Add an elide mode preference for the Qt packet list.

Change-Id: I081cc1e9b2a0eea7f0a3ef1157561c50beb4c4db
Reviewed-on: https://code.wireshark.org/review/9902
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Gerald Combs <gerald@wireshark.org>

epan/prefs.c

@@ -194,6 +194,14 @@ static const gchar *capture_cols[5] = {
     "Possible values: INTERFACE, LINK, PMODE, SNAPLEN, FILTER\n"
 #endif
 
+static const enum_val_t gui_packet_list_elide_mode[] = {
+    {"LEFT", "LEFT", ELIDE_LEFT},
+    {"RIGHT", "RIGHT", ELIDE_RIGHT},
+    {"MIDDLE", "MIDDLE", ELIDE_MIDDLE},
+    {"NONE", "NONE", ELIDE_NONE},
+    {NULL, NULL, -1}
+};
+
 /*
  * List of all modules with preference settings.
  */
@@ -2347,6 +2355,11 @@ prefs_register_modules(void)
                                    "Enable Packet Editor (Experimental)",
                                    &prefs.gui_packet_editor);
 
+    prefs_register_enum_preference(gui_module, "packet_list_elide_mode",
+                       "Elide mode",
+                       "The position of \"...\" in packet list text.",
+                       (gint*)(void*)(&prefs.gui_packet_list_elide_mode), gui_packet_list_elide_mode, FALSE);
+
     /* Console
      * These are preferences that can be read/written using the
      * preference module API.  These preferences still use their own
@@ -2980,6 +2993,7 @@ pre_init_prefs(void)
     prefs.gui_layout_content_2       = layout_pane_content_pdetails;
     prefs.gui_layout_content_3       = layout_pane_content_pbytes;
     prefs.gui_packet_editor          = FALSE;
+    prefs.gui_packet_list_elide_mode = ELIDE_RIGHT;
 
     prefs.gui_qt_packet_list_separator = FALSE;
 

epan/prefs.h

@@ -126,6 +126,14 @@ typedef enum {
     pref_current
 } pref_source_t;
 
+typedef enum {
+    ELIDE_LEFT,
+    ELIDE_RIGHT,
+    ELIDE_MIDDLE,
+    ELIDE_NONE
+} elide_mode_e;
+
+
 /*
  * Update channel.
  */
@@ -214,6 +222,7 @@ typedef struct _e_prefs {
   gboolean     unknown_colorfilters; /* unknown or obsolete color filter(s) */
   gboolean     gui_qt_packet_list_separator;
   gboolean     gui_packet_editor; /* Enable Packet Editor */
+  elide_mode_e gui_packet_list_elide_mode;
   gboolean     st_enable_burstinfo;
   gboolean     st_burst_showcount;
   gint         st_burst_resolution;

ui/qt/main_window.cpp

@@ -414,6 +414,8 @@ MainWindow::MainWindow(QWidget *parent) :
             packet_list_, SLOT(applyRecentColumnWidths()));
     connect(wsApp, SIGNAL(columnsChanged()),
             packet_list_, SLOT(columnsChanged()));
+    connect(wsApp, SIGNAL(preferencesChanged()),
+            packet_list_, SLOT(elideModeChanged()));
     connect(wsApp, SIGNAL(recentFilesRead()),
             this, SLOT(applyRecentPaneGeometry()));
     connect(wsApp, SIGNAL(packetDissectionChanged()),

ui/qt/packet_list.cpp

@@ -678,6 +678,28 @@ void PacketList::applyRecentColumnWidths()
     column_state_ = header()->saveState();
 }
 
+// This sets the mode for the entire view. If we want to make this setting
+// per-column we'll either have to generalize RelatedPacketDelegate so that
+// we can set it for entire rows or create another delegate.
+void PacketList::elideModeChanged()
+{
+    Qt::TextElideMode elide_mode = Qt::ElideRight;
+    switch (prefs.gui_packet_list_elide_mode) {
+    case ELIDE_LEFT:
+        elide_mode = Qt::ElideLeft;
+        break;
+    case ELIDE_MIDDLE:
+        elide_mode = Qt::ElideMiddle;
+        break;
+    case ELIDE_NONE:
+        elide_mode = Qt::ElideNone;
+        break;
+    default:
+        break;
+    }
+    setTextElideMode(elide_mode);
+}
+
 void PacketList::recolorPackets()
 {
     packet_list_model_->resetColorized();

ui/qt/packet_list.h

@@ -149,6 +149,7 @@ public slots:
     void redrawVisiblePackets();
     void columnsChanged();
     void applyRecentColumnWidths();
+    void elideModeChanged();
 
 private slots:
     void showHeaderMenu(QPoint pos);