forked from mirrors/gecko-dev
407 lines
13 KiB
C++
407 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsTextControlFrame_h___
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#define nsTextControlFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsIContent.h"
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#include "nsITextControlFrame.h"
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#include "nsITextControlElement.h"
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#include "nsIStatefulFrame.h"
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class nsISelectionController;
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class EditorInitializerEntryTracker;
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class nsTextEditorState;
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namespace mozilla {
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class TextEditor;
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enum class CSSPseudoElementType : uint8_t;
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namespace dom {
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class Element;
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} // namespace dom
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} // namespace mozilla
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class nsTextControlFrame final : public nsContainerFrame,
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public nsIAnonymousContentCreator,
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public nsITextControlFrame,
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public nsIStatefulFrame
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{
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsTextControlFrame)
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NS_DECLARE_FRAME_PROPERTY_DELETABLE(ContentScrollPos, nsPoint)
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explicit nsTextControlFrame(nsStyleContext* aContext);
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virtual ~nsTextControlFrame();
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virtual void DestroyFrom(nsIFrame* aDestructRoot, PostDestroyData& aPostDestroyData) override;
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virtual nsIScrollableFrame* GetScrollTargetFrame() override {
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return do_QueryFrame(PrincipalChildList().FirstChild());
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}
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virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
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virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override;
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virtual mozilla::LogicalSize
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ComputeAutoSize(gfxContext* aRenderingContext,
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mozilla::WritingMode aWM,
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const mozilla::LogicalSize& aCBSize,
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nscoord aAvailableISize,
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const mozilla::LogicalSize& aMargin,
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const mozilla::LogicalSize& aBorder,
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const mozilla::LogicalSize& aPadding,
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ComputeSizeFlags aFlags) override;
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virtual void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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bool GetVerticalAlignBaseline(mozilla::WritingMode aWM,
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nscoord* aBaseline) const override
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{
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return GetNaturalBaselineBOffset(aWM, BaselineSharingGroup::eFirst, aBaseline);
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}
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bool GetNaturalBaselineBOffset(mozilla::WritingMode aWM,
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BaselineSharingGroup aBaselineGroup,
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nscoord* aBaseline) const override
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{
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if (!IsSingleLineTextControl()) {
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return false;
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}
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NS_ASSERTION(mFirstBaseline != NS_INTRINSIC_WIDTH_UNKNOWN,
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"please call Reflow before asking for the baseline");
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if (aBaselineGroup == BaselineSharingGroup::eFirst) {
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*aBaseline = mFirstBaseline;
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} else {
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*aBaseline = BSize(aWM) - mFirstBaseline;
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}
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return true;
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}
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virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual bool IsXULCollapsed() override;
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#ifdef ACCESSIBILITY
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virtual mozilla::a11y::AccType AccessibleType() override;
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#endif
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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aResult.AssignLiteral("nsTextControlFrame");
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return NS_OK;
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}
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#endif
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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// nsStackFrame is already both of these, but that's somewhat bogus,
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// and we really mean it.
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return nsContainerFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
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}
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#ifdef DEBUG
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void MarkIntrinsicISizesDirty() override
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{
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// Need another Reflow to have a correct baseline value again.
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mFirstBaseline = NS_INTRINSIC_WIDTH_UNKNOWN;
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}
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#endif
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// nsIAnonymousContentCreator
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virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
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virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilter) override;
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virtual void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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virtual mozilla::dom::Element*
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GetPseudoElement(mozilla::CSSPseudoElementType aType) override;
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//==== BEGIN NSIFORMCONTROLFRAME
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virtual void SetFocus(bool aOn , bool aRepaint) override;
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virtual nsresult SetFormProperty(nsAtom* aName, const nsAString& aValue) override;
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//==== END NSIFORMCONTROLFRAME
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//==== NSITEXTCONTROLFRAME
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NS_IMETHOD_(already_AddRefed<mozilla::TextEditor>) GetTextEditor() override;
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NS_IMETHOD SetSelectionRange(uint32_t aSelectionStart,
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uint32_t aSelectionEnd,
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SelectionDirection aDirection = eNone) override;
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NS_IMETHOD GetOwnedSelectionController(nsISelectionController** aSelCon) override;
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virtual nsFrameSelection* GetOwnedFrameSelection() override;
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/**
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* Ensure mEditor is initialized with the proper flags and the default value.
