WebCore/kwq/KWQFontMetrics.mm - WebKit - Git at Google

 /*
  * Copyright (C) 2004 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #import "KWQFontMetrics.h"

 #import <Cocoa/Cocoa.h>

 #import "KWQFont.h"
 #import "KWQLogging.h"
 #import "KWQFoundationExtras.h"

 #import "WebCoreTextRenderer.h"
 #import "WebCoreTextRendererFactory.h"

 // We know that none of the ObjC calls here will raise exceptions
 // because they are all calls to WebCoreTextRenderer, which has a
 // contract of not raising.

 struct QFontMetricsPrivate
 {
     QFontMetricsPrivate(const QFont &font)
         : refCount(0), _font(font), _renderer(nil)
     {
     }
     ~QFontMetricsPrivate()
     {
         KWQRelease(_renderer);
     }
     id <WebCoreTextRenderer> getRenderer()
     {
         if (!_renderer) {
             _renderer = KWQRetain([[WebCoreTextRendererFactory sharedFactory]
                 rendererWithFont:_font.getNSFont()
                 usingPrinterFont:_font.isPrinterFont()]);
         }
         return _renderer;
     }

     const QFont &font() const { return _font; }
     void setFont(const QFont &font)
     {
         if (_font == font) {
             return;
         }
         _font = font;
         KWQRelease(_renderer);
         _renderer = nil;
     }

     int refCount;

 private:
     QFont _font;
     id <WebCoreTextRenderer> _renderer;

     QFontMetricsPrivate(const QFontMetricsPrivate&);
     QFontMetricsPrivate& operator=(const QFontMetricsPrivate&);
 };

 QFontMetrics::QFontMetrics()
 {
 }

 QFontMetrics::QFontMetrics(const QFont &font)
     : data(new QFontMetricsPrivate(font))
 {
 }

 QFontMetrics::QFontMetrics(const QFontMetrics &other)
     : data(other.data)
 {
 }

 QFontMetrics::~QFontMetrics()
 {
 }

 QFontMetrics &QFontMetrics::operator=(const QFontMetrics &other)
 {
     data = other.data;
     return *this;
 }

 void QFontMetrics::setFont(const QFont &font)
 {
     if (data.isNull()) {
         data = KWQRefPtr<QFontMetricsPrivate>(new QFontMetricsPrivate(font));
     } else {
         data->setFont(font);
     }
 }

 int QFontMetrics::ascent() const
 {
     if (data.isNull()) {
         ERROR("called ascent on an empty QFontMetrics");
         return 0;
     }

     return [data->getRenderer() ascent];
 }

 int QFontMetrics::descent() const
 {
     if (data.isNull()) {
         ERROR("called descent on an empty QFontMetrics");
         return 0;
     }

     return [data->getRenderer() descent];
 }

 int QFontMetrics::height() const
 {
     // According to Qt documentation:
     // "This is always equal to ascent()+descent()+1 (the 1 is for the base line)."
     // We DO NOT match the Qt behavior here.  This is intentional.
     return ascent() + descent();
 }

 int QFontMetrics::lineSpacing() const
 {
     if (data.isNull()) {
         ERROR("called lineSpacing on an empty QFontMetrics");
         return 0;
     }
     return [data->getRenderer() lineSpacing];
 }

 float QFontMetrics::xHeight() const
 {
     if (data.isNull()) {
         ERROR("called xHeight on an empty QFontMetrics");
         return 0;
     }
     return [data->getRenderer() xHeight];
 }

 int QFontMetrics::width(QChar qc, int tabWidth, int xpos) const
 {
     if (data.isNull()) {
         ERROR("called width on an empty QFontMetrics");
         return 0;
     }

     UniChar c = qc.unicode();

     CREATE_FAMILY_ARRAY(data->font(), families);

     WebCoreTextRun run;
     WebCoreInitializeTextRun(&run, &c, 1, 0, 1);

