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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 "ContentCache.h"
#include <utility>
#include "IMEData.h"
#include "TextEvents.h"
#include "mozilla/Assertions.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Logging.h"
#include "mozilla/RefPtr.h"
#include "mozilla/TextComposition.h"
#include "mozilla/dom/BrowserParent.h"
#include "nsExceptionHandler.h"
#include "nsIWidget.h"
#include "nsPrintfCString.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");
bool ContentCache::IsValid() const {
if (mText.isNothing()) {
// mSelection and mCaret depend on mText.
if (NS_WARN_IF(mSelection.isSome()) || NS_WARN_IF(mCaret.isSome())) {
return false;
}
} else {
// mSelection depends on mText.
if (mSelection.isSome() && NS_WARN_IF(!mSelection->IsValidIn(*mText))) {
return false;
}
// mCaret depends on mSelection.
if (mCaret.isSome() &&
(NS_WARN_IF(mSelection.isNothing()) ||
NS_WARN_IF(!mSelection->mHasRange) ||
NS_WARN_IF(mSelection->StartOffset() != mCaret->Offset()))) {
return false;
}
}
// mTextRectArray stores character rects around composition string.
// Note that even if we fail to collect the rects, we may keep storing
// mCompositionStart.
if (mTextRectArray.isSome()) {
if (NS_WARN_IF(mCompositionStart.isNothing())) {
return false;
}
}
return true;
}
void ContentCache::AssertIfInvalid() const {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
if (IsValid()) {
return;
}
// This text will appear in the crash reports without any permissions.
// Do not use `ToString` here to avoid to expose unexpected data with
// changing the type or `operator<<()`.
nsPrintfCString info(
"ContentCache={ mText=%s, mSelection=%s, mCaret=%s, mTextRectArray=%s, "
"mCompositionStart=%s }\n",
// Don't expose mText.ref() value for protecting the user's privacy.
mText.isNothing()
? "Nothing"
: nsPrintfCString("{ Length()=%zu }", mText->Length()).get(),
mSelection.isNothing()
? "Nothing"
: nsPrintfCString("{ mAnchor=%u, mFocus=%u }", mSelection->mAnchor,
mSelection->mFocus)
.get(),
mCaret.isNothing()
? "Nothing"
: nsPrintfCString("{ mOffset=%u }", mCaret->mOffset).get(),
mTextRectArray.isNothing()
? "Nothing"
: nsPrintfCString("{ Length()=%u }", mTextRectArray->Length()).get(),
mCompositionStart.isNothing()
? "Nothing"
: nsPrintfCString("%u", mCompositionStart.value()).get());
CrashReporter::AppendAppNotesToCrashReport(info);
MOZ_DIAGNOSTIC_ASSERT(false, "Invalid ContentCache data");
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
}
/*****************************************************************************
* mozilla::ContentCacheInChild
*****************************************************************************/
void ContentCacheInChild::Clear() {
MOZ_LOG(sContentCacheLog, LogLevel::Info, ("0x%p Clear()", this));
mCompositionStart.reset();
mLastCommit.reset();
mText.reset();
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)));
const bool textCached = CacheText(aWidget, aNotification);
const bool editorRectCached = CacheEditorRect(aWidget, aNotification);
AssertIfInvalid();
return (textCached || editorRectCached) && IsValid();
}
bool ContentCacheInChild::CacheSelection(nsIWidget* aWidget,
const IMENotification* aNotification) {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p CacheSelection(aWidget=0x%p, aNotification=%s), mText=%s", this,
aWidget, GetNotificationName(aNotification),
PrintStringDetail(mText, PrintStringDetail::kMaxLengthForEditor).get()));
mSelection.reset();
mCaret.reset();
if (mText.isNothing()) {
return false;
}
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
aWidget);
aWidget->DispatchEvent(&querySelectedTextEvent, status);
if (NS_WARN_IF(querySelectedTextEvent.Failed())) {
MOZ_LOG(
sContentCacheLog, LogLevel::Error,
("0x%p CacheSelection(), FAILED, couldn't retrieve the selected text",
this));
// XXX Allowing selection-independent character rects makes things
// complicated in the parent...
