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487 lines
20 KiB
C++
487 lines
20 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 nsTextFrame_h___
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#define nsTextFrame_h___
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#include "nsFrame.h"
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#include "nsTextTransformer.h"
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#include "nsITextContent.h"
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struct nsAutoIndexBuffer;
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struct nsAutoPRUint8Buffer;
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class nsTextStyle {
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public:
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const nsStyleFont* mFont;
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const nsStyleText* mText;
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nsIFontMetrics* mNormalFont;
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nsIFontMetrics* mSmallFont;
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nsIFontMetrics* mLastFont;
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PRBool mSmallCaps;
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nscoord mWordSpacing;
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nscoord mLetterSpacing;
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nscoord mSpaceWidth;
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nscoord mAveCharWidth;
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PRBool mJustifying;
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PRBool mPreformatted;
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PRInt32 mNumJustifiableCharacterToRender;
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PRInt32 mNumJustifiableCharacterToMeasure;
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nscoord mExtraSpacePerJustifiableCharacter;
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PRInt32 mNumJustifiableCharacterReceivingExtraJot;
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nsTextStyle(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsStyleContext* sc);
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~nsTextStyle();
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};
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// Contains extra style data needed only for painting (not reflowing)
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class nsTextPaintStyle : public nsTextStyle {
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public:
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enum{
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eNormalSelection =
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nsISelectionController::SELECTION_NORMAL,
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eIMESelections =
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nsISelectionController::SELECTION_IME_RAWINPUT |
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nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT |
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nsISelectionController::SELECTION_IME_CONVERTEDTEXT |
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nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT,
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eAllSelections =
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eNormalSelection | eIMESelections
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};
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const nsStyleColor* mColor;
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nsTextPaintStyle(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsStyleContext* aStyleContext,
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nsIContent* aContent,
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PRInt16 aSelectionStatus);
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~nsTextPaintStyle();
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nscolor GetTextColor();
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void GetSelectionColors(nscolor* aForeColor,
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nscolor* aBackColor,
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PRBool* aBackIsTransparent);
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void GetIMESelectionColors(SelectionType aSelectionType,
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nscolor* aForeColor,
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nscolor* aBackColor,
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PRBool* aBackIsTransparent);
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// if this returns PR_FALSE, we don't need to draw underline.
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PRBool GetIMEUnderline(SelectionType aSelectionType,
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nscolor* aLineColor,
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float* aRelativeSize);
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protected:
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nsPresContext* mPresContext;
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nsStyleContext* mStyleContext;
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nsIContent* mContent;
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PRInt16 mSelectionStatus; // see nsIDocument.h SetDisplaySelection()
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// Common colors
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PRBool mInitCommonColors;
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PRInt32 mSufficientContrast;
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nscolor mFrameBackgroundColor;
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// Selection colors
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PRBool mInitSelectionColors;
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nscolor mSelectionTextColor;
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nscolor mSelectionBGColor;
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PRBool mSelectionBGIsTransparent;
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// IME selection colors and underline info
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struct nsIMEColor {
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PRBool mInit;
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nscolor mTextColor;
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nscolor mBGColor;
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nscolor mBGIsTransparent;
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nscolor mUnderlineColor;
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};
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nsIMEColor mIMEColor[4];
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// indexs
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enum {
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eIndexRawInput = 0,
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eIndexSelRawText,
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eIndexConvText,
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eIndexSelConvText
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};
