libsysprof-gtk: start on a chart row

This is just playing around to get things to render. There is much to do
to ensure that we interact with this well (and cache some values for
faster generation on allocation changes).

src/libsysprof-gtk/meson.build

@@ -8,6 +8,7 @@ libsysprof_gtk_public_sources = [
 
 libsysprof_gtk_private_sources = [
   'sysprof-css.c',
+  'sysprof-mark-chart-row.c',
   'sysprof-progress-cell.c',
   'sysprof-symbol-label.c',
   'sysprof-time-label.c',

src/libsysprof-gtk/sysprof-mark-chart-row-private.h

@@ -0,0 +1,37 @@
+/* sysprof-mark-chart-row-private.h
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.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/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <gtk/gtk.h>
+
+#include <sysprof-analyze.h>
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_MARK_CHART_ROW (sysprof_mark_chart_row_get_type())
+
+G_DECLARE_FINAL_TYPE (SysprofMarkChartRow, sysprof_mark_chart_row, SYSPROF, MARK_CHART_ROW, GtkWidget)
+
+SysprofMarkCatalog *sysprof_mark_chart_row_get_catalog (SysprofMarkChartRow *self);
+void                sysprof_mark_chart_row_set_catalog (SysprofMarkChartRow *self,
+                                                        SysprofMarkCatalog  *catalog);
+
+G_END_DECLS

src/libsysprof-gtk/sysprof-mark-chart-row.c

@@ -0,0 +1,204 @@
+/* sysprof-mark-chart-row.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.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/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include "sysprof-mark-chart-row-private.h"
+
+struct _SysprofMarkChartRow
+{
+  GtkWidget parent_instance;
+  SysprofMarkCatalog *catalog;
+};
+
+enum {
+  PROP_0,
+  PROP_CATALOG,
+  N_PROPS
+};
+
+G_DEFINE_FINAL_TYPE (SysprofMarkChartRow, sysprof_mark_chart_row, GTK_TYPE_WIDGET)
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+sysprof_mark_chart_row_snapshot (GtkWidget   *widget,
+                                 GtkSnapshot *snapshot)
+{
+  SysprofMarkChartRow *self = (SysprofMarkChartRow *)widget;
+  static const GdkRGBA blue = {0,0,1,1};
+  static const GdkRGBA red = {1,0,0,1};
+  static const GdkRGBA white = {1,1,1,1};
+  GListModel *model;
+  PangoLayout *layout;
+  guint n_items;
+  int width;
+  int height;
+
+  g_assert (SYSPROF_IS_MARK_CHART_ROW (self));
+  g_assert (GTK_IS_SNAPSHOT (snapshot));
+
+  if (self->catalog == NULL)
+    return;
+
+  width = gtk_widget_get_width (widget);
+  height = gtk_widget_get_height (widget);
+
+  model = G_LIST_MODEL (self->catalog);
+  n_items = g_list_model_get_n_items (model);
+
+  layout = gtk_widget_create_pango_layout (widget, NULL);
+
+  for (guint i = 0; i < n_items; i++)
+    {
+      g_autoptr(SysprofDocumentMark) mark = g_list_model_get_item (model, i);
+      double begin, end;
+
+      sysprof_document_mark_get_time_fraction (mark, &begin, &end);
+
+      if (begin == end)
+        {
+          gtk_snapshot_save (snapshot);
+          gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (begin*width, height/2));
+          gtk_snapshot_rotate (snapshot, 45.f);
+          gtk_snapshot_append_color (snapshot,
+                                     &red,
+                                     &GRAPHENE_RECT_INIT (-5, -5, 10, 10));
+          gtk_snapshot_restore (snapshot);
+        }
+      else
+        {
+          const char *message = sysprof_document_mark_get_message (mark);
+
+          gtk_snapshot_append_color (snapshot,
+                                     &blue,
+                                     &GRAPHENE_RECT_INIT (begin*width, 0, end*width, height));
+
+          if (message)
+            {
+              pango_layout_set_text (layout, message, -1);
+
+              gtk_snapshot_save (snapshot);
+              gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_INIT (begin*width, 0, end*width, height));
+              gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (begin*width, 0));
+              gtk_snapshot_append_layout (snapshot, layout, &white);
+              gtk_snapshot_pop (snapshot);
+              gtk_snapshot_restore (snapshot);
+            }
+        }
+    }
+
+  g_object_unref (layout);
+}
+
+static void
+sysprof_mark_chart_row_dispose (GObject *object)
+{
+  SysprofMarkChartRow *self = (SysprofMarkChartRow *)object;
+
+  g_clear_object (&self->catalog);
+
+  G_OBJECT_CLASS (sysprof_mark_chart_row_parent_class)->dispose (object);
+}
+
+static void
+sysprof_mark_chart_row_get_property (GObject    *object,
+                                     guint       prop_id,
+                                     GValue     *value,
+                                     GParamSpec *pspec)
+{
+  SysprofMarkChartRow *self = SYSPROF_MARK_CHART_ROW (object);
+
+  switch (prop_id)
+    {
+    case PROP_CATALOG:
+      g_value_set_object (value, sysprof_mark_chart_row_get_catalog (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_mark_chart_row_set_property (GObject      *object,
+                                     guint         prop_id,
+                                     const GValue *value,
+                                     GParamSpec   *pspec)
+{
+  SysprofMarkChartRow *self = SYSPROF_MARK_CHART_ROW (object);
+
+  switch (prop_id)
+    {
+    case PROP_CATALOG:
+      sysprof_mark_chart_row_set_catalog (self, g_value_get_object (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_mark_chart_row_class_init (SysprofMarkChartRowClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  object_class->dispose = sysprof_mark_chart_row_dispose;
+  object_class->get_property = sysprof_mark_chart_row_get_property;
+  object_class->set_property = sysprof_mark_chart_row_set_property;
+
+  widget_class->snapshot = sysprof_mark_chart_row_snapshot;
+
+  properties [PROP_CATALOG] =
+    g_param_spec_object ("catalog", NULL, NULL,
+                         SYSPROF_TYPE_MARK_CATALOG,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+sysprof_mark_chart_row_init (SysprofMarkChartRow *self)
+{
+}
+
+SysprofMarkCatalog *
+sysprof_mark_chart_row_get_catalog (SysprofMarkChartRow *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_MARK_CHART_ROW (self), NULL);
+
+  return self->catalog;
+}
+
+void
+sysprof_mark_chart_row_set_catalog (SysprofMarkChartRow *self,
+                                    SysprofMarkCatalog  *catalog)
+{
+  g_return_if_fail (SYSPROF_IS_MARK_CHART_ROW (self));
+  g_return_if_fail (!catalog || SYSPROF_IS_MARK_CATALOG (catalog));
+
+  if (g_set_object (&self->catalog, catalog))
+    {
+      g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_CATALOG]);
+      gtk_widget_queue_draw (GTK_WIDGET (self));
+    }
+}