}
// ContentCache should store only editable content. Therefore, if current
// selection root is not editable, we don't need to store the selection, i.e.,
// let's treat it as there is no selection. However, if we already have
// previously editable text, let's store the selection even if it becomes
// uneditable because not doing so would create odd situation. E.g., IME may
// fail only querying selection after succeeded querying text.
else if (NS_WARN_IF(!querySelectedTextEvent.mReply->mIsEditableContent)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheSelection(), FAILED, editable content had already been "
"blurred",
this));
AssertIfInvalid();
return false;
} else {
mSelection.emplace(querySelectedTextEvent);
}
return (CacheCaretAndTextRects(aWidget, aNotification) ||
querySelectedTextEvent.Succeeded()) &&
IsValid();
}
bool ContentCacheInChild::CacheCaret(nsIWidget* aWidget,
const IMENotification* aNotification) {
mCaret.reset();
if (mSelection.isNothing()) {
return false;
}
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheCaret(aWidget=0x%p, aNotification=%s)", this, aWidget,
GetNotificationName(aNotification)));
if (mSelection->mHasRange) {
// XXX Should be mSelection.mFocus?
const uint32_t offset = mSelection->StartOffset();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent queryCaretRectEvent(true, eQueryCaretRect, aWidget);
queryCaretRectEvent.InitForQueryCaretRect(offset);
aWidget->DispatchEvent(&queryCaretRectEvent, status);
if (NS_WARN_IF(queryCaretRectEvent.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, queryCaretRectEvent.mReply->mRect);
}
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheCaret(), Succeeded, mSelection=%s, mCaret=%s", this,
ToString(mSelection).c_str(), ToString(mCaret).c_str()));
AssertIfInvalid();
return IsValid();
}
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;
}
// ContentCache should store only editable content. Therefore, if current
// selection root is not editable, we don't need to store the editor rect,
// i.e., let's treat it as there is no focused editor.
if (NS_WARN_IF(!queryEditorRectEvent.mReply->mIsEditableContent)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheText(), FAILED, editable content had already been "
"blurred",
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::CacheCaretAndTextRects(
nsIWidget* aWidget, const IMENotification* aNotification) {
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheCaretAndTextRects(aWidget=0x%p, aNotification=%s)", this,
aWidget, GetNotificationName(aNotification)));
const bool caretCached = CacheCaret(aWidget, aNotification);
const bool textRectsCached = CacheTextRects(aWidget, aNotification);
AssertIfInvalid();
return (caretCached || textRectsCached) && IsValid();
}
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.reset();
}
// ContentCache should store only editable content. Therefore, if current
// selection root is not editable, we don't need to store the text, i.e.,
// let's treat it as there is no editable text.
else if (NS_WARN_IF(!queryTextContentEvent.mReply->mIsEditableContent)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheText(), FAILED, editable content had already been "
"blurred",
this));
mText.reset();
} else {
mText = Some(nsString(queryTextContentEvent.mReply->DataRef()));
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p CacheText(), Succeeded, mText=%s", this,
PrintStringDetail(mText, PrintStringDetail::kMaxLengthForEditor)
.get()));
}
// Forget last commit range if string in the range is different from the
// last commit string.
if (mLastCommit.isSome() &&
(mText.isNothing() ||
nsDependentSubstring(mText.ref(), 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.ref(), mLastCommit->StartOffset(),
mLastCommit->Length()),
PrintStringDetail::kMaxLengthForCompositionString)
.get()));
mLastCommit.reset();
}
// If we fail to get editable text content, it must mean that there is no
// focused element anymore or focused element is not editable. In this case,
// we should not get selection of non-editable content
if (MOZ_UNLIKELY(mText.isNothing())) {
mSelection.reset();
mCaret.reset();
mTextRectArray.reset();
AssertIfInvalid();
return false;
}
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()));
if (mSelection.isSome()) {
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 = Some(TextRectArray(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();
}
} else {
mCompositionStart.reset();
mTextRectArray.reset();
}
if (mSelection.isSome()) {
// Set mSelection->mAnchorCharRects
// If we've already have the rect in mTextRectArray, save the query cost.
if (mSelection->mHasRange && 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);
}
}
// Otherwise, get it from content even if there is no selection ranges.
