本文整理汇总了C++中Selection::IsCollapsed方法的典型用法代码示例。如果您正苦于以下问题：C++ Selection::IsCollapsed方法的具体用法？C++ Selection::IsCollapsed怎么用？C++ Selection::IsCollapsed使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Selection的用法示例。
在下文中一共展示了Selection::IsCollapsed方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: AccCaretMoveEvent
void
SelectionManager::ProcessTextSelChangeEvent(AccEvent* aEvent)
{
AccTextSelChangeEvent* event = downcast_accEvent(aEvent);
Selection* sel = static_cast<Selection*>(event->mSel.get());
// Fire selection change event if it's not pure caret-move selection change.
if (sel->GetRangeCount() != 1 || !sel->IsCollapsed())
nsEventShell::FireEvent(aEvent);
// Fire caret move event if there's a caret in the selection.
nsINode* caretCntrNode =
nsCoreUtils::GetDOMNodeFromDOMPoint(sel->GetFocusNode(),
sel->GetFocusOffset());
if (!caretCntrNode)
return;
HyperTextAccessible* caretCntr = nsAccUtils::GetTextContainer(caretCntrNode);
NS_ASSERTION(caretCntr,
"No text container for focus while there's one for common ancestor?!");
if (!caretCntr)
return;
int32_t caretOffset = -1;
if (NS_SUCCEEDED(caretCntr->GetCaretOffset(&caretOffset)) && caretOffset != -1) {
nsRefPtr<AccCaretMoveEvent> caretMoveEvent =
new AccCaretMoveEvent(caretCntr, caretOffset, aEvent->FromUserInput());
nsEventShell::FireEvent(caretMoveEvent);
}
}示例2: GetSelection
AccessibleCaretManager::CaretMode
AccessibleCaretManager::GetCaretMode() const
{
Selection* selection = GetSelection();
if (!selection) {
return CaretMode::None;
}
uint32_t rangeCount = selection->RangeCount();
if (rangeCount <= 0) {
return CaretMode::None;
}
if (selection->IsCollapsed()) {
return CaretMode::Cursor;
}
return CaretMode::Selection;
}示例3: FlushLayout
void
AccessibleCaretManager::DispatchCaretStateChangedEvent(CaretChangedReason aReason) const
{
// Holding PresShell to prevent AccessibleCaretManager to be destroyed.
nsCOMPtr<nsIPresShell> presShell = mPresShell;
FlushLayout();
if (presShell->IsDestroying()) {
return;
}
Selection* sel = GetSelection();
if (!sel) {
return;
}
nsIDocument* doc = mPresShell->GetDocument();
MOZ_ASSERT(doc);
CaretStateChangedEventInit init;
init.mBubbles = true;
const nsRange* range = sel->GetAnchorFocusRange();
nsINode* commonAncestorNode = nullptr;
if (range) {
commonAncestorNode = range->GetCommonAncestor();
}
if (!commonAncestorNode) {
commonAncestorNode = sel->GetFrameSelection()->GetAncestorLimiter();
}
RefPtr<DOMRect> domRect = new DOMRect(ToSupports(doc));
nsRect rect = nsLayoutUtils::GetSelectionBoundingRect(sel);
nsIFrame* commonAncestorFrame = nullptr;
nsIFrame* rootFrame = mPresShell->GetRootFrame();
if (commonAncestorNode && commonAncestorNode->IsContent()) {
commonAncestorFrame = commonAncestorNode->AsContent()->GetPrimaryFrame();
}
if (commonAncestorFrame && rootFrame) {
nsLayoutUtils::TransformRect(rootFrame, commonAncestorFrame, rect);
nsRect clampedRect = nsLayoutUtils::ClampRectToScrollFrames(commonAncestorFrame,
rect);
nsLayoutUtils::TransformRect(commonAncestorFrame, rootFrame, clampedRect);
domRect->SetLayoutRect(clampedRect);
init.mSelectionVisible = !clampedRect.IsEmpty();
} else {
domRect->SetLayoutRect(rect);
init.mSelectionVisible = true;
}
// Send isEditable info w/ event detail. This info can help determine
// whether to show cut command on selection dialog or not.
