im: add im delegate

This intend to enhance the display of instant messaging

Refs #74531

Change-Id: I0e05aa26bb9b4211238d51722019c160bd5b7996
diff --git a/imdelegate.cpp b/imdelegate.cpp
new file mode 100644
index 0000000..9ba05a7
--- /dev/null
+++ b/imdelegate.cpp
@@ -0,0 +1,87 @@
+/***************************************************************************
+ * Copyright (C) 2015 by Savoir-Faire Linux                                *
+ * Author: Edric Ladent Milaret <edric.ladent-milaret@savoirfairelinux.com>*
+ *                                                                         *
+ * This program is free software; you can redistribute it and/or modify    *
+ * it under the terms of the GNU General Public License as published by    *
+ * the Free Software Foundation; either version 3 of the License, or       *
+ * (at your option) any later version.                                     *
+ *                                                                         *
+ * This program is distributed in the hope that it will be useful,         *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
+ * GNU General Public License for more details.                            *
+ *                                                                         *
+ * You should have received a copy of the GNU General Public License       *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.   *
+ **************************************************************************/
+
+#include "imdelegate.h"
+
+#include "media/text.h"
+#include "media/textrecording.h"
+
+ImDelegate::ImDelegate(QObject *parent)
+    : QStyledItemDelegate(parent), showDate_(false), showAuthor_(false)
+{}
+
+void ImDelegate::setDisplayOptions(ImDelegate::DisplayOptions opt)
+{
+    qDebug() << opt;
+    showAuthor_ = opt & DisplayOptions::AUTHOR;
+    showDate_ = opt & DisplayOptions::DATE;
+}
+
+void
+ImDelegate::paint(QPainter *painter,
+                  const QStyleOptionViewItem &option,
+                  const QModelIndex &index) const
+{
+    QStyleOptionViewItemV4 opt = option;
+    initStyleOption(&opt, index);
+
+    if (index.isValid()) {
+
+        auto msg = index.model()->data(index, Qt::DisplayRole).toString();
+        opt.text = "";
+        QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
+        style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, opt.widget);
+        auto rect = opt.rect;
+        QPalette::ColorGroup cg = opt.state & QStyle::State_Enabled
+                ? QPalette::Normal : QPalette::Disabled;
+        if (cg == QPalette::Normal && !(opt.state & QStyle::State_Active))
+            cg = QPalette::Inactive;
+        painter->setPen(opt.palette.color(cg, QPalette::Text));
+        painter->setOpacity(1.0);
+        auto dir = index.model()->data(
+                    index,
+                    static_cast<int>(Media::TextRecording::Role::Direction))
+                .value<Media::Media::Direction>() == Media::Media::Direction::IN
+                ? Qt::AlignLeft : Qt::AlignRight;
+
+        if (showAuthor_) {
+            auto author = index.model()->
+                    data(index,
+                         static_cast<int>(Media::TextRecording::Role::AuthorDisplayname)).toString();
+            msg = QString("(%1) %2").arg(author, msg);
+        }
+        if (showDate_) {
+            auto formattedDate = index.model()->
+                    data(index,
+                         static_cast<int>(Media::TextRecording::Role::FormattedDate)).toString();
+            msg = QString("[%1] %2").arg(formattedDate, msg);
+        }
+        painter->drawText(QRect(rect.left(), rect.top(), rect.width(), rect.height()),
+                          dir, msg);
+    }
+}
+
+QSize
+ImDelegate::sizeHint(const QStyleOptionViewItem &option,
+                     const QModelIndex &index) const
+{
+    QSize result = QStyledItemDelegate::sizeHint(option, index);
+    result.setHeight(result.height());
+    return result;
+}
+