else {
RectArray rects;
const uint32_t startOffset = mSelection->mHasRange && mSelection->mAnchor
? mSelection->mAnchor - 1u
: 0u;
const uint32_t length =
mSelection->mHasRange && mSelection->mAnchor ? 2u : 1u;
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 (%s)",
this,
mSelection ? ToString(mSelection->mAnchor).c_str() : "Nothing"));
MOZ_ASSERT_IF(mSelection.isSome(),
mSelection->mAnchorCharRects[ePrevCharRect].IsEmpty());
MOZ_ASSERT_IF(mSelection.isSome(),
mSelection->mAnchorCharRects[eNextCharRect].IsEmpty());
} else if (rects.Length()) {
if (rects.Length() > 1) {
mSelection->mAnchorCharRects[ePrevCharRect] = rects[0];
mSelection->mAnchorCharRects[eNextCharRect] = rects[1];
} else {
mSelection->mAnchorCharRects[eNextCharRect] = rects[0];
MOZ_ASSERT(mSelection->mAnchorCharRects[ePrevCharRect].IsEmpty());
}
}
}
// Set mSelection->mFocusCharRects
// If selection is collapsed (including no selection case), the focus char
// rects are same as the anchor char rects so that we can just copy them.
if (mSelection->IsCollapsed()) {
mSelection->mFocusCharRects[0] = mSelection->mAnchorCharRects[0];
mSelection->mFocusCharRects[1] = mSelection->mAnchorCharRects[1];
}
// If the selection range is in mTextRectArray, save the query cost.
else if (mTextRectArray.isSome() &&
mTextRectArray->IsOffsetInRange(mSelection->mFocus) &&
(!mSelection->mFocus ||
mTextRectArray->IsOffsetInRange(mSelection->mFocus - 1))) {
MOZ_ASSERT(mSelection->mHasRange);
mSelection->mFocusCharRects[eNextCharRect] =
mTextRectArray->GetRect(mSelection->mFocus);
if (mSelection->mFocus) {
mSelection->mFocusCharRects[ePrevCharRect] =
mTextRectArray->GetRect(mSelection->mFocus - 1);
}
}
// Otherwise, including no selection range cases, need to query the rects.
else {
MOZ_ASSERT(mSelection->mHasRange);
RectArray rects;
const uint32_t startOffset =
mSelection->mFocus ? mSelection->mFocus - 1u : 0u;
const uint32_t length = mSelection->mFocus ? 2u : 1u;
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 (%s)",
this,
mSelection ? ToString(mSelection->mFocus).c_str() : "Nothing"));
MOZ_ASSERT_IF(mSelection.isSome(),
mSelection->mFocusCharRects[ePrevCharRect].IsEmpty());
MOZ_ASSERT_IF(mSelection.isSome(),
mSelection->mFocusCharRects[eNextCharRect].IsEmpty());
} else if (NS_WARN_IF(mSelection.isNothing())) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, mSelection was reset during "
"the call of QueryCharRectArray",
this));
} 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 there is a non-collapsed selection range, let's query the whole selected
// text rect. Note that the result cannot be computed from first character
// rect and last character rect of the selection because they both may be in
// middle of different line.
if (mSelection.isSome() && mSelection->mHasRange &&
!mSelection->IsCollapsed()) {
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;
}
}
// Even if there is no selection range, we should have the first character
// rect for the last resort of suggesting position of IME UI.
if (mSelection.isSome() && mSelection->mHasRange && !mSelection->mFocus) {
mFirstCharRect = mSelection->mFocusCharRects[eNextCharRect];
} else if (mSelection.isSome() && mSelection->mHasRange &&
mSelection->mFocus == 1) {
mFirstCharRect = mSelection->mFocusCharRects[ePrevCharRect];
} else if (mSelection.isSome() && mSelection->mHasRange &&
!mSelection->mAnchor) {
mFirstCharRect = mSelection->mAnchorCharRects[eNextCharRect];
} else if (mSelection.isSome() && mSelection->mHasRange &&
mSelection->mAnchor == 1) {
mFirstCharRect = mSelection->mFocusCharRects[ePrevCharRect];
} else if (mTextRectArray.isSome() && mTextRectArray->IsOffsetInRange(0u)) {
mFirstCharRect = mTextRectArray->GetRect(0u);
} else {
LayoutDeviceIntRect charRect;
if (MOZ_UNLIKELY(NS_WARN_IF(!QueryCharRect(aWidget, 0, charRect)))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p CacheTextRects(), FAILED, "
"couldn't retrieve first char rect",
this));
mFirstCharRect.SetEmpty();
} else {
mFirstCharRect = charRect;
}
}
// Finally, let's cache the last commit string's character rects until
// selection change or something other editing because user may reconvert
// or undo the last commit. Then, IME requires the character rects for
// positioning their UI.
