mozilla
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gecko-dev
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gecko-dev/widget/ContentCache.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/ContentCache.h"
#include <utility>
#include "mozilla/IMEStateManager.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Logging.h"
#include "mozilla/RefPtr.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEvents.h"
#include "mozilla/dom/BrowserParent.h"
#include "nsExceptionHandler.h"
#include "nsIWidget.h"
namespace mozilla {
using namespace dom;
using namespace widget;
static const char* GetBoolName(bool aBool) { return aBool ? "true" : "false"; }
static const char* GetNotificationName(const IMENotification* aNotification) {
if (!aNotification) {
return "Not notification";
}
return ToChar(aNotification->mMessage);
}
/*****************************************************************************
* mozilla::ContentCache
*****************************************************************************/
LazyLogModule sContentCacheLog("ContentCacheWidgets");
/*****************************************************************************
* mozilla::ContentCacheInChild
*****************************************************************************/
void ContentCacheInChild::Clear() {
MOZ_LOG(sContentCacheLog, LogLevel::Info, ("0x%p Clear()", this));
mCompositionStart.reset();
mLastCommit.reset();
mText.Truncate();
mSelection.reset();
mFirstCharRect.SetEmpty();
mCaret.reset();
mTextRectArray.reset();
mLastCommitStringTextRectArray.reset();
mEditorRect.SetEmpty();
}
void ContentCacheInChild::OnCompositionEvent(
const WidgetCompositionEvent& aCompositionEvent) {
if (aCompositionEvent.CausesDOMCompositionEndEvent()) {
RefPtr<TextComposition> composition =
IMEStateManager::GetTextCompositionFor(aCompositionEvent.mWidget);
if (composition) {
nsAutoString lastCommitString;
if (aCompositionEvent.mMessage == eCompositionCommitAsIs) {
lastCommitString = composition->CommitStringIfCommittedAsIs();
} else {
lastCommitString = aCompositionEvent.mData;
}
// We don't need to store canceling information because this is required
// by undoing of last commit (Kakutei-Undo of Japanese IME).
if (!lastCommitString.IsEmpty()) {
mLastCommit = Some(OffsetAndData<uint32_t>(
composition->NativeOffsetOfStartComposition(), lastCommitString));
MOZ_LOG(
sContentCacheLog, LogLevel::Debug,
("0x%p OnCompositionEvent(), stored last composition string data "
"(aCompositionEvent={ mMessage=%s, mData=\"%s\"}, mLastCommit=%s)",
this, ToChar(aCompositionEvent.mMessage),
PrintStringDetail(
aCompositionEvent.mData,
PrintStringDetail::kMaxLengthForCompositionString)
.get(),
ToString(mLastCommit).c_str()));
return;
}
}
}
if (mLastCommit.isSome()) {
MOZ_LOG(
sContentCacheLog, LogLevel::Debug,
("0x%p OnCompositionEvent(), resetting the last composition string "
"data (aCompositionEvent={ mMessage=%s, mData=\"%s\"}, "
"mLastCommit=%s)",
this, ToChar(aCompositionEvent.mMessage),
PrintStringDetail(aCompositionEvent.mData,
PrintStringDetail::kMaxLengthForCompositionString)
.get(),
ToString(mLastCommit).c_str()));
mLastCommit.reset();
}
}
bool ContentCacheInChild::CacheAll(nsIWidget* aWidget,
const IMENotification* aNotification) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheAll(aWidget=0x%p, aNotification=%s)", this, aWidget,
GetNotificationName(aNotification)));
if (NS_WARN_IF(!CacheText(aWidget, aNotification)) ||
NS_WARN_IF(!CacheEditorRect(aWidget, aNotification))) {
return false;
}
return true;
}
bool ContentCacheInChild::CacheSelection(nsIWidget* aWidget,
const IMENotification* aNotification) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheSelection(aWidget=0x%p, aNotification=%s)", this, aWidget,
GetNotificationName(aNotification)));
mCaret.reset();
mSelection.reset();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
aWidget);
aWidget->DispatchEvent(&querySelectedTextEvent, status);
if (NS_WARN_IF(querySelectedTextEvent.DidNotFindSelection())) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p CacheSelection(), FAILED, couldn't retrieve the selected text",
this));
return false;
}
MOZ_ASSERT(querySelectedTextEvent.mReply->mOffsetAndData.isSome());
if (querySelectedTextEvent.mReply->mReversed) {
mSelection.emplace(querySelectedTextEvent.mReply->EndOffset(),
querySelectedTextEvent.mReply->StartOffset(),
querySelectedTextEvent.mReply->WritingModeRef());
} else {
mSelection.emplace(querySelectedTextEvent.mReply->StartOffset(),
querySelectedTextEvent.mReply->EndOffset(),
querySelectedTextEvent.mReply->WritingModeRef());
}
return CacheCaret(aWidget, aNotification) &&
CacheTextRects(aWidget, aNotification);
}
bool ContentCacheInChild::CacheCaret(nsIWidget* aWidget,
const IMENotification* aNotification) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheCaret(aWidget=0x%p, aNotification=%s)", this, aWidget,
GetNotificationName(aNotification)));
mCaret.reset();
if (NS_WARN_IF(mSelection.isNothing())) {
return false;
}
// XXX Should be mSelection.mFocus?
uint32_t offset = mSelection->StartOffset();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent queryCaretRectEvet(true, eQueryCaretRect, aWidget);
queryCaretRectEvet.InitForQueryCaretRect(offset);
aWidget->DispatchEvent(&queryCaretRectEvet, status);
if (NS_WARN_IF(queryCaretRectEvet.Failed())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheCaret(), FAILED, couldn't retrieve the caret rect at "
"offset=%u",
this, offset));
return false;
}
mCaret.emplace(offset, queryCaretRectEvet.mReply->mRect);
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheCaret(), Succeeded, "
"mSelection=%s, mCaret=%s",
this, ToString(mSelection).c_str(), ToString(mCaret).c_str()));
return true;
}
bool ContentCacheInChild::CacheEditorRect(
nsIWidget* aWidget, const IMENotification* aNotification) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheEditorRect(aWidget=0x%p, aNotification=%s)", this,
aWidget, GetNotificationName(aNotification)));
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent queryEditorRectEvent(true, eQueryEditorRect, aWidget);
aWidget->DispatchEvent(&queryEditorRectEvent, status);
if (NS_WARN_IF(queryEditorRectEvent.Failed())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheEditorRect(), FAILED, "
"couldn't retrieve the editor rect",
this));
return false;
}
mEditorRect = queryEditorRectEvent.mReply->mRect;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheEditorRect(), Succeeded, "
"mEditorRect=%s",
this, ToString(mEditorRect).c_str()));
return true;
}
bool ContentCacheInChild::CacheText(nsIWidget* aWidget,
const IMENotification* aNotification) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheText(aWidget=0x%p, aNotification=%s)", this, aWidget,
GetNotificationName(aNotification)));
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent queryTextContentEvent(true, eQueryTextContent,
aWidget);
queryTextContentEvent.InitForQueryTextContent(0, UINT32_MAX);
aWidget->DispatchEvent(&queryTextContentEvent, status);
if (NS_WARN_IF(queryTextContentEvent.Failed())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheText(), FAILED, couldn't retrieve whole text", this));
mText.Truncate();
return false;
}
mText = queryTextContentEvent.mReply->DataRef();
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheText(), Succeeded, mText.Length()=%zu", this,
mText.Length()));
// Forget last commit range if string in the range is different from the
// last commit string.
