Implemented QAccessibleTextEdit::attributes()

Handling font properties and colors
Created test: tst_QAccessibility::textAttributes

Merge-request: 2626
Reviewed-by: Harald Fernengel <harald.fernengel@nokia.com>
(cherry picked from commit f1a6766432f66220275aa7902e4c2414a3069cd1)

Change-Id: I388bc660af20149934110d7894840eccecf81f2a
Reviewed-on: http://codereview.qt.nokia.com/3036
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@nokia.com>

2 files changed, 161 insertions, 5 deletions

diff --git a/src/plugins/accessible/widgets/qaccessiblewidgets.cpp b/src/plugins/accessible/widgets/qaccessiblewidgets.cpp
index 45322e53d8..a0dde37ed6 100644
--- a/src/plugins/accessible/widgets/qaccessiblewidgets.cpp
+++ b/src/plugins/accessible/widgets/qaccessiblewidgets.cpp
@@ -1321,11 +1321,112 @@ void QAccessibleTextEdit::addSelection(int startOffset, int endOffset)
 
 QString QAccessibleTextEdit::attributes(int offset, int *startOffset, int *endOffset)
 {
-    // TODO - wait for a definition of attributes
-    Q_UNUSED(offset);
-    Q_UNUSED(startOffset);
-    Q_UNUSED(endOffset);
-    return QString();
+    /* The list of attributes can be found at:
+     http://linuxfoundation.org/collaborate/workgroups/accessibility/iaccessible2/textattributes
+    */
+
+    if (offset >= characterCount()) {
+        *startOffset = -1;
+        *endOffset = -1;
+        return QString();
+    }
+
+    QMap<QString, QString> attrs;
+
+    QTextCursor cursor = textEdit()->textCursor();
+
+    //cursor.charFormat returns the format of the previous character
+    cursor.setPosition(offset + 1);
+    QTextCharFormat charFormat = cursor.charFormat();
+
+    cursor.setPosition(offset);
+    QTextBlockFormat blockFormat = cursor.blockFormat();
+
+    QTextCharFormat charFormatComp;
+    QTextBlockFormat blockFormatComp;
+
+    *startOffset = offset;
+    cursor.setPosition(*startOffset);
+    while (*startOffset > 0) {
+        charFormatComp = cursor.charFormat();
+        cursor.setPosition(*startOffset - 1);
+        blockFormatComp = cursor.blockFormat();
+        if ((charFormat == charFormatComp) && (blockFormat == blockFormatComp))
+            (*startOffset)--;
+        else
+            break;
+    }
+
+    int limit = characterCount() + 1;
+    *endOffset = offset + 1;
+    cursor.setPosition(*endOffset);
+    while (*endOffset < limit) {
+        blockFormatComp = cursor.blockFormat();
+        cursor.setPosition(*endOffset + 1);
+        charFormatComp = cursor.charFormat();
+        if ((charFormat == charFormatComp) && (cursor.blockFormat() == blockFormatComp))
+            (*endOffset)++;
+        else
+            break;
+    }
+
+    QString family = charFormat.fontFamily();
+    if (!family.isEmpty()) {
+        family = family.replace('\\',"\\\\");
+        family = family.replace(':',"\\:");
+        family = family.replace(',',"\\,");
+        family = family.replace('=',"\\=");
+        family = family.replace(';',"\\;");
+        family = family.replace('\"',"\\\"");
+        attrs["font-family"] = '"'+family+'"';
+    }
+
+    int fontSize = int(charFormat.fontPointSize());
+    if (fontSize)
+        attrs["font-size"] = QString::number(fontSize).append("pt");
+
+    //Different weight values are not handled
+    attrs["font-weight"] = (charFormat.fontWeight() > QFont::Normal) ? "bold" : "normal";
+
+    QFont::Style style = charFormat.font().style();
+    attrs["font-style"] = (style == QFont::StyleItalic) ? "italic" : ((style == QFont::StyleOblique) ? "oblique": "normal");
+
+    attrs["text-underline-style"] = charFormat.font().underline() ? "solid" : "none";
+
+    QTextCharFormat::VerticalAlignment alignment = charFormat.verticalAlignment();
+    attrs["text-position"] = (alignment == QTextCharFormat::AlignSubScript) ? "sub" : ((alignment == QTextCharFormat::AlignSuperScript) ? "super" : "baseline" );
+
+    QBrush background = charFormat.background();
+    if (background.style() == Qt::SolidPattern) {
+        attrs["background-color"] = QString("rgb(%1,%2,%3)").arg(background.color().red()).arg(background.color().green()).arg(background.color().blue());
+    }
+
+    QBrush foreground = charFormat.foreground();
+    if (foreground.style() == Qt::SolidPattern) {
+        attrs["color"] = QString("rgb(%1,%2,%3)").arg(foreground.color().red()).arg(foreground.color().green()).arg(foreground.color().blue());
+    }
+
+    switch (blockFormat.alignment() & (Qt::AlignLeft | Qt::AlignRight | Qt::AlignHCenter | Qt::AlignJustify)) {
+    case Qt::AlignLeft:
+        attrs["text-align"] = "left";
+        break;
+    case Qt::AlignRight:
+        attrs["text-align"] = "right";
+        break;
+    case Qt::AlignHCenter:
+        attrs["text-align"] = "center";
+        break;
+    case Qt::AlignJustify:
+        attrs["text-align"] = "left";
+        break;
+    }
+
+    QString result;
+    foreach (const QString &attributeName, attrs.keys()) {
+        result.append(attributeName).append(':').append(attrs[attributeName]).append(';');
+    }
+
+    return result;
 }
 