if (mLastCommit.isSome()) {
mLastCommitStringTextRectArray =
Some(TextRectArray(mLastCommit->StartOffset()));
if (mLastCommit->Length() == 1 && mSelection.isSome() &&
mSelection->mHasRange &&
mSelection->mAnchor - 1 == mLastCommit->StartOffset() &&
!mSelection->mAnchorCharRects[ePrevCharRect].IsEmpty()) {
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));
} else {
mLastCommitStringTextRectArray.reset();
}
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p CacheTextRects(), Succeeded, "
"mText=%s, mTextRectArray=%s, mSelection=%s, "
"mFirstCharRect=%s, mLastCommitStringTextRectArray=%s",
this,
PrintStringDetail(mText, PrintStringDetail::kMaxLengthForEditor).get(),
ToString(mTextRectArray).c_str(), ToString(mSelection).c_str(),
ToString(mFirstCharRect).c_str(),
ToString(mLastCommitStringTextRectArray).c_str()));
AssertIfInvalid();
return IsValid();
}
bool ContentCacheInChild::SetSelection(
nsIWidget* aWidget,
const IMENotification::SelectionChangeDataBase& aSelectionChangeData) {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p SetSelection(aSelectionChangeData=%s), mText=%s", this,
ToString(aSelectionChangeData).c_str(),
PrintStringDetail(mText, PrintStringDetail::kMaxLengthForEditor).get()));
if (MOZ_UNLIKELY(mText.isNothing())) {
return false;
}
mSelection = Some(Selection(aSelectionChangeData));
if (mLastCommit.isSome()) {
// Forget last commit string range if selection is not collapsed
// at end of the last commit string.
if (!mSelection->mHasRange || !mSelection->IsCollapsed() ||
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();
}
}
CacheCaret(aWidget);
CacheTextRects(aWidget);
return mSelection.isSome() && IsValid();
}
/*****************************************************************************
* mozilla::ContentCacheInParent
*****************************************************************************/
ContentCacheInParent::ContentCacheInParent(BrowserParent& aBrowserParent)
: mBrowserParent(aBrowserParent),
mCommitStringByRequest(nullptr),
mPendingCommitLength(0),
mIsChildIgnoringCompositionEvents(false) {}
void ContentCacheInParent::AssignContent(const ContentCache& aOther,
nsIWidget* aWidget,
const IMENotification* aNotification) {
MOZ_DIAGNOSTIC_ASSERT(aOther.IsValid());
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 (WidgetHasComposition() && mHandlingCompositions.Length() == 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 (WidgetHasComposition() || HasPendingCommit()) {
if (mCompositionStartInChild.isSome()) {
if (mCompositionStart.valueOr(UINT32_MAX) !=
mCompositionStartInChild.value()) {
mCompositionStart = mCompositionStartInChild;
mPendingCommitLength = 0;
}
} else if (mCompositionStart.isSome() && mSelection.isSome() &&
mSelection->mHasRange &&
mCompositionStart.value() != mSelection->StartOffset()) {
mCompositionStart = Some(mSelection->StartOffset());
mPendingCommitLength = 0;
}
}
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p AssignContent(aNotification=%s), "
"Succeeded, mText=%s, mSelection=%s, mFirstCharRect=%s, "
"mCaret=%s, mTextRectArray=%s, WidgetHasComposition()=%s, "
"mHandlingCompositions.Length()=%zu, mCompositionStart=%s, "
"mPendingCommitLength=%u, mEditorRect=%s, "
"mLastCommitStringTextRectArray=%s",
this, GetNotificationName(aNotification),
PrintStringDetail(mText, PrintStringDetail::kMaxLengthForEditor).get(),
ToString(mSelection).c_str(), ToString(mFirstCharRect).c_str(),
ToString(mCaret).c_str(), ToString(mTextRectArray).c_str(),
GetBoolName(WidgetHasComposition()), mHandlingCompositions.Length(),