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* @throws NS_ERROR_NOT_INITIALIZED if mEditor has not been created
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* @throws various and sundry other things
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*/
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virtual nsresult EnsureEditorInitialized() override;
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//==== END NSITEXTCONTROLFRAME
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//==== NSISTATEFULFRAME
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NS_IMETHOD SaveState(nsPresState** aState) override;
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NS_IMETHOD RestoreState(nsPresState* aState) override;
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//=== END NSISTATEFULFRAME
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//==== OVERLOAD of nsIFrame
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/** handler for attribute changes to mContent */
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) override;
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void GetText(nsString& aText);
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virtual nsresult PeekOffset(nsPeekOffsetStruct *aPos) override;
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NS_DECL_QUERYFRAME
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protected:
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/**
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* Launch the reflow on the child frames - see nsTextControlFrame::Reflow()
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*/
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void ReflowTextControlChild(nsIFrame* aFrame,
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nsPresContext* aPresContext,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus,
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ReflowOutput& aParentDesiredSize);
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public: //for methods who access nsTextControlFrame directly
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void SetValueChanged(bool aValueChanged);
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mozilla::dom::Element* GetRootNode() const {
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return mRootNode;
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}
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mozilla::dom::Element* GetPlaceholderNode() const {
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return mPlaceholderDiv;
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}
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mozilla::dom::Element* GetPreviewNode() const {
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return mPreviewDiv;
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}
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// called by the focus listener
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nsresult MaybeBeginSecureKeyboardInput();
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void MaybeEndSecureKeyboardInput();
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#define DEFINE_TEXTCTRL_CONST_FORWARDER(type, name) \
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type name() const { \
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nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent()); \
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NS_ASSERTION(txtCtrl, "Content not a text control element"); \
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return txtCtrl->name(); \
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}
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DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsSingleLineTextControl)
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DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsTextArea)
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DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsPasswordTextControl)
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DEFINE_TEXTCTRL_CONST_FORWARDER(int32_t, GetCols)
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DEFINE_TEXTCTRL_CONST_FORWARDER(int32_t, GetWrapCols)
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DEFINE_TEXTCTRL_CONST_FORWARDER(int32_t, GetRows)
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#undef DEFINE_TEXTCTRL_CONST_FORWARDER
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protected:
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class EditorInitializer;
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friend class EditorInitializer;
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friend class nsTextEditorState; // needs access to UpdateValueDisplay
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// Temp reference to scriptrunner
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NS_DECLARE_FRAME_PROPERTY_WITH_DTOR(TextControlInitializer,
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EditorInitializer,
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nsTextControlFrame::RevokeInitializer)
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static void
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RevokeInitializer(EditorInitializer* aInitializer) {
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aInitializer->Revoke();
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};
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class EditorInitializer : public mozilla::Runnable {
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public:
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explicit EditorInitializer(nsTextControlFrame* aFrame)
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: mozilla::Runnable("nsTextControlFrame::EditorInitializer")
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, mFrame(aFrame)
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{
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}
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NS_IMETHOD Run() override;
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// avoids use of AutoWeakFrame
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void Revoke() {
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mFrame = nullptr;
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}
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private:
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nsTextControlFrame* mFrame;
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};
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class ScrollOnFocusEvent;
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friend class ScrollOnFocusEvent;
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class ScrollOnFocusEvent : public mozilla::Runnable {
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public:
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explicit ScrollOnFocusEvent(nsTextControlFrame* aFrame)
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: mozilla::Runnable("nsTextControlFrame::ScrollOnFocusEvent")
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, mFrame(aFrame)
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{
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}
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NS_DECL_NSIRUNNABLE
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void Revoke() {
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mFrame = nullptr;
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}
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private:
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nsTextControlFrame* mFrame;
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};
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nsresult OffsetToDOMPoint(uint32_t aOffset, nsIDOMNode** aResult, uint32_t* aPosition);
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/**
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* Update the textnode under our anonymous div to show the new
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* value. This should only be called when we have no editor yet.
