Create thumbnails of the presentation

CMakeLists.txt

@@ -17,7 +17,7 @@ add_definitions (-DGETTEXT_PACKAGE=\"${GETTEXT_PACKAGE}\")
 add_definitions(-w)
 
 set (PKG_DEPS
-    granite>=0.3
+    granite>=0.4
     gee-0.8
     gtk+-3.0>=3.9.10
     json-glib-1.0

data/CMakeLists.txt

@@ -17,3 +17,7 @@ install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/com.github.philip-scott.spice-up.appda
 # install the mimefile
 install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/com.github.philip-scott.spice-up.mime.xml
         DESTINATION ${CMAKE_INSTALL_FULL_DATAROOTDIR}/mime/packages/)
+
+# install thumbnailer file
+install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/com.github.philip-scott.spice-up.thumbnailer
+        DESTINATION ${CMAKE_INSTALL_FULL_DATAROOTDIR}/thumbnailers/)

data/com.github.philip-scott.spice-up.thumbnailer

@@ -0,0 +1,4 @@
+[Thumbnailer Entry]
+TryExec=com.github.philip-scott.spice-up
+Exec=com.github.philip-scott.spice-up -t %i %o
+MimeType=application/x-spiceup;

data/thumbnailer/com .github.philip-scott.spice-up.Thumbnailer1.service

@@ -0,0 +1,5 @@
+[Specialized Thumbnailer]
+Name=org.freedesktop.thumbnails.Thumbnailer1.spiceup
+ObjectPath=/org/freedesktop/thumbnails/Thumbnailer1/spiceup
+MimeTypes=application/x-spiceup
+Comment=free comment

data/thumbnailer/com.github.philip-scott.spice-up.Thumbnailer1.service

@@ -0,0 +1,3 @@
+[D-BUS Service]
+Name=org.freedesktop.thumbnails.Thumbnailer1.spiceup
+Exec=/usr/bin/com.github.philip-scott.spice-up -b

src/Application.vala

@@ -31,9 +31,11 @@ public class Spice.Application : Granite.Application {
     public const string ABOUT_STOCK = N_("About Spice-Up");
 
     public bool running = false;
+    Spice.DbusThumbnailer? thumbnailer = null;
 
     construct {
         flags |= ApplicationFlags.HANDLES_OPEN;
+        flags |= ApplicationFlags.HANDLES_COMMAND_LINE;
 
         application_id = "com.github.philip-scott.spice-up";
         program_name = PROGRAM_NAME;
@@ -66,7 +68,7 @@ public class Spice.Application : Granite.Application {
     }
 
     public override void activate () {
-        if (!running) {
+        if (window == null) {
             weak Gtk.IconTheme default_theme = Gtk.IconTheme.get_default ();
             default_theme.add_resource_path ("/com/github/philip-scott/spice-up");
 
@@ -79,4 +81,67 @@ public class Spice.Application : Granite.Application {
 
         window.show_app ();
     }
+
+    protected override int command_line (ApplicationCommandLine command_line) {
+        var context = new OptionContext ("File");
+        context.add_main_entries (entries, "com.github.philip-scott.spice-up");
+        context.add_group (Gtk.get_option_group (true));
+
+        string[] args = command_line.get_arguments ();
+        int unclaimed_args;
+
+        try {
+            unowned string[] tmp = args;
+            context.parse (ref tmp);
+            unclaimed_args = tmp.length - 1;
+        } catch(Error e) {
+            print (e.message + "\n");
+
+            return Posix.EXIT_FAILURE;
+        }
+
+        if (start_thumbnailer) {
+            start_thumbnailer = false;
+            if (unclaimed_args > 1) {
+                var files = new List<File>();
+
+                foreach (string arg in args[1:unclaimed_args + 1]) {
+                    var file = File.new_for_commandline_arg (arg);
+                    files.append (file);
+                }
+
+                Spice.Services.Thumbnailer.run (files);
+            }
+        } else if (start_dbus) {
+            start_dbus = false;
+            if (thumbnailer == null) {
+                thumbnailer = new Spice.DbusThumbnailer ();
+
+                new MainLoop ().run ();
+            }
+        } else {
+            activate ();
+
+            if (unclaimed_args > 0) {
+                foreach (string arg in args[1:unclaimed_args + 1]) {
+                    var file = File.new_for_commandline_arg (arg);
+                    var files = new File[1];
+                    files[0] = file;
+
+                    open (files, "");
+                }
+            }
+        }
+
+        return Posix.EXIT_SUCCESS;
+    }
+
+    private static bool start_thumbnailer;
+    private static bool start_dbus;
+
+    const OptionEntry[] entries = {
+        { "thumbnailer", 't', 0, OptionArg.NONE, out start_thumbnailer, N_("Thumbnailer"), null },
+        { "dbus-thumbnailer", 'b', 0, OptionArg.NONE, out start_dbus, N_("Thumbnailer"), null },
+        { null }
+    };
 }

src/CMakeLists.txt

@@ -12,7 +12,10 @@ vala_precompile(VALA_C
   Services/FileManager.vala
   Services/HistoryManager.vala
   Services/Utils.vala
+  Services/Thumbnailer.vala
+  Services/DBusThumnailer.vala
   Services/GamepadSlideController.vala
+
   Widgets/Canvas.vala
   Widgets/ColorButton.vala
   Widgets/EntryCombo.vala