if (mLastCommit.isSome() &&
nsDependentSubstring(mText, mLastCommit->StartOffset(),
mLastCommit->Length()) != mLastCommit->DataRef()) {
MOZ_LOG(sContentCacheLog, LogLevel::Debug,
("0x%p CacheText(), resetting the last composition string data "
"(mLastCommit=%s, current string=\"%s\")",
this, ToString(mLastCommit).c_str(),
PrintStringDetail(
nsDependentSubstring(mText, mLastCommit->StartOffset(),
mLastCommit->Length()),
PrintStringDetail::kMaxLengthForCompositionString)
.get()));
mLastCommit.reset();
}
return CacheSelection(aWidget, aNotification);
}
bool ContentCacheInChild::QueryCharRect(nsIWidget* aWidget, uint32_t aOffset,
LayoutDeviceIntRect& aCharRect) const {
aCharRect.SetEmpty();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent queryTextRectEvent(true, eQueryTextRect, aWidget);
queryTextRectEvent.InitForQueryTextRect(aOffset, 1);
aWidget->DispatchEvent(&queryTextRectEvent, status);
if (NS_WARN_IF(queryTextRectEvent.Failed())) {
return false;
}
aCharRect = queryTextRectEvent.mReply->mRect;
// Guarantee the rect is not empty.
if (NS_WARN_IF(!aCharRect.Height())) {
aCharRect.SetHeight(1);
}
if (NS_WARN_IF(!aCharRect.Width())) {
aCharRect.SetWidth(1);
}
return true;
}
bool ContentCacheInChild::QueryCharRectArray(nsIWidget* aWidget,
uint32_t aOffset, uint32_t aLength,
RectArray& aCharRectArray) const {
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent queryTextRectsEvent(true, eQueryTextRectArray,
aWidget);
queryTextRectsEvent.InitForQueryTextRectArray(aOffset, aLength);
aWidget->DispatchEvent(&queryTextRectsEvent, status);
if (NS_WARN_IF(queryTextRectsEvent.Failed())) {
aCharRectArray.Clear();
return false;
}
aCharRectArray = std::move(queryTextRectsEvent.mReply->mRectArray);
return true;
}
bool ContentCacheInChild::CacheTextRects(nsIWidget* aWidget,
const IMENotification* aNotification) {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p CacheTextRects(aWidget=0x%p, aNotification=%s), mCaret=%s", this,
aWidget, GetNotificationName(aNotification), ToString(mCaret).c_str()));
mCompositionStart.reset();
mTextRectArray.reset();
mLastCommitStringTextRectArray.reset();
mFirstCharRect.SetEmpty();
if (NS_WARN_IF(mSelection.isNothing())) {
return false;
}
mSelection->ClearRects();
// Retrieve text rects in composition string if there is.
RefPtr<TextComposition> textComposition =
IMEStateManager::GetTextCompositionFor(aWidget);
if (textComposition) {
// mCompositionStart may be updated by some composition event handlers.
// So, let's update it with the latest information.
mCompositionStart = Some(textComposition->NativeOffsetOfStartComposition());
// Note that TextComposition::String() may not be modified here because
// it's modified after all edit action listeners are performed but this
// is called while some of them are performed.
// FYI: For supporting IME which commits composition and restart new
// composition immediately, we should cache next character of current
// composition too.
uint32_t length = textComposition->LastData().Length() + 1;
mTextRectArray.emplace(mCompositionStart.value());
if (NS_WARN_IF(!QueryCharRectArray(aWidget, mTextRectArray->mStart, length,
mTextRectArray->mRects))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve text rect array of the composition string",
this));
mTextRectArray.reset();
}
}
if (mTextRectArray.isSome() &&
mTextRectArray->IsOffsetInRange(mSelection->mAnchor) &&
(!mSelection->mAnchor ||
mTextRectArray->IsOffsetInRange(mSelection->mAnchor - 1))) {
mSelection->mAnchorCharRects[eNextCharRect] =
mTextRectArray->GetRect(mSelection->mAnchor);
if (mSelection->mAnchor) {
mSelection->mAnchorCharRects[ePrevCharRect] =
mTextRectArray->GetRect(mSelection->mAnchor - 1);
}
} else {
RectArray rects;
uint32_t startOffset = mSelection->mAnchor ? mSelection->mAnchor - 1 : 0;
uint32_t length = mSelection->mAnchor ? 2 : 1;
if (NS_WARN_IF(!QueryCharRectArray(aWidget, startOffset, length, rects))) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve text rect array around the selection anchor (%u)",
this, mSelection->mAnchor));
MOZ_ASSERT(mSelection->mAnchorCharRects[ePrevCharRect].IsEmpty());
MOZ_ASSERT(mSelection->mAnchorCharRects[eNextCharRect].IsEmpty());
} else {
if (rects.Length() > 1) {
mSelection->mAnchorCharRects[ePrevCharRect] = rects[0];
mSelection->mAnchorCharRects[eNextCharRect] = rects[1];
} else if (rects.Length()) {
mSelection->mAnchorCharRects[eNextCharRect] = rects[0];
MOZ_ASSERT(mSelection->mAnchorCharRects[ePrevCharRect].IsEmpty());
}
}
}
if (mSelection->Collapsed()) {
mSelection->mFocusCharRects[0] = mSelection->mAnchorCharRects[0];
mSelection->mFocusCharRects[1] = mSelection->mAnchorCharRects[1];
} else if (mTextRectArray.isSome() &&
mTextRectArray->IsOffsetInRange(mSelection->mFocus) &&
(!mSelection->mFocus ||
mTextRectArray->IsOffsetInRange(mSelection->mFocus - 1))) {
mSelection->mFocusCharRects[eNextCharRect] =
mTextRectArray->GetRect(mSelection->mFocus);
if (mSelection->mFocus) {
mSelection->mFocusCharRects[ePrevCharRect] =
mTextRectArray->GetRect(mSelection->mFocus - 1);
}
} else {
RectArray rects;
uint32_t startOffset = mSelection->mFocus ? mSelection->mFocus - 1 : 0;
uint32_t length = mSelection->mFocus ? 2 : 1;
if (NS_WARN_IF(!QueryCharRectArray(aWidget, startOffset, length, rects))) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve text rect array around the selection focus (%u)",
this, mSelection->mFocus));
MOZ_ASSERT(mSelection->mFocusCharRects[ePrevCharRect].IsEmpty());
MOZ_ASSERT(mSelection->mFocusCharRects[eNextCharRect].IsEmpty());
} else {
if (rects.Length() > 1) {
mSelection->mFocusCharRects[ePrevCharRect] = rects[0];
mSelection->mFocusCharRects[eNextCharRect] = rects[1];
} else if (rects.Length()) {
mSelection->mFocusCharRects[eNextCharRect] = rects[0];
MOZ_ASSERT(mSelection->mFocusCharRects[ePrevCharRect].IsEmpty());
}
}
}
if (!mSelection->Collapsed()) {
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent queryTextRectEvent(true, eQueryTextRect, aWidget);
queryTextRectEvent.InitForQueryTextRect(mSelection->StartOffset(),
mSelection->Length());
aWidget->DispatchEvent(&queryTextRectEvent, status);
if (NS_WARN_IF(queryTextRectEvent.Failed())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve text rect of whole selected text",
this));
} else {
mSelection->mRect = queryTextRectEvent.mReply->mRect;
}
}
if (!mSelection->mFocus) {
mFirstCharRect = mSelection->mFocusCharRects[eNextCharRect];
} else if (mSelection->mFocus == 1) {
mFirstCharRect = mSelection->mFocusCharRects[ePrevCharRect];
} else if (!mSelection->mAnchor) {
mFirstCharRect = mSelection->mAnchorCharRects[eNextCharRect];
} else if (mSelection->mAnchor == 1) {
mFirstCharRect = mSelection->mFocusCharRects[ePrevCharRect];
} else if (mTextRectArray.isSome() && mTextRectArray->IsOffsetInRange(0)) {
mFirstCharRect = mTextRectArray->GetRect(0);
} else {
LayoutDeviceIntRect charRect;
if (NS_WARN_IF(!QueryCharRect(aWidget, 0, charRect))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve first char rect",
this));
} else {
mFirstCharRect = charRect;
}
}
if (mLastCommit.isSome()) {
mLastCommitStringTextRectArray.emplace(mLastCommit->StartOffset());
if (mLastCommit->Length() == 1) {
MOZ_ASSERT(mSelection->Collapsed());
MOZ_ASSERT(mSelection->mAnchor - 1 == mLastCommit->StartOffset());
mLastCommitStringTextRectArray->mRects.AppendElement(
mSelection->mAnchorCharRects[ePrevCharRect]);
} else if (NS_WARN_IF(!QueryCharRectArray(
aWidget, mLastCommit->StartOffset(), mLastCommit->Length(),
mLastCommitStringTextRectArray->mRects))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve text rect array of the last commit string",
this));
mLastCommitStringTextRectArray.reset();
mLastCommit.reset();
}
MOZ_ASSERT((mLastCommitStringTextRectArray.isSome()
? mLastCommitStringTextRectArray->mRects.Length()
: 0) == (mLastCommit.isSome() ? mLastCommit->Length() : 0));
}
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheTextRects(), Succeeded, "
"mText.Length()=%zx, mTextRectArray=%s, mSelection=%s, "
"mFirstCharRect=%s, mLastCommitStringTextRectArray=%s",
this, mText.Length(), ToString(mTextRectArray).c_str(),
ToString(mSelection).c_str(), ToString(mFirstCharRect).c_str(),
ToString(mLastCommitStringTextRectArray).c_str()));
return true;
}
void ContentCacheInChild::SetSelection(nsIWidget* aWidget,
uint32_t aStartOffset, uint32_t aLength,
bool aReversed,
const WritingMode& aWritingMode) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p SetSelection(aStartOffset=%u, "
"aLength=%u, aReversed=%s, aWritingMode=%s), mText.Length()=%zu",
this, aStartOffset, aLength, GetBoolName(aReversed),
ToString(aWritingMode).c_str(), mText.Length()));
mSelection = Some(Selection(
!aReversed ? aStartOffset : aStartOffset + aLength,
!aReversed ? aStartOffset + aLength : aStartOffset, aWritingMode));
if (mLastCommit.isSome()) {
// Forget last commit string range if selection is not collapsed
// at end of the last commit string.
