зеркало из https://github.com/mozilla/gecko-dev.git
439 строки
15 KiB
C++
439 строки
15 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsTextControlFrame_h___
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#define nsTextControlFrame_h___
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#include "nsStackFrame.h"
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#include "nsBlockFrame.h"
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#include "nsIFormControlFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsITextControlFrame.h"
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#include "nsDisplayList.h"
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#include "nsIScrollableFrame.h"
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#include "nsStubMutationObserver.h"
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#include "nsITextControlElement.h"
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#include "nsIStatefulFrame.h"
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class nsIEditor;
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class nsISelectionController;
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class nsIDOMCharacterData;
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#ifdef ACCESSIBILITY
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class nsIAccessible;
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#endif
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class EditorInitializerEntryTracker;
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class nsTextEditorState;
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class nsTextControlFrame : public nsStackFrame,
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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
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NS_DECLARE_FRAME_PROPERTY(ContentScrollPos, DestroyPoint)
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nsTextControlFrame(nsIPresShell* aShell, nsStyleContext* aContext);
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virtual ~nsTextControlFrame();
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virtual void DestroyFrom(nsIFrame* aDestructRoot);
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virtual nsIScrollableFrame* GetScrollTargetFrame() {
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if (!IsScrollable())
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return nsnull;
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return do_QueryFrame(GetFirstChild(nsnull));
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}
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virtual nscoord GetMinWidth(nsRenderingContext* aRenderingContext);
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virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder,
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nsSize aPadding, PRBool aShrinkWrap);
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState);
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virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState);
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virtual nsSize GetMaxSize(nsBoxLayoutState& aBoxLayoutState);
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virtual nscoord GetBoxAscent(nsBoxLayoutState& aBoxLayoutState);
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virtual PRBool IsCollapsed(nsBoxLayoutState& aBoxLayoutState);
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DECL_DO_GLOBAL_REFLOW_COUNT_DSP(nsTextControlFrame, nsStackFrame)
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virtual PRBool IsLeaf() const;
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#ifdef ACCESSIBILITY
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virtual already_AddRefed<nsAccessible> CreateAccessible();
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#endif
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#ifdef NS_DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const
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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 PRBool IsFrameOfType(PRUint32 aFlags) const
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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 nsStackFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
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}
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// nsIAnonymousContentCreator
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virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements);
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virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
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PRUint32 aFilter);
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// Utility methods to set current widget state
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NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
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nsFrameList& aChildList);
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//==== BEGIN NSIFORMCONTROLFRAME
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virtual void SetFocus(PRBool aOn , PRBool aRepaint);
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virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);
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virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const;
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//==== END NSIFORMCONTROLFRAME
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//==== NSITEXTCONTROLFRAME
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NS_IMETHOD GetEditor(nsIEditor **aEditor);
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NS_IMETHOD GetTextLength(PRInt32* aTextLength);
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NS_IMETHOD CheckFireOnChange();
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NS_IMETHOD SetSelectionStart(PRInt32 aSelectionStart);
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NS_IMETHOD SetSelectionEnd(PRInt32 aSelectionEnd);
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NS_IMETHOD SetSelectionRange(PRInt32 aSelectionStart,
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PRInt32 aSelectionEnd,
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SelectionDirection aDirection = eNone);
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NS_IMETHOD GetSelectionRange(PRInt32* aSelectionStart,
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PRInt32* aSelectionEnd,
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SelectionDirection* aDirection = nsnull);
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NS_IMETHOD GetOwnedSelectionController(nsISelectionController** aSelCon);
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virtual nsFrameSelection* GetOwnedFrameSelection();
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nsresult GetPhonetic(nsAString& aPhonetic);
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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();
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//==== END NSITEXTCONTROLFRAME
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//==== NSISTATEFULFRAME
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NS_IMETHOD SaveState(SpecialStateID aStateID, nsPresState** aState);
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NS_IMETHOD RestoreState(nsPresState* aState);
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//=== END NSISTATEFULFRAME
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//==== OVERLOAD of nsIFrame
