qtextimagehandler.cpp File Reference

#include "qtextimagehandler_p.h"
#include <qapplication.h>
#include <qtextformat.h>
#include <qpainter.h>
#include <qdebug.h>
#include <private/qtextengine_p.h>
#include <qpalette.h>
#include <qtextbrowser.h>
#include <qthread.h>

Go to the source code of this file.

Functions
static QImage	getImage (QTextDocument *doc, const QTextImageFormat &format)
static QSize	getImageSize (QTextDocument *doc, const QTextImageFormat &format)
static QPixmap	getPixmap (QTextDocument *doc, const QTextImageFormat &format)
static QSize	getPixmapSize (QTextDocument *doc, const QTextImageFormat &format)

Function Documentation

getImage()

static QImage getImage ( QTextDocument *  doc, const QTextImageFormat &  format  )

static

Definition at line 136 of file qtextimagehandler.cpp.

Referenced by QTextImageHandler::drawObject(), and getImageSize().

{
    QImage image;

    QString name = format.name();
    if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
        name.prepend(QLatin1String("qrc"));
    QUrl url = QUrl::fromEncoded(name.toUtf8());
    const QVariant data = doc->resource(QTextDocument::ImageResource, url);
    if (data.type() == QVariant::Image) {
        image = qvariant_cast<QImage>(data);
    } else if (data.type() == QVariant::ByteArray) {
        image.loadFromData(data.toByteArray());
    }

    if (image.isNull()) {
        QString context;
#ifndef QT_NO_TEXTBROWSER
        QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());
        if (browser)
            context = browser->source().toString();
#endif
        if (QTextImageHandler::externalLoader)
            image = QTextImageHandler::externalLoader(name, context);

        if (image.isNull()) { // try direct loading
            name = format.name(); // remove qrc:/ prefix again
            if (name.isEmpty() || !image.load(name))
                return QImage(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));
        }
        doc->addResource(QTextDocument::ImageResource, url, image);
    }

    return image;
}

getImageSize()

static QSize getImageSize ( QTextDocument *  doc, const QTextImageFormat &  format  )

static

Definition at line 172 of file qtextimagehandler.cpp.

Referenced by QTextImageHandler::intrinsicSize().

{
    QImage image;

    const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);
    const int width = qRound(format.width());
    const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);
    const int height = qRound(format.height());

    QSize size(width, height);
    if (!hasWidth || !hasHeight) {
        image = getImage(doc, format);
        if (!hasWidth)
            size.setWidth(image.width());
        if (!hasHeight)
            size.setHeight(image.height());
    }

    qreal scale = 1.0;
    QPaintDevice *pdev = doc->documentLayout()->paintDevice();
    if (pdev) {
        if (image.isNull())
            image = getImage(doc, format);
        if (!image.isNull())
            scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());
    }
    size *= scale;

    return size;
}

getPixmap()

static QPixmap getPixmap ( QTextDocument *  doc, const QTextImageFormat &  format  )

static

Definition at line 59 of file qtextimagehandler.cpp.

Referenced by QTextImageHandler::drawObject(), and getPixmapSize().

{
    QPixmap pm;

    QString name = format.name();
    if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
        name.prepend(QLatin1String("qrc"));
    QUrl url = QUrl::fromEncoded(name.toUtf8());
    const QVariant data = doc->resource(QTextDocument::ImageResource, url);
    if (data.type() == QVariant::Pixmap || data.type() == QVariant::Image) {
        pm = qvariant_cast<QPixmap>(data);
    } else if (data.type() == QVariant::ByteArray) {
        pm.loadFromData(data.toByteArray());
    }

    if (pm.isNull()) {
        QString context;
#ifndef QT_NO_TEXTBROWSER
        QTextBrowser *browser = qobject_cast<QTextBrowser *>(doc->parent());
        if (browser)
            context = browser->source().toString();
#endif
        QImage img;
        if (QTextImageHandler::externalLoader)
            img = QTextImageHandler::externalLoader(name, context);

        if (img.isNull()) { // try direct loading
            name = format.name(); // remove qrc:/ prefix again
            if (name.isEmpty() || !img.load(name))
                return QPixmap(QLatin1String(":/trolltech/styles/commonstyle/images/file-16.png"));
        }
        pm = QPixmap::fromImage(img);
        doc->addResource(QTextDocument::ImageResource, url, pm);
    }

    return pm;
}

getPixmapSize()

static QSize getPixmapSize ( QTextDocument *  doc, const QTextImageFormat &  format  )

static

Definition at line 97 of file qtextimagehandler.cpp.

Referenced by QTextImageHandler::intrinsicSize().

{
    QPixmap pm;

    const bool hasWidth = format.hasProperty(QTextFormat::ImageWidth);
    const int width = qRound(format.width());
    const bool hasHeight = format.hasProperty(QTextFormat::ImageHeight);
    const int height = qRound(format.height());

    QSize size(width, height);
    if (!hasWidth || !hasHeight) {
        pm = getPixmap(doc, format);
        if (!hasWidth) {
            if (!hasHeight)
                size.setWidth(pm.width());
            else
                size.setWidth(qRound(height * (pm.width() / (qreal) pm.height())));
        }
        if (!hasHeight) {
            if (!hasWidth)
                size.setHeight(pm.height());
            else
                size.setHeight(qRound(width * (pm.height() / (qreal) pm.width())));
        }
    }

    qreal scale = 1.0;
    QPaintDevice *pdev = doc->documentLayout()->paintDevice();
    if (pdev) {
        if (pm.isNull())
            pm = getPixmap(doc, format);
        if (!pm.isNull())
            scale = qreal(pdev->logicalDpiY()) / qreal(qt_defaultDpi());
    }
    size *= scale;

    return size;
}