init.mSelectionEditable = commonAncestorFrame &&
GetEditingHostForFrame(commonAncestorFrame);
init.mBoundingClientRect = domRect;
init.mReason = aReason;
init.mCollapsed = sel->IsCollapsed();
init.mCaretVisible = mFirstCaret->IsLogicallyVisible() ||
mSecondCaret->IsLogicallyVisible();
init.mCaretVisuallyVisible = mFirstCaret->IsVisuallyVisible() ||
mSecondCaret->IsVisuallyVisible();
sel->Stringify(init.mSelectedTextContent);
RefPtr<CaretStateChangedEvent> event =
CaretStateChangedEvent::Constructor(doc, NS_LITERAL_STRING("mozcaretstatechanged"), init);
event->SetTrusted(true);
event->GetInternalNSEvent()->mFlags.mOnlyChromeDispatch = true;
AC_LOG("%s: reason %d, collapsed %d, caretVisible %d", __FUNCTION__,
init.mReason, init.mCollapsed, init.mCaretVisible);
(new AsyncEventDispatcher(doc, event))->RunDOMEventWhenSafe();
}示例4: GetSelection
void
AccessibleCaretManager::DispatchCaretStateChangedEvent(CaretChangedReason aReason) const
{
// Holding PresShell to prevent AccessibleCaretManager to be destroyed.
nsCOMPtr<nsIPresShell> presShell = mPresShell;
// XXX: Do we need to flush layout?
presShell->FlushPendingNotifications(Flush_Layout);
if (presShell->IsDestroying()) {
return;
}
Selection* sel = GetSelection();
if (!sel) {
return;
}
nsIDocument* doc = mPresShell->GetDocument();
MOZ_ASSERT(doc);
CaretStateChangedEventInit init;
init.mBubbles = true;
const nsRange* range = sel->GetAnchorFocusRange();
nsINode* commonAncestorNode = nullptr;
if (range) {
commonAncestorNode = range->GetCommonAncestor();
}
if (!commonAncestorNode) {
commonAncestorNode = sel->GetFrameSelection()->GetAncestorLimiter();
}
nsRefPtr<DOMRect> domRect = new DOMRect(ToSupports(doc));
nsRect rect = nsContentUtils::GetSelectionBoundingRect(sel);
nsIFrame* commonAncestorFrame = nullptr;
nsIFrame* rootFrame = mPresShell->GetRootFrame();
if (commonAncestorNode && commonAncestorNode->IsContent()) {
commonAncestorFrame = commonAncestorNode->AsContent()->GetPrimaryFrame();
}
if (commonAncestorFrame && rootFrame) {
nsLayoutUtils::TransformRect(rootFrame, commonAncestorFrame, rect);
nsRect clampedRect = nsLayoutUtils::ClampRectToScrollFrames(commonAncestorFrame,
rect);
nsLayoutUtils::TransformRect(commonAncestorFrame, rootFrame, clampedRect);
domRect->SetLayoutRect(clampedRect);
init.mSelectionVisible = !clampedRect.IsEmpty();
} else {
domRect->SetLayoutRect(rect);
init.mSelectionVisible = true;
}
init.mBoundingClientRect = domRect;
init.mReason = aReason;
init.mCollapsed = sel->IsCollapsed();
init.mCaretVisible = mFirstCaret->IsLogicallyVisible() ||
mSecondCaret->IsLogicallyVisible();
nsRefPtr<CaretStateChangedEvent> event =
CaretStateChangedEvent::Constructor(doc, NS_LITERAL_STRING("mozcaretstatechanged"), init);
event->SetTrusted(true);
event->GetInternalNSEvent()->mFlags.mOnlyChromeDispatch = true;
(new AsyncEventDispatcher(doc, event))->RunDOMEventWhenSafe();
}