1 /****************************************************************************
3 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the QtGui module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** GNU Lesser General Public License Usage
11 ** This file may be used under the terms of the GNU Lesser General Public
12 ** License version 2.1 as published by the Free Software Foundation and
13 ** appearing in the file LICENSE.LGPL included in the packaging of this
14 ** file. Please review the following information to ensure the GNU Lesser
15 ** General Public License version 2.1 requirements will be met:
16 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
18 ** In addition, as a special exception, Nokia gives you certain additional
19 ** rights. These rights are described in the Nokia Qt LGPL Exception
20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
22 ** GNU General Public License Usage
23 ** Alternatively, this file may be used under the terms of the GNU General
24 ** Public License version 3.0 as published by the Free Software Foundation
25 ** and appearing in the file LICENSE.GPL included in the packaging of this
26 ** file. Please review the following information to ensure the GNU General
27 ** Public License version 3.0 requirements will be met:
28 ** http://www.gnu.org/copyleft/gpl.html.
31 ** Alternatively, this file may be used in accordance with the terms and
32 ** conditions contained in a signed written agreement between you and Nokia.
40 ****************************************************************************/
43 #include "qtextimagehandler_p.h"
45 #include <qapplication.h>
46 #include <qtextformat.h>
49 #include <private/qtextengine_p.h>
51 #include <qtextbrowser.h>
56 // set by the mime source factory in Qt3Compat
57 QTextImageHandler::ExternalImageLoaderFunction QTextImageHandler::externalLoader = 0;
59 static QPixmap getPixmap(QTextDocument *doc, const QTextImageFormat &format)
63 QString name = format.name();
64 if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
65 name.prepend(QLatin1String("qrc"));
66 QUrl url = QUrl::fromEncoded(name.toUtf8());
67 const QVariant data = doc->resource(QTextDocument::ImageResource, url);
68 if (data.type() == QVariant::Pixmap || data.type() == QVariant::Image) {
69 pm = qvariant_cast<QPixmap>(data);
70 } else if (data.type() == QVariant::ByteArray) {
71 pm.loadFromData(data.toByteArray());
76 #ifndef QT_NO_TEXTBROWSER
77 QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());
79 context = browser->source().toString();
82 if (QTextImageHandler::externalLoader)
83 img = QTextImageHandler::externalLoader(name, context);
85 if (img.isNull()) { // try direct loading
86 name = format.name(); // remove qrc:/ prefix again
87 if (name.isEmpty() || !img.load(name))
88 return QPixmap(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));
90 pm = QPixmap::fromImage(img);
91 doc->addResource(QTextDocument::ImageResource, url, pm);
97 static QSize getPixmapSize(QTextDocument *doc, const QTextImageFormat &format)
101 const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);
102 const int width = qRound(format.width());
103 const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);
104 const int height = qRound(format.height());
106 QSize size(width, height);
107 if (!hasWidth || !hasHeight) {
108 pm = getPixmap(doc, format);
111 size.setWidth(pm.width());
113 size.setWidth(qRound(height * (pm.width() / (qreal) pm.height())));
117 size.setHeight(pm.height());
119 size.setHeight(qRound(width * (pm.height() / (qreal) pm.width())));
124 QPaintDevice *pdev = doc->documentLayout()->paintDevice();
127 pm = getPixmap(doc, format);
129 scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());
136 static QImage getImage(QTextDocument *doc, const QTextImageFormat &format)
140 QString name = format.name();
141 if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
142 name.prepend(QLatin1String("qrc"));
143 QUrl url = QUrl::fromEncoded(name.toUtf8());
144 const QVariant data = doc->resource(QTextDocument::ImageResource, url);
145 if (data.type() == QVariant::Image) {
146 image = qvariant_cast<QImage>(data);
147 } else if (data.type() == QVariant::ByteArray) {
148 image.loadFromData(data.toByteArray());
151 if (image.isNull()) {
153 #ifndef QT_NO_TEXTBROWSER
154 QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());
156 context = browser->source().toString();
158 if (QTextImageHandler::externalLoader)
159 image = QTextImageHandler::externalLoader(name, context);
161 if (image.isNull()) { // try direct loading
162 name = format.name(); // remove qrc:/ prefix again
163 if (name.isEmpty() || !image.load(name))
164 return QImage(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));
166 doc->addResource(QTextDocument::ImageResource, url, image);
172 static QSize getImageSize(QTextDocument *doc, const QTextImageFormat &format)
176 const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);
177 const int width = qRound(format.width());
178 const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);
179 const int height = qRound(format.height());
181 QSize size(width, height);
182 if (!hasWidth || !hasHeight) {
183 image = getImage(doc, format);
185 size.setWidth(image.width());
187 size.setHeight(image.height());
191 QPaintDevice *pdev = doc->documentLayout()->paintDevice();
194 image = getImage(doc, format);
196 scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());
203 QTextImageHandler::QTextImageHandler(QObject *parent)
208 QSizeF QTextImageHandler::intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format)
210 Q_UNUSED(posInDocument)
211 const QTextImageFormat imageFormat = format.toImageFormat();
213 if (qApp->thread() != QThread::currentThread())
214 return getImageSize(doc, imageFormat);
215 return getPixmapSize(doc, imageFormat);
218 void QTextImageHandler::drawObject(QPainter *p, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format)
220 Q_UNUSED(posInDocument)
221 const QTextImageFormat imageFormat = format.toImageFormat();
223 if (qApp->thread() != QThread::currentThread()) {
224 const QImage image = getImage(doc, imageFormat);
225 p->drawImage(rect, image, image.rect());
227 const QPixmap pixmap = getPixmap(doc, imageFormat);
228 p->drawPixmap(rect, pixmap, pixmap.rect());