if (!mSelection->Collapsed() ||
mSelection->mAnchor != mLastCommit->EndOffset()) {
MOZ_LOG(
sContentCacheLog, LogLevel::Debug,
("0x%p SetSelection(), forgetting last commit composition data "
"(mSelection=%s, mLastCommit=%s)",
this, ToString(mSelection).c_str(), ToString(mLastCommit).c_str()));
mLastCommit.reset();
}
}
if (NS_WARN_IF(!CacheCaret(aWidget))) {
return;
}
Unused << NS_WARN_IF(!CacheTextRects(aWidget));
}
/*****************************************************************************
* mozilla::ContentCacheInParent
*****************************************************************************/
ContentCacheInParent::ContentCacheInParent(BrowserParent& aBrowserParent)
: ContentCache(),
mBrowserParent(aBrowserParent),
mCommitStringByRequest(nullptr),
mPendingEventsNeedingAck(0),
mPendingCommitLength(0),
mPendingCompositionCount(0),
mPendingCommitCount(0),
mWidgetHasComposition(false),
mIsChildIgnoringCompositionEvents(false) {}
void ContentCacheInParent::AssignContent(const ContentCache& aOther,
nsIWidget* aWidget,
const IMENotification* aNotification) {
mText = aOther.mText;
mSelection = aOther.mSelection;
mFirstCharRect = aOther.mFirstCharRect;
mCaret = aOther.mCaret;
mTextRectArray = aOther.mTextRectArray;
mLastCommitStringTextRectArray = aOther.mLastCommitStringTextRectArray;
mEditorRect = aOther.mEditorRect;
// Only when there is one composition, the TextComposition instance in this
// process is managing the composition in the remote process. Therefore,
// we shouldn't update composition start offset of TextComposition with
// old composition which is still being handled by the child process.
if (mWidgetHasComposition && mPendingCompositionCount == 1 &&
mCompositionStart.isSome()) {
IMEStateManager::MaybeStartOffsetUpdatedInChild(aWidget,
mCompositionStart.value());
}
// When this instance allows to query content relative to composition string,
// we should modify mCompositionStart with the latest information in the
// remote process because now we have the information around the composition
// string.
mCompositionStartInChild = aOther.mCompositionStart;
if (mWidgetHasComposition || mPendingCommitCount) {
if (mCompositionStartInChild.isSome()) {
if (mCompositionStart.valueOr(UINT32_MAX) !=
mCompositionStartInChild.value()) {
mCompositionStart = mCompositionStartInChild;
mPendingCommitLength = 0;
}
} else if (mCompositionStart.isSome() && mSelection.isSome() &&
mCompositionStart.value() != mSelection->StartOffset()) {
mCompositionStart = Some(mSelection->StartOffset());
mPendingCommitLength = 0;
}
}
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p AssignContent(aNotification=%s), "
"Succeeded, mText.Length()=%zu, mSelection=%s, mFirstCharRect=%s, "
"mCaret=%s, mTextRectArray=%s, mWidgetHasComposition=%s, "
"mPendingCompositionCount=%u, mCompositionStart=%s, "
"mPendingCommitLength=%u, mEditorRect=%s, "
"mLastCommitStringTextRectArray=%s",
this, GetNotificationName(aNotification), mText.Length(),
ToString(mSelection).c_str(), ToString(mFirstCharRect).c_str(),
ToString(mCaret).c_str(), ToString(mTextRectArray).c_str(),
GetBoolName(mWidgetHasComposition), mPendingCompositionCount,
ToString(mCompositionStart).c_str(), mPendingCommitLength,
ToString(mEditorRect).c_str(),
ToString(mLastCommitStringTextRectArray).c_str()));
}
bool ContentCacheInParent::HandleQueryContentEvent(
WidgetQueryContentEvent& aEvent, nsIWidget* aWidget) const {
MOZ_ASSERT(aWidget);
// ContentCache doesn't store offset of its start with XP linebreaks.
// So, we don't support to query contents relative to composition start
// offset with XP linebreaks.
if (NS_WARN_IF(!aEvent.mUseNativeLineBreak)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to query with XP "
"linebreaks",
this));
return false;
}
if (NS_WARN_IF(!aEvent.mInput.IsValidOffset())) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to invalid offset", this));
return false;
}
if (NS_WARN_IF(!aEvent.mInput.IsValidEventMessage(aEvent.mMessage))) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to invalid event message",
this));
return false;
}
bool isRelativeToInsertionPoint = aEvent.mInput.mRelativeToInsertionPoint;
if (isRelativeToInsertionPoint) {
MOZ_LOG(sContentCacheLog, LogLevel::Debug,
("0x%p HandleQueryContentEvent(), "
"making offset absolute... aEvent={ mMessage=%s, mInput={ "
"mOffset=%" PRId64 ", mLength=%" PRIu32 " } }, "
"mWidgetHasComposition=%s, mPendingCommitCount=%" PRIu8
", mCompositionStart=%" PRIu32 ", "
"mPendingCommitLength=%" PRIu32 ", mSelection=%s",
this, ToChar(aEvent.mMessage), aEvent.mInput.mOffset,
aEvent.mInput.mLength, GetBoolName(mWidgetHasComposition),
mPendingCommitCount, mCompositionStart.valueOr(UINT32_MAX),
mPendingCommitLength, ToString(mSelection).c_str()));
if (mWidgetHasComposition || mPendingCommitCount) {
if (NS_WARN_IF(mCompositionStart.isNothing()) ||
NS_WARN_IF(!aEvent.mInput.MakeOffsetAbsolute(
mCompositionStart.value() + mPendingCommitLength))) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to "
"aEvent.mInput.MakeOffsetAbsolute(mCompositionStart + "
"mPendingCommitLength) failure, "
"mCompositionStart=%" PRIu32 ", mPendingCommitLength=%" PRIu32 ", "
"aEvent={ mMessage=%s, mInput={ mOffset=%" PRId64
", mLength=%" PRIu32 " } }",
this, mCompositionStart.valueOr(UINT32_MAX), mPendingCommitLength,
ToChar(aEvent.mMessage), aEvent.mInput.mOffset,
aEvent.mInput.mLength));
return false;
}
} else if (NS_WARN_IF(mSelection.isNothing())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to mSelection is "
"not set",
this));
return false;
} else if (NS_WARN_IF(!aEvent.mInput.MakeOffsetAbsolute(
mSelection->StartOffset() + mPendingCommitLength))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to "
"aEvent.mInput.MakeOffsetAbsolute(mSelection.StartOffset() + "
"mPendingCommitLength) failure, mSelection=%s, "
"mPendingCommitLength=%" PRIu32 ", aEvent={ mMessage=%s, "
"mInput={ mOffset=%" PRId64 ", mLength=%" PRIu32 " } }",
this, ToString(mSelection).c_str(), mPendingCommitLength,
ToChar(aEvent.mMessage), aEvent.mInput.mOffset,
aEvent.mInput.mLength));
return false;
}
}
switch (aEvent.mMessage) {
case eQuerySelectedText:
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(aEvent={ "
"mMessage=eQuerySelectedText }, aWidget=0x%p)",
this, aWidget));
if (NS_WARN_IF(!IsSelectionValid())) {
// If content cache hasn't been initialized properly, make the query
// failed.