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 " } }, "
"WidgetHasComposition()=%s, HasPendingCommit()=%s, "
"mCompositionStart=%" PRIu32 ", "
"mPendingCommitLength=%" PRIu32 ", mSelection=%s",
this, ToChar(aEvent.mMessage), aEvent.mInput.mOffset,
aEvent.mInput.mLength, GetBoolName(WidgetHasComposition()),
GetBoolName(HasPendingCommit()), mCompositionStart.valueOr(UINT32_MAX),
mPendingCommitLength, ToString(mSelection).c_str()));
if (WidgetHasComposition() || HasPendingCommit()) {
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 "
"Nothing",
this));
return false;
} else if (NS_WARN_IF(mSelection->mHasRange)) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED due to there is no "
"selection range, but the query requested with relative offset "
"from selection",
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 (MOZ_UNLIKELY(NS_WARN_IF(mSelection.isNothing()))) {
// If content cache hasn't been initialized properly, make the query
// failed.
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED because mSelection "
"is Nothing",
this));
return false;
}
MOZ_DIAGNOSTIC_ASSERT(mText.isSome());
MOZ_DIAGNOSTIC_ASSERT(mSelection->IsValidIn(*mText));
aEvent.EmplaceReply();
aEvent.mReply->mFocusedWidget = aWidget;
if (mSelection->mHasRange) {
if (MOZ_LIKELY(mText.isSome())) {
aEvent.mReply->mOffsetAndData.emplace(
mSelection->StartOffset(),
Substring(mText.ref(), mSelection->StartOffset(),
mSelection->Length()),
OffsetAndDataFor::SelectedString);
} else {
// TODO: Investigate this case. I find this during
// test_mousecapture.xhtml on Linux.
aEvent.mReply->mOffsetAndData.emplace(
0u, EmptyString(), OffsetAndDataFor::SelectedString);
}
}
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.isSome() ? mText->Length() : 0u));
if (MOZ_UNLIKELY(NS_WARN_IF(mText.isNothing()))) {
MOZ_LOG(sContentCacheLog, LogLevel::Error,
("0x%p HandleQueryContentEvent(), FAILED because "
"there is no text data",
this));
return false;
}
const uint32_t inputOffset = aEvent.mInput.mOffset;
const uint32_t inputEndOffset = std::min<uint32_t>(
aEvent.mInput.EndOffset(), mText.isSome() ? mText->Length() : 0u);
if (MOZ_UNLIKELY(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;
const nsAString& textInQueriedRange =
inputEndOffset > inputOffset
? static_cast<const nsAString&>(Substring(
mText.ref(), inputOffset, inputEndOffset - inputOffset))
: static_cast<const nsAString&>(EmptyString());
aEvent.mReply->mOffsetAndData.emplace(inputOffset, textInQueriedRange,
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.isSome() ? mText->Length() : 0u));
// 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 (MOZ_UNLIKELY(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;
const nsAString& textInQueriedRange =
mText.isSome() && aEvent.mInput.mOffset <
static_cast<int64_t>(
mText.isSome() ? mText->Length() : 0u)
? static_cast<const nsAString&>(
Substring(mText.ref(), aEvent.mInput.mOffset,
mText->Length() >= aEvent.mInput.EndOffset()
? aEvent.mInput.mLength
: UINT32_MAX))
: static_cast<const nsAString&>(EmptyString());
aEvent.mReply->mOffsetAndData.emplace(aEvent.mInput.mOffset,
textInQueriedRange,
OffsetAndDataFor::EditorString);
// XXX This may be wrong if storing range isn't in the selection range.
aEvent.mReply->mWritingMode =
mSelection.isSome() ? mSelection->mWritingMode : WritingMode();
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.isSome() ? mText->Length() : 0u));
// 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));
// XXX This query should fail if no editable elmenet has focus. Or,
// perhaps, should return rect of the window instead.
