Add preview widgets to epiphany's filechoosers

https://gitlab.gnome.org/GNOME/epiphany/issues/552
https://gitlab.gnome.org/GNOME/epiphany/merge_requests/46

1 files changed, 81 insertions, 0 deletions

diff --git a/add-preview-widget.patch b/add-preview-widget.patch
new file mode 100644
index 000000000000..7fb730286dc9
--- /dev/null
+++ b/add-preview-widget.patch
@@ -0,0 +1,81 @@
+--- src/os-patches/lib/widgets/ephy-file-chooser.c~	2018-09-30 04:45:43.003990684 +0900
++++ src/os-patches/lib/widgets/ephy-file-chooser.c	2018-10-07 00:40:58.833626868 +0900
+@@ -32,6 +32,12 @@
+ #include <gtk/gtk.h>
+ #include <glib/gi18n.h>
+ 
++#include <sys/types.h>
++#include <sys/stat.h>
++#include <glib/gstdio.h>
++
++#define MAX_PREVIEW_SIZE 180
++#define MAX_PREVIEW_SOURCE_SIZE 4096
+ 
+ static GtkFileFilter *
+ ephy_file_chooser_add_pattern_filter (GtkFileChooser *dialog,
+@@ -89,6 +92,53 @@
+   return filth;
+ }
+ 
++static void
++update_preview_cb (GtkFileChooser *file_chooser,
++                        gpointer data)
++{
++  GtkImage *preview = GTK_IMAGE (data);
++  g_autofree char *filename = gtk_file_chooser_get_preview_filename(file_chooser);
++
++  struct g_stat st_buf;
++  if (!filename || g_stat(filename, &st_buf) || (!S_ISREG(st_buf.st_mode))) {
++    gtk_file_chooser_set_preview_widget_active(file_chooser, FALSE);
++    return; // stat failed or file is not regular
++  }
++
++  gint preview_width = 0;
++  gint preview_height = 0;
++  GdkPixbufFormat *preview_format = gdk_pixbuf_get_file_info(filename,
++                                                             &preview_width,
++                                                             &preview_height);
++  if (!preview_format ||
++      preview_width <= 0 || preview_height <= 0 ||
++      preview_width > MAX_PREVIEW_SOURCE_SIZE ||
++      preview_height > MAX_PREVIEW_SOURCE_SIZE) {
++    gtk_file_chooser_set_preview_widget_active(file_chooser, FALSE);
++    return; // unpreviewable, 0px, or unsafely large
++  }
++
++  g_autoptr(GdkPixbuf) pixbuf = NULL;
++  if (preview_width > MAX_PREVIEW_SIZE || preview_height > MAX_PREVIEW_SIZE) {
++    pixbuf = gdk_pixbuf_new_from_file_at_size(filename,
++                                                      MAX_PREVIEW_SIZE,
++                                                      MAX_PREVIEW_SIZE,
++                                                      NULL);
++  }
++  else {
++    pixbuf = gdk_pixbuf_new_from_file(filename, NULL);
++  }
++
++  pixbuf = gdk_pixbuf_apply_embedded_orientation(pixbuf);
++
++  gtk_widget_set_size_request(GTK_WIDGET (preview),
++                                     gdk_pixbuf_get_width(pixbuf) + 6,
++                                     gdk_pixbuf_get_height(pixbuf) + 6);
++
++  gtk_image_set_from_pixbuf(preview, pixbuf);
++  gtk_file_chooser_set_preview_widget_active(file_chooser, pixbuf != NULL);
++}
++
+ GtkFileChooser *
+ ephy_create_file_chooser (const char           *title,
+                           GtkWidget            *parent,
+@@ -121,6 +195,11 @@
+     gtk_file_chooser_native_set_accept_label (GTK_FILE_CHOOSER_NATIVE (dialog), _("_Save"));
+   }
+ 
++  GtkWidget *preview = gtk_image_new();
++  gtk_file_chooser_set_preview_widget(dialog, preview);
++  gtk_file_chooser_set_use_preview_label(dialog, FALSE);
++  g_signal_connect(dialog, "update-preview", G_CALLBACK(update_preview_cb), preview);
++
+   if (default_filter != EPHY_FILE_FILTER_NONE) {
+     filter[EPHY_FILE_FILTER_ALL_SUPPORTED] =
+       ephy_file_chooser_add_mime_filter