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float mIMEUnderlineRelativeSize;
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// Color initializations
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PRBool InitCommonColors();
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PRBool InitSelectionColors();
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nsIMEColor* GetIMEColor(SelectionType aSelectionType);
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PRBool InitIMEColors(SelectionType aSelectionType, nsIMEColor*);
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PRBool EnsureSufficientContrast(nscolor *aForeColor, nscolor *aBackColor);
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nscolor GetResolvedForeColor(nscolor aColor, nscolor aDefaultForeColor,
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nscolor aBackColor);
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};
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class nsTextFrame : public nsFrame {
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public:
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nsTextFrame();
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// nsIFrame
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NS_IMETHOD Paint(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags);
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NS_IMETHOD Destroy(nsPresContext* aPresContext);
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NS_IMETHOD GetCursor(const nsPoint& aPoint,
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nsIFrame::Cursor& aCursor);
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NS_IMETHOD CharacterDataChanged(nsPresContext* aPresContext,
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nsIContent* aChild,
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PRBool aAppend);
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virtual nsIFrame* GetNextInFlow() const {
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return mNextInFlow;
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}
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NS_IMETHOD SetNextInFlow(nsIFrame* aNextInFlow) {
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mNextInFlow = aNextInFlow;
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return NS_OK;
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}
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virtual nsIFrame* GetLastInFlow() const;
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NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const {
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aIsSplittable = NS_FRAME_SPLITTABLE;
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return NS_OK;
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}
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/**
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* Get the "type" of the frame
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*
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* @see nsLayoutAtoms::textFrame
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*/
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virtual nsIAtom* GetType() const;
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#ifdef DEBUG
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NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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NS_IMETHOD_(nsFrameState) GetDebugStateBits() const ;
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#endif
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NS_IMETHOD GetPosition(nsPresContext* aPresContext,
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const nsPoint& aPoint,
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nsIContent ** aNewContent,
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PRInt32& aContentOffset,
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PRInt32& aContentOffsetEnd);
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NS_IMETHOD GetContentAndOffsetsFromPoint(nsPresContext* aPresContext,
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const nsPoint& aPoint,
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nsIContent ** aNewContent,
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PRInt32& aContentOffset,
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PRInt32& aContentOffsetEnd,
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PRBool& aBeginFrameContent);
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NS_IMETHOD GetPositionSlowly(nsPresContext* aPresContext,
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nsIRenderingContext * aRendContext,
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const nsPoint& aPoint,
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nsIContent ** aNewContent,
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PRInt32& aOffset);
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NS_IMETHOD SetSelected(nsPresContext* aPresContext,
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nsIDOMRange *aRange,
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PRBool aSelected,
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nsSpread aSpread);
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NS_IMETHOD PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos);
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NS_IMETHOD CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval);
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NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
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nsGUIEvent * aEvent,
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nsEventStatus* aEventStatus);
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NS_IMETHOD GetOffsets(PRInt32 &start, PRInt32 &end)const;
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virtual void AdjustOffsetsForBidi(PRInt32 start, PRInt32 end);
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NS_IMETHOD GetPointFromOffset(nsPresContext* inPresContext,
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nsIRenderingContext* inRendContext,
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PRInt32 inOffset,
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nsPoint* outPoint);
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NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
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PRBool inHint,
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PRInt32* outFrameContentOffset,
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nsIFrame* *outChildFrame);
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NS_IMETHOD IsVisibleForPainting(nsPresContext * aPresContext,
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nsIRenderingContext& aRenderingContext,
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PRBool aCheckVis,
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PRBool* aIsVisible);
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virtual PRBool IsEmpty();
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virtual PRBool IsSelfEmpty() { return IsEmpty(); }
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/**
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* Does this text frame end with a newline character?