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED because mSelection is "
"not valid",
this));
return false;
}
if (!mSelection->Collapsed() &&
NS_WARN_IF(mSelection->EndOffset() > mText.Length())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED because "
"mSelection->EndOffset()=%u is larger than mText.Length()=%zu",
this, mSelection->EndOffset(), mText.Length()));
return false;
}
aEvent.EmplaceReply();
aEvent.mReply->mFocusedWidget = aWidget;
aEvent.mReply->mOffsetAndData.emplace(
mSelection->StartOffset(),
Substring(mText, mSelection->StartOffset(), mSelection->Length()),
OffsetAndDataFor::SelectedString);
aEvent.mReply->mReversed = mSelection->Reversed();
aEvent.mReply->mHasSelection = true;
aEvent.mReply->mWritingMode = mSelection->mWritingMode;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), "
"Succeeded, aEvent={ mMessage=eQuerySelectedText, mReply=%s }",
this, ToString(aEvent.mReply).c_str()));
return true;
case eQueryTextContent: {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent("
"aEvent={ mMessage=eQueryTextContent, mInput={ mOffset=%" PRId64
", mLength=%u } }, aWidget=0x%p), mText.Length()=%zu",
this, aEvent.mInput.mOffset, aEvent.mInput.mLength, aWidget,
mText.Length()));
uint32_t inputOffset = aEvent.mInput.mOffset;
uint32_t inputEndOffset =
std::min<uint32_t>(aEvent.mInput.EndOffset(), mText.Length());
if (NS_WARN_IF(inputEndOffset < inputOffset)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED because "
"inputOffset=%u is larger than inputEndOffset=%u",
this, inputOffset, inputEndOffset));
return false;
}
aEvent.EmplaceReply();
aEvent.mReply->mFocusedWidget = aWidget;
aEvent.mReply->mOffsetAndData.emplace(
inputOffset,
Substring(mText, inputOffset, inputEndOffset - inputOffset),
OffsetAndDataFor::EditorString);
// TODO: Support font ranges
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), Succeeded, aEvent={ "
"mMessage=eQueryTextContent, mReply=%s }",
this, ToString(aEvent.mReply).c_str()));
return true;
}
case eQueryTextRect: {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent("
"aEvent={ mMessage=eQueryTextRect, mInput={ mOffset=%" PRId64
", mLength=%u } }, aWidget=0x%p), mText.Length()=%zu",
this, aEvent.mInput.mOffset, aEvent.mInput.mLength, aWidget,
mText.Length()));
if (NS_WARN_IF(!IsSelectionValid())) {
// If content cache hasn't been initialized properly, make the query
// failed.
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED because mSelection is "
"not valid",
this));
return false;
}
// Note that if the query is relative to insertion point, the query was
// probably requested by native IME. In such case, we should return
// non-empty rect since returning failure causes IME showing its window
// at odd position.
LayoutDeviceIntRect textRect;
if (aEvent.mInput.mLength) {
if (NS_WARN_IF(
!GetUnionTextRects(aEvent.mInput.mOffset, aEvent.mInput.mLength,
isRelativeToInsertionPoint, textRect))) {
// XXX We don't have cache for this request.
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED to get union rect",
this));
return false;
}
} else {
// If the length is 0, we should return caret rect instead.
if (NS_WARN_IF(!GetCaretRect(aEvent.mInput.mOffset,
isRelativeToInsertionPoint, textRect))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED to get caret rect",
this));
return false;
}
}
aEvent.EmplaceReply();
aEvent.mReply->mFocusedWidget = aWidget;
aEvent.mReply->mRect = textRect;
aEvent.mReply->mOffsetAndData.emplace(
aEvent.mInput.mOffset,
aEvent.mInput.mOffset < int64_t(mText.Length())
? static_cast<const nsAString&>(
Substring(mText, aEvent.mInput.mOffset,
mText.Length() >= aEvent.mInput.EndOffset()
? aEvent.mInput.mLength
: UINT32_MAX))
: static_cast<const nsAString&>(EmptyString()),
OffsetAndDataFor::EditorString);
// XXX This may be wrong if storing range isn't in the selection range.
aEvent.mReply->mWritingMode = mSelection->mWritingMode;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), Succeeded, aEvent={ "
"mMessage=eQueryTextRect mReply=%s }",
this, ToString(aEvent.mReply).c_str()));
return true;
}
case eQueryCaretRect: {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(aEvent={ mMessage=eQueryCaretRect, "
"mInput={ mOffset=%" PRId64
" } }, aWidget=0x%p), mText.Length()=%zu",
this, aEvent.mInput.mOffset, aWidget, mText.Length()));
if (NS_WARN_IF(!IsSelectionValid())) {
// If content cache hasn't been initialized properly, make the query
// failed.
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED because mSelection is "
"not valid",
this));
return false;
}
// Note that if the query is relative to insertion point, the query was
// probably requested by native IME. In such case, we should return
// non-empty rect since returning failure causes IME showing its window
// at odd position.