     WebCoreTextStyle style;
     WebCoreInitializeEmptyTextStyle(&style);
     style.families = families;
     style.tabWidth = tabWidth;
     style.xpos = xpos;

     return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
 }

 int QFontMetrics::charWidth(const QString &s, int pos, int tabWidth, int xpos) const
 {
     return width(s[pos], tabWidth, xpos);
 }

 int QFontMetrics::width(char c, int tabWidth, int xpos) const
 {
     if (data.isNull()) {
         ERROR("called width on an empty QFontMetrics");
         return 0;
     }

     UniChar ch = (uchar) c;

     CREATE_FAMILY_ARRAY(data->font(), families);

     WebCoreTextRun run;
     WebCoreInitializeTextRun(&run, &ch, 1, 0, 1);

     WebCoreTextStyle style;
     WebCoreInitializeEmptyTextStyle(&style);
     style.families = families;
     style.tabWidth = tabWidth;
     style.xpos = xpos;

     return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
 }

 int QFontMetrics::width(const QString &qstring, int tabWidth, int xpos, int len) const
 {
     if (data.isNull()) {
         ERROR("called width on an empty QFontMetrics");
         return 0;
     }

     CREATE_FAMILY_ARRAY(data->font(), families);

     int length = len == -1 ? qstring.length() : len;

     WebCoreTextRun run;
     WebCoreInitializeTextRun(&run, (const UniChar *)qstring.unicode(), length, 0, length);

     WebCoreTextStyle style;
     WebCoreInitializeEmptyTextStyle(&style);
     style.families = families;
     style.tabWidth = tabWidth;
     style.xpos = xpos;

     return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
 }

 int QFontMetrics::width(const QChar *uchars, int len, int tabWidth, int xpos) const
 {
     if (data.isNull()) {
         ERROR("called width on an empty QFontMetrics");
         return 0;
     }

     CREATE_FAMILY_ARRAY(data->font(), families);

     WebCoreTextRun run;
     WebCoreInitializeTextRun(&run, (const UniChar *)uchars, len, 0, len);

     WebCoreTextStyle style;
     WebCoreInitializeEmptyTextStyle(&style);
     style.families = families;
     style.tabWidth = tabWidth;
     style.xpos = xpos;

     return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
 }

 float QFontMetrics::floatWidth(const QChar *uchars, int slen, int pos, int len,
                                int tabWidth, int xpos, int letterSpacing, int wordSpacing, bool smallCaps) const
 {
     if (data.isNull()) {
         ERROR("called floatWidth on an empty QFontMetrics");
         return 0;
     }

     CREATE_FAMILY_ARRAY(data->font(), families);
     WebCoreTextRun run;
     WebCoreInitializeTextRun(&run, (const UniChar *)uchars, slen, pos, pos+len);

     WebCoreTextStyle style;
     WebCoreInitializeEmptyTextStyle(&style);
     style.tabWidth = tabWidth;
     style.xpos = xpos;
     style.letterSpacing = letterSpacing;
     style.wordSpacing = wordSpacing;
     style.smallCaps = smallCaps;
     style.families = families;

     return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
 }

 float QFontMetrics::floatCharacterWidths(const QChar *uchars, int slen, int pos, int len, int toAdd, int tabWidth, int xpos, float *buffer, int letterSpacing, int wordSpacing, bool smallCaps) const
 {
     if (data.isNull()) {
         ERROR("called floatCharacterWidths on an empty QFontMetrics");
         return 0;
     }

     CREATE_FAMILY_ARRAY(data->font(), families);

     WebCoreTextRun run;
     WebCoreInitializeTextRun(&run, (const UniChar *)uchars, slen, pos, pos+len);

