TextIconFormat

source/fb2icon.cpp

@@ -0,0 +1,79 @@
+#include <QApplication>
+#include <QTextDocument>
+#include <QTextCharFormat>
+#include <QVariant>
+
+static const int IconFormatType = 0x1000;
+
+//----------------------------------------------------------------------------
+// TextIconFormat
+//----------------------------------------------------------------------------
+
+class TextIconFormat : public QTextCharFormat
+{
+public:
+    static void TextIconFormat::insert(QTextCursor &cursor, const QString &name, const QString &text);
+
+    TextIconFormat(const QString &iconName, const QString &text);
+
+    enum Property {
+            IconName = QTextFormat::UserProperty + 1,
+            IconText = QTextFormat::UserProperty + 2
+    };
+};
+
+TextIconFormat::TextIconFormat(const QString &iconName, const QString &text)
+{
+    setObjectType(IconFormatType);
+    QTextFormat::setProperty(IconName, iconName);
+    QTextFormat::setProperty(IconText, text);
+}
+
+void TextIconFormat::insertIcon(QTextCursor &cursor, const QString &name, const QString &text)
+{
+    QTextCharFormat format = cursor.charFormat();
+    TextIconFormat icon(iconName, iconText);
+    cursor.insertText(QString(QChar::ObjectReplacementCharacter), icon);
+    cursor.setCharFormat(format);
+}
+
+//----------------------------------------------------------------------------
+// IconTextObjectInterface
+//----------------------------------------------------------------------------
+
+class TextIconHandler : public QObject, public QTextObjectInterface
+{
+    Q_OBJECT
+    Q_INTERFACES(QTextObjectInterface)
+public:
+    static void TextIconHandler::install(QTextDocument *doc);
+    TextIconHandler(QObject *parent = 0): QObject(parent) {}
+    virtual QSizeF intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format);
+    virtual void drawObject(QPainter *painter, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format);
+};
+
+QSizeF TextIconHandler::intrinsicSize(QTextDocument *doc, int posInDocument, const QTextFormat &format)
+{
+    Q_UNUSED(doc);
+    Q_UNUSED(posInDocument);
+
+    const QTextCharFormat charFormat = format.toCharFormat();
+    return IconsetFactory::iconPixmap(charFormat.stringProperty(TextIconFormat::IconName)).size();
+}
+
+void TextIconHandler::drawObject(QPainter *painter, const QRectF &rect, QTextDocument *doc, int posInDocument, const QTextFormat &format)
+{
+    Q_UNUSED(doc);
+    Q_UNUSED(posInDocument);
+
+    const QTextCharFormat charFormat = format.toCharFormat();
+    const QPixmap pixmap = IconsetFactory::iconPixmap(charFormat.stringProperty(TextIconFormat::IconName));
+    painter->drawPixmap(rect, pixmap, pixmap.rect());
+}
+
+void TextIconHandler::install(QTextDocument *doc)
+{
+    static TextIconHandler *handler = 0;
+    if (!handler) handler = new TextIconHandler(qApp);
+    doc->documentLayout()->registerHandler(IconFormatType, handler);
+}