[gnome-font-viewer] font-widget: sync from Sushi

[Cosimo Cecchi <cosimoc src gnome org>]

commit 919dfbe684b75904563b8c6723c9778a4e00aad7
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Sat Jul 6 09:40:53 2019 -0700

    font-widget: sync from Sushi

 src/sushi-font-loader.c | 52 +++++++++++++++--------------------------------
 src/sushi-font-widget.c | 54 +++++++++++++++++++------------------------------
 2 files changed, 37 insertions(+), 69 deletions(-)
---
diff --git a/src/sushi-font-loader.c b/src/sushi-font-loader.c
index c612b41..f7cf1de 100644
--- a/src/sushi-font-loader.c
+++ b/src/sushi-font-loader.c
@@ -60,10 +60,13 @@ static void
 font_load_job_free (FontLoadJob *job)
 {
   g_clear_object (&job->file);
+  g_free (job->face_contents);
 
   g_slice_free (FontLoadJob, job);
 }
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (FontLoadJob, font_load_job_free)
+
 static FT_Face
 create_face_from_contents (FontLoadJob *job,
                            gchar **contents,
@@ -79,34 +82,23 @@ create_face_from_contents (FontLoadJob *job,
                                  &retval);
 
   if (ft_error != 0) {
-    gchar *uri;
-    uri = g_file_get_uri (job->file);
+    g_autofree gchar *uri = g_file_get_uri (job->file);
     g_set_error (error, G_IO_ERROR, 0,
                  "Unable to read the font face file '%s'", uri);
-    retval = NULL;
-    g_free (job->face_contents);
-    g_free (uri);
-  } else {
-    *contents = job->face_contents;
+    return NULL;
   }
 
+  *contents = g_steal_pointer (&job->face_contents);
   return retval;
 }
 
-static void
+static gboolean
 font_load_job_do_load (FontLoadJob *job,
                        GError **error)
 {
-  gchar *contents;
-  gsize length;
-
-  g_file_load_contents (job->file, NULL,
-                        &contents, &length, NULL, error);
-
-  if ((error != NULL) && (*error == NULL)) {
-    job->face_contents = contents;
-    job->face_length = length;
-  }
+  return g_file_load_contents (job->file, NULL,
+                               &job->face_contents, &job->face_length,
+                               NULL, error);
 }
 
 static void
@@ -116,12 +108,12 @@ font_load_job (GTask *task,
                GCancellable *cancellable)
 {
   FontLoadJob *job = user_data;
-  GError *error = NULL;
+  g_autoptr(GError) error = NULL;
 
   font_load_job_do_load (job, &error);
 
   if (error != NULL)
-    g_task_return_error (task, error);
+    g_task_return_error (task, g_steal_pointer (&error));
   else
     g_task_return_boolean (task, TRUE);
 }
@@ -137,21 +129,11 @@ sushi_new_ft_face_from_uri (FT_Library library,
                             gchar **contents,
                             GError **error)
 {
-  FontLoadJob *job = NULL;
-  FT_Face face;
-
-  job = font_load_job_new (library, uri, face_index, NULL, NULL);
-  font_load_job_do_load (job, error);
-
-  if ((error != NULL) && (*error != NULL)) {
-    font_load_job_free (job);
+  g_autoptr(FontLoadJob) job = font_load_job_new (library, uri, face_index, NULL, NULL);
+  if (!font_load_job_do_load (job, error))
     return NULL;
-  }
 
-  face = create_face_from_contents (job, contents, error);
-  font_load_job_free (job);
-
-  return face;
+  return create_face_from_contents (job, contents, error);
 }
 
 /**
@@ -166,12 +148,10 @@ sushi_new_ft_face_from_uri_async (FT_Library library,
                                   gpointer user_data)
 {
   FontLoadJob *job = font_load_job_new (library, uri, face_index, callback, user_data);
-  GTask *task;
+  g_autoptr(GTask) task = g_task_new (NULL, NULL, callback, user_data);
 
-  task = g_task_new (NULL, NULL, callback, user_data);
   g_task_set_task_data (task, job, (GDestroyNotify) font_load_job_free);
   g_task_run_in_thread (task, font_load_job);
-  g_object_unref (task);
 }
 
 /**
diff --git a/src/sushi-font-widget.c b/src/sushi-font-widget.c
index 43b5a0c..144a3d6 100644
--- a/src/sushi-font-widget.c
+++ b/src/sushi-font-widget.c
@@ -173,11 +173,11 @@ text_extents (cairo_t *cr,
               const char *text,
               cairo_text_extents_t *extents)
 {
-  cairo_glyph_t *glyphs;
+  g_autofree cairo_glyph_t *glyphs = NULL;
   gint num_glyphs;
+
   text_to_glyphs (cr, text, &glyphs, &num_glyphs);
   cairo_glyph_extents (cr, glyphs, num_glyphs, extents);
-  g_free (glyphs);
 }
 
 /* adapted from gnome-utils:font-viewer/font-view.c
@@ -194,9 +194,9 @@ draw_string (SushiFontWidget *self,
             const gchar *text,
             gint *pos_y)
 {
+  g_autofree cairo_glyph_t *glyphs = NULL;
   cairo_font_extents_t font_extents;
   cairo_text_extents_t extents;
-  cairo_glyph_t *glyphs;
   GtkTextDirection text_dir;
   gint pos_x;
   gint num_glyphs;
@@ -227,8 +227,6 @@ draw_string (SushiFontWidget *self,
   cairo_move_to (cr, pos_x, *pos_y);
   cairo_show_glyphs (cr, glyphs, num_glyphs);
 