 int QAccessibleTextEdit::cursorPosition()
diff --git a/tests/auto/qaccessibility/tst_qaccessibility.cpp b/tests/auto/qaccessibility/tst_qaccessibility.cpp
index 8390de0de5..1d99cc1dc5 100644
--- a/tests/auto/qaccessibility/tst_qaccessibility.cpp
+++ b/tests/auto/qaccessibility/tst_qaccessibility.cpp
@@ -230,6 +230,7 @@ private slots:
     void navigateHierarchy();
     void navigateSlider();
     void navigateCovered();
+    void textAttributes();
     void hideShowTest();
 
     void userActionCount();
@@ -862,6 +863,60 @@ void tst_QAccessibility::accessibleName()
     QTestAccessibility::clearEvents();
 }
 
+void tst_QAccessibility::textAttributes()
+{
+    QTextEdit textEdit;
+    int startOffset;
+    int endOffset;
+    QString attributes;
+    QString text("<html><head></head><body>"
+                 "Hello, <b>this</b> is an <i><b>example</b> text</i>."
+                 "<span style=\"font-family: monospace\">Multiple fonts are used.</span>"
+                 "Multiple <span style=\"font-size: 8pt\">text sizes</span> are used."
+                 "Let's give some color to <span style=\"color:#f0f1f2; background-color:#14f01e\">Qt</span>."
+                 "</body></html>");
+
+    textEdit.setText(text);
+    QAccessibleInterface *interface = QAccessible::queryAccessibleInterface(&textEdit);
+
+    QAccessibleTextInterface *textInterface=interface->textInterface();
+
+    QVERIFY(textInterface);
+    QCOMPARE(textInterface->characterCount(), 112);
+
+    attributes = textInterface->attributes(10, &startOffset, &endOffset);
+    QCOMPARE(startOffset, 7);
+    QCOMPARE(endOffset, 11);
+    attributes.prepend(';');
+    QVERIFY(attributes.contains(QLatin1String(";font-weight:bold;")));
+
+    attributes = textInterface->attributes(18, &startOffset, &endOffset);
+    QCOMPARE(startOffset, 18);
+    QCOMPARE(endOffset, 25);
+    attributes.prepend(';');
+    QVERIFY(attributes.contains(QLatin1String(";font-weight:bold;")));
+    QVERIFY(attributes.contains(QLatin1String(";font-style:italic;")));
+
+    attributes = textInterface->attributes(34, &startOffset, &endOffset);
+    QCOMPARE(startOffset, 31);
+    QCOMPARE(endOffset, 55);
+    attributes.prepend(';');
+    QVERIFY(attributes.contains(QLatin1String(";font-family:\"monospace\";")));
+
+    attributes = textInterface->attributes(65, &startOffset, &endOffset);
+    QCOMPARE(startOffset, 64);
+    QCOMPARE(endOffset, 74);
+    attributes.prepend(';');
+    QVERIFY(attributes.contains(QLatin1String(";font-size:8pt;")));
+
+    attributes = textInterface->attributes(110, &startOffset, &endOffset);
+    QCOMPARE(startOffset, 109);
+    QCOMPARE(endOffset, 111);
+    attributes.prepend(';');
+    QVERIFY(attributes.contains(QLatin1String(";background-color:rgb(20,240,30);")));
+    QVERIFY(attributes.contains(QLatin1String(";color:rgb(240,241,242);")));
+}
+
 void tst_QAccessibility::hideShowTest()
 {
     QWidget * const window = new QWidget();