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

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64 KiB
C++
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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 "mozilla/IMEStateManager.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Logging.h"
#include "mozilla/Move.h"
#include "mozilla/RefPtr.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEvents.h"
#include "mozilla/dom/TabParent.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);
}
class GetRectText : public nsAutoCString
{
public:
explicit GetRectText(const LayoutDeviceIntRect& aRect)
{
AssignLiteral("{ x=");
AppendInt(aRect.x);
AppendLiteral(", y=");
AppendInt(aRect.y);
AppendLiteral(", width=");
AppendInt(aRect.width);
AppendLiteral(", height=");
AppendInt(aRect.height);
AppendLiteral(" }");
}
virtual ~GetRectText() {}
};
class GetWritingModeName : public nsAutoCString
{
public:
explicit GetWritingModeName(const WritingMode& aWritingMode)
{
if (!aWritingMode.IsVertical()) {
AssignLiteral("Horizontal");
return;
}
if (aWritingMode.IsVerticalLR()) {
AssignLiteral("Vertical (LTR)");
return;
}
AssignLiteral("Vertical (RTL)");
}
virtual ~GetWritingModeName() {}
};
class GetEscapedUTF8String final : public NS_ConvertUTF16toUTF8
{
public:
explicit GetEscapedUTF8String(const nsAString& aString)
: NS_ConvertUTF16toUTF8(aString)
{
Escape();
}
explicit GetEscapedUTF8String(const char16ptr_t aString)
: NS_ConvertUTF16toUTF8(aString)
{
Escape();
}
GetEscapedUTF8String(const char16ptr_t aString, uint32_t aLength)
: NS_ConvertUTF16toUTF8(aString, aLength)
{
Escape();
}
private:
void Escape()
{
ReplaceSubstring("\r", "\\r");
ReplaceSubstring("\n", "\\n");
ReplaceSubstring("\t", "\\t");
}
};
/*****************************************************************************
* mozilla::ContentCache
*****************************************************************************/
LazyLogModule sContentCacheLog("ContentCacheWidgets");
ContentCache::ContentCache()
: mCompositionStart(UINT32_MAX)
{
}
/*****************************************************************************
* mozilla::ContentCacheInChild
*****************************************************************************/
ContentCacheInChild::ContentCacheInChild()
: ContentCache()
{
}
void
ContentCacheInChild::Clear()
{
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p Clear()", this));
mCompositionStart = UINT32_MAX;
mText.Truncate();
mSelection.Clear();
mFirstCharRect.SetEmpty();
mCaret.Clear();
mTextRectArray.Clear();
mEditorRect.SetEmpty();
}
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.Clear();
mSelection.Clear();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent selection(true, eQuerySelectedText, aWidget);
aWidget->DispatchEvent(&selection, status);
if (NS_WARN_IF(!selection.mSucceeded)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheSelection(), FAILED, "
"couldn't retrieve the selected text", this));
return false;
}
if (selection.mReply.mReversed) {
mSelection.mAnchor =
selection.mReply.mOffset + selection.mReply.mString.Length();
mSelection.mFocus = selection.mReply.mOffset;
} else {
mSelection.mAnchor = selection.mReply.mOffset;
mSelection.mFocus =
selection.mReply.mOffset + selection.mReply.mString.Length();
}
mSelection.mWritingMode = selection.GetWritingMode();
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.Clear();
if (NS_WARN_IF(!mSelection.IsValid())) {
return false;
}
// XXX Should be mSelection.mFocus?
