gecko-dev/layout/forms/nsTextControlFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef nsTextControlFrame_h___
#define nsTextControlFrame_h___
#include "mozilla/Attributes.h"
#include "nsContainerFrame.h"
#include "nsBlockFrame.h"
#include "nsIFormControlFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsITextControlFrame.h"
#include "nsDisplayList.h"
#include "nsIScrollableFrame.h"
#include "nsStubMutationObserver.h"
#include "nsITextControlElement.h"
#include "nsIStatefulFrame.h"
#include "nsIEditor.h"
class nsISelectionController;
class nsIDOMCharacterData;
class EditorInitializerEntryTracker;
class nsTextEditorState;
namespace mozilla {
namespace dom {
class Element;
}
}
class nsTextControlFrame : public nsContainerFrame,
public nsIAnonymousContentCreator,
public nsITextControlFrame,
public nsIStatefulFrame
{
public:
NS_DECL_FRAMEARENA_HELPERS
NS_DECLARE_FRAME_PROPERTY(ContentScrollPos, DestroyPoint)
nsTextControlFrame(nsIPresShell* aShell, nsStyleContext* aContext);
virtual ~nsTextControlFrame();
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
virtual nsIScrollableFrame* GetScrollTargetFrame() {
if (!IsScrollable())
return nullptr;
return do_QueryFrame(GetFirstPrincipalChild());
}
virtual nscoord GetMinWidth(nsRenderingContext* aRenderingContext);
virtual nscoord GetPrefWidth(nsRenderingContext* aRenderingContext);
virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, bool aShrinkWrap) MOZ_OVERRIDE;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState);
virtual bool IsCollapsed();
virtual bool IsLeaf() const;
#ifdef ACCESSIBILITY
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
#endif
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const
{
aResult.AssignLiteral("nsTextControlFrame");
return NS_OK;
}
#endif
virtual bool IsFrameOfType(uint32_t aFlags) const
{
// nsStackFrame is already both of these, but that's somewhat bogus,
// and we really mean it.
return nsContainerFrame::IsFrameOfType(aFlags &
~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
}
// nsIAnonymousContentCreator
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
uint32_t aFilter) MOZ_OVERRIDE;
// Utility methods to set current widget state
NS_IMETHOD SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) MOZ_OVERRIDE;
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
//==== BEGIN NSIFORMCONTROLFRAME
virtual void SetFocus(bool aOn , bool aRepaint);
virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);
virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const;
//==== END NSIFORMCONTROLFRAME
//==== NSITEXTCONTROLFRAME
NS_IMETHOD GetEditor(nsIEditor **aEditor) MOZ_OVERRIDE;
NS_IMETHOD SetSelectionStart(int32_t aSelectionStart) MOZ_OVERRIDE;
NS_IMETHOD SetSelectionEnd(int32_t aSelectionEnd) MOZ_OVERRIDE;
NS_IMETHOD SetSelectionRange(int32_t aSelectionStart,
int32_t aSelectionEnd,
SelectionDirection aDirection = eNone) MOZ_OVERRIDE;
NS_IMETHOD GetSelectionRange(int32_t* aSelectionStart,
int32_t* aSelectionEnd,
SelectionDirection* aDirection = nullptr) MOZ_OVERRIDE;
NS_IMETHOD GetOwnedSelectionController(nsISelectionController** aSelCon) MOZ_OVERRIDE;
virtual nsFrameSelection* GetOwnedFrameSelection() MOZ_OVERRIDE;
nsresult GetPhonetic(nsAString& aPhonetic) MOZ_OVERRIDE;
/**
* Ensure mEditor is initialized with the proper flags and the default value.
* @throws NS_ERROR_NOT_INITIALIZED if mEditor has not been created
* @throws various and sundry other things
*/
virtual nsresult EnsureEditorInitialized() MOZ_OVERRIDE;
//==== END NSITEXTCONTROLFRAME
//==== NSISTATEFULFRAME
NS_IMETHOD SaveState(nsPresState** aState) MOZ_OVERRIDE;
NS_IMETHOD RestoreState(nsPresState* aState) MOZ_OVERRIDE;
//=== END NSISTATEFULFRAME
//==== OVERLOAD of nsIFrame
virtual nsIAtom* GetType() const;
/** handler for attribute changes to mContent */
NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType);
nsresult GetText(nsString& aText);
NS_IMETHOD PeekOffset(nsPeekOffsetStruct *aPos);
NS_DECL_QUERYFRAME
// Temp reference to scriptrunner
// We could make these auto-Revoking via the "delete" entry for safety
NS_DECLARE_FRAME_PROPERTY(TextControlInitializer, nullptr)
protected:
/**
* Launch the reflow on the child frames - see nsTextControlFrame::Reflow()
*/
void ReflowTextControlChild(nsIFrame* aFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsHTMLReflowMetrics& aParentDesiredSize);
public: //for methods who access nsTextControlFrame directly
void SetValueChanged(bool aValueChanged);
// called by the focus listener
nsresult MaybeBeginSecureKeyboardInput();
void MaybeEndSecureKeyboardInput();
NS_STACK_CLASS class ValueSetter {
public:
ValueSetter(nsIEditor* aEditor)
: mEditor(aEditor)
, mCanceled(false)
{
MOZ_ASSERT(aEditor);
// To protect against a reentrant call to SetValue, we check whether
// another SetValue is already happening for this frame. If it is,
// we must wait until we unwind to re-enable oninput events.