-  g_free (glyphs);
-
   *pos_y += LINE_SPACING / 2;
 }
 
@@ -236,30 +234,25 @@ static gboolean
 check_font_contain_text (FT_Face face,
                          const gchar *text)
 {
-  gunichar *string;
+  g_autofree gunichar *string = NULL;
   glong len, idx;
-  gboolean retval = TRUE;
 
   string = g_utf8_to_ucs4_fast (text, -1, &len);
   for (idx = 0; idx < len; idx++) {
     gunichar c = string[idx];
 
-    if (!FT_Get_Char_Index (face, c)) {
-      retval = FALSE;
-      break;
-    }
+    if (!FT_Get_Char_Index (face, c))
+      return FALSE;
   }
 
-  g_free (string);
-
-  return retval;
+  return TRUE;
 }
 
 static gchar *
 build_charlist_for_face (FT_Face face,
                          gint *length)
 {
-  GString *string;
+  g_autoptr(GString) string = NULL;
   gulong c;
   guint glyph;
   gint total_chars = 0;
@@ -277,16 +270,16 @@ build_charlist_for_face (FT_Face face,
   if (length)
     *length = total_chars;
 
-  return g_string_free (string, FALSE);
+  return g_strdup (string->str);
 }
 
 static gchar *
 random_string_from_available_chars (FT_Face face,
                                     gint n_chars)
 {
-  gchar *chars;
+  g_autofree gchar *chars = NULL;
+  g_autoptr(GString) retval = NULL;
   gint idx, rand, total_chars;
-  GString *retval;
   gchar *ptr, *end;
 
   idx = 0;
@@ -296,7 +289,7 @@ random_string_from_available_chars (FT_Face face,
     return NULL;
 
   if (total_chars <= n_chars)
-    return chars;
+    return g_steal_pointer (&chars);
 
   retval = g_string_new (NULL);
 
@@ -310,7 +303,7 @@ random_string_from_available_chars (FT_Face face,
     idx++;
   }
 
-  return g_string_free (retval, FALSE);
+  return g_strdup (retval->str);
 }
 
 static gboolean
@@ -456,7 +449,8 @@ sushi_font_widget_size_request (GtkWidget *drawing_area,
   cairo_text_extents_t extents;
   cairo_font_extents_t font_extents;
   cairo_font_face_t *font;
-  gint *sizes = NULL, n_sizes, alpha_size, title_size;
+  g_autofree gint *sizes = NULL;
+  gint n_sizes, alpha_size, title_size;
   cairo_t *cr;
   cairo_surface_t *surface;
   FT_Face face = self->face;
@@ -562,7 +556,6 @@ sushi_font_widget_size_request (GtkWidget *drawing_area,
   cairo_destroy (cr);
   cairo_font_face_destroy (font);
   cairo_surface_destroy (surface);
-  g_free (sizes);
 }
 
 static void
@@ -596,7 +589,8 @@ sushi_font_widget_draw (GtkWidget *drawing_area,
                         cairo_t *cr)
 {
   SushiFontWidget *self = SUSHI_FONT_WIDGET (drawing_area);
-  gint *sizes = NULL, n_sizes, alpha_size, title_size, pos_y = 0, i;
+  g_autofree gint *sizes = NULL;
+  gint n_sizes, alpha_size, title_size, pos_y = 0, i;
   cairo_font_face_t *font = NULL;
   FT_Face face = self->face;
   GtkStyleContext *context;
@@ -606,7 +600,7 @@ sushi_font_widget_draw (GtkWidget *drawing_area,
   gint allocated_width, allocated_height;
 
   if (face == NULL)
-    goto end;
+    return FALSE;
 
   context = gtk_widget_get_style_context (drawing_area);
   state = gtk_style_context_get_state (context);
@@ -668,9 +662,7 @@ sushi_font_widget_draw (GtkWidget *drawing_area,
   }
 
  end:
-  if (font != NULL)
-    cairo_font_face_destroy (font);
-  g_free (sizes);
+  cairo_font_face_destroy (font);
 
   return FALSE;
 }
@@ -681,7 +673,7 @@ font_face_async_ready_cb (GObject *object,
                           gpointer user_data)
 {
   SushiFontWidget *self = user_data;
-  GError *error = NULL;
+  g_autoptr(GError) error = NULL;
 
   self->face =
     sushi_new_ft_face_from_uri_finish (result,
@@ -691,7 +683,6 @@ font_face_async_ready_cb (GObject *object,
   if (error != NULL) {
     g_signal_emit (self, signals[ERROR], 0, error);
     g_print ("Can't load the font face: %s\n", error->message);
-    g_error_free (error);
 
     return;
   }
@@ -715,10 +706,7 @@ sushi_font_widget_load (SushiFontWidget *self)
 static void
 sushi_font_widget_init (SushiFontWidget *self)
 {
-  FT_Error err;
-
-  self->face = NULL;
-  err = FT_Init_FreeType (&self->library);
+  FT_Error err = FT_Init_FreeType (&self->library);
 
   if (err != FT_Err_Ok)
     g_error ("Unable to initialize FreeType");