
|
if (!selectable) {
|
||
|
return NS_ERROR_FAILURE;
|
||
|
}
|
||
|
|
||
|
// Commit the composition string of the old editable focus element (if there
|
||
|
// is any) before changing the focus.
|
||
|
IMEStateManager::NotifyIME(widget::REQUEST_TO_COMMIT_COMPOSITION,
|
||
|
mPresShell->GetPresContext());
|
||
|
|
||
|
// ptFrame is selectable. Now change the focus.
|
||
|
ChangeFocusToOrClearOldFocus(focusableFrame);
|
||
|
|
||
|
// Then try select a word under point.
|
||
|
nsPoint ptInFrame = aPoint;
|
||
|
nsLayoutUtils::TransformPoint(rootFrame, ptFrame, ptInFrame);
|
||
|
|
||
|
nsresult rv = SelectWord(ptFrame, ptInFrame);
|
||
|
UpdateCarets();
|
||
|
ProvideHapticFeedback();
|
||
|
|
||
|
return rv;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
AccessibleCaretManager::OnScrollStart()
|
||
|
{
|
||
|
AC_LOG("%s", __FUNCTION__);
|
||
|
|
||
|
if (GetCaretMode() == CaretMode::Cursor) {
|
||
|
mFirstCaretAppearanceOnScrollStart = mFirstCaret->GetAppearance();
|
||
|
}
|
||
|
|
||
|
// Hide the carets. (Extended visibility makes them "NormalNotShown").
|
||
|
if (sCaretsExtendedVisibility) {
|
||
|
DoNotShowCarets();
|
||
|
} else {
|
||
|
HideCarets();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
AccessibleCaretManager::OnScrollEnd()
|
||
|
{
|
||
|
if (mLastUpdateCaretMode != GetCaretMode()) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (GetCaretMode() == CaretMode::Cursor) {
|
||
|
mFirstCaret->SetAppearance(mFirstCaretAppearanceOnScrollStart);
|
||
|
if (!mFirstCaret->IsLogicallyVisible()) {
|
||
|
// If the caret is hide (Appearance::None) due to timeout or blur, no need
|
||
|
// to update it.
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
AC_LOG("%s: UpdateCarets()", __FUNCTION__);
|
||
|
UpdateCarets();
|
||
|
}
|
||
|
|
||
|
void
|
||
|
AccessibleCaretManager::OnScrollPositionChanged()
|
||
|
{
|
||
|
if (mLastUpdateCaretMode != GetCaretMode()) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (mFirstCaret->IsLogicallyVisible() || mSecondCaret->IsLogicallyVisible()) {
|
||
|
AC_LOG("%s: UpdateCarets(RespectOldAppearance)", __FUNCTION__);
|
||
|
UpdateCarets(UpdateCaretsHint::RespectOldAppearance);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
AccessibleCaretManager::OnReflow()
|
||
|
{
|
||
|
if (mLastUpdateCaretMode != GetCaretMode()) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (mFirstCaret->IsLogicallyVisible() || mSecondCaret->IsLogicallyVisible()) {
|
||
|
AC_LOG("%s: UpdateCarets(RespectOldAppearance)", __FUNCTION__);
|
||
|
UpdateCarets(UpdateCaretsHint::RespectOldAppearance);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
AccessibleCaretManager::OnBlur()
|
||
|
{
|
||
|
AC_LOG("%s: HideCarets()", __FUNCTION__);
|
||
|
HideCarets();
|
||
|
}
|
||
|
|
||
|
void
|
||
|
AccessibleCaretManager::OnKeyboardEvent()
|
||
|
{
|
||
|
if (GetCaretMode() == CaretMode::Cursor) {
|
||
|
AC_LOG("%s: HideCarets()", __FUNCTION__);
|
||
|
HideCarets();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
Selection*
|
||
|
AccessibleCaretManager::GetSelection() const
|
||
|
{
|
||
|
RefPtr<nsFrameSelection> fs = GetFrameSelection();
|
||
|
if (!fs) {
|
||
|
return nullptr;
|
||
|
}
|
||
|
return fs->GetSelection(nsISelectionController::SELECTION_NORMAL);
|
||
|
}
|
||
|
|
||
|
already_AddRefed<nsFrameSelection>
|
||
|
AccessibleCaretManager::GetFrameSelection() const
|
||
|
{
|
||
|
if (!mPresShell) {
|
||
|
return nullptr;
|
||
|
}
|
||
|
|
||
|
nsFocusManager* fm = nsFocusManager::GetFocusManager();
|
||
|
MOZ_ASSERT(fm);
|
||
|
|
||
|
nsIContent* focusedContent = fm->GetFocusedContent();
|
||
|
if (focusedContent) {
|
||
|
nsIFrame* focusFrame = focusedContent->GetPrimaryFrame();
|
||
|
if (!focusFrame) {
|
||
|
return nullptr;
|
||
|
}
|
||
|
|
||
|
// Prevent us from touching the nsFrameSelection associated with other
|
||
|
// PresShell.