src/libsysprof-gtk/sysprof-mark-chart.c

@@ -22,6 +22,7 @@
 
 #include "sysprof-css-private.h"
 #include "sysprof-mark-chart.h"
+#include "sysprof-mark-chart-row-private.h"
 
 #include "libsysprof-gtk-resources.h"
 
@@ -153,6 +154,7 @@ sysprof_mark_chart_class_init (SysprofMarkChartClass *klass)
 
   g_resources_register (libsysprof_gtk_get_resource ());
 
+  g_type_ensure (SYSPROF_TYPE_MARK_CHART_ROW);
   g_type_ensure (SYSPROF_TYPE_DOCUMENT_MARK);
 }
 

src/libsysprof-gtk/sysprof-mark-chart.ui

@@ -41,16 +41,28 @@
 <interface>
   <template class="GtkListItem">
     <property name="child">
-      <object class="GtkInscription">
-        <property name="xalign">0</property>
-        <property name="nat-chars">40</property>
-        <property name="min-chars">40</property>
-        <property name="text-overflow">clip</property>
-        <binding name="text">
-          <lookup name="name" type="SysprofMarkCatalog">
-            <lookup name="item">GtkListItem</lookup>
-          </lookup>
-        </binding>
+      <object class="GtkBox">
+        <child>
+          <object class="GtkInscription">
+            <property name="xalign">0</property>
+            <property name="nat-chars">40</property>
+            <property name="min-chars">40</property>
+            <property name="text-overflow">clip</property>
+            <binding name="text">
+              <lookup name="name" type="SysprofMarkCatalog">
+                <lookup name="item">GtkListItem</lookup>
+              </lookup>
+            </binding>
+          </object>
+        </child>
+        <child>
+          <object class="SysprofMarkChartRow">
+            <property name="hexpand">true</property>
+            <binding name="catalog">
+              <lookup name="item">GtkListItem</lookup>
+            </binding>
+          </object>
+        </child>
       </object>
     </property>
   </template>