1 files changed, 129 insertions, 0 deletions
diff --git a/src/customcellrendererrate.c b/src/customcellrendererrate.c
new file mode 100644
index 0000000..4b7b9bf
--- /dev/null
+++ b/src/customcellrendererrate.c
@@ -0,0 +1,129 @@
+#include "common.h"
+
+#include "customcellrendererrate.h"
+
+static void custom_cell_renderer_rate_get_property(GObject* object,
+                                                   guint param_id,
+                                                   GValue* value,
+                                                   GParamSpec* pspec);
+static void custom_cell_renderer_rate_set_property(GObject* object,
+                                                   guint param_id,
+                                                   const GValue* value,
+                                                   GParamSpec* pspec);
+
+static void convert_rate_to_string(gchar* str, guint size, gfloat rate);
+
+enum {
+  PROP_0,
+  PROP_RATE,
+};
+
+G_DEFINE_TYPE(CustomCellRendererRate, custom_cell_renderer_rate, GTK_TYPE_CELL_RENDERER_TEXT)
+
+static void custom_cell_renderer_rate_init(CustomCellRendererRate* cell_rate)
+{
+    convert_rate_to_string(cell_rate->buffer, sizeof(cell_rate->buffer),
+                           cell_rate->rate);
+    g_object_set(cell_rate, "text", cell_rate->buffer, NULL);
+}
+
+static void custom_cell_renderer_rate_class_init(CustomCellRendererRateClass *cell_rate_class)
+{
+    GObjectClass *object_class;
+    /* GtkCellRendererClass *cell_renderer_class; */
+
+    object_class = G_OBJECT_CLASS(cell_rate_class);
+    /* cell_renderer_class = GTK_CELL_RENDERER_CLASS(cell_rate_class); */
+
+    object_class->set_property = custom_cell_renderer_rate_set_property;
+    object_class->get_property = custom_cell_renderer_rate_get_property;
+
+    g_object_class_install_property(object_class,
+                                    PROP_RATE,
+                                    g_param_spec_float("rate",
+                                                       "Rate",
+                                                       "The transfer rate in kilo (1000) byte per second",
+                                                       0.0,
+                                                       G_MAXFLOAT,
+                                                       0,
+                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
+}
+
+GtkCellRenderer* custom_cell_renderer_rate_new(void)
+{
+    return g_object_new(CUSTOM_TYPE_CELL_RENDERER_RATE, NULL);
+}
+
+void custom_cell_renderer_rate_get_property(GObject* object,
+                                            guint param_id,
+                                            GValue* value,
+                                            GParamSpec* pspec)
+{
+    CustomCellRendererRate* rate = CUSTOM_CELL_RENDERER_RATE(object);
+
+    switch (param_id)
+    {
+    case PROP_RATE:
+        g_value_set_float(value, rate->rate);
+        break;
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);
+    }
+}
+
+void custom_cell_renderer_rate_set_property(GObject* object,
+                                            guint param_id,
+                                            const GValue* value,
+                                            GParamSpec* pspec)
+{
+    CustomCellRendererRate* rate = CUSTOM_CELL_RENDERER_RATE(object);
+    gboolean changed = FALSE;
+
+    switch (param_id)
+    {
+    case PROP_RATE:
+    {
+        gfloat rate_value = g_value_get_float(value);
+
+        if (rate->rate != rate_value)
+        {
+            rate->rate = rate_value;
+            changed = TRUE;
+        }
+        break;
+    }
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);
+    }
+
+    if (changed)
+    {
+        convert_rate_to_string(rate->buffer, sizeof(rate->buffer), rate->rate);
+        g_object_set(rate, "text", rate->buffer, NULL);
+    }
+}
+
+void convert_rate_to_string(gchar* str, guint size, gfloat rate)
+{
+    if (rate <= 0.0f)
+    {
+        g_assert(size >= 1);
+        *str = '\0';
+    }
+    else if (rate < 0.9f)
+    {
+        g_snprintf(str, size, "%3fB", rate * 1000.0f);
+    }
+    else if (rate <= 900.0f)
+    {
+        g_snprintf(str, size, "%3.2fkB", rate);
+    }
+    else if (rate <= 900000.0f)
+    {
+        g_snprintf(str, size, "%3.2fMB", rate / 1000.0f);
+    }
+    else
+    {
+        g_snprintf(str, size, "%3.2fGB", rate / 1000000.0f);
+    }
+}