LayoutDeviceIntRect caretRect;
if (NS_WARN_IF(!GetCaretRect(aEvent.mInput.mOffset,
isRelativeToInsertionPoint, caretRect))) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(),FAILED to get caret rect", this));
return false;
}
aEvent.EmplaceReply();
aEvent.mReply->mFocusedWidget = aWidget;
aEvent.mReply->mRect = caretRect;
aEvent.mReply->mOffsetAndData.emplace(aEvent.mInput.mOffset,
EmptyString(),
OffsetAndDataFor::SelectedString);
// TODO: Set mWritingMode here
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), Succeeded, aEvent={ "
"mMessage=eQueryCaretRect, mReply=%s }",
this, ToString(aEvent.mReply).c_str()));
return true;
}
case eQueryEditorRect:
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(aEvent={ "
"mMessage=eQueryEditorRect }, aWidget=0x%p)",
this, aWidget));
aEvent.EmplaceReply();
aEvent.mReply->mFocusedWidget = aWidget;
aEvent.mReply->mRect = mEditorRect;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), Succeeded, aEvent={ "
"mMessage=eQueryEditorRect, mReply=%s }",
this, ToString(aEvent.mReply).c_str()));
return true;
default:
aEvent.EmplaceReply();
aEvent.mReply->mFocusedWidget = aWidget;
if (NS_WARN_IF(aEvent.Failed())) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to not set enough "
"data, aEvent={ mMessage=%s, mReply=%s }",
this, ToChar(aEvent.mMessage), ToString(aEvent.mReply).c_str()));
return false;
}
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), Succeeded, aEvent={ "
"mMessage=%s, mReply=%s }",
this, ToChar(aEvent.mMessage), ToString(aEvent.mReply).c_str()));
return true;
}
}
bool ContentCacheInParent::GetTextRect(uint32_t aOffset,
bool aRoundToExistingOffset,
LayoutDeviceIntRect& aTextRect) const {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p GetTextRect(aOffset=%u, aRoundToExistingOffset=%s), "
"mTextRectArray=%s, mSelection=%s, mLastCommitStringTextRectArray=%s",
this, aOffset, GetBoolName(aRoundToExistingOffset),
ToString(mTextRectArray).c_str(), ToString(mSelection).c_str(),
ToString(mLastCommitStringTextRectArray).c_str()));
if (!aOffset) {
NS_WARNING_ASSERTION(!mFirstCharRect.IsEmpty(), "empty rect");
aTextRect = mFirstCharRect;
return !aTextRect.IsEmpty();
}
if (mSelection.isSome()) {
if (aOffset == mSelection->mAnchor) {
NS_WARNING_ASSERTION(
!mSelection->mAnchorCharRects[eNextCharRect].IsEmpty(), "empty rect");
aTextRect = mSelection->mAnchorCharRects[eNextCharRect];
return !aTextRect.IsEmpty();
}
if (mSelection->mAnchor && aOffset == mSelection->mAnchor - 1) {
NS_WARNING_ASSERTION(
!mSelection->mAnchorCharRects[ePrevCharRect].IsEmpty(), "empty rect");
aTextRect = mSelection->mAnchorCharRects[ePrevCharRect];
return !aTextRect.IsEmpty();
}
if (aOffset == mSelection->mFocus) {
NS_WARNING_ASSERTION(
!mSelection->mFocusCharRects[eNextCharRect].IsEmpty(), "empty rect");
aTextRect = mSelection->mFocusCharRects[eNextCharRect];
return !aTextRect.IsEmpty();
}
if (mSelection->mFocus && aOffset == mSelection->mFocus - 1) {
NS_WARNING_ASSERTION(
!mSelection->mFocusCharRects[ePrevCharRect].IsEmpty(), "empty rect");
aTextRect = mSelection->mFocusCharRects[ePrevCharRect];
return !aTextRect.IsEmpty();
}
}
if (mTextRectArray.isSome() && mTextRectArray->IsOffsetInRange(aOffset)) {
aTextRect = mTextRectArray->GetRect(aOffset);
return !aTextRect.IsEmpty();
}
if (mLastCommitStringTextRectArray.isSome() &&
mLastCommitStringTextRectArray->IsOffsetInRange(aOffset)) {
aTextRect = mLastCommitStringTextRectArray->GetRect(aOffset);
return !aTextRect.IsEmpty();
}
if (!aRoundToExistingOffset) {
aTextRect.SetEmpty();
return false;
}
if (mTextRectArray.isNothing() || !mTextRectArray->HasRects()) {
// If there are no rects in mTextRectArray, we should refer the start of
// the selection because IME must query a char rect around it if there is
// no composition.
aTextRect = mSelection->StartCharRect();
return !aTextRect.IsEmpty();
}
// Although we may have mLastCommitStringTextRectArray here and it must have
// previous character rects at selection. However, we should stop using it
// because it's stored really short time after commiting a composition.
// So, multiple query may return different rect and it may cause flickerling
// the IME UI.
uint32_t offset = aOffset;
if (offset < mTextRectArray->StartOffset()) {
offset = mTextRectArray->StartOffset();
} else {
offset = mTextRectArray->EndOffset() - 1;
}
aTextRect = mTextRectArray->GetRect(offset);
return !aTextRect.IsEmpty();
}
bool ContentCacheInParent::GetUnionTextRects(
uint32_t aOffset, uint32_t aLength, bool aRoundToExistingOffset,
LayoutDeviceIntRect& aUnionTextRect) const {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p GetUnionTextRects(aOffset=%u, "
"aLength=%u, aRoundToExistingOffset=%s), mTextRectArray=%s, "
"mSelection=%s, mLastCommitStringTextRectArray=%s",
this, aOffset, aLength, GetBoolName(aRoundToExistingOffset),
ToString(mTextRectArray).c_str(), ToString(mSelection).c_str(),
ToString(mLastCommitStringTextRectArray).c_str()));
CheckedInt<uint32_t> endOffset = CheckedInt<uint32_t>(aOffset) + aLength;
if (!endOffset.isValid()) {
return false;
}
if (mSelection.isSome() && !mSelection->Collapsed() &&
aOffset == mSelection->StartOffset() && aLength == mSelection->Length()) {
NS_WARNING_ASSERTION(!mSelection->mRect.IsEmpty(), "empty rect");
aUnionTextRect = mSelection->mRect;
return !aUnionTextRect.IsEmpty();
}
if (aLength == 1) {
if (!aOffset) {
NS_WARNING_ASSERTION(!mFirstCharRect.IsEmpty(), "empty rect");
aUnionTextRect = mFirstCharRect;
return !aUnionTextRect.IsEmpty();
}
if (mSelection.isSome()) {
if (aOffset == mSelection->mAnchor) {
NS_WARNING_ASSERTION(
!mSelection->mAnchorCharRects[eNextCharRect].IsEmpty(),
"empty rect");
aUnionTextRect = mSelection->mAnchorCharRects[eNextCharRect];
return !aUnionTextRect.IsEmpty();
}
if (mSelection->mAnchor && aOffset == mSelection->mAnchor - 1) {
NS_WARNING_ASSERTION(
!mSelection->mAnchorCharRects[ePrevCharRect].IsEmpty(),
"empty rect");
aUnionTextRect = mSelection->mAnchorCharRects[ePrevCharRect];
return !aUnionTextRect.IsEmpty();
}
if (aOffset == mSelection->mFocus) {
NS_WARNING_ASSERTION(
!mSelection->mFocusCharRects[eNextCharRect].IsEmpty(),
"empty rect");
aUnionTextRect = mSelection->mFocusCharRects[eNextCharRect];
return !aUnionTextRect.IsEmpty();
}
if (mSelection->mFocus && aOffset == mSelection->mFocus - 1) {
NS_WARNING_ASSERTION(
!mSelection->mFocusCharRects[ePrevCharRect].IsEmpty(),
"empty rect");
aUnionTextRect = mSelection->mFocusCharRects[ePrevCharRect];
return !aUnionTextRect.IsEmpty();
}
}
}
// Even if some text rects are not cached of the queried range,
// we should return union rect when the first character's rect is cached
// since the first character rect is important and the others are not so
// in most cases.
if (!aOffset && mSelection.isSome() && aOffset != mSelection->mAnchor &&
aOffset != mSelection->mFocus &&
(mTextRectArray.isNothing() ||
!mTextRectArray->IsOffsetInRange(aOffset)) &&
(mLastCommitStringTextRectArray.isNothing() ||
!mLastCommitStringTextRectArray->IsOffsetInRange(aOffset))) {
// The first character rect isn't cached.
return false;
}
// Use mLastCommitStringTextRectArray only when it overlaps with aOffset
// even if aROundToExistingOffset is true for avoiding flickerling IME UI.
// See the last comment in GetTextRect() for the detail.