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*/
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virtual PRBool HasTerminalNewline() 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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// nsIHTMLReflow
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
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NS_IMETHOD AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace);
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NS_IMETHOD TrimTrailingWhiteSpace(nsPresContext* aPresContext,
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nsIRenderingContext& aRC,
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nscoord& aDeltaWidth,
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PRBool& aLastCharIsJustifiable);
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struct TextReflowData {
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PRInt32 mX; // OUT
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PRInt32 mOffset; // IN/OUT How far along we are in the content
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nscoord mMaxWordWidth; // OUT
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nscoord mAscent; // OUT
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nscoord mDescent; // OUT
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PRPackedBool mWrapping; // IN
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PRPackedBool mSkipWhitespace; // IN
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PRPackedBool mMeasureText; // IN
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PRPackedBool mInWord; // IN
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PRPackedBool mFirstLetterOK; // IN
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PRPackedBool mCanBreakBefore; // IN
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PRPackedBool mComputeMaxWordWidth; // IN
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PRPackedBool mTrailingSpaceTrimmed; // IN/OUT
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TextReflowData(PRInt32 aStartingOffset,
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PRBool aWrapping,
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PRBool aSkipWhitespace,
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PRBool aMeasureText,
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PRBool aInWord,
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PRBool aFirstLetterOK,
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PRBool aCanBreakBefore,
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PRBool aComputeMaxWordWidth,
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PRBool aTrailingSpaceTrimmed)
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: mX(0),
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mOffset(aStartingOffset),
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mMaxWordWidth(0),
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mAscent(0),
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mDescent(0),
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mWrapping(aWrapping),
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mSkipWhitespace(aSkipWhitespace),
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mMeasureText(aMeasureText),
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mInWord(aInWord),
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mFirstLetterOK(aFirstLetterOK),
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mCanBreakBefore(aCanBreakBefore),
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mComputeMaxWordWidth(aComputeMaxWordWidth),
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mTrailingSpaceTrimmed(aTrailingSpaceTrimmed)
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{}
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};
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nsIDocument* GetDocument(nsPresContext* aPresContext);
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void PrepareUnicodeText(nsTextTransformer& aTransformer,
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nsAutoIndexBuffer* aIndexBuffer,
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nsAutoTextBuffer* aTextBuffer,
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PRInt32* aTextLen,
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PRBool aForceArabicShaping = PR_FALSE,
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PRIntn* aJustifiableCharCount = nsnull);
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void ComputeExtraJustificationSpacing(nsIRenderingContext& aRenderingContext,
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nsTextStyle& aTextStyle,
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PRUnichar* aBuffer, PRInt32 aLength, PRInt32 aNumJustifiableCharacter);
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void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
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nsStyleContext* aStyleContext,
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nsPresContext* aPresContext,
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nsTextPaintStyle& aStyle,
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nscoord aX, nscoord aY, nscoord aWidth,
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PRUnichar* aText = nsnull,
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SelectionDetails *aDetails = nsnull,
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PRUint32 aIndex = 0,
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PRUint32 aLength = 0,
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const nscoord* aSpacing = nsnull);
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void PaintTextSlowly(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsStyleContext* aStyleContext,
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nsTextPaintStyle& aStyle,
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nscoord aX, nscoord aY);
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// The passed-in rendering context must have its color set to the color the
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// text should be rendered in.
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void RenderString(nsIRenderingContext& aRenderingContext,
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nsStyleContext* aStyleContext,
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nsPresContext* aPresContext,
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nsTextPaintStyle& aStyle,
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PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
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nscoord aX, nscoord aY,
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nscoord aWidth,
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SelectionDetails *aDetails = nsnull);
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void MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
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nsTextStyle& aStyle,
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PRUnichar* aWord,
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PRInt32 aWordLength,
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PRBool aIsEndOfFrame,
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nsTextDimensions* aDimensionsResult);
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PRUint32 EstimateNumChars(PRUint32 aAvailableWidth,
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PRUint32 aAverageCharWidth);
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nsReflowStatus MeasureText(nsPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsTextTransformer& aTx,
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nsTextStyle& aTs,
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TextReflowData& aTextData);
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void GetTextDimensions(nsIRenderingContext& aRenderingContext,
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nsTextStyle& aStyle,
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PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
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nsTextDimensions* aDimensionsResult);
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//this returns the index into the PAINTBUFFER of the x coord aWidth(based on 0 as far left)
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//also note: this is NOT added to mContentOffset since that would imply that this return is
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//meaningful to content yet. use index buffer from prepareunicodestring to find the content offset.
