mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
266 lines
9.5 KiB
C++
266 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=2 sw=2 et tw=78: */
|
|
/* 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/. */
|
|
|
|
/* the caret is the text cursor used, e.g., when editing */
|
|
|
|
#ifndef nsCaret_h__
|
|
#define nsCaret_h__
|
|
|
|
#include "mozilla/MemoryReporting.h"
|
|
#include "nsCoord.h"
|
|
#include "nsISelectionListener.h"
|
|
#include "nsIWeakReferenceUtils.h"
|
|
#include "CaretAssociationHint.h"
|
|
#include "nsPoint.h"
|
|
#include "nsRect.h"
|
|
|
|
class nsDisplayListBuilder;
|
|
class nsFrameSelection;
|
|
class nsIContent;
|
|
class nsIDOMNode;
|
|
class nsIFrame;
|
|
class nsINode;
|
|
class nsIPresShell;
|
|
class nsITimer;
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
class Selection;
|
|
} // namespace dom
|
|
namespace gfx {
|
|
class DrawTarget;
|
|
} // namespace gfx
|
|
} // namespace mozilla
|
|
|
|
//-----------------------------------------------------------------------------
|
|
class nsCaret final : public nsISelectionListener
|
|
{
|
|
typedef mozilla::gfx::DrawTarget DrawTarget;
|
|
|
|
public:
|
|
nsCaret();
|
|
|
|
protected:
|
|
virtual ~nsCaret();
|
|
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
typedef mozilla::CaretAssociationHint CaretAssociationHint;
|
|
|
|
nsresult Init(nsIPresShell *inPresShell);
|
|
void Terminate();
|
|
|
|
void SetSelection(nsISelection *aDOMSel);
|
|
nsISelection* GetSelection();
|
|
|
|
/**
|
|
* Sets whether the caret should only be visible in nodes that are not
|
|
* user-modify: read-only, or whether it should be visible in all nodes.
|
|
*
|
|
* @param aIgnoreUserModify true to have the cursor visible in all nodes,
|
|
* false to have it visible in all nodes except
|
|
* those with user-modify: read-only
|
|
*/
|
|
void SetIgnoreUserModify(bool aIgnoreUserModify);
|
|
/** SetVisible will set the visibility of the caret
|
|
* @param inMakeVisible true to show the caret, false to hide it
|
|
*/
|
|
void SetVisible(bool intMakeVisible);
|
|
/** IsVisible will get the visibility of the caret.
|
|
* This returns false if the caret is hidden because it was set
|
|
* to not be visible, or because the selection is not collapsed, or
|
|
* because an open popup is hiding the caret.
|
|
* It does not take account of blinking or the caret being hidden
|
|
* because we're in non-editable/disabled content.
|
|
*/
|
|
bool IsVisible();
|
|
/**
|
|
* AddForceHide() increases mHideCount and hide the caret even if
|
|
* SetVisible(true) has been or will be called. This is useful when the
|
|
* caller wants to hide caret temporarily and it needs to cancel later.
|
|
* Especially, in the latter case, it's too difficult to decide if the
|
|
* caret should be actually visible or not because caret visible state
|
|
* is set from a lot of event handlers. So, it's very stateful.
|
|
*/
|
|
void AddForceHide();
|
|
/**
|
|
* RemoveForceHide() decreases mHideCount if it's over 0.
|
|
* If the value becomes 0, this may show the caret if SetVisible(true)
|
|
* has been called.
|
|
*/
|
|
void RemoveForceHide();
|
|
/** SetCaretReadOnly set the appearance of the caret
|
|
* @param inMakeReadonly true to show the caret in a 'read only' state,
|
|
* false to show the caret in normal, editing state
|
|
*/
|
|
void SetCaretReadOnly(bool inMakeReadonly);
|
|
/**
|
|
* @param aVisibility true if the caret should be visible even when the
|
|
* selection is not collapsed.
|
|
*/
|
|
void SetVisibilityDuringSelection(bool aVisibility);
|
|
|
|
/**
|
|
* Set the caret's position explicitly to the specified node and offset
|
|
* instead of tracking its selection.
|
|
* Passing null for aNode would set the caret to track its selection again.
|
|
**/
|
|
void SetCaretPosition(nsIDOMNode* aNode, int32_t aOffset);
|
|
|
|
/**
|
|
* Schedule a repaint for the frame where the caret would appear.
|
|
* Does not check visibility etc.
|
|
*/
|
|
void SchedulePaint();
|
|
|
|
/**
|
|
* Returns a frame to paint in, and the bounds of the painted caret
|
|
* relative to that frame.
|
|
* The rectangle includes bidi decorations.
|
|
* Returns null if the caret should not be drawn (including if it's blinked
|
|
* off).
|
|
*/
|
|
nsIFrame* GetPaintGeometry(nsRect* aRect);
|
|
/**
|
|
* A simple wrapper around GetGeometry. Does not take any caret state into
|
|
* account other than the current selection.
|
|
*/
|
|
nsIFrame* GetGeometry(nsRect* aRect)
|
|
{
|
|
return GetGeometry(GetSelection(), aRect);
|
|
}
|
|
|
|
/** PaintCaret
|
|
* Actually paint the caret onto the given rendering context.