|
||
|
RefPtr<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
|
||
|
{
|
||
|
RefPtr<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.
|
||
|
RefPtr<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;
|
||
|
}
|
||
|
|
||
|
RefPtr<Selection> selection = GetSelection();
|
||
|
if (!selection) {
|
||
|
return nullptr;
|
||
|
}
|
||
|
|
||
|
RefPtr<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);
|
||
|
RefPtr<nsINode> startNode =
|
||
|
aBackward ? range->GetEndParent() : range->GetStartParent();
|
||
|
RefPtr<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;
|
||
|
RefPtr<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);
|
||
|
RefPtr<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);
|
||
|
|
||
|
RefPtr<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;
|
||
|
}
|
||
|
|
||
|
RefPtr<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;
|
||
|
}
|
||
|
|
||
|
nsRect
|
||
|
AccessibleCaretManager::GetContentBoundaryForFrame(nsIFrame* aFrame) const
|
||
|
{
|
||
|
nsRect resultRect;
|
||
|
nsIFrame* rootFrame = mPresShell->GetRootFrame();
|
||
|
|
||
|
for (; aFrame; aFrame = aFrame->GetNextContinuation()) {
|
||
|
nsRect rect = aFrame->GetContentRectRelativeToSelf();
|
||
|
nsLayoutUtils::TransformRect(aFrame, rootFrame, rect);
|
||
|
resultRect = resultRect.Union(rect);
|
||
|
|
||
|
nsIFrame::ChildListIterator lists(aFrame);
|
||
|
for (; !lists.IsDone(); lists.Next()) {
|
||
|
// Loop over all children to take the overflow rect into consideration.
|
||
|
for (nsIFrame* child : lists.CurrentList()) {
|
||
|
nsRect overflowRect = child->GetScrollableOverflowRect();
|
||
|
nsLayoutUtils::TransformRect(child, rootFrame, overflowRect);
|
||
|
resultRect = resultRect.Union(overflowRect);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Shrink rect to make sure we never hit the boundary.
|
||
|
resultRect.Deflate(kBoundaryAppUnits);
|
||
|
return resultRect;
|
||
|
}
|
||
|
|
||
|
nsPoint
|
||
|
AccessibleCaretManager::AdjustDragBoundary(const nsPoint& aPoint) const
|
||
|
{
|
||
|
nsPoint adjustedPoint = aPoint;
|
||
|
|
||
|
int32_t focusOffset = 0;
|
||
|
nsIFrame* focusFrame =
|
||
|
nsCaret::GetFrameAndOffset(GetSelection(), nullptr, 0, &focusOffset);
|
||
|
Element* editingHost = GetEditingHostForFrame(focusFrame);
|
||
|
|
||
|
if (editingHost) {
|
||
|
nsRect boundary =
|
||
|
GetContentBoundaryForFrame(editingHost->GetPrimaryFrame());
|
||
|
adjustedPoint = boundary.ClampPoint(adjustedPoint);
|
||
|
}
|
||
|
|
||
|
if (GetCaretMode() == CaretMode::Selection) {
|
||
|
// 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.
|
||
|
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();
|
||
|
}
|
||
|
|
||
|
RefPtr<DOMRect> domRect = new DOMRect(ToSupports(doc));
|
||
|
nsRect rect = nsLayoutUtils::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();
|
||
|
init.mCaretVisuallyVisible = mFirstCaret->IsVisuallyVisible() ||
|
||
|
mSecondCaret->IsVisuallyVisible();
|
||
|
sel->Stringify(init.mSelectedTextContent);
|
||
|
|
||
|
RefPtr<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
|