src/Services/DBusThumnailer.vala

@@ -0,0 +1,44 @@
+
+
+[DBus (name = "org.freedesktop.thumbnails.Thumbnailer1.spiceup")]
+public class Spice.Tumbler : GLib.Object {
+    public async uint Queue (string[] uris, string[] mime_types, string flavor, string sheduler, uint handle) throws GLib.IOError, GLib.DBusError {
+        stderr.printf ("Requesting file! \n");
+        var files = new List<File>();
+
+        files.append (File.new_for_uri ("file:///home/felipe/FirstPresentation.spice"));
+        files.append (File.new_for_uri ("file:///home/felipe/FirstPresentation.png"));
+
+        Spice.Services.Thumbnailer.run (files);
+
+        return 0;
+    }
+}
+
+public class Spice.DbusThumbnailer : GLib.Object {
+    private const string THUMBNAILER_IFACE = "org.freedesktop.thumbnails.Thumbnailer1.spiceup";
+    private const string THUMBNAILER_SERVICE = "/org/freedesktop/thumbnails/Thumbnailer1/spiceup";
+
+    private const uint THUMBNAIL_MAX_QUEUE_SIZE = 50;
+
+    Spice.Tumbler tumbler;
+
+    public DbusThumbnailer (string flavor = "normal") throws GLib.Error {
+        tumbler = new Spice.Tumbler ();
+
+        Bus.own_name (BusType.SESSION, THUMBNAILER_IFACE, BusNameOwnerFlags.NONE,
+                      on_bus_aquired,
+                      () => {},
+                      () => stderr.printf ("Could not aquire name\n"));
+    }
+
+    void on_bus_aquired (DBusConnection conn) {
+        stderr.printf ("dbus aquired\n");
+
+        try {
+            conn.register_object (THUMBNAILER_SERVICE, tumbler);
+        } catch (IOError e) {
+            stderr.printf ("Could not register service\n");
+        }
+    }
+}

src/Services/FileManager.vala

@@ -131,18 +131,23 @@ public class Spice.Services.FileManager {
 
     public static string open_file () {
         if (current_file != null && current_file.query_exists ()) {
-            try {
-                var dis = new DataInputStream (current_file.read ());
-                size_t size;
-                return dis.read_upto ("\0", -1, out size);
-            } catch (Error e) {
-                warning ("Error loading file: %s", e.message);
-            }
+            return get_contents (current_file);
         }
 
         return "";
     }
 
+    public static string get_contents (File file) {
+        try {
+            var dis = new DataInputStream (file.read ());
+            size_t size;
+            return dis.read_upto ("\0", -1, out size);
+        } catch (Error e) {
+            warning ("Error loading file: %s", e.message);
+        }
+        return "";
+    }
+
     public static void create_file_if_not_exists (File file) {
         if (!file.query_exists ()) {
             try {

src/Services/Thumbnailer.vala

@@ -0,0 +1,75 @@
+/*
+* Copyright (c) 2017 Felipe Escoto (https://github.com/Philip-Scott/Spice-up)
+*
+* 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 2 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, write to the
+* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+* Boston, MA 02111-1307, USA.
+*
+* Authored by: Felipe Escoto <[email protected]>
+*/
+
+public class Spice.Services.Thumbnailer {
+    private static int width;
+
+    public static void run (List<File> files) {
+        if (files.length () < 1) return;
+        var input = files.nth_data (0);
+        var output = files.nth_data (1);
+
+        if (!input.query_exists ()) return;
+        var data = Spice.Services.FileManager.get_contents (input);
+
+        var preview_data = get_thumbnail_data (data);
+
+        if (preview_data != "") {
+            make_surface (preview_data, output);
+        }
+    }
+
+    private static string get_thumbnail_data (string raw_json) {
+        try {
+            var parser = new Json.Parser ();
+            parser.load_from_data (raw_json);
+
+            var root_object = parser.get_root ().get_object ();
+            var slides_array = root_object.get_array_member ("slides");
+
+            var ratio = (int) root_object.get_int_member ("aspect-ratio");
+            width = Spice.AspectRatio.get_width_value (Spice.AspectRatio.get_mode (ratio));
+
+            var slides = slides_array.get_elements ();
+            if (slides.length () > 0) {
+                var preview_data = slides.nth_data (0).get_object ().get_string_member ("preview");
+
+                if (preview_data != null) return preview_data;
+            }
+        } catch (Error e) {
+            error ("Error loading file: %s", e.message);
+        }
+
+        return "";
+    }
+
+    private static void make_surface (string data, File output_file) {
+        var pixbuf = Utils.base64_to_pixbuf (data);
+        pixbuf.scale_simple (width, SlideList.HEIGHT, Gdk.InterpType.BILINEAR);
+
+        var surface = new Granite.Drawing.BufferSurface (width, SlideList.HEIGHT);
+        Gdk.cairo_set_source_pixbuf (surface.context, pixbuf, 0, 0);
+        surface.context.paint ();
+
+        Spice.Services.FileManager.create_file_if_not_exists (output_file);
+        surface.surface.write_to_png (output_file.get_path ());
+    }
+}

src/Widgets/Canvas.vala

@@ -253,7 +253,6 @@ public class Spice.Canvas : Gtk.Overlay {
         Utils.set_style (grid, CANVAS_CSS.printf (background_color));
 
         grid.style (background_pattern);
-        request_draw_preview ();
     }
 
     public Granite.Drawing.BufferSurface? surface = null;