зеркало из https://github.com/mozilla/gecko-dev.git
318 строки
11 KiB
C++
318 строки
11 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 "nsAreaFrame.h"
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#include "nsIFormControlFrame.h"
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#include "nsIDOMMouseListener.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsIEditor.h"
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#include "nsITextControlFrame.h"
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#include "nsIFontMetrics.h"
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#include "nsWeakReference.h" //for service and presshell pointers
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#include "nsIScrollableViewProvider.h"
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#include "nsIPhonetic.h"
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#include "nsContentUtils.h"
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#include "nsDisplayList.h"
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class nsIEditor;
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class nsISelectionController;
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class nsTextInputSelectionImpl;
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class nsTextInputListener;
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class nsIDOMCharacterData;
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class nsIScrollableView;
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#ifdef ACCESSIBILITY
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class nsIAccessible;
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#endif
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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 nsIScrollableViewProvider,
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public nsIPhonetic
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{
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public:
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nsTextControlFrame(nsIPresShell* aShell, nsStyleContext* aContext);
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virtual ~nsTextControlFrame();
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virtual void RemovedAsPrimaryFrame();
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virtual void Destroy();
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virtual nscoord GetMinWidth(nsIRenderingContext* aRenderingContext);
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virtual nsSize ComputeAutoSize(nsIRenderingContext *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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NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
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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<nsIContent*>& aElements);
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virtual nsIFrame* CreateFrameFor(nsIContent* aContent);
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virtual void PostCreateFrames();
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// Utility methods to set current widget state
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// Be careful when using this method.
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// Calling it may cause |this| to be deleted.
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// In that case the method returns an error value.
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nsresult SetValue(const nsAString& aValue);
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NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
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nsIFrame* 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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//==== NSIGFXTEXTCONTROLFRAME2
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NS_IMETHOD GetEditor(nsIEditor **aEditor);
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NS_IMETHOD OwnsValue(PRBool* aOwnsValue);
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NS_IMETHOD GetValue(nsAString& aValue, PRBool aIgnoreWrap) const;
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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, PRInt32 aSelectionEnd);
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NS_IMETHOD GetSelectionRange(PRInt32* aSelectionStart, PRInt32* aSelectionEnd);
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virtual nsISelectionController* GetOwnedSelectionController()
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{ return mSelCon; }
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virtual nsFrameSelection* GetOwnedFrameSelection()
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{ return mFrameSel; }
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// nsIPhonetic
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NS_DECL_NSIPHONETIC
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//==== END NSIGFXTEXTCONTROLFRAME2
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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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NS_IMETHOD GetText(nsString* aText);
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NS_DECL_ISUPPORTS_INHERITED
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public: //for methods who access nsTextControlFrame directly
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/**
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* Find out whether this is a single line text control. (text or password)
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* @return whether this is a single line text control
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*/
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PRBool IsSingleLineTextControl() const;
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/**
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* Find out whether this control is a textarea.
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* @return whether this is a textarea text control
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*/
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PRBool IsTextArea() const;
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/**
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* Find out whether this control edits plain text. (Currently always true.)
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* @return whether this is a plain text control
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*/
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PRBool IsPlainTextControl() const;
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/**
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* Find out whether this is a password control (input type=password)
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* @return whether this is a password ontrol
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*/
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PRBool IsPasswordTextControl() const;
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void FireOnInput();
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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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nsresult DOMPointToOffset(nsIDOMNode* aNode, PRInt32 aNodeOffset, PRInt32 *aResult);
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nsresult OffsetToDOMPoint(PRInt32 aOffset, nsIDOMNode** aResult, PRInt32* aPosition);
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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 to free up native keybinding services */
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static NS_HIDDEN_(void) ShutDown();
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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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protected:
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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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* Initialize mEditor 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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nsresult InitEditor();
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/**
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* Strip all \n, \r and nulls from the given string
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* @param aString the string to remove newlines from [in/out]
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*/
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void RemoveNewlines(nsString &aString);
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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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/**
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* Fire the onChange event.
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*/
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// Helper methods
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/**
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* Get the cols attribute (if textarea) or a default
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* @return the number of columns to use
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*/
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PRInt32 GetCols();
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/**
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* Get the rows attribute (if textarea) or a default
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* @return the number of rows to use
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*/
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PRInt32 GetRows();
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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(nsIRenderingContext* aRenderingContext,
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nsSize& aIntrinsicSize);
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// nsIScrollableViewProvider
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virtual nsIScrollableView* GetScrollableView();
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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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nsresult SelectAllContents();
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nsresult SetSelectionEndPoints(PRInt32 aSelStart, PRInt32 aSelEnd);
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private:
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nsCOMPtr<nsIContent> mAnonymousDiv;
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nsCOMPtr<nsIEditor> mEditor;
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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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PRPackedBool mDidPreDestroy; // has PreDestroy been called
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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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PRPackedBool mInSecureKeyboardInputMode;
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nsCOMPtr<nsISelectionController> mSelCon;
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nsCOMPtr<nsFrameSelection> mFrameSel;
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nsTextInputListener* mTextListener;
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nsString mFocusedValue;
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#ifdef DEBUG
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PRBool mCreateFrameForCalled;
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#endif
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};
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#endif
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