if (mLastCommitStringTextRectArray.isSome() &&
mLastCommitStringTextRectArray->IsOverlappingWith(aOffset, aLength)) {
aUnionTextRect =
mLastCommitStringTextRectArray->GetUnionRectAsFarAsPossible(
aOffset, aLength, aRoundToExistingOffset);
} else {
aUnionTextRect.SetEmpty();
}
if (mTextRectArray.isSome() &&
((aRoundToExistingOffset && mTextRectArray->HasRects()) ||
mTextRectArray->IsOverlappingWith(aOffset, aLength))) {
aUnionTextRect =
aUnionTextRect.Union(mTextRectArray->GetUnionRectAsFarAsPossible(
aOffset, aLength, aRoundToExistingOffset));
}
if (!aOffset) {
aUnionTextRect = aUnionTextRect.Union(mFirstCharRect);
}
if (mSelection.isSome()) {
if (aOffset <= mSelection->mAnchor &&
mSelection->mAnchor < endOffset.value()) {
aUnionTextRect =
aUnionTextRect.Union(mSelection->mAnchorCharRects[eNextCharRect]);
}
if (mSelection->mAnchor && aOffset <= mSelection->mAnchor - 1 &&
mSelection->mAnchor - 1 < endOffset.value()) {
aUnionTextRect =
aUnionTextRect.Union(mSelection->mAnchorCharRects[ePrevCharRect]);
}
if (aOffset <= mSelection->mFocus &&
mSelection->mFocus < endOffset.value()) {
aUnionTextRect =
aUnionTextRect.Union(mSelection->mFocusCharRects[eNextCharRect]);
}
if (mSelection->mFocus && aOffset <= mSelection->mFocus - 1 &&
mSelection->mFocus - 1 < endOffset.value()) {
aUnionTextRect =
aUnionTextRect.Union(mSelection->mFocusCharRects[ePrevCharRect]);
}
}
return !aUnionTextRect.IsEmpty();
}
bool ContentCacheInParent::GetCaretRect(uint32_t aOffset,
bool aRoundToExistingOffset,
LayoutDeviceIntRect& aCaretRect) const {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p GetCaretRect(aOffset=%u, aRoundToExistingOffset=%s), "
"mCaret=%s, mTextRectArray=%s, mSelection=%s, mFirstCharRect=%s",
this, aOffset, GetBoolName(aRoundToExistingOffset),
ToString(mCaret).c_str(), ToString(mTextRectArray).c_str(),
ToString(mSelection).c_str(), ToString(mFirstCharRect).c_str()));
if (mCaret.isSome() && mCaret->mOffset == aOffset) {
aCaretRect = mCaret->mRect;
return true;
}
// Guess caret rect from the text rect if it's stored.
if (!GetTextRect(aOffset, aRoundToExistingOffset, aCaretRect)) {
// There might be previous character rect in the cache. If so, we can
// guess the caret rect with it.
if (!aOffset ||
!GetTextRect(aOffset - 1, aRoundToExistingOffset, aCaretRect)) {
aCaretRect.SetEmpty();
return false;
}
if (mSelection.isSome() && mSelection->mWritingMode.IsVertical()) {
aCaretRect.MoveToY(aCaretRect.YMost());
} else {
// XXX bidi-unaware.
aCaretRect.MoveToX(aCaretRect.XMost());
}
}
// XXX This is not bidi aware because we don't cache each character's
// direction. However, this is usually used by IME, so, assuming the
// character is in LRT context must not cause any problem.
if (mSelection.isSome() && mSelection->mWritingMode.IsVertical()) {
aCaretRect.SetHeight(mCaret.isSome() ? mCaret->mRect.Height() : 1);
} else {
aCaretRect.SetWidth(mCaret.isSome() ? mCaret->mRect.Width() : 1);
}
return true;
}
bool ContentCacheInParent::OnCompositionEvent(
const WidgetCompositionEvent& aEvent) {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p OnCompositionEvent(aEvent={ "
"mMessage=%s, mData=\"%s\" (Length()=%zu), mRanges->Length()=%zu }), "
"mPendingEventsNeedingAck=%u, mWidgetHasComposition=%s, "
"mPendingCompositionCount=%" PRIu8 ", mPendingCommitCount=%" PRIu8 ", "
"mIsChildIgnoringCompositionEvents=%s, mCommitStringByRequest=0x%p",
this, ToChar(aEvent.mMessage),
PrintStringDetail(aEvent.mData,
PrintStringDetail::kMaxLengthForCompositionString)
.get(),
aEvent.mData.Length(), aEvent.mRanges ? aEvent.mRanges->Length() : 0,
mPendingEventsNeedingAck, GetBoolName(mWidgetHasComposition),
mPendingCompositionCount, mPendingCommitCount,
GetBoolName(mIsChildIgnoringCompositionEvents), mCommitStringByRequest));
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mDispatchedEventMessages.AppendElement(aEvent.mMessage);
#endif // #ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
// We must be able to simulate the selection because
// we might not receive selection updates in time
if (!mWidgetHasComposition) {
if (mCompositionStartInChild.isSome()) {
// If there is pending composition in the remote process, let's use
// its start offset temporarily because this stores a lot of information
// around it and the user must look around there, so, showing some UI
// around it must make sense.
mCompositionStart = mCompositionStartInChild;
} else {
mCompositionStart =
Some(mSelection.isSome() ? mSelection->StartOffset() : 0);
}
MOZ_ASSERT(aEvent.mMessage == eCompositionStart);
MOZ_RELEASE_ASSERT(mPendingCompositionCount < UINT8_MAX);
mPendingCompositionCount++;
}
mWidgetHasComposition = !aEvent.CausesDOMCompositionEndEvent();
if (!mWidgetHasComposition) {
// mCompositionStart will be reset when commit event is completely handled
// in the remote process.
if (mPendingCompositionCount == 1) {
mPendingCommitLength = aEvent.mData.Length();
}
mPendingCommitCount++;
} else if (aEvent.mMessage != eCompositionStart) {
mCompositionString = aEvent.mData;
}
// During REQUEST_TO_COMMIT_COMPOSITION or REQUEST_TO_CANCEL_COMPOSITION,
// widget usually sends a eCompositionChange and/or eCompositionCommit event
// to finalize or clear the composition, respectively. In this time,
// we need to intercept all composition events here and pass the commit
// string for returning to the remote process as a result of
// RequestIMEToCommitComposition(). Then, eCommitComposition event will
// be dispatched with the committed string in the remote process internally.
if (mCommitStringByRequest) {
if (aEvent.mMessage == eCompositionCommitAsIs) {
*mCommitStringByRequest = mCompositionString;
} else {
MOZ_ASSERT(aEvent.mMessage == eCompositionChange ||
aEvent.mMessage == eCompositionCommit);
*mCommitStringByRequest = aEvent.mData;
}
// We need to wait eCompositionCommitRequestHandled from the remote process
// in this case. Therefore, mPendingEventsNeedingAck needs to be
// incremented here. Additionally, we stop sending eCompositionCommit(AsIs)
// event. Therefore, we need to decrement mPendingCommitCount which has
// been incremented above.
if (!mWidgetHasComposition) {
mPendingEventsNeedingAck++;
MOZ_DIAGNOSTIC_ASSERT(mPendingCommitCount);
if (mPendingCommitCount) {
mPendingCommitCount--;
}
}
return false;
}
mPendingEventsNeedingAck++;
return true;
}
void ContentCacheInParent::OnSelectionEvent(
const WidgetSelectionEvent& aSelectionEvent) {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p OnSelectionEvent(aEvent={ "
"mMessage=%s, mOffset=%u, mLength=%u, mReversed=%s, "
"mExpandToClusterBoundary=%s, mUseNativeLineBreak=%s }), "
"mPendingEventsNeedingAck=%u, mWidgetHasComposition=%s, "
"mPendingCompositionCount=%" PRIu8 ", mPendingCommitCount=%" PRIu8 ", "
"mIsChildIgnoringCompositionEvents=%s",
this, ToChar(aSelectionEvent.mMessage), aSelectionEvent.mOffset,
aSelectionEvent.mLength, GetBoolName(aSelectionEvent.mReversed),
GetBoolName(aSelectionEvent.mExpandToClusterBoundary),
GetBoolName(aSelectionEvent.mUseNativeLineBreak),
mPendingEventsNeedingAck, GetBoolName(mWidgetHasComposition),
mPendingCompositionCount, mPendingCommitCount,
GetBoolName(mIsChildIgnoringCompositionEvents)));
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mDispatchedEventMessages.AppendElement(aSelectionEvent.mMessage);
#endif // MOZ_DIAGNOSTIC_ASSERT_ENABLED
mPendingEventsNeedingAck++;
}
void ContentCacheInParent::OnEventNeedingAckHandled(nsIWidget* aWidget,
EventMessage aMessage) {
// This is called when the child process receives WidgetCompositionEvent or
// WidgetSelectionEvent.