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() && mSelection->mHasRange) {
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 if there is because IME must query a char rect around it if
// there is no composition.
if (mSelection.isNothing()) {
// Unfortunately, there is no data about text rect...
aTextRect.SetEmpty();
return false;
}
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->IsCollapsed() &&
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() && mSelection->mHasRange) {
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() && mSelection->mHasRange &&
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() && mSelection->mHasRange) {
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& aCompositionEvent) {
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p OnCompositionEvent(aCompositionEvent={ "
"mMessage=%s, mData=\"%s\", mRanges->Length()=%zu }), "
"PendingEventsNeedingAck()=%u, WidgetHasComposition()=%s, "
"mHandlingCompositions.Length()=%zu, HasPendingCommit()=%s, "
"mIsChildIgnoringCompositionEvents=%s, mCommitStringByRequest=0x%p",
this, ToChar(aCompositionEvent.mMessage),
PrintStringDetail(aCompositionEvent.mData,
PrintStringDetail::kMaxLengthForCompositionString)
.get(),
aCompositionEvent.mRanges ? aCompositionEvent.mRanges->Length() : 0,
PendingEventsNeedingAck(), GetBoolName(WidgetHasComposition()),
mHandlingCompositions.Length(), GetBoolName(HasPendingCommit()),
GetBoolName(mIsChildIgnoringCompositionEvents), mCommitStringByRequest));
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mDispatchedEventMessages.AppendElement(aCompositionEvent.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 (!WidgetHasComposition()) {
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->mHasRange
? mSelection->StartOffset()
: 0u);
}
MOZ_ASSERT(aCompositionEvent.mMessage == eCompositionStart);
mHandlingCompositions.AppendElement(
HandlingCompositionData(aCompositionEvent.mCompositionId));
}
mHandlingCompositions.LastElement().mSentCommitEvent =
aCompositionEvent.CausesDOMCompositionEndEvent();
MOZ_ASSERT(mHandlingCompositions.LastElement().mCompositionId ==
aCompositionEvent.mCompositionId);
if (!WidgetHasComposition()) {
// mCompositionStart will be reset when commit event is completely handled
// in the remote process.
if (mHandlingCompositions.Length() == 1u) {
mPendingCommitLength = aCompositionEvent.mData.Length();
}
MOZ_ASSERT(HasPendingCommit());
} else if (aCompositionEvent.mMessage != eCompositionStart) {
mHandlingCompositions.LastElement().mCompositionString =
aCompositionEvent.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 (aCompositionEvent.mMessage == eCompositionCommitAsIs) {
*mCommitStringByRequest =
mHandlingCompositions.LastElement().mCompositionString;
} else {
MOZ_ASSERT(aCompositionEvent.mMessage == eCompositionChange ||
aCompositionEvent.mMessage == eCompositionCommit);
*mCommitStringByRequest = aCompositionEvent.mData;
}
// We need to wait eCompositionCommitRequestHandled from the remote process
// in this case. Therefore, mPendingEventsNeedingAck needs to be
// incremented here.
if (!WidgetHasComposition()) {
mHandlingCompositions.LastElement().mPendingEventsNeedingAck++;
}
return false;
}
mHandlingCompositions.LastElement().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 }), "
"PendingEventsNeedingAck()=%u, WidgetHasComposition()=%s, "
"mHandlingCompositions.Length()=%zu, HasPendingCommit()=%s, "
"mIsChildIgnoringCompositionEvents=%s",
this, ToChar(aSelectionEvent.mMessage), aSelectionEvent.mOffset,
aSelectionEvent.mLength, GetBoolName(aSelectionEvent.mReversed),
GetBoolName(aSelectionEvent.mExpandToClusterBoundary),
GetBoolName(aSelectionEvent.mUseNativeLineBreak),
PendingEventsNeedingAck(), GetBoolName(WidgetHasComposition()),
mHandlingCompositions.Length(), GetBoolName(HasPendingCommit()),
GetBoolName(mIsChildIgnoringCompositionEvents)));
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED && !defined(FUZZING_SNAPSHOT)
mDispatchedEventMessages.AppendElement(aSelectionEvent.mMessage);
#endif // MOZ_DIAGNOSTIC_ASSERT_ENABLED
mPendingSetSelectionEventNeedingAck++;
}
void ContentCacheInParent::OnEventNeedingAckHandled(nsIWidget* aWidget,
EventMessage aMessage,
uint32_t aCompositionId) {
// This is called when the child process receives WidgetCompositionEvent or
// WidgetSelectionEvent.