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virtual nsIAtom* GetType() const;
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/** handler for attribute changes to mContent */
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NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType);
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nsresult GetText(nsString& aText);
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NS_DECL_QUERYFRAME
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// Temp reference to scriptrunner
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// We could make these auto-Revoking via the "delete" entry for safety
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NS_DECLARE_FRAME_PROPERTY(TextControlInitializer, nsnull)
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public: //for methods who access nsTextControlFrame directly
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void FireOnInput(PRBool aTrusted);
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void SetValueChanged(PRBool aValueChanged);
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/** Called when the frame is focused, to remember the value for onChange. */
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nsresult InitFocusedValue();
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void SetFireChangeEventState(PRBool aNewState)
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{
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mFireChangeEventState = aNewState;
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}
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PRBool GetFireChangeEventState() const
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{
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return mFireChangeEventState;
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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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class ValueSetter {
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public:
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ValueSetter(nsTextControlFrame* aFrame,
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PRBool aHasFocusValue)
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: mFrame(aFrame)
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// This method isn't used for user-generated changes, except for calls
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// from nsFileControlFrame which sets mFireChangeEventState==true and
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// restores it afterwards (ie. we want 'change' events for those changes).
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// Focused value must be updated to prevent incorrect 'change' events,
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// but only if user hasn't changed the value.
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, mFocusValueInit(!mFrame->mFireChangeEventState && aHasFocusValue)
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, mOuterTransaction(false)
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, mInited(false)
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{
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NS_ASSERTION(aFrame, "Should pass a valid frame");
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}
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void Cancel() {
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mInited = PR_FALSE;
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}
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void Init() {
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// Since this code does not handle user-generated changes to the text,
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// make sure we don't fire oninput when the editor notifies us.
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// (mNotifyOnInput must be reset before we return).
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// To protect against a reentrant call to SetValue, we check whether
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// another SetValue is already happening for this frame. If it is,
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// we must wait until we unwind to re-enable oninput events.
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mOuterTransaction = mFrame->mNotifyOnInput;
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if (mOuterTransaction)
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mFrame->mNotifyOnInput = PR_FALSE;
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mInited = PR_TRUE;
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}
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~ValueSetter() {
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if (!mInited)
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return;
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if (mOuterTransaction)
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mFrame->mNotifyOnInput = PR_TRUE;
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if (mFocusValueInit) {
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// Reset mFocusedValue so the onchange event doesn't fire incorrectly.
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mFrame->InitFocusedValue();
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}
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}
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private:
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nsTextControlFrame* mFrame;
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PRPackedBool mFocusValueInit;
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PRPackedBool mOuterTransaction;
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PRPackedBool mInited;
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};
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friend class ValueSetter;
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#define DEFINE_TEXTCTRL_FORWARDER(type, name) \
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type name() { \
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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 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(PRBool, IsSingleLineTextControl)
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DEFINE_TEXTCTRL_CONST_FORWARDER(PRBool, IsTextArea)
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DEFINE_TEXTCTRL_CONST_FORWARDER(PRBool, IsPlainTextControl)
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DEFINE_TEXTCTRL_CONST_FORWARDER(PRBool, IsPasswordTextControl)
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DEFINE_TEXTCTRL_FORWARDER(PRInt32, GetCols)
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DEFINE_TEXTCTRL_FORWARDER(PRInt32, GetWrapCols)
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DEFINE_TEXTCTRL_FORWARDER(PRInt32, GetRows)
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#undef DEFINE_TEXTCTRL_CONST_FORWARDER
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#undef DEFINE_TEXTCTRL_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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class EditorInitializer : public nsRunnable {
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public:
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EditorInitializer(nsTextControlFrame* aFrame) :
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mFrame(aFrame) {}
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NS_IMETHOD Run() {
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if (mFrame) {