mCaret.mOffset = mSelection.StartOffset();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent caretRect(true, eQueryCaretRect, aWidget);
caretRect.InitForQueryCaretRect(mCaret.mOffset);
aWidget->DispatchEvent(&caretRect, status);
if (NS_WARN_IF(!caretRect.mSucceeded)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheCaret(), FAILED, "
"couldn't retrieve the caret rect at offset=%u",
this, mCaret.mOffset));
mCaret.Clear();
return false;
}
mCaret.mRect = caretRect.mReply.mRect;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheCaret(), Succeeded, "
"mSelection={ mAnchor=%u, mFocus=%u, mWritingMode=%s }, "
"mCaret={ mOffset=%u, mRect=%s }",
this, mSelection.mAnchor, mSelection.mFocus,
GetWritingModeName(mSelection.mWritingMode).get(), mCaret.mOffset,
GetRectText(mCaret.mRect).get()));
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 editorRectEvent(true, eQueryEditorRect, aWidget);
aWidget->DispatchEvent(&editorRectEvent, status);
if (NS_WARN_IF(!editorRectEvent.mSucceeded)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheEditorRect(), FAILED, "
"couldn't retrieve the editor rect", this));
return false;
}
mEditorRect = editorRectEvent.mReply.mRect;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheEditorRect(), Succeeded, "
"mEditorRect=%s", this, GetRectText(mEditorRect).get()));
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 queryText(true, eQueryTextContent, aWidget);
queryText.InitForQueryTextContent(0, UINT32_MAX);
aWidget->DispatchEvent(&queryText, status);
if (NS_WARN_IF(!queryText.mSucceeded)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheText(), FAILED, couldn't retrieve whole text", this));
mText.Truncate();
return false;
}
mText = queryText.mReply.mString;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheText(), Succeeded, mText.Length()=%u", this, mText.Length()));
return CacheSelection(aWidget, aNotification);
}
bool
ContentCacheInChild::QueryCharRect(nsIWidget* aWidget,
uint32_t aOffset,
LayoutDeviceIntRect& aCharRect) const
{
aCharRect.SetEmpty();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent textRect(true, eQueryTextRect, aWidget);
textRect.InitForQueryTextRect(aOffset, 1);
aWidget->DispatchEvent(&textRect, status);
if (NS_WARN_IF(!textRect.mSucceeded)) {
return false;
}
aCharRect = textRect.mReply.mRect;
// Guarantee the rect is not empty.
if (NS_WARN_IF(!aCharRect.height)) {
aCharRect.height = 1;
}
if (NS_WARN_IF(!aCharRect.width)) {
aCharRect.width = 1;
}
return true;
}
bool
ContentCacheInChild::QueryCharRectArray(nsIWidget* aWidget,
uint32_t aOffset,
uint32_t aLength,
RectArray& aCharRectArray) const
{
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent textRects(true, eQueryTextRectArray, aWidget);
textRects.InitForQueryTextRectArray(aOffset, aLength);
aWidget->DispatchEvent(&textRects, status);
if (NS_WARN_IF(!textRects.mSucceeded)) {
aCharRectArray.Clear();
return false;
}
aCharRectArray = Move(textRects.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={ mOffset=%u, IsValid()=%s }",
this, aWidget, GetNotificationName(aNotification), mCaret.mOffset,
GetBoolName(mCaret.IsValid())));
mCompositionStart = UINT32_MAX;
mTextRectArray.Clear();
mSelection.ClearAnchorCharRects();
mSelection.ClearFocusCharRects();
mSelection.mRect.SetEmpty();
mFirstCharRect.SetEmpty();
if (NS_WARN_IF(!mSelection.IsValid())) {
return false;
}
// 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 = 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.mStart = mCompositionStart;
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));
}
}
if (mTextRectArray.InRange(mSelection.mAnchor) &&
(!mSelection.mAnchor || mTextRectArray.InRange(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.InRange(mSelection.mFocus) &&
(!mSelection.mFocus ||
mTextRectArray.InRange(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 textRect(true, eQueryTextRect, aWidget);
textRect.InitForQueryTextRect(mSelection.StartOffset(),
mSelection.Length());
aWidget->DispatchEvent(&textRect, status);