     WebCoreTextStyle style;
     WebCoreInitializeEmptyTextStyle(&style);
     style.letterSpacing = letterSpacing;
     style.wordSpacing = wordSpacing;
     style.smallCaps = smallCaps;
     style.padding = toAdd;
     style.tabWidth = tabWidth;
     style.xpos = xpos;
     style.families = families;

     return [data->getRenderer() floatWidthForRun:&run style:&style widths:buffer];
 }

 int QFontMetrics::checkSelectionPoint (QChar *s, int slen, int pos, int len, int toAdd, int tabWidth, int xpos, int letterSpacing, int wordSpacing, bool smallCaps, int x, bool reversed, bool includePartialGlyphs) const
 {
     if (data.isNull()) {
         ERROR("called checkSelectionPoint on an empty QFontMetrics");
         return 0;
     }

     CREATE_FAMILY_ARRAY(data->font(), families);
     WebCoreTextRun run;
     WebCoreInitializeTextRun(&run, (const UniChar *)s, slen, pos, pos+len);

     WebCoreTextStyle style;
     WebCoreInitializeEmptyTextStyle(&style);
     style.letterSpacing = letterSpacing;
     style.wordSpacing = wordSpacing;
     style.smallCaps = smallCaps;
     style.families = families;
     style.padding = toAdd;
     style.tabWidth = tabWidth;
     style.xpos = xpos;
     style.rtl = reversed;

     return [data->getRenderer() pointToOffset:&run style:&style position:x reversed:reversed includePartialGlyphs:includePartialGlyphs];
 }

 QRect QFontMetrics::boundingRect(QChar c) const
 {
     return QRect(0, 0, width(c, 0, 0), height());
 }

 QRect QFontMetrics::boundingRect(const QString &qstring, int tabWidth, int xpos, int len) const
 {
     return QRect(0, 0, width(qstring, tabWidth, xpos, len), height());
 }

 QRect QFontMetrics::boundingRect(int x, int y, int width, int height, int flags, const QString &str, int tabWidth, int xpos) const
 {
     // FIXME: need to support word wrapping?
     return QRect(x, y, width, height).intersect(boundingRect(str, tabWidth, xpos));
 }

 QSize QFontMetrics::size(int, const QString &qstring, int tabWidth, int xpos) const
 {
     return QSize(width(qstring, tabWidth, xpos), height());
 }
	/*
	* Copyright (C) 2004 Apple Computer, Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#import "KWQFontMetrics.h"

	#import <Cocoa/Cocoa.h>

	#import "KWQFont.h"
	#import "KWQLogging.h"
	#import "KWQFoundationExtras.h"

	#import "WebCoreTextRenderer.h"
	#import "WebCoreTextRendererFactory.h"

	// We know that none of the ObjC calls here will raise exceptions
	// because they are all calls to WebCoreTextRenderer, which has a
	// contract of not raising.

	struct QFontMetricsPrivate
	{
	QFontMetricsPrivate(const QFont &font)
	: refCount(0), _font(font), _renderer(nil)
	{
	}
	~QFontMetricsPrivate()
	{
	KWQRelease(_renderer);
	}
	id <WebCoreTextRenderer> getRenderer()
	{
	if (!_renderer) {
	_renderer = KWQRetain([[WebCoreTextRendererFactory sharedFactory]
	rendererWithFont:_font.getNSFont()
	usingPrinterFont:_font.isPrinterFont()]);
	}
	return _renderer;
	}

	const QFont &font() const { return _font; }
	void setFont(const QFont &font)
	{
	if (_font == font) {
	return;
	}
	_font = font;
	KWQRelease(_renderer);
	_renderer = nil;
	}

	int refCount;

	private:
	QFont _font;
	id <WebCoreTextRenderer> _renderer;

	QFontMetricsPrivate(const QFontMetricsPrivate&);
	QFontMetricsPrivate& operator=(const QFontMetricsPrivate&);
	};

	QFontMetrics::QFontMetrics()
	{
	}

	QFontMetrics::QFontMetrics(const QFont &font)
	: data(new QFontMetricsPrivate(font))
	{
	}