|
|
*/
|
|
void PaintCaret(nsDisplayListBuilder *aBuilder,
|
|
DrawTarget& aDrawTarget,
|
|
nsIFrame *aForFrame,
|
|
const nsPoint &aOffset);
|
|
|
|
//nsISelectionListener interface
|
|
NS_DECL_NSISELECTIONLISTENER
|
|
|
|
/**
|
|
* Gets the position and size of the caret that would be drawn for
|
|
* the focus node/offset of aSelection (assuming it would be drawn,
|
|
* i.e., disregarding blink status). The geometry is stored in aRect,
|
|
* and we return the frame aRect is relative to.
|
|
* Only looks at the focus node of aSelection, so you can call it even if
|
|
* aSelection is not collapsed.
|
|
* This rect does not include any extra decorations for bidi.
|
|
* @param aRect must be non-null
|
|
*/
|
|
static nsIFrame* GetGeometry(nsISelection* aSelection,
|
|
nsRect* aRect);
|
|
static nsresult GetCaretFrameForNodeOffset(nsFrameSelection* aFrameSelection,
|
|
nsIContent* aContentNode,
|
|
int32_t aOffset,
|
|
CaretAssociationHint aFrameHint,
|
|
uint8_t aBidiLevel,
|
|
nsIFrame** aReturnFrame,
|
|
int32_t* aReturnOffset);
|
|
static nsRect GetGeometryForFrame(nsIFrame* aFrame,
|
|
int32_t aFrameOffset,
|
|
nscoord* aBidiIndicatorSize);
|
|
|
|
// Get the frame and frame offset based on the focus node and focus offset
|
|
// of aSelection. If aOverrideNode and aOverride are provided, use them
|
|
// instead.
|
|
// @param aFrameOffset return the frame offset if non-null.
|
|
// @return the frame of the focus node.
|
|
static nsIFrame* GetFrameAndOffset(mozilla::dom::Selection* aSelection,
|
|
nsINode* aOverrideNode,
|
|
int32_t aOverrideOffset,
|
|
int32_t* aFrameOffset);
|
|
|
|
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
|
|
|
|
protected:
|
|
static void CaretBlinkCallback(nsITimer *aTimer, void *aClosure);
|
|
|
|
void CheckSelectionLanguageChange();
|
|
|
|
void ResetBlinking();
|
|
void StopBlinking();
|
|
|
|
mozilla::dom::Selection* GetSelectionInternal();
|
|
|
|
struct Metrics {
|
|
nscoord mBidiIndicatorSize; // width and height of bidi indicator
|
|
nscoord mCaretWidth; // full caret width including bidi indicator
|
|
};
|
|
static Metrics ComputeMetrics(nsIFrame* aFrame, int32_t aOffset,
|
|
nscoord aCaretHeight);
|
|
|
|
void ComputeCaretRects(nsIFrame* aFrame, int32_t aFrameOffset,
|
|
nsRect* aCaretRect, nsRect* aHookRect);
|
|
|
|
// Returns true if we should not draw the caret because of XUL menu popups.
|
|
// The caret should be hidden if:
|
|
// 1. An open popup contains the caret, but a menu popup exists before the
|
|
// caret-owning popup in the popup list (i.e. a menu is in front of the
|
|
// popup with the caret). If the menu itself contains the caret we don't
|
|
// hide it.
|
|
// 2. A menu popup is open, but there is no caret present in any popup.
|
|
// 3. The caret selection is empty.
|
|
bool IsMenuPopupHidingCaret();
|
|
|
|
nsWeakPtr mPresShell;
|
|
nsWeakPtr mDomSelectionWeak;
|
|
|
|
nsCOMPtr<nsITimer> mBlinkTimer;
|
|
|
|
/**
|
|
* The content to draw the caret at. If null, we use mDomSelectionWeak's
|
|
* focus node instead.
|
|
*/
|
|
nsCOMPtr<nsINode> mOverrideContent;
|
|
/**
|
|
* The character offset to draw the caret at.
|
|
* Ignored if mOverrideContent is null.
|
|
*/
|
|
int32_t mOverrideOffset;
|
|
/**
|
|
* mBlinkCount is used to control the number of times to blink the caret
|
|
* before stopping the blink. This is reset each time we reset the
|
|
* blinking.
|
|
*/
|
|
int32_t mBlinkCount;
|
|
/**
|
|
* mHideCount is not 0, it means that somebody doesn't want the caret
|
|
* to be visible. See AddForceHide() and RemoveForceHide().
|
|
*/
|
|
uint32_t mHideCount;
|
|
|
|
/**
|
|
* mIsBlinkOn is true when we're in a blink cycle where the caret is on.
|
|
*/
|
|
bool mIsBlinkOn;
|
|
/**
|
|
* mIsVisible is true when SetVisible was last called with 'true'.
|
|
*/
|
|
bool mVisible;
|
|
/**
|
|
* mReadOnly is true when the caret is set to "read only" mode (i.e.,
|
|
* it doesn't blink).
|
|
*/
|
|
bool mReadOnly;
|
|
/**
|
|
* mShowDuringSelection is true when the caret should be shown even when
|
|
* the selection is not collapsed.
|
|
*/
|
|
bool mShowDuringSelection;
|
|
/**
|
|
* mIgnoreUserModify is true when the caret should be shown even when
|
|
* it's in non-user-modifiable content.
|
|
*/
|
|
bool mIgnoreUserModify;
|
|
};
|
|
|
|
#endif //nsCaret_h__
|