if (NS_WARN_IF(!textRect.mSucceeded)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve text rect of whole selected text", this));
} else {
mSelection.mRect = textRect.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.InRange(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;
}
}
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheTextRects(), Succeeded, "
"mText.Length()=%x, mTextRectArray={ mStart=%u, mRects.Length()=%zu"
" }, mSelection={ mAnchor=%u, mAnchorCharRects[eNextCharRect]=%s, "
"mAnchorCharRects[ePrevCharRect]=%s, mFocus=%u, "
"mFocusCharRects[eNextCharRect]=%s, mFocusCharRects[ePrevCharRect]=%s, "
"mRect=%s }, mFirstCharRect=%s",
this, mText.Length(), mTextRectArray.mStart,
mTextRectArray.mRects.Length(), mSelection.mAnchor,
GetRectText(mSelection.mAnchorCharRects[eNextCharRect]).get(),
GetRectText(mSelection.mAnchorCharRects[ePrevCharRect]).get(),
mSelection.mFocus,
GetRectText(mSelection.mFocusCharRects[eNextCharRect]).get(),
GetRectText(mSelection.mFocusCharRects[ePrevCharRect]).get(),
GetRectText(mSelection.mRect).get(), GetRectText(mFirstCharRect).get()));
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()=%u",
this, aStartOffset, aLength, GetBoolName(aReversed),
GetWritingModeName(aWritingMode).get(), mText.Length()));
if (!aReversed) {
mSelection.mAnchor = aStartOffset;
mSelection.mFocus = aStartOffset + aLength;
} else {
mSelection.mAnchor = aStartOffset + aLength;
mSelection.mFocus = aStartOffset;
}
mSelection.mWritingMode = aWritingMode;
if (NS_WARN_IF(!CacheCaret(aWidget))) {
return;
}
Unused << NS_WARN_IF(!CacheTextRects(aWidget));
}
/*****************************************************************************
* mozilla::ContentCacheInParent
*****************************************************************************/
ContentCacheInParent::ContentCacheInParent(TabParent& aTabParent)
: ContentCache()
, mTabParent(aTabParent)
, mCommitStringByRequest(nullptr)
, mPendingEventsNeedingAck(0)
, mCompositionStartInChild(UINT32_MAX)
, 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;
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) {
IMEStateManager::MaybeStartOffsetUpdatedInChild(aWidget, mCompositionStart);
}
// When the widget has composition, we should set mCompositionStart to
// *current* composition start offset. Note that, in strictly speaking,
// widget should not use WidgetQueryContentEvent if there are some pending
// compositions (i.e., when mPendingCompositionCount is 2 or more).
mCompositionStartInChild = aOther.mCompositionStart;
if (mWidgetHasComposition) {
if (aOther.mCompositionStart != UINT32_MAX) {
if (mCompositionStart != aOther.mCompositionStart) {
mCompositionStart = aOther.mCompositionStart;
mPendingCommitLength = 0;
}
} else if (mCompositionStart != mSelection.StartOffset()) {
mCompositionStart = mSelection.StartOffset();
mPendingCommitLength = 0;
NS_WARNING_ASSERTION(mCompositionStart != UINT32_MAX,
"mCompositionStart shouldn't be invalid offset when "
"the widget has composition");
}
} else if (mCompositionStart != UINT32_MAX) {
mCompositionStart = UINT32_MAX;
mPendingCommitLength = 0;
}
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p AssignContent(aNotification=%s), "
"Succeeded, mText.Length()=%u, mSelection={ mAnchor=%u, mFocus=%u, "
"mWritingMode=%s, mAnchorCharRects[eNextCharRect]=%s, "
"mAnchorCharRects[ePrevCharRect]=%s, mFocusCharRects[eNextCharRect]=%s, "
"mFocusCharRects[ePrevCharRect]=%s, mRect=%s }, "
"mFirstCharRect=%s, mCaret={ mOffset=%u, mRect=%s }, mTextRectArray={ "
"mStart=%u, mRects.Length()=%zu }, mWidgetHasComposition=%s, "
"mPendingCompositionCount=%u, mCompositionStart=%u, "
"mPendingCommitLength=%u, mEditorRect=%s",
this, GetNotificationName(aNotification),
mText.Length(), mSelection.mAnchor, mSelection.mFocus,
GetWritingModeName(mSelection.mWritingMode).get(),
GetRectText(mSelection.mAnchorCharRects[eNextCharRect]).get(),
GetRectText(mSelection.mAnchorCharRects[ePrevCharRect]).get(),