mEditor->GetSuppressDispatchingInputEvent(&mOuterTransaction);
}
void Cancel() {
mCanceled = true;
}
void Init() {
mEditor->SetSuppressDispatchingInputEvent(true);
}
~ValueSetter() {
mEditor->SetSuppressDispatchingInputEvent(mOuterTransaction);
if (mCanceled) {
return;
}
}
private:
nsCOMPtr<nsIEditor> mEditor;
bool mOuterTransaction;
bool mCanceled;
};
friend class ValueSetter;
#define DEFINE_TEXTCTRL_FORWARDER(type, name) \
type name() { \
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent()); \
NS_ASSERTION(txtCtrl, "Content not a text control element"); \
return txtCtrl->name(); \
}
#define DEFINE_TEXTCTRL_CONST_FORWARDER(type, name) \
type name() const { \
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent()); \
NS_ASSERTION(txtCtrl, "Content not a text control element"); \
return txtCtrl->name(); \
}
DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsSingleLineTextControl)
DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsTextArea)
DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsPlainTextControl)
DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsPasswordTextControl)
DEFINE_TEXTCTRL_FORWARDER(int32_t, GetCols)
DEFINE_TEXTCTRL_FORWARDER(int32_t, GetWrapCols)
DEFINE_TEXTCTRL_FORWARDER(int32_t, GetRows)
#undef DEFINE_TEXTCTRL_CONST_FORWARDER
#undef DEFINE_TEXTCTRL_FORWARDER
protected:
class EditorInitializer;
friend class EditorInitializer;
friend class nsTextEditorState; // needs access to UpdateValueDisplay
class EditorInitializer : public nsRunnable {
public:
EditorInitializer(nsTextControlFrame* aFrame) :
mFrame(aFrame) {}
NS_IMETHOD Run();
// avoids use of nsWeakFrame
void Revoke() {
mFrame = nullptr;
}
private:
nsTextControlFrame* mFrame;
};
class ScrollOnFocusEvent;
friend class ScrollOnFocusEvent;
class ScrollOnFocusEvent : public nsRunnable {
public:
ScrollOnFocusEvent(nsTextControlFrame* aFrame) :
mFrame(aFrame) {}
NS_DECL_NSIRUNNABLE
void Revoke() {
mFrame = nullptr;
}
private:
nsTextControlFrame* mFrame;
};
nsresult OffsetToDOMPoint(int32_t aOffset, nsIDOMNode** aResult, int32_t* aPosition);
/**
* Find out whether this control is scrollable (i.e. if it is not a single
* line text control)
* @return whether this control is scrollable
*/
bool IsScrollable() const;
/**
* Update the textnode under our anonymous div to show the new
* value. This should only be called when we have no editor yet.
* @throws NS_ERROR_UNEXPECTED if the div has no text content
*/
nsresult UpdateValueDisplay(bool aNotify,
bool aBeforeEditorInit = false,
const nsAString *aValue = nullptr);
/**
* Get the maxlength attribute
* @param aMaxLength the value of the max length attr
* @returns false if attr not defined
*/
bool GetMaxLength(int32_t* aMaxLength);
/**
* Find out whether an attribute exists on the content or not.
* @param aAtt the attribute to determine the existence of
* @returns false if it does not exist
*/
bool AttributeExists(nsIAtom *aAtt) const
{ return mContent && mContent->HasAttr(kNameSpaceID_None, aAtt); }
/**
* We call this when we are being destroyed or removed from the PFM.
* @param aPresContext the current pres context
*/
void PreDestroy();
// Compute our intrinsic size. This does not include any borders, paddings,
// etc. Just the size of our actual area for the text (and the scrollbars,
// for <textarea>).
nsresult CalcIntrinsicSize(nsRenderingContext* aRenderingContext,
nsSize& aIntrinsicSize,
float aFontSizeInflation);
nsresult ScrollSelectionIntoView() MOZ_OVERRIDE;
private:
//helper methods
nsresult SetSelectionInternal(nsIDOMNode *aStartNode, int32_t aStartOffset,
nsIDOMNode *aEndNode, int32_t aEndOffset,
SelectionDirection aDirection = eNone);
nsresult SelectAllOrCollapseToEndOfText(bool aSelect);
nsresult SetSelectionEndPoints(int32_t aSelStart, int32_t aSelEnd,
SelectionDirection aDirection = eNone);
/**
* Return the root DOM element, and implicitly initialize the editor if needed.
*/
mozilla::dom::Element* GetRootNodeAndInitializeEditor();
nsresult GetRootNodeAndInitializeEditor(nsIDOMElement **aRootElement);
void FinishedInitializer() {
Properties().Delete(TextControlInitializer());
}
private:
// these packed bools could instead use the high order bits on mState, saving 4 bytes
bool mUseEditor;
bool mIsProcessing;
// Keep track if we have asked a placeholder node creation.
bool mUsePlaceholder;
#ifdef DEBUG
bool mInEditorInitialization;
friend class EditorInitializerEntryTracker;
#endif
nsRevocableEventPtr<ScrollOnFocusEvent> mScrollEvent;
};
#endif