Add "Get Patch" button to Diff View

libgitg/Makefile.am

@@ -58,6 +58,7 @@ VALA_FILES =					\
 	gitg-diff-view.vala			\
 	gitg-diff-view-request.vala		\
 	gitg-diff-view-request-resource.vala	\
+	gitg-diff-view-request-patch.vala	\
 	gitg-diff-view-request-diff.vala	\
 	gitg-repository-list-box.vala		\
 	gitg-when-mapped.vala			\

libgitg/gitg-diff-view-request-patch.vala

@@ -0,0 +1,118 @@
+/*
+ * This file is part of gitg
+ *
+ * Copyright (C) 2012 - Sindhu S
+ *
+ * gitg 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.
+ *
+ * gitg 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 gitg. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Gitg
+{
+	class DiffViewRequestPatch : DiffViewRequest
+	{
+		private Ggit.Commit? d_commit;
+
+		public DiffViewRequestPatch (DiffView? view, WebKit.URISchemeRequest request, Soup.URI uri)
+		{
+			base(view, request, uri);
+
+			if (has_view)
+			{
+				d_commit = view.commit;
+				// set the view to null else it won't run the request
+				d_view = null;
+				d_hasView = false;
+			}
+		}
+
+		private void create_patch (Gitg.Commit selected_commit, File file)
+		{
+			string commit_message = selected_commit.get_message();
+			string sha1 = selected_commit.get_id().to_string();
+			string legacydate = "Mon Sep 17 00:00:00 2001";
+			string author = selected_commit.get_author().get_name();
+			string author_email = selected_commit.get_author().get_email();
+			string datetime = selected_commit.get_author().get_time().format("%a, %e %b %Y %T %z");
+			string patch_content = "";
+			try
+			{
+				Ggit.DiffList diff = selected_commit.get_diff(null);
+				Ggit.DiffPatch patch;
+				Ggit.DiffDelta delta;
+				var number_of_deltas = diff.get_num_deltas();
+
+				patch_content += "From %s %s".printf(sha1, legacydate);
+				patch_content += "\nFrom: %s <%s>".printf(author, author_email);
+				patch_content += "\nDate: %s".printf(datetime);
+				patch_content += "\nSubject: [PATCH] %s\n\n".printf(commit_message);
+				for (var i = 0; i < number_of_deltas; i++) {
+					diff.get_patch(i, out patch, out delta);
+					patch_content += patch.to_string();
+				}
+				patch_content += "--\n";
+				patch_content += "Gitg\n\n";
+
+				FileUtils.set_contents(file.get_path(), patch_content);
+			}
+			catch (Error e)
+			{
+				// TODO: Route error message to Infobar?
+				stdout.printf("Failed: %s".printf(e.message));
+			}
+		}
+
+		public override void run_after_async()
+		{
+			var selected_commit = (Gitg.Commit) d_commit;
+			string commit_subject = selected_commit.get_subject();
+
+			try
+			{
+				var subject_regex = new Regex("[^\\d\\w \\_\\-]");
+
+				// remove anything that's not:
+				// a) alpha numeric
+				// b) underscore or hyphens
+				// c) single space
+				commit_subject = subject_regex.replace(commit_subject, commit_subject.length, 0, "");
+				// replace single space with hyphen
+				commit_subject = commit_subject.replace(" ", "-");
+			}
+			catch (Error e)
+			{
+				// use an empty default filename
+				commit_subject = "";
+			}
+
+			var chooser = new Gtk.FileChooserDialog("Save Patch File", null,
+			                                        Gtk.FileChooserAction.SAVE,
+			                                        Gtk.Stock.CANCEL,
+			                                        Gtk.ResponseType.CANCEL,
+			                                        Gtk.Stock.SAVE,
+			                                        Gtk.ResponseType.OK);
+			chooser.do_overwrite_confirmation = true;
+			chooser.set_current_name(commit_subject + ".patch");
+
+			chooser.show();
+			chooser.response.connect((dialog, id) => {
+				if (id != -6) {
+					create_patch (selected_commit, chooser.get_file());
+				}
+				chooser.destroy();
+			});
+		}
+	}
+}
+
+// ex:ts=4 noet

libgitg/gitg-diff-view-request.vala

@@ -86,6 +86,9 @@ namespace Gitg
 			return null;
 		}
 
+		protected virtual void run_after_async()
+		{}
+
 		private async InputStream? run_impl(Cancellable? cancellable) throws GLib.Error
 		{
 			SourceFunc callback = run_impl.callback;
@@ -104,6 +107,8 @@ namespace Gitg
 				return null;
 			});
 
+			run_after_async();
+
 			// Wait for it to finish, yield to caller
 			yield;
 

libgitg/gitg-diff-view.vala

@@ -138,6 +138,8 @@ namespace Gitg
 					return new DiffViewRequestResource(view, request, uri);
 				case "diff":
 					return new DiffViewRequestDiff(view, request, uri);
+				case "patch":
+					return new DiffViewRequestPatch(view, request, uri);
 			}
 
 			return null;
@@ -191,7 +193,7 @@ namespace Gitg
 			if (did != null)
 			{
 				uint64 i = uint64.parse(did);
-				
+
 				if (i == d_diffid)
 				{
 					request.run(d_cancellable);

libgitg/resources/diff-view.css

@@ -244,4 +244,12 @@ span.hunk_header, span.file_path {
   vertical-align: middle;
 }
 
+.format_patch_button {
+  float:right;
+  margin-top:13px;
+  padding: 7px;
+  margin-right: 3px;
+  color:black;
+}
+
 /* vi:ts=2:et */

libgitg/resources/diff-view.html

@@ -9,6 +9,7 @@
     <div id="templates">
       <!-- Commit template -->
       <div class="commit">
+        <button class="format_patch_button">Get Patch</button>
         <img class="avatar"/>
         <p>
           <span class="author"></span><br/>

libgitg/resources/diff-view.js

@@ -231,6 +231,12 @@ function update_diff(id, lsettings)
 		if ('commit' in j)
 		{
 			$('#diff_header').html(write_commit(j.commit));
+			$(".format_patch_button").click(function()
+			{
+				var patch_request = new XMLHttpRequest();
+				patch_request.open("GET", "gitg-diff:/patch/?id=" + j.commit.id + "&viewid=" + params.viewid);
+				patch_request.send();
+			});
 		}
 	}