GetRectText(mSelection.mFocusCharRects[eNextCharRect]).get(),
GetRectText(mSelection.mFocusCharRects[ePrevCharRect]).get(),
GetRectText(mSelection.mRect).get(), GetRectText(mFirstCharRect).get(),
mCaret.mOffset, GetRectText(mCaret.mRect).get(), mTextRectArray.mStart,
mTextRectArray.mRects.Length(), GetBoolName(mWidgetHasComposition),
mPendingCompositionCount, mCompositionStart, mPendingCommitLength,
GetRectText(mEditorRect).get()));
}
bool
ContentCacheInParent::HandleQueryContentEvent(WidgetQueryContentEvent& aEvent,
nsIWidget* aWidget) const
{
MOZ_ASSERT(aWidget);
aEvent.mSucceeded = false;
aEvent.mReply.mFocusedWidget = 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) {
if (aWidget->PluginHasFocus()) {
if (NS_WARN_IF(!aEvent.mInput.MakeOffsetAbsolute(0))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to "
"aEvent.mInput.MakeOffsetAbsolute(0) failure, aEvent={ mMessage=%s, "
"mInput={ mOffset=%" PRId64 ", mLength=%" PRIu32 " } }",
this, ToChar(aEvent.mMessage), aEvent.mInput.mOffset,
aEvent.mInput.mLength));
return false;
}
} else if (mWidgetHasComposition) {
if (NS_WARN_IF(!aEvent.mInput.MakeOffsetAbsolute(
mCompositionStart +
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, mPendingCommitLength,
ToChar(aEvent.mMessage), aEvent.mInput.mOffset,
aEvent.mInput.mLength));
return false;
}
} else if (NS_WARN_IF(!mSelection.IsValid())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to mSelection is invalid",
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={ StartOffset()=%d, Length()=%d }, "
"mPendingCommitLength=%" PRIu32 ", aEvent={ mMessage=%s, "
"mInput={ mOffset=%" PRId64 ", mLength=%" PRIu32 " } }",
this, mSelection.StartOffset(), mSelection.Length(),
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 (aWidget->PluginHasFocus()) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), "
"return emtpy selection becasue plugin has focus",
this));
aEvent.mSucceeded = true;
aEvent.mReply.mOffset = 0;
aEvent.mReply.mReversed = false;
aEvent.mReply.mHasSelection = false;
return true;
}
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 true;
}
aEvent.mReply.mOffset = mSelection.StartOffset();
if (mSelection.Collapsed()) {
aEvent.mReply.mString.Truncate(0);
} else {
if (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()=%u",
this, mSelection.EndOffset(), mText.Length()));
return false;
}
aEvent.mReply.mString =
Substring(mText, aEvent.mReply.mOffset, mSelection.Length());
}
aEvent.mReply.mReversed = mSelection.Reversed();
aEvent.mReply.mHasSelection = true;
aEvent.mReply.mWritingMode = mSelection.mWritingMode;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), "
"Succeeded, aEvent={ mReply={ mOffset=%u, mString=\"%s\", "
"mReversed=%s, mHasSelection=%s, mWritingMode=%s } }",
this, aEvent.mReply.mOffset,
GetEscapedUTF8String(aEvent.mReply.mString).get(),
GetBoolName(aEvent.mReply.mReversed),
GetBoolName(aEvent.mReply.mHasSelection),
GetWritingModeName(aEvent.mReply.mWritingMode).get()));
break;
case eQueryTextContent: {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent("
"aEvent={ mMessage=eQueryTextContent, mInput={ mOffset=%" PRId64
", mLength=%u } }, aWidget=0x%p), mText.Length()=%u",
this, aEvent.mInput.mOffset,
aEvent.mInput.mLength, aWidget, mText.Length()));
uint32_t inputOffset = aEvent.mInput.mOffset;
uint32_t inputEndOffset =
std::min(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.mReply.mOffset = inputOffset;
aEvent.mReply.mString =
Substring(mText, inputOffset, inputEndOffset - inputOffset);
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), "
"Succeeded, aEvent={ mReply={ mOffset=%u, mString.Length()=%u } }",
this, aEvent.mReply.mOffset, aEvent.mReply.mString.Length()));
break;
}
case eQueryTextRect:
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent("
"aEvent={ mMessage=eQueryTextRect, mInput={ mOffset=%" PRId64
", mLength=%u } }, aWidget=0x%p), mText.Length()=%u",
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 true;
}
// 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.