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* @throws NS_ERROR_UNEXPECTED if the div has no text content
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*/
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nsresult UpdateValueDisplay(bool aNotify,
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bool aBeforeEditorInit = false,
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const nsAString *aValue = nullptr);
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/**
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* Get the maxlength attribute
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* @param aMaxLength the value of the max length attr
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* @returns false if attr not defined
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*/
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bool GetMaxLength(int32_t* aMaxLength);
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/**
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* Find out whether an attribute exists on the content or not.
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* @param aAtt the attribute to determine the existence of
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* @returns false if it does not exist
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*/
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bool AttributeExists(nsAtom *aAtt) const
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{ return mContent && mContent->HasAttr(kNameSpaceID_None, aAtt); }
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/**
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* We call this when we are being destroyed or removed from the PFM.
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* @param aPresContext the current pres context
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*/
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void PreDestroy();
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// Compute our intrinsic size. This does not include any borders, paddings,
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// etc. Just the size of our actual area for the text (and the scrollbars,
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// for <textarea>).
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mozilla::LogicalSize CalcIntrinsicSize(gfxContext* aRenderingContext,
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mozilla::WritingMode aWM,
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float aFontSizeInflation) const;
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nsresult ScrollSelectionIntoView() override;
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private:
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//helper methods
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nsresult SetSelectionInternal(nsIDOMNode *aStartNode, uint32_t aStartOffset,
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nsIDOMNode *aEndNode, uint32_t aEndOffset,
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SelectionDirection aDirection = eNone);
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nsresult SelectAllOrCollapseToEndOfText(bool aSelect);
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nsresult SetSelectionEndPoints(uint32_t aSelStart, uint32_t aSelEnd,
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SelectionDirection aDirection = eNone);
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/**
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* Return the root DOM element, and implicitly initialize the editor if
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* needed.
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*
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* XXXbz This function is slow. Very slow. Consider using
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* EnsureEditorInitialized() if you need that, and
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* nsITextControlElement::GetRootEditorNode on our content if you need that.
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*/
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nsresult GetRootNodeAndInitializeEditor(nsIDOMElement **aRootElement);
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void FinishedInitializer() {
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DeleteProperty(TextControlInitializer());
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}
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const nsAString& CachedValue() const
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{
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return mCachedValue;
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}
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void ClearCachedValue()
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{
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mCachedValue.SetIsVoid(true);
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}
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void CacheValue(const nsAString& aValue)
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{
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mCachedValue.Assign(aValue);
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}
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MOZ_MUST_USE bool
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CacheValue(const nsAString& aValue, const mozilla::fallible_t& aFallible)
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{
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if (!mCachedValue.Assign(aValue, aFallible)) {
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ClearCachedValue();
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return false;
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}
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return true;
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}
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private:
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class nsAnonDivObserver;
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nsresult CreateRootNode();
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void CreatePlaceholderIfNeeded();
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void CreatePreviewIfNeeded();
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bool ShouldInitializeEagerly() const;
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void InitializeEagerlyIfNeeded();
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RefPtr<mozilla::dom::Element> mRootNode;
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RefPtr<mozilla::dom::Element> mPlaceholderDiv;
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RefPtr<mozilla::dom::Element> mPreviewDiv;
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RefPtr<nsAnonDivObserver> mMutationObserver;
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// Cache of the |.value| of <input> or <textarea> element without hard-wrap.
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// If its IsVoid() returns true, it doesn't cache |.value|.
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// Otherwise, it's cached when setting specific value or getting value from
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// TextEditor. Additionally, when contents in the anonymous <div> element
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// is modified, this is cleared.
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//
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// FIXME(bug 1402545): Consider using an nsAutoString here.
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nsString mCachedValue;
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// Our first baseline, or NS_INTRINSIC_WIDTH_UNKNOWN if we have a pending
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// Reflow.
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nscoord mFirstBaseline;
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// these packed bools could instead use the high order bits on mState, saving 4 bytes
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bool mEditorHasBeenInitialized;
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bool mIsProcessing;
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#ifdef DEBUG
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bool mInEditorInitialization;
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friend class EditorInitializerEntryTracker;
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#endif
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nsRevocableEventPtr<ScrollOnFocusEvent> mScrollEvent;
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};
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#endif
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