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p OnEventNeedingAckHandled(aWidget=0x%p, "
"aMessage=%s), mPendingEventsNeedingAck=%u, "
"mWidgetHasComposition=%s, mPendingCompositionCount=%" PRIu8 ", "
"mPendingCommitCount=%" PRIu8 ", mIsChildIgnoringCompositionEvents=%s",
this, aWidget, ToChar(aMessage), mPendingEventsNeedingAck,
GetBoolName(mWidgetHasComposition), mPendingCompositionCount,
mPendingCommitCount, GetBoolName(mIsChildIgnoringCompositionEvents)));
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mReceivedEventMessages.AppendElement(aMessage);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
bool isCommittedInChild =
// Commit requester in the remote process has committed the composition.
aMessage == eCompositionCommitRequestHandled ||
// The commit event has been handled normally in the remote process.
(!mIsChildIgnoringCompositionEvents &&
WidgetCompositionEvent::IsFollowedByCompositionEnd(aMessage));
if (isCommittedInChild) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
if (mPendingCompositionCount == 1) {
RemoveUnnecessaryEventMessageLog();
}
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
if (NS_WARN_IF(!mPendingCompositionCount)) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
nsPrintfCString info(
"\nThere is no pending composition but received %s "
"message from the remote child\n\n",
ToChar(aMessage));
AppendEventMessageLog(info);
CrashReporter::AppendAppNotesToCrashReport(info);
MOZ_DIAGNOSTIC_ASSERT(
false, "No pending composition but received unexpected commit event");
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
// Prevent odd behavior in release channel.
mPendingCompositionCount = 1;
}
mPendingCompositionCount--;
// Forget composition string only when the latest composition string is
// handled in the remote process because if there is 2 or more pending
// composition, this value shouldn't be referred.
if (!mPendingCompositionCount) {
mCompositionString.Truncate();
}
// Forget pending commit string length if it's handled in the remote
// process. Note that this doesn't care too old composition's commit
// string because in such case, we cannot return proper information
// to IME synchornously.
mPendingCommitLength = 0;
}
if (WidgetCompositionEvent::IsFollowedByCompositionEnd(aMessage)) {
// After the remote process receives eCompositionCommit(AsIs) event,
// it'll restart to handle composition events.
mIsChildIgnoringCompositionEvents = false;
if (NS_WARN_IF(!mPendingCommitCount)) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
nsPrintfCString info(
"\nThere is no pending comment events but received "
"%s message from the remote child\n\n",
ToChar(aMessage));
AppendEventMessageLog(info);
CrashReporter::AppendAppNotesToCrashReport(info);
MOZ_DIAGNOSTIC_ASSERT(
false,
"No pending commit events but received unexpected commit event");
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
// Prevent odd behavior in release channel.
mPendingCommitCount = 1;
}
mPendingCommitCount--;
} else if (aMessage == eCompositionCommitRequestHandled &&
mPendingCommitCount) {
// If the remote process commits composition synchronously after
// requesting commit composition and we've already sent commit composition,
// it starts to ignore following composition events until receiving
// eCompositionStart event.
mIsChildIgnoringCompositionEvents = true;
}
// If neither widget (i.e., IME) nor the remote process has composition,
// now, we can forget composition string informations.
if (!mWidgetHasComposition && !mPendingCompositionCount &&
!mPendingCommitCount) {
mCompositionStart.reset();
}
if (NS_WARN_IF(!mPendingEventsNeedingAck)) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
nsPrintfCString info(
"\nThere is no pending events but received %s "
"message from the remote child\n\n",
ToChar(aMessage));
AppendEventMessageLog(info);
CrashReporter::AppendAppNotesToCrashReport(info);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
MOZ_DIAGNOSTIC_ASSERT(
false, "No pending event message but received unexpected event");
mPendingEventsNeedingAck = 1;
}
if (--mPendingEventsNeedingAck) {
return;
}
FlushPendingNotifications(aWidget);
}
bool ContentCacheInParent::RequestIMEToCommitComposition(
nsIWidget* aWidget, bool aCancel, nsAString& aCommittedString) {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p RequestToCommitComposition(aWidget=%p, "
"aCancel=%s), mPendingCompositionCount=%" PRIu8 ", "
"mPendingCommitCount=%" PRIu8 ", mIsChildIgnoringCompositionEvents=%s, "
"IMEStateManager::DoesBrowserParentHaveIMEFocus(&mBrowserParent)=%s, "
"mWidgetHasComposition=%s, mCommitStringByRequest=%p",
this, aWidget, GetBoolName(aCancel), mPendingCompositionCount,
mPendingCommitCount, GetBoolName(mIsChildIgnoringCompositionEvents),
GetBoolName(
IMEStateManager::DoesBrowserParentHaveIMEFocus(&mBrowserParent)),
GetBoolName(mWidgetHasComposition), mCommitStringByRequest));
MOZ_ASSERT(!mCommitStringByRequest);
// If there are 2 or more pending compositions, we already sent
// eCompositionCommit(AsIs) to the remote process. So, this request is
// too late for IME. The remote process should wait following
// composition events for cleaning up TextComposition and handle the
// request as it's handled asynchronously.
if (mPendingCompositionCount > 1) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eToOldCompositionReceived);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
return false;
}
// If there is no pending composition, we may have already sent
// eCompositionCommit(AsIs) event for the active composition. If so, the
// remote process will receive composition events which causes cleaning up
// TextComposition. So, this shouldn't do nothing and TextComposition
// should handle the request as it's handled asynchronously.
// XXX Perhaps, this is wrong because TextComposition in child process
// may commit the composition with current composition string in the
// remote process. I.e., it may be different from actual commit string
// which user typed. So, perhaps, we should return true and the commit
// string.
if (mPendingCommitCount) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eToCommittedCompositionReceived);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
return false;
}
// If BrowserParent which has IME focus was already changed to different one,
// the request shouldn't be sent to IME because it's too late.
if (!IMEStateManager::DoesBrowserParentHaveIMEFocus(&mBrowserParent)) {
// Use the latest composition string which may not be handled in the
// remote process for avoiding data loss.
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eReceivedAfterBrowserParentBlur);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
aCommittedString = mCompositionString;
// After we return true from here, i.e., without actually requesting IME
// to commit composition, we will receive eCompositionCommitRequestHandled
// pseudo event message from the remote process. So, we need to increment
// mPendingEventsNeedingAck here.
mPendingEventsNeedingAck++;
return true;
}
RefPtr<TextComposition> composition =
IMEStateManager::GetTextCompositionFor(aWidget);
if (NS_WARN_IF(!composition)) {
MOZ_LOG(sContentCacheLog, LogLevel::Warning,
(" 0x%p RequestToCommitComposition(), "
"does nothing due to no composition",
this));
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eReceivedButNoTextComposition);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
return false;
}
mCommitStringByRequest = &aCommittedString;
// Request commit or cancel composition with TextComposition because we may
// have already requested to commit or cancel the composition or we may
// have already received eCompositionCommit(AsIs) event. Those status are
// managed by composition. So, if we don't request commit composition,
// we should do nothing with native IME here.
composition->RequestToCommit(aWidget, aCancel);
mCommitStringByRequest = nullptr;
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
(" 0x%p RequestToCommitComposition(), "
"mWidgetHasComposition=%s, the composition %s committed synchronously",
this, GetBoolName(mWidgetHasComposition),
composition->Destroyed() ? "WAS" : "has NOT been"));
if (!composition->Destroyed()) {
// When the composition isn't committed synchronously, the remote process's
// TextComposition instance will synthesize commit events and wait to
// receive delayed composition events. When TextComposition instances both
// in this process and the remote process will be destroyed when delayed
// composition events received. TextComposition instance in the parent
// process will dispatch following composition events and be destroyed
// normally. On the other hand, TextComposition instance in the remote
// process won't dispatch following composition events and will be
// destroyed by IMEStateManager::DispatchCompositionEvent().
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eHandledAsynchronously);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
return false;
}
// When the composition is committed synchronously, the commit string will be
// returned to the remote process. Then, PuppetWidget will dispatch
// eCompositionCommit event with the returned commit string (i.e., the value
// is aCommittedString of this method) and that causes destroying
// TextComposition instance in the remote process (Note that TextComposition
// instance in this process was already destroyed).