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PRInt32 GetLengthSlowly(nsIRenderingContext& aRenderingContext,
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nsTextStyle& aStyle,
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PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
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nscoord aWidth);
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PRBool IsTextInSelection(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext);
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nsresult GetTextInfoForPainting(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsIPresShell** aPresShell,
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nsISelectionController** aSelectionController,
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PRBool& aDisplayingSelection,
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PRBool& aIsPaginated,
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PRBool& aIsSelected,
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PRBool& aHideStandardSelection,
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PRInt16& aSelectionValue);
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nsresult GetSelectionStatus(nsPresContext* aPresContext,
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PRInt16& aSelectionValue);
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void PaintUnicodeText(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsStyleContext* aStyleContext,
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nsTextPaintStyle& aStyle,
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nscoord dx, nscoord dy);
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void PaintAsciiText(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsStyleContext* aStyleContext,
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nsTextPaintStyle& aStyle,
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nscoord dx, nscoord dy);
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nsTextDimensions ComputeTotalWordDimensions(nsPresContext* aPresContext,
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nsLineLayout& aLineLayout,
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const nsHTMLReflowState& aReflowState,
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nsIFrame* aNextFrame,
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const nsTextDimensions& aBaseDimensions,
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PRUnichar* aWordBuf,
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PRUint32 aWordBufLen,
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PRUint32 aWordBufSize,
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PRBool aCanBreakBefore);
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nsTextDimensions ComputeWordFragmentDimensions(nsPresContext* aPresContext,
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nsLineLayout& aLineLayout,
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const nsHTMLReflowState& aReflowState,
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nsIFrame* aNextFrame,
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nsIContent* aContent,
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nsITextContent* aText,
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PRBool* aStop,
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const PRUnichar* aWordBuf,
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PRUint32 &aWordBufLen,
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PRUint32 aWordBufSize,
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PRBool aCanBreakBefore);
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#ifdef DEBUG
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void ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const;
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#endif
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protected:
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virtual ~nsTextFrame();
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nsIFrame* mNextInFlow;
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PRInt32 mContentOffset;
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PRInt32 mContentLength;
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PRInt32 mColumn;
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nscoord mAscent;
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//factored out method for GetTextDimensions and getlengthslowly. if aGetTextDimensions is non-zero number then measure to the width field and return the length. else shove total dimensions into result
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PRInt32 GetTextDimensionsOrLength(nsIRenderingContext& aRenderingContext,
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nsTextStyle& aStyle,
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PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
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nsTextDimensions* aDimensionsResult,
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PRBool aGetTextDimensions/* true=get dimensions false = return length up to aDimensionsResult->width size*/);
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nsresult GetContentAndOffsetsForSelection(nsPresContext* aPresContext,nsIContent **aContent, PRInt32 *aOffset, PRInt32 *aLength);
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void AdjustSelectionPointsForBidi(SelectionDetails *sdptr,
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PRInt32 textLength,
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PRBool isRTLChars,
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PRBool isOddLevel,
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PRBool isBidiSystem);
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void SetOffsets(PRInt32 start, PRInt32 end);
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PRBool IsChineseJapaneseLangGroup();
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PRBool IsJustifiableCharacter(PRUnichar aChar, PRBool aLangIsCJ);
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nsresult FillClusterBuffer(nsPresContext *aPresContext, const PRUnichar *aText,
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PRUint32 aLength, nsAutoPRUint8Buffer& aClusterBuffer);
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};
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PRBool
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BinarySearchForPosition(nsIRenderingContext* acx,
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const PRUnichar* aText,
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PRInt32 aBaseWidth,
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PRInt32 aBaseInx,
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PRInt32 aStartInx,
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PRInt32 aEndInx,
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PRInt32 aCursorPos,
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PRInt32& aIndex,
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PRInt32& aTextWidth);
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#endif /* nsTextFrame_h___ */
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