	QFontMetrics::QFontMetrics(const QFontMetrics &other)
	: data(other.data)
	{
	}

	QFontMetrics::~QFontMetrics()
	{
	}

	QFontMetrics &QFontMetrics::operator=(const QFontMetrics &other)
	{
	data = other.data;
	return *this;
	}

	void QFontMetrics::setFont(const QFont &font)
	{
	if (data.isNull()) {
	data = KWQRefPtr<QFontMetricsPrivate>(new QFontMetricsPrivate(font));
	} else {
	data->setFont(font);
	}
	}

	int QFontMetrics::ascent() const
	{
	if (data.isNull()) {
	ERROR("called ascent on an empty QFontMetrics");
	return 0;
	}

	return [data->getRenderer() ascent];
	}

	int QFontMetrics::descent() const
	{
	if (data.isNull()) {
	ERROR("called descent on an empty QFontMetrics");
	return 0;
	}

	return [data->getRenderer() descent];
	}

	int QFontMetrics::height() const
	{
	// According to Qt documentation:
	// "This is always equal to ascent()+descent()+1 (the 1 is for the base line)."
	// We DO NOT match the Qt behavior here. This is intentional.
	return ascent() + descent();
	}

	int QFontMetrics::lineSpacing() const
	{
	if (data.isNull()) {
	ERROR("called lineSpacing on an empty QFontMetrics");
	return 0;
	}
	return [data->getRenderer() lineSpacing];
	}

	float QFontMetrics::xHeight() const
	{
	if (data.isNull()) {
	ERROR("called xHeight on an empty QFontMetrics");
	return 0;
	}
	return [data->getRenderer() xHeight];
	}

	int QFontMetrics::width(QChar qc, int tabWidth, int xpos) const
	{
	if (data.isNull()) {
	ERROR("called width on an empty QFontMetrics");
	return 0;
	}

	UniChar c = qc.unicode();

	CREATE_FAMILY_ARRAY(data->font(), families);

	WebCoreTextRun run;
	WebCoreInitializeTextRun(&run, &c, 1, 0, 1);

	WebCoreTextStyle style;
	WebCoreInitializeEmptyTextStyle(&style);
	style.families = families;
	style.tabWidth = tabWidth;
	style.xpos = xpos;

	return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
	}

	int QFontMetrics::charWidth(const QString &s, int pos, int tabWidth, int xpos) const
	{
	return width(s[pos], tabWidth, xpos);
	}

	int QFontMetrics::width(char c, int tabWidth, int xpos) const
	{
	if (data.isNull()) {
	ERROR("called width on an empty QFontMetrics");
	return 0;
	}

	UniChar ch = (uchar) c;

	CREATE_FAMILY_ARRAY(data->font(), families);

	WebCoreTextRun run;
	WebCoreInitializeTextRun(&run, &ch, 1, 0, 1);

	WebCoreTextStyle style;
	WebCoreInitializeEmptyTextStyle(&style);
	style.families = families;
	style.tabWidth = tabWidth;
	style.xpos = xpos;

	return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
	}

	int QFontMetrics::width(const QString &qstring, int tabWidth, int xpos, int len) const
	{
	if (data.isNull()) {
	ERROR("called width on an empty QFontMetrics");
	return 0;
	}

	CREATE_FAMILY_ARRAY(data->font(), families);

	int length = len == -1 ? qstring.length() : len;

	WebCoreTextRun run;
	WebCoreInitializeTextRun(&run, (const UniChar *)qstring.unicode(), length, 0, length);

	WebCoreTextStyle style;
	WebCoreInitializeEmptyTextStyle(&style);
	style.families = families;
	style.tabWidth = tabWidth;
	style.xpos = xpos;

	return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
	}

	int QFontMetrics::width(const QChar *uchars, int len, int tabWidth, int xpos) const
	{
	if (data.isNull()) {
	ERROR("called width on an empty QFontMetrics");
	return 0;
	}

	CREATE_FAMILY_ARRAY(data->font(), families);

	WebCoreTextRun run;
	WebCoreInitializeTextRun(&run, (const UniChar *)uchars, len, 0, len);

