Fix Bug 326210 - Dolphin unnecessarily truncates names of soft links in compact mode

FIXED-IN: 4.13.0
BUG: 326210
BUG: 310592
REVIEW: 116121

dolphin/src/kitemviews/kfileitemlistwidget.cpp

@@ -46,6 +46,15 @@ QString KFileItemListWidgetInformant::itemText(int index, const KItemListView* v
     return item.text();
 }
 
+bool KFileItemListWidgetInformant::itemIsLink(int index, const KItemListView* view) const
+{
+    Q_ASSERT(qobject_cast<KFileItemModel*>(view->model()));
+    KFileItemModel* fileItemModel = static_cast<KFileItemModel*>(view->model());
+
+    const KFileItem item = fileItemModel->fileItem(index);
+    return item.isLink();
+}
+
 QString KFileItemListWidgetInformant::roleText(const QByteArray& role,
                                                const QHash<QByteArray, QVariant>& values) const
 {
@@ -81,6 +90,15 @@ QString KFileItemListWidgetInformant::roleText(const QByteArray& role,
     return text;
 }
 
+QFont KFileItemListWidgetInformant::customizedFontForLinks(const QFont& baseFont) const
+{
+    // The customized font should be italic if the file is a symbolic link.
+    QFont font(baseFont);
+    font.setItalic(true);
+    return font;
+}
+
+
 KFileItemListWidget::KFileItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent) :
     KStandardItemListWidget(informant, parent)
 {

dolphin/src/kitemviews/kfileitemlistwidget.h

@@ -32,7 +32,9 @@ public:
 
 protected:
     virtual QString itemText(int index, const KItemListView* view) const;
+    virtual bool itemIsLink(int index, const KItemListView* view) const;
     virtual QString roleText(const QByteArray& role, const QHash<QByteArray, QVariant>& values) const;
+    virtual QFont customizedFontForLinks(const QFont& baseFont) const;
 };
 
 class LIBDOLPHINPRIVATE_EXPORT KFileItemListWidget : public KStandardItemListWidget

dolphin/src/kitemviews/kstandarditemlistwidget.cpp

@@ -86,16 +86,22 @@ qreal KStandardItemListWidgetInformant::preferredRoleColumnWidth(const QByteArra
     const QString text = roleText(role, values);
     qreal width = KStandardItemListWidget::columnPadding(option);
 
+    const QFontMetrics& normalFontMetrics = option.fontMetrics;
+    const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
+
     if (role == "rating") {
         width += KStandardItemListWidget::preferredRatingSize(option).width();
     } else {
-        width += option.fontMetrics.width(text);
+        // If current item is a link, we use the customized link font metrics instead of the normal font metrics.
+        const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
+
+        width += fontMetrics.width(text);
 
         if (role == "text") {
             if (view->supportsItemExpanding()) {
                 // Increase the width by the expansion-toggle and the current expansion level
                 const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
-                const qreal height = option.padding * 2 + qMax(option.iconSize, option.fontMetrics.height());
+                const qreal height = option.padding * 2 + qMax(option.iconSize, fontMetrics.height());
                 width += (expandedParentsCount + 1) * height;
             }
 
@@ -112,6 +118,11 @@ QString KStandardItemListWidgetInformant::itemText(int index, const KItemListVie
     return view->model()->data(index).value("text").toString();
 }
 
+bool KStandardItemListWidgetInformant::itemIsLink(int index, const KItemListView* view) const
+{
+    return false;
+}
+
 QString KStandardItemListWidgetInformant::roleText(const QByteArray& role,
                                                    const QHash<QByteArray, QVariant>& values) const
 {
@@ -122,10 +133,15 @@ QString KStandardItemListWidgetInformant::roleText(const QByteArray& role,
     return values.value(role).toString();
 }
 
+QFont KStandardItemListWidgetInformant::customizedFontForLinks(const QFont& baseFont) const
+{
+    return baseFont;
+}
+
 void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const
 {
     const KItemListStyleOption& option = view->styleOption();
-    const QFont& font = option.font;
+    const QFont& normalFont = option.font;
     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 
     const qreal itemWidth = view->itemSize().width();
@@ -133,6 +149,8 @@ void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector
     const qreal additionalRolesSpacing = additionalRolesCount * option.fontMetrics.lineSpacing();
     const qreal spacingAndIconHeight = option.iconSize + option.padding * 3;
 
+    const QFont linkFont = customizedFontForLinks(normalFont);
+
     QTextOption textOption(Qt::AlignHCenter);
     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 
@@ -141,6 +159,9 @@ void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector
             continue;
         }
 
+        // If the current item is a link, we use the customized link font instead of the normal font.
+        const QFont& font = itemIsLink(index, view) ? linkFont : normalFont;
+
         const QString& text = KStringHandler::preProcessWrap(itemText(index, view));
 
         // Calculate the number of lines required for wrapping the name
@@ -172,20 +193,25 @@ void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector
 void KStandardItemListWidgetInformant::calculateCompactLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const
 {
     const KItemListStyleOption& option = view->styleOption();
-    const QFontMetrics& fontMetrics = option.fontMetrics;
+    const QFontMetrics& normalFontMetrics = option.fontMetrics;
     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 
     const QList<QByteArray>& visibleRoles = view->visibleRoles();
     const bool showOnlyTextRole = (visibleRoles.count() == 1) && (visibleRoles.first() == "text");
     const qreal maxWidth = option.maxTextWidth;
     const qreal paddingAndIconWidth = option.padding * 4 + option.iconSize;
-    const qreal height = option.padding * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * option.fontMetrics.lineSpacing());
+    const qreal height = option.padding * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * normalFontMetrics.lineSpacing());
+
+    const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
 
     for (int index = 0; index < sizeHints.count(); ++index) {
         if (!sizeHints.at(index).isEmpty()) {
             continue;
         }
 
+        // If the current item is a link, we use the customized link font metrics instead of the normal font metrics.
+        const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
+
         // For each row exactly one role is shown. Calculate the maximum required width that is necessary
         // to show all roles without horizontal clipping.
         qreal maximumRequiredWidth = 0.0;

dolphin/src/kitemviews/kstandarditemlistwidget.h

@@ -53,6 +53,13 @@ protected:
      */
     virtual QString itemText(int index, const KItemListView* view) const;
 
+    /**
+     * @return The value of the "isLink" role. The default implementation returns false.
+     *         The derived class should reimplement this function, when information about
+     *         links is available and in usage.
+     */
+    virtual bool itemIsLink(int index, const KItemListView* view) const;
+
     /**
      * @return String representation of the role \a role. The representation of
      *         a role might depend on other roles, so the values of all roles
@@ -61,6 +68,11 @@ protected:
     virtual QString roleText(const QByteArray& role,
                              const QHash<QByteArray, QVariant>& values) const;
 
+    /**
+    * @return A font based on baseFont which is customized for symlinks.
+    */
+    virtual QFont customizedFontForLinks(const QFont& baseFont) const;
+
     void calculateIconsLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;
     void calculateCompactLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;
     void calculateDetailsLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;