159 lines
4.4 KiB
C++
159 lines
4.4 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla MathML Project.
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*
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* The Initial Developer of the Original Code is The University Of
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* Queensland. Portions created by The University Of Queensland are
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* Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
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*
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* Contributor(s):
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* Roger B. Sidje <rbs@maths.uq.edu.au>
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*/
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#ifndef nsMathMLChar_h___
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#define nsMathMLChar_h___
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#include "nsMathMLOperators.h"
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#include "nsIMathMLFrame.h"
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// enum of chars that we know something about
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enum nsMathMLCharEnum {
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eMathMLChar_DONT_STRETCH = -1,
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#define MATHML_CHAR(_name, _value, _direction) eMathMLChar_##_name,
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#include "nsMathMLCharList.h"
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#undef MATHML_CHAR
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eMathMLChar_COUNT
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};
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// class used to handle stretchy symbols (accent and boundary symbol)
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class nsMathMLChar
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{
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public:
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// constructor and destructor
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nsMathMLChar()
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{
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}
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virtual ~nsMathMLChar()
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{
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}
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NS_IMETHOD
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Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsIStyleContext* aStyleContext);
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// This is the method called to ask the char to stretch itself.
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// aDesiredStretchSize is an IN/OUT parameter.
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// On input - it contains our current size.
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// On output - the same size or the new size that the char wants.
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NS_IMETHOD
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Stretch(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsIStyleContext* aStyleContext,
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nsStretchDirection aStretchDirection,
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nsStretchMetrics& aContainerSize,
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nsStretchMetrics& aDesiredStretchSize);
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// If you call SetData(), it will lookup the enum of the data
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// and set mEnum for you. If the data is an arbitrary string for
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// which no enum is defined, mEnum is set to eMathMLChar_DONT_STRETCH
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// and the data is interpreted as a normal string.
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void
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SetData(nsString& aData);
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void
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GetData(nsString& aData) {
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aData = mData;
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}
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// If you call SetEnum(), it will lookup the actual value of the data and
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// set it for you. All the enums listed above have their corresponding data.
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void
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SetEnum(nsMathMLCharEnum aEnum);
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nsMathMLCharEnum
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Enum() {
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return mEnum;
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}
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PRInt32
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Length() {
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return mData.Length();
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}
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nsStretchDirection
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GetStretchDirection() {
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return mDirection;
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}
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// Sometimes we only want to pass the data to another routine,
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// this function helps to avoid copying
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const PRUnichar*
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GetUnicode() {
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return mData.GetUnicode();
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}
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void
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GetRect(nsRect& aRect) {
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aRect = mRect;
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}
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void
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SetRect(const nsRect& aRect) {
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mRect = aRect;
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}
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void
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GetBoundingMetrics(nsBoundingMetrics& aBoundingMetrics) {
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aBoundingMetrics = mBoundingMetrics;
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}
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private:
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nsString mData;
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PRUnichar mGlyph;
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nsRect mRect;
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nsStretchDirection mDirection;
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nsMathMLCharEnum mEnum;
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nsBoundingMetrics mBoundingMetrics;
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// helper methods
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static void
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DrawGlyph(nsIRenderingContext& aRenderingContext,
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PRUnichar aChar,
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nscoord aX,
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nscoord aY,
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nsRect& aClipRect);
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static nsresult
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PaintVertically(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsIStyleContext* aStyleContext,
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nscoord fontAscent,
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nscoord fontDescent,
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nsMathMLCharEnum aCharEnum,
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nsRect aRect);
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static nsresult
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PaintHorizontally(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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nsIStyleContext* aStyleContext,
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nscoord fontAscent,
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nscoord fontDescent,
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nsMathMLCharEnum aCharEnum,
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nsRect aRect);
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};
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#endif /* nsMathMLChar_h___ */
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