	WebCoreTextStyle style;
	WebCoreInitializeEmptyTextStyle(&style);
	style.families = families;
	style.tabWidth = tabWidth;
	style.xpos = xpos;

	return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
	}

	float QFontMetrics::floatWidth(const QChar *uchars, int slen, int pos, int len,
	int tabWidth, int xpos, int letterSpacing, int wordSpacing, bool smallCaps) const
	{
	if (data.isNull()) {
	ERROR("called floatWidth on an empty QFontMetrics");
	return 0;
	}

	CREATE_FAMILY_ARRAY(data->font(), families);
	WebCoreTextRun run;
	WebCoreInitializeTextRun(&run, (const UniChar *)uchars, slen, pos, pos+len);

	WebCoreTextStyle style;
	WebCoreInitializeEmptyTextStyle(&style);
	style.tabWidth = tabWidth;
	style.xpos = xpos;
	style.letterSpacing = letterSpacing;
	style.wordSpacing = wordSpacing;
	style.smallCaps = smallCaps;
	style.families = families;

	return ROUND_TO_INT([data->getRenderer() floatWidthForRun:&run style:&style widths:0]);
	}

	float QFontMetrics::floatCharacterWidths(const QChar uchars, int slen, int pos, int len, int toAdd, int tabWidth, int xpos, float buffer, int letterSpacing, int wordSpacing, bool smallCaps) const
	{
	if (data.isNull()) {
	ERROR("called floatCharacterWidths on an empty QFontMetrics");
	return 0;
	}

	CREATE_FAMILY_ARRAY(data->font(), families);

	WebCoreTextRun run;
	WebCoreInitializeTextRun(&run, (const UniChar *)uchars, slen, pos, pos+len);

	WebCoreTextStyle style;
	WebCoreInitializeEmptyTextStyle(&style);
	style.letterSpacing = letterSpacing;
	style.wordSpacing = wordSpacing;
	style.smallCaps = smallCaps;
	style.padding = toAdd;
	style.tabWidth = tabWidth;
	style.xpos = xpos;
	style.families = families;

	return [data->getRenderer() floatWidthForRun:&run style:&style widths:buffer];
	}

	int QFontMetrics::checkSelectionPoint (QChar *s, int slen, int pos, int len, int toAdd, int tabWidth, int xpos, int letterSpacing, int wordSpacing, bool smallCaps, int x, bool reversed, bool includePartialGlyphs) const
	{
	if (data.isNull()) {
	ERROR("called checkSelectionPoint on an empty QFontMetrics");
	return 0;
	}

	CREATE_FAMILY_ARRAY(data->font(), families);
	WebCoreTextRun run;
	WebCoreInitializeTextRun(&run, (const UniChar *)s, slen, pos, pos+len);

	WebCoreTextStyle style;
	WebCoreInitializeEmptyTextStyle(&style);
	style.letterSpacing = letterSpacing;
	style.wordSpacing = wordSpacing;
	style.smallCaps = smallCaps;
	style.families = families;
	style.padding = toAdd;
	style.tabWidth = tabWidth;
	style.xpos = xpos;
	style.rtl = reversed;

	return [data->getRenderer() pointToOffset:&run style:&style position:x reversed:reversed includePartialGlyphs:includePartialGlyphs];
	}

	QRect QFontMetrics::boundingRect(QChar c) const
	{
	return QRect(0, 0, width(c, 0, 0), height());
	}

	QRect QFontMetrics::boundingRect(const QString &qstring, int tabWidth, int xpos, int len) const
	{
	return QRect(0, 0, width(qstring, tabWidth, xpos, len), height());
	}

	QRect QFontMetrics::boundingRect(int x, int y, int width, int height, int flags, const QString &str, int tabWidth, int xpos) const
	{
	// FIXME: need to support word wrapping?
	return QRect(x, y, width, height).intersect(boundingRect(str, tabWidth, xpos));
	}

	QSize QFontMetrics::size(int, const QString &qstring, int tabWidth, int xpos) const
	{
	return QSize(width(qstring, tabWidth, xpos), height());
	}