HandlingCompositionData* handlingCompositionData =
aMessage != eSetSelection ? GetHandlingCompositionData(aCompositionId)
: nullptr;
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("0x%p OnEventNeedingAckHandled(aWidget=0x%p, aMessage=%s, "
"aCompositionId=%" PRIu32
"), PendingEventsNeedingAck()=%u, WidgetHasComposition()=%s, "
"mHandlingCompositions.Length()=%zu, HasPendingCommit()=%s, "
"mIsChildIgnoringCompositionEvents=%s, handlingCompositionData=0x%p",
this, aWidget, ToChar(aMessage), aCompositionId,
PendingEventsNeedingAck(), GetBoolName(WidgetHasComposition()),
mHandlingCompositions.Length(), GetBoolName(HasPendingCommit()),
GetBoolName(mIsChildIgnoringCompositionEvents),
handlingCompositionData));
// If we receive composition event messages for older one or invalid one,
// we should ignore them.
if (NS_WARN_IF(aMessage != eSetSelection && !handlingCompositionData)) {
return;
}
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED && !defined(FUZZING_SNAPSHOT)
mReceivedEventMessages.AppendElement(aMessage);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
const 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));
const bool hasPendingCommit = HasPendingCommit();
if (isCommittedInChild) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED && !defined(FUZZING_SNAPSHOT)
if (mHandlingCompositions.Length() == 1u) {
RemoveUnnecessaryEventMessageLog();
}
if (NS_WARN_IF(aMessage != eCompositionCommitRequestHandled &&
!handlingCompositionData->mSentCommitEvent)) {
nsPrintfCString info(
"\nReceived unexpected commit event message (%s) which we've "
"not sent yet\n\n",
ToChar(aMessage));
AppendEventMessageLog(info);
CrashReporter::AppendAppNotesToCrashReport(info);
MOZ_DIAGNOSTIC_ASSERT(
false,
"Received unexpected commit event which has not been sent yet");
}
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
// This should not occur, though. If we receive a commit notification for
// not the oldest composition, we should forget all older compositions.
size_t numberOfOutdatedCompositions = 1u;
for (auto& data : mHandlingCompositions) {
if (&data == handlingCompositionData) {
if (
// Don't put the info into the log when we've already sent commit
// event because it may be just inserting a character without
// composing state, but the remote process may move focus at
// eCompositionStart. This may happen with UI of IME to put only
// one character, e.g., the default Emoji picker of Windows.
!data.mSentCommitEvent &&
// In the normal case, only one message should remain, however,
// remaining 2 or more messages is also valid, for example, the
// remote process may have a composition update listener which
// takes a while. Then, we can have multiple pending messages.
data.mPendingEventsNeedingAck >= 1u) {
MOZ_LOG(
sContentCacheLog, LogLevel::Debug,
(" NOTE: BrowserParent has %" PRIu32
" pending composition messages for the handling composition, "
"but before they are handled in the remote process, the active "
"composition is commited by a request. "
"OnEventNeedingAckHandled() calls for them will be ignored",
data.mPendingEventsNeedingAck));
}
break;
}
if (MOZ_UNLIKELY(data.mPendingEventsNeedingAck)) {
MOZ_LOG(sContentCacheLog, LogLevel::Warning,
(" BrowserParent has %" PRIu32
" pending composition messages for an older composition than "
"the handling composition, but it'll be removed because newer "
"composition gets comitted in the remote process",
data.mPendingEventsNeedingAck));
}
numberOfOutdatedCompositions++;
}
mHandlingCompositions.RemoveElementsAt(0u, numberOfOutdatedCompositions);
handlingCompositionData = nullptr;
// 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 synchronously.
mPendingCommitLength = 0;
}
if (WidgetCompositionEvent::IsFollowedByCompositionEnd(aMessage)) {
// After the remote process receives eCompositionCommit(AsIs) event,
// it'll restart to handle composition events.