if (aEvent.mInput.mLength) {
if (NS_WARN_IF(!GetUnionTextRects(aEvent.mInput.mOffset,
aEvent.mInput.mLength,
isRelativeToInsertionPoint,
aEvent.mReply.mRect))) {
// 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,
aEvent.mReply.mRect))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), "
"FAILED to get caret rect", this));
return false;
}
}
if (aEvent.mInput.mOffset < mText.Length()) {
aEvent.mReply.mString =
Substring(mText, aEvent.mInput.mOffset,
mText.Length() >= aEvent.mInput.EndOffset() ?
aEvent.mInput.mLength : UINT32_MAX);
} else {
aEvent.mReply.mString.Truncate(0);
}
aEvent.mReply.mOffset = aEvent.mInput.mOffset;
// 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={ mReply={ mOffset=%u, mString=\"%s\", "
"mWritingMode=%s, mRect=%s } }",
this, aEvent.mReply.mOffset,
GetEscapedUTF8String(aEvent.mReply.mString).get(),
GetWritingModeName(aEvent.mReply.mWritingMode).get(),
GetRectText(aEvent.mReply.mRect).get()));
break;
case eQueryCaretRect:
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent("
"aEvent={ mMessage=eQueryCaretRect, mInput={ mOffset=%" PRId64 " } }, "
"aWidget=0x%p), mText.Length()=%u",
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 true;
}
// 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.
if (NS_WARN_IF(!GetCaretRect(aEvent.mInput.mOffset,
isRelativeToInsertionPoint,
aEvent.mReply.mRect))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), "
"FAILED to get caret rect", this));
return false;
}
aEvent.mReply.mOffset = aEvent.mInput.mOffset;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), "
"Succeeded, aEvent={ mReply={ mOffset=%u, mRect=%s } }",
this, aEvent.mReply.mOffset, GetRectText(aEvent.mReply.mRect).get()));
break;
case eQueryEditorRect:
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent("
"aEvent={ mMessage=eQueryEditorRect }, aWidget=0x%p)",
this, aWidget));
aEvent.mReply.mRect = mEditorRect;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p HandleQueryContentEvent(), "
"Succeeded, aEvent={ mReply={ mRect=%s } }",
this, GetRectText(aEvent.mReply.mRect).get()));
break;
default:
break;
}
aEvent.mSucceeded = true;
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={ mStart=%u, mRects.Length()=%zu }, "
"mSelection={ mAnchor=%u, mFocus=%u }",
this, aOffset, GetBoolName(aRoundToExistingOffset),
mTextRectArray.mStart, mTextRectArray.mRects.Length(),
mSelection.mAnchor, mSelection.mFocus));
if (!aOffset) {
NS_WARNING_ASSERTION(!mFirstCharRect.IsEmpty(), "empty rect");
aTextRect = mFirstCharRect;
return !aTextRect.IsEmpty();
}
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();
}
uint32_t offset = aOffset;
if (!mTextRectArray.InRange(aOffset)) {
if (!aRoundToExistingOffset) {
aTextRect.SetEmpty();
return false;
}
if (!mTextRectArray.IsValid()) {
// 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();
}
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={ "
"mStart=%u, mRects.Length()=%zu }, "
"mSelection={ mAnchor=%u, mFocus=%u }",
this, aOffset, aLength, GetBoolName(aRoundToExistingOffset),
mTextRectArray.mStart, mTextRectArray.mRects.Length(),
mSelection.mAnchor, mSelection.mFocus));
CheckedInt<uint32_t> endOffset =
CheckedInt<uint32_t>(aOffset) + aLength;
if (!endOffset.isValid()) {
return false;
}
if (!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 (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 && aOffset != mSelection.mAnchor &&
aOffset != mSelection.mFocus && !mTextRectArray.InRange(aOffset)) {
// The first character rect isn't cached.
