bool
ContentCacheInParent::GetTextRect(uint32_t aOffset,
LayoutDeviceIntRect& aTextRect) const
{
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("ContentCacheInParent: 0x%p GetTextRect(aOffset=%u), "
"mTextRectArray={ mStart=%u, mRects.Length()=%u }, "
"mSelection={ mAnchor=%u, mFocus=%u }",
this, aOffset, mTextRectArray.mStart, mTextRectArray.mRects.Length(),
mSelection.mAnchor, mSelection.mFocus));
if (!aOffset) {
NS_WARN_IF(mFirstCharRect.IsEmpty());
aTextRect = mFirstCharRect;
return !aTextRect.IsEmpty();
}
if (aOffset == mSelection.mAnchor) {
NS_WARN_IF(mSelection.mAnchorCharRect.IsEmpty());
aTextRect = mSelection.mAnchorCharRect;
return !aTextRect.IsEmpty();
}
if (aOffset == mSelection.mFocus) {
NS_WARN_IF(mSelection.mFocusCharRect.IsEmpty());
aTextRect = mSelection.mFocusCharRect;
return !aTextRect.IsEmpty();
}
if (!mTextRectArray.InRange(aOffset)) {
aTextRect.SetEmpty();
return false;
}
aTextRect = mTextRectArray.GetRect(aOffset);
return true;
}
bool
ContentCacheInChild::QueryCharRect(nsIWidget* aWidget,
uint32_t aOffset,
LayoutDeviceIntRect& aCharRect) const
{
aCharRect.SetEmpty();
nsEventStatus status = nsEventStatus_eIgnore;
WidgetQueryContentEvent textRect(true, NS_QUERY_TEXT_RECT, 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
ContentCacheInParent::GetCaretRect(uint32_t aOffset,
LayoutDeviceIntRect& aCaretRect) const
{
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("ContentCacheInParent: 0x%p GetCaretRect(aOffset=%u), "
"mCaret={ mOffset=%u, mRect=%s, IsValid()=%s }, mTextRectArray={ "
"mStart=%u, mRects.Length()=%u }, mSelection={ mAnchor=%u, mFocus=%u, "
"mWritingMode=%s, mAnchorCharRect=%s, mFocusCharRect=%s }, "
"mFirstCharRect=%s",
this, aOffset, mCaret.mOffset, GetRectText(mCaret.mRect).get(),
GetBoolName(mCaret.IsValid()), mTextRectArray.mStart,
mTextRectArray.mRects.Length(), mSelection.mAnchor, mSelection.mFocus,
GetWritingModeName(mSelection.mWritingMode).get(),
GetRectText(mSelection.mAnchorCharRect).get(),
GetRectText(mSelection.mFocusCharRect).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, 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, 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::GetUnionTextRects(
uint32_t aOffset,
uint32_t aLength,
LayoutDeviceIntRect& aUnionTextRect) const
{
MOZ_LOG(sContentCacheLog, LogLevel::Info,
("ContentCacheInParent: 0x%p GetUnionTextRects(aOffset=%u, "
"aLength=%u), mTextRectArray={ mStart=%u, mRects.Length()=%u }, "
"mSelection={ mAnchor=%u, mFocus=%u }",
this, aOffset, aLength, 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_WARN_IF(mSelection.mRect.IsEmpty());
aUnionTextRect = mSelection.mRect;
return !aUnionTextRect.IsEmpty();
}
if (aLength == 1) {
if (!aOffset) {
NS_WARN_IF(mFirstCharRect.IsEmpty());
aUnionTextRect = mFirstCharRect;
return !aUnionTextRect.IsEmpty();
}
if (aOffset == mSelection.mAnchor) {
NS_WARN_IF(mSelection.mAnchorCharRect.IsEmpty());
aUnionTextRect = mSelection.mAnchorCharRect;
return !aUnionTextRect.IsEmpty();
}
if (aOffset == mSelection.mFocus) {
NS_WARN_IF(mSelection.mFocusCharRect.IsEmpty());
aUnionTextRect = mSelection.mFocusCharRect;
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 (mTextRectArray.IsOverlappingWith(aOffset, aLength)) {
aUnionTextRect =
mTextRectArray.GetUnionRectAsFarAsPossible(aOffset, aLength);
} else {
aUnionTextRect.SetEmpty();
}
if (!aOffset) {
aUnionTextRect = aUnionTextRect.Union(mFirstCharRect);
}
if (aOffset <= mSelection.mAnchor && mSelection.mAnchor < endOffset.value()) {
aUnionTextRect = aUnionTextRect.Union(mSelection.mAnchorCharRect);
}
if (aOffset <= mSelection.mFocus && mSelection.mFocus < endOffset.value()) {
aUnionTextRect = aUnionTextRect.Union(mSelection.mFocusCharRect);
}
return !aUnionTextRect.IsEmpty();
}
