Add new base time feature

The log view context menu gains a new action "Set base time", which changes the
time column to show the delta to the selected row.

debug-viewer/GstDebugViewer/Data.py

@@ -35,6 +35,20 @@ def time_args (ts):
                                   secs % 60,
                                   ts % SECOND,)
 
+def time_diff_args (time_diff):
+
+    if time_diff >= 0:
+        sign = "+"
+    else:
+        sign = "-"
+
+    secs = abs (time_diff) // SECOND
+
+    return "%s%02i:%02i.%09i" % (sign,
+                                 secs // 60,
+                                 secs % 60,
+                                 abs (time_diff) % SECOND,)
+
 def time_args_no_hours (ts):
 
     secs = ts // SECOND

debug-viewer/GstDebugViewer/GUI/columns.py

@@ -96,14 +96,18 @@ class TextColumn (SizedColumn):
         elif not self.get_modify_func:
             column.add_attribute (cell, "text", self.id)
         else:
-            modify_func = self.get_modify_func ()
-            id_ = self.id
-            def cell_data_func (column, cell, model, tree_iter):
-                cell.props.text = modify_func (model.get (tree_iter, id_)[0])
-            column.set_cell_data_func (cell, cell_data_func)
+            self.update_modify_func (column, cell)
 
         column.props.resizable = True
 
+    def update_modify_func (self, column, cell):
+
+        modify_func = self.get_modify_func ()
+        id_ = self.id
+        def cell_data_func (column, cell, model, tree_iter):
+            cell.props.text = modify_func (model.get (tree_iter, id_)[0])
+        column.set_cell_data_func (cell, cell_data_func)
+
     def compute_default_size (self, view, model):
 
         values = self.get_values_for_size ()
@@ -137,15 +141,27 @@ class TimeColumn (TextColumn):
     id = LazyLogModel.COL_TIME
     font_family = "monospace"
 
-    @staticmethod
-    def get_modify_func ():
+    def __init__ (self, *a, **kw):
 
-        time_args = Data.time_args
-        def format_time (value):
-            # TODO: This is hard coded to omit hours as well as the last 3
-            # digits at the end, since current gst uses g_get_current_time,
-            # which has microsecond precision only.
-            return time_args (value)[2:-3]
+        self.base_time = 0
+
+        TextColumn.__init__ (self, *a, **kw)
+
+    def get_modify_func (self):
+
+        if self.base_time:
+            time_diff_args = Data.time_diff_args
+            base_time = self.base_time
+            def format_time (value):
+                # TODO: Hard coded to omit trailing zeroes, see below.
+                return time_diff_args (value - base_time)[:-3]
+        else:
+            time_args = Data.time_args
+            def format_time (value):
+                # TODO: This is hard coded to omit hours as well as the last 3
+                # digits at the end, since current gst uses g_get_current_time,
+                # which has microsecond precision only.
+                return time_args (value)[2:-3]
 
         return format_time
 
@@ -155,6 +171,14 @@ class TimeColumn (TextColumn):
 
         return values
 
+    def set_base_time (self, base_time):
+
+        self.base_time = base_time
+
+        column = self.view_column
+        cell = column.get_cell_renderers ()[0]
+        self.update_modify_func (column, cell)
+
 class LevelColumn (TextColumn):
 
     name = "level"

debug-viewer/GstDebugViewer/GUI/window.py

@@ -225,6 +225,7 @@ class Window (object):
                             ("show-hidden-lines", None, _("Show hidden lines")),
                             ("edit-copy-line", gtk.STOCK_COPY, _("Copy line"), "<Ctrl>C"),
                             ("edit-copy-message", gtk.STOCK_COPY, _("Copy message"), ""),
+                            ("set-base-time", None, _("Set base time")),
                             ("hide-log-level", None, _("Hide log level")),
                             ("hide-log-category", None, _("Hide log category")),
                             ("hide-log-object", None, _("Hide object")),
@@ -292,7 +293,7 @@ class Window (object):
         for action_name in ("new-window", "open-file", "reload-file",
                             "close-window", "cancel-load",
                             "hide-before-line", "hide-after-line", "show-hidden-lines",
-                            "edit-copy-line", "edit-copy-message",
+                            "edit-copy-line", "edit-copy-message", "set-base-time",
                             "hide-log-level", "hide-log-category", "hide-log-object",
                             "hide-filename", "show-about",):
             name = action_name.replace ("-", "_")
@@ -627,6 +628,12 @@ class Window (object):
 
         self.actions.show_hidden_lines.props.sensitive = True
 
+    def handle_set_base_time_action_activate (self, action):
+
+        row = self.get_active_line ()
+        time_column = self.column_manager.find_item (name = "time")
+        time_column.set_base_time (row[LogModelBase.COL_TIME])
+
     def handle_hide_log_level_action_activate (self, action):
 
         row = self.get_active_line ()

debug-viewer/data/menus.ui

@@ -55,6 +55,7 @@
       </menu>
       <placeholder name="LogViewContextMenuAdditions"/>
       <separator/>
+      <menuitem name="ViewContextMenuSetBaseTime" action="set-base-time"/>
       <menuitem name="ViewContextMenuHideLevel" action="hide-log-level"/>
       <menuitem name="ViewContextMenuHideCategory" action="hide-log-category"/>
       <menuitem name="ViewContextMenuHideObject" action="hide-log-object"/>