/*
* 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(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());
}