mIsChildIgnoringCompositionEvents = false;
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED && !defined(FUZZING_SNAPSHOT)
if (NS_WARN_IF(!hasPendingCommit)) {
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
} else if (aMessage == eCompositionCommitRequestHandled && hasPendingCommit) {
// 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 (mHandlingCompositions.IsEmpty()) {
mCompositionStart.reset();
}
if (handlingCompositionData) {
if (NS_WARN_IF(!handlingCompositionData->mPendingEventsNeedingAck)) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED && !defined(FUZZING_SNAPSHOT)
nsPrintfCString info(
"\nThere is no pending events but received %s "
"message from the remote child\n\n",
ToChar(aMessage));
AppendEventMessageLog(info);
CrashReporter::AppendAppNotesToCrashReport(info);
MOZ_DIAGNOSTIC_ASSERT(
false, "No pending event message but received unexpected event");
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
} else {
handlingCompositionData->mPendingEventsNeedingAck--;
}
} else if (aMessage == eSetSelection) {
if (NS_WARN_IF(!mPendingSetSelectionEventNeedingAck)) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED && !defined(FUZZING_SNAPSHOT)
nsAutoCString info(
"\nThere is no pending set selection events but received from the "
"remote child\n\n");
AppendEventMessageLog(info);
CrashReporter::AppendAppNotesToCrashReport(info);
MOZ_DIAGNOSTIC_ASSERT(
false, "No pending event message but received unexpected event");
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
} else {
mPendingSetSelectionEventNeedingAck--;
}
}
if (!PendingEventsNeedingAck()) {
FlushPendingNotifications(aWidget);
}
}
bool ContentCacheInParent::RequestIMEToCommitComposition(
nsIWidget* aWidget, bool aCancel, uint32_t aCompositionId,
nsAString& aCommittedString) {
HandlingCompositionData* const handlingCompositionData =
GetHandlingCompositionData(aCompositionId);
MOZ_LOG(
sContentCacheLog, LogLevel::Info,
("0x%p RequestToCommitComposition(aWidget=%p, "
"aCancel=%s, aCompositionId=%" PRIu32
"), mHandlingCompositions.Length()=%zu, HasPendingCommit()=%s, "
"mIsChildIgnoringCompositionEvents=%s, "
"IMEStateManager::DoesBrowserParentHaveIMEFocus(&mBrowserParent)=%s, "
"WidgetHasComposition()=%s, mCommitStringByRequest=%p, "
"handlingCompositionData=0x%p",
this, aWidget, GetBoolName(aCancel), aCompositionId,
mHandlingCompositions.Length(), GetBoolName(HasPendingCommit()),
GetBoolName(mIsChildIgnoringCompositionEvents),
GetBoolName(
IMEStateManager::DoesBrowserParentHaveIMEFocus(&mBrowserParent)),
GetBoolName(WidgetHasComposition()), mCommitStringByRequest,
handlingCompositionData));
MOZ_ASSERT(!mCommitStringByRequest);
// If we don't know the composition ID, it must have already been committed
// in this process. In the case, we should do nothing here.
if (NS_WARN_IF(!handlingCompositionData)) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eToUnknownCompositionReceived);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
return false;
}
// If we receive a commit result for not latest composition, 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 (handlingCompositionData != &mHandlingCompositions.LastElement()) {
#if MOZ_DIAGNOSTIC_ASSERT_ENABLED
mRequestIMEToCommitCompositionResults.AppendElement(
RequestIMEToCommitCompositionResult::eToOldCompositionReceived);
#endif // #if MOZ_DIAGNOSTIC_ASSERT_ENABLED
return false;
}
// If the composition has already been commit, th remote process will receive
// composition events and clean up TextComposition. So, this should 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 (handlingCompositionData->mSentCommitEvent) {
#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 = handlingCompositionData->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.
handlingCompositionData->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;
}
// If we receive a request for different composition, we must have already
// sent a commit event. So the remote process should handle it.
// XXX I think that this should never happen because we already checked
// whether handlingCompositionData is the latest composition or not.
// However, we don't want to commit different composition for the users.
// Therefore, let's handle the odd case here.