return false;
}
if ((aRoundToExistingOffset && mTextRectArray.HasRects()) ||
mTextRectArray.IsOverlappingWith(aOffset, aLength)) {
aUnionTextRect =
mTextRectArray.GetUnionRectAsFarAsPossible(aOffset, aLength,
aRoundToExistingOffset);
} else {
aUnionTextRect.SetEmpty();
}
if (!aOffset) {
aUnionTextRect = aUnionTextRect.Union(mFirstCharRect);
}
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={ mOffset=%u, mRect=%s, IsValid()=%s }, mTextRectArray={ "
"mStart=%u, mRects.Length()=%zu }, mSelection={ mAnchor=%u, mFocus=%u, "
"mWritingMode=%s, mAnchorCharRects[eNextCharRect]=%s, "
"mAnchorCharRects[ePrevCharRect]=%s, mFocusCharRects[eNextCharRect]=%s, "
"mFocusCharRects[ePrevCharRect]=%s }, mFirstCharRect=%s",
this, aOffset, GetBoolName(aRoundToExistingOffset),
mCaret.mOffset, GetRectText(mCaret.mRect).get(),
GetBoolName(mCaret.IsValid()), mTextRectArray.mStart,
mTextRectArray.mRects.Length(), mSelection.mAnchor, mSelection.mFocus,
GetWritingModeName(mSelection.mWritingMode).get(),
GetRectText(mSelection.mAnchorCharRects[eNextCharRect]).get(),
GetRectText(mSelection.mAnchorCharRects[ePrevCharRect]).get(),
GetRectText(mSelection.mFocusCharRects[eNextCharRect]).get(),
GetRectText(mSelection.mFocusCharRects[ePrevCharRect]).get(),
GetRectText(mFirstCharRect).get()));
if (mCaret.IsValid() && 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.mWritingMode.IsVertical()) {
aCaretRect.y = aCaretRect.YMost();
} else {
// XXX bidi-unaware.
aCaretRect.x = 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.mWritingMode.IsVertical()) {
aCaretRect.height = mCaret.IsValid() ? mCaret.mRect.height : 1;
} else {
aCaretRect.width = mCaret.IsValid() ? 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()=%u), mRanges->Length()=%zu }), "
"mPendingEventsNeedingAck=%u, mWidgetHasComposition=%s, "
"mPendingCompositionCount=%" PRIu8 ", mPendingCommitCount=%" PRIu8 ", "
"mIsChildIgnoringCompositionEvents=%s, mCommitStringByRequest=0x%p",
this, ToChar(aEvent.mMessage),
GetEscapedUTF8String(aEvent.mData).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 (aEvent.mWidget && aEvent.mWidget->PluginHasFocus()) {
// If focus is on plugin, we cannot get selection range
mCompositionStart = 0;
} else if (mCompositionStartInChild != UINT32_MAX) {
// 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 = mSelection.StartOffset();
}
MOZ_ASSERT(aEvent.mMessage == eCompositionStart);
MOZ_RELEASE_ASSERT(mPendingCompositionCount < UINT8_MAX);
mPendingCompositionCount++;
}
mWidgetHasComposition = !aEvent.CausesDOMCompositionEndEvent();
if (!mWidgetHasComposition) {
mCompositionStart = UINT32_MAX;
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) {
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, "
"mPendingCompositionCount=%" PRIu8 ", mPendingCommitCount=%" PRIu8 ", "
"mIsChildIgnoringCompositionEvents=%s",
this, aWidget, ToChar(aMessage), mPendingEventsNeedingAck,
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 (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::DoesTabParentHaveIMEFocus(&mTabParent)=%s, "
"mWidgetHasComposition=%s, mCommitStringByRequest=%p",
this, aWidget, GetBoolName(aCancel), mPendingCompositionCount,
mPendingCommitCount, GetBoolName(mIsChildIgnoringCompositionEvents),
GetBoolName(IMEStateManager::DoesTabParentHaveIMEFocus(&mTabParent)),
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 TabParent 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::DoesTabParentHaveIMEFocus(&mTabParent)) {
// 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::
eReceivedAfterTabParentBlur);
#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, &mTabParent);
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 TabParent'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, &mTabParent);
}
}
if (mPendingSelectionChange.HasNotification()) {
IMENotification notification(mPendingSelectionChange);
if (!widget->Destroyed()) {
mPendingSelectionChange.Clear();
IMEStateManager::NotifyIME(notification, widget, &mTabParent);
}
}
// 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, &mTabParent);
}
}
// 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, &mTabParent);
}
}
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::eReceivedAfterTabParentBlur ||
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 (InRange(aOffset)) {
rect = mRects[aOffset - mStart];
}
return rect;
}
LayoutDeviceIntRect
ContentCache::TextRectArray::GetUnionRect(uint32_t aOffset,
uint32_t aLength) const
{
LayoutDeviceIntRect rect;
if (!InRange(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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