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eHandledSynchronously);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
return true;
}
void ContentCacheInParent::MaybeNotifyIME(
nsIWidget* aWidget, const IMENotification& aNotification) {
if (!mPendingEventsNeedingAck) {
IMEStateManager::NotifyIME(aNotification, aWidget, &mBrowserParent);
return;
}
switch (aNotification.mMessage) {
case NOTIFY_IME_OF_SELECTION_CHANGE:
mPendingSelectionChange.MergeWith(aNotification);
break;
case NOTIFY_IME_OF_TEXT_CHANGE:
mPendingTextChange.MergeWith(aNotification);
break;
case NOTIFY_IME_OF_POSITION_CHANGE:
mPendingLayoutChange.MergeWith(aNotification);
break;
case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED:
mPendingCompositionUpdate.MergeWith(aNotification);
break;
default:
MOZ_CRASH("Unsupported notification");
break;
}
}
void ContentCacheInParent::FlushPendingNotifications(nsIWidget* aWidget) {
MOZ_ASSERT(!mPendingEventsNeedingAck);
// If the BrowserParent's widget has already gone, this can do nothing since
// widget is necessary to notify IME of something.
if (!aWidget) {
return;
}
// New notifications which are notified during flushing pending notifications
// should be merged again.
mPendingEventsNeedingAck++;
nsCOMPtr<nsIWidget> widget = aWidget;
// First, text change notification should be sent because selection change
// notification notifies IME of current selection range in the latest content.
// So, IME may need the latest content before that.
if (mPendingTextChange.HasNotification()) {
IMENotification notification(mPendingTextChange);
if (!widget->Destroyed()) {
mPendingTextChange.Clear();
IMEStateManager::NotifyIME(notification, widget, &mBrowserParent);
}
}
if (mPendingSelectionChange.HasNotification()) {
IMENotification notification(mPendingSelectionChange);
if (!widget->Destroyed()) {
mPendingSelectionChange.Clear();
IMEStateManager::NotifyIME(notification, widget, &mBrowserParent);
}
}
// Layout change notification should be notified after selection change
// notification because IME may want to query position of new caret position.
if (mPendingLayoutChange.HasNotification()) {
IMENotification notification(mPendingLayoutChange);
if (!widget->Destroyed()) {
mPendingLayoutChange.Clear();
IMEStateManager::NotifyIME(notification, widget, &mBrowserParent);
}
}
// Finally, send composition update notification because it notifies IME of
// finishing handling whole sending events.
if (mPendingCompositionUpdate.HasNotification()) {
IMENotification notification(mPendingCompositionUpdate);
if (!widget->Destroyed()) {
mPendingCompositionUpdate.Clear();
IMEStateManager::NotifyIME(notification, widget, &mBrowserParent);
}
}
if (!--mPendingEventsNeedingAck && !widget->Destroyed() &&
(mPendingTextChange.HasNotification() ||
mPendingSelectionChange.HasNotification() ||
mPendingLayoutChange.HasNotification() ||
mPendingCompositionUpdate.HasNotification())) {
FlushPendingNotifications(widget);
}
}
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
void ContentCacheInParent::RemoveUnnecessaryEventMessageLog() {
bool foundLastCompositionStart = false;
for (size_t i = mDispatchedEventMessages.Length(); i > 1; i--) {
if (mDispatchedEventMessages[i - 1] != eCompositionStart) {
continue;
}
if (!foundLastCompositionStart) {
// Find previous eCompositionStart of the latest eCompositionStart.
foundLastCompositionStart = true;
continue;
}
// Remove the messages before the last 2 sets of composition events.
mDispatchedEventMessages.RemoveElementsAt(0, i - 1);
break;
}
uint32_t numberOfCompositionCommitRequestHandled = 0;
foundLastCompositionStart = false;
for (size_t i = mReceivedEventMessages.Length(); i > 1; i--) {
if (mReceivedEventMessages[i - 1] == eCompositionCommitRequestHandled) {
numberOfCompositionCommitRequestHandled++;
}
if (mReceivedEventMessages[i - 1] != eCompositionStart) {
continue;
}
if (!foundLastCompositionStart) {
// Find previous eCompositionStart of the latest eCompositionStart.
foundLastCompositionStart = true;
continue;
}
// Remove the messages before the last 2 sets of composition events.
mReceivedEventMessages.RemoveElementsAt(0, i - 1);
break;
}
if (!numberOfCompositionCommitRequestHandled) {
// If there is no eCompositionCommitRequestHandled in
// mReceivedEventMessages, we don't need to store log of
// RequestIMEToCommmitComposition().
mRequestIMEToCommitCompositionResults.Clear();
} else {
// We need to keep all reason of eCompositionCommitRequestHandled, which
// is sent when mRequestIMEToCommitComposition() returns true.
// So, we can discard older log than the first
// eCompositionCommitRequestHandled in mReceivedEventMessages.
for (size_t i = mRequestIMEToCommitCompositionResults.Length(); i > 1;
i--) {
if (mRequestIMEToCommitCompositionResults[i - 1] ==
RequestIMEToCommitCompositionResult::
eReceivedAfterBrowserParentBlur ||
mRequestIMEToCommitCompositionResults[i - 1] ==
RequestIMEToCommitCompositionResult::eHandledSynchronously) {
--numberOfCompositionCommitRequestHandled;
if (!numberOfCompositionCommitRequestHandled) {
mRequestIMEToCommitCompositionResults.RemoveElementsAt(0, i - 1);
break;
}
}
}
}
}
void ContentCacheInParent::AppendEventMessageLog(nsACString& aLog) const {
aLog.AppendLiteral("Dispatched Event Message Log:\n");
for (EventMessage message : mDispatchedEventMessages) {
aLog.AppendLiteral(" ");
aLog.Append(ToChar(message));
aLog.AppendLiteral("\n");
}
aLog.AppendLiteral("\nReceived Event Message Log:\n");
for (EventMessage message : mReceivedEventMessages) {
aLog.AppendLiteral(" ");
aLog.Append(ToChar(message));
aLog.AppendLiteral("\n");
}
aLog.AppendLiteral("\nResult of RequestIMEToCommitComposition():\n");
for (RequestIMEToCommitCompositionResult result :
mRequestIMEToCommitCompositionResults) {
aLog.AppendLiteral(" ");
aLog.Append(ToReadableText(result));
aLog.AppendLiteral("\n");
}
aLog.AppendLiteral("\n");
}
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
/*****************************************************************************
* mozilla::ContentCache::TextRectArray
*****************************************************************************/
LayoutDeviceIntRect ContentCache::TextRectArray::GetRect(
uint32_t aOffset) const {
LayoutDeviceIntRect rect;
if (IsOffsetInRange(aOffset)) {
rect = mRects[aOffset - mStart];
}
return rect;
}
LayoutDeviceIntRect ContentCache::TextRectArray::GetUnionRect(
uint32_t aOffset, uint32_t aLength) const {
LayoutDeviceIntRect rect;
if (!IsRangeCompletelyInRange(aOffset, aLength)) {
return rect;
}
for (uint32_t i = 0; i < aLength; i++) {
rect = rect.Union(mRects[aOffset - mStart + i]);
}
return rect;
}
LayoutDeviceIntRect ContentCache::TextRectArray::GetUnionRectAsFarAsPossible(
uint32_t aOffset, uint32_t aLength, bool aRoundToExistingOffset) const {
LayoutDeviceIntRect rect;
if (!HasRects() ||
(!aRoundToExistingOffset && !IsOverlappingWith(aOffset, aLength))) {
return rect;
}
uint32_t startOffset = std::max(aOffset, mStart);
if (aRoundToExistingOffset && startOffset >= EndOffset()) {
startOffset = EndOffset() - 1;
}
uint32_t endOffset = std::min(aOffset + aLength, EndOffset());
if (aRoundToExistingOffset && endOffset < mStart + 1) {
endOffset = mStart + 1;
}
if (NS_WARN_IF(endOffset < startOffset)) {
return rect;
}
for (uint32_t i = 0; i < endOffset - startOffset; i++) {
rect = rect.Union(mRects[startOffset - mStart + i]);
}
return rect;
}
} // namespace mozilla
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