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// need to block script to avoid bug 669767
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nsAutoScriptBlocker scriptBlocker;
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nsCOMPtr<nsIPresShell> shell =
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mFrame->PresContext()->GetPresShell();
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PRBool observes = shell->ObservesNativeAnonMutationsForPrint();
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shell->ObserveNativeAnonMutationsForPrint(PR_TRUE);
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// This can cause the frame to be destroyed (and call Revoke()
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mFrame->EnsureEditorInitialized();
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shell->ObserveNativeAnonMutationsForPrint(observes);
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NS_ASSERTION(mFrame,"Frame destroyed even though we had a scriptblocker");
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mFrame->FinishedInitializer();
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}
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return NS_OK;
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}
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// avoids use of nsWeakFrame
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void Revoke() {
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mFrame = nsnull;
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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 nsRunnable {
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public:
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ScrollOnFocusEvent(nsTextControlFrame* aFrame) :
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mFrame(aFrame) {}
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NS_DECL_NSIRUNNABLE
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void Revoke() {
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mFrame = nsnull;
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}
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private:
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nsTextControlFrame* mFrame;
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};
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nsresult DOMPointToOffset(nsIDOMNode* aNode, PRInt32 aNodeOffset, PRInt32 *aResult);
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nsresult OffsetToDOMPoint(PRInt32 aOffset, nsIDOMNode** aResult, PRInt32* aPosition);
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/**
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* Find out whether this control is scrollable (i.e. if it is not a single
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* line text control)
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* @return whether this control is scrollable
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*/
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PRBool IsScrollable() const;
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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(PRBool aNotify,
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PRBool aBeforeEditorInit = PR_FALSE,
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const nsAString *aValue = nsnull);
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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 PR_FALSE if attr not defined
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*/
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PRBool GetMaxLength(PRInt32* 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 PR_FALSE if it does not exist
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*/
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PRBool AttributeExists(nsIAtom *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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nsresult CalcIntrinsicSize(nsRenderingContext* aRenderingContext,
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nsSize& aIntrinsicSize);
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nsresult ScrollSelectionIntoView();
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private:
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//helper methods
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nsresult SetSelectionInternal(nsIDOMNode *aStartNode, PRInt32 aStartOffset,
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nsIDOMNode *aEndNode, PRInt32 aEndOffset,
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SelectionDirection aDirection = eNone);
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nsresult SelectAllOrCollapseToEndOfText(PRBool aSelect);
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nsresult SetSelectionEndPoints(PRInt32 aSelStart, PRInt32 aSelEnd,
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SelectionDirection aDirection = eNone);
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// accessors for the notify on input flag
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PRBool GetNotifyOnInput() const { return mNotifyOnInput; }
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void SetNotifyOnInput(PRBool val) { mNotifyOnInput = val; }
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/**
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* Return the root DOM element, and implicitly initialize the editor if needed.
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*/
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nsresult GetRootNodeAndInitializeEditor(nsIDOMElement **aRootElement);
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void FinishedInitializer() {
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Properties().Delete(TextControlInitializer());
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}
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private:
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// these packed bools could instead use the high order bits on mState, saving 4 bytes
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PRPackedBool mUseEditor;
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PRPackedBool mIsProcessing;
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PRPackedBool mNotifyOnInput;//default this to off to stop any notifications until setup is complete
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// Calls to SetValue will be treated as user values (i.e. trigger onChange
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// eventually) when mFireChangeEventState==true, this is used by nsFileControlFrame.
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PRPackedBool mFireChangeEventState;
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// Keep track if we have asked a placeholder node creation.
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PRPackedBool mUsePlaceholder;
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#ifdef DEBUG
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PRPackedBool mInEditorInitialization;
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friend class EditorInitializerEntryTracker;
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#endif
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nsString mFocusedValue;
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nsRevocableEventPtr<ScrollOnFocusEvent> mScrollEvent;
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};
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#endif
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