gitg/libgitg/gitg-diff-view.vala
Jesse van den Kieboom bf021dcadd Do not assume external gsettings schemas exist
The problem with GSettings is that it errors when a schema is not found
causing the application to abort. We now check for schema existence of
external schemas that we optionally want to use.

https://bugzilla.gnome.org/show_bug.cgi?id=721748
2014-01-08 14:48:40 +01:00

481 lines
9.9 KiB
Vala

/*
* This file is part of gitg
*
* Copyright (C) 2012 - Jesse van den Kieboom
*
* 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
{
public class DiffView : WebKit.WebView
{
private class DiffViewRequestInternal : DiffViewRequest
{
public DiffViewRequestInternal(DiffView? view, WebKit.URISchemeRequest request, Soup.URI uri)
{
base(view, request, uri);
}
protected override InputStream? run_async(Cancellable? cancellable) throws Error
{
Idle.add(() => {
switch (parameter("action"))
{
case "selection-changed":
d_view.update_has_selection(parameter("value") == "yes");
break;
}
return false;
});
return null;
}
}
private Ggit.Diff? d_diff;
private Commit? d_commit;
private Settings? d_fontsettings;
private bool d_has_selection;
private static Gee.HashMap<string, DiffView> s_diff_map;
private static uint64 s_diff_id;
public File? custom_css { get; construct; }
public File? custom_js { get; construct; }
public Ggit.DiffOptions? options { get; construct set; }
[Notify]
public bool has_selection
{
get { return d_has_selection; }
}
private Cancellable d_cancellable;
private bool d_loaded;
private ulong d_diffid;
public Ggit.Diff? diff
{
get { return d_diff; }
set
{
d_diff = value;
d_commit = null;
update();
}
}
public Commit? commit
{
get { return d_commit; }
set
{
d_commit = value;
d_diff = null;
update();
}
}
public bool wrap { get; set; default = true; }
public bool staged { get; set; default = false; }
public bool unstaged { get; set; default = false; }
public int tab_width { get; set; default = 4; }
static construct
{
s_diff_map = new Gee.HashMap<string, DiffView>();
var context = WebKit.WebContext.get_default();
context.register_uri_scheme("gitg-diff", gitg_diff_request);
context.register_uri_scheme("mailto", gitg_diff_mailto_request);
context.set_cache_model(WebKit.CacheModel.DOCUMENT_VIEWER);
}
private string json_settings()
{
var o = new Json.Object();
o.set_boolean_member("wrap", wrap);
o.set_int_member("tab_width", tab_width);
o.set_boolean_member("staged", staged);
o.set_boolean_member("unstaged", unstaged);
o.set_boolean_member("debug", Environment.get_variable("GITG_GTK_DIFF_VIEW_DEBUG") != null);
var strings = new Json.Object();
strings.set_string_member("stage", _("stage"));
strings.set_string_member("unstage", _("unstage"));
strings.set_string_member("loading_diff", _("Loading diff…"));
o.set_object_member("strings", strings);
var gen = new Json.Generator();
var node = new Json.Node(Json.NodeType.OBJECT);
node.set_object(o);
gen.set_root(node);
size_t l;
var ret = gen.to_data(out l);
return ret[0:(long)l];
}
private static DiffViewRequest? parse_request(WebKit.URISchemeRequest request)
{
var uri = new Soup.URI(request.get_uri());
var path = uri.get_path();
var parts = path.split("/", 3);
if (parts.length != 3)
{
return null;
}
uri.set_scheme(parts[1]);
uri.set_path("/" + parts[2]);
DiffView? view = null;
var q = uri.get_query();
if (q != null)
{
var f = Soup.Form.decode(q);
var vid = f.lookup("viewid");
if (vid != null && s_diff_map.has_key(vid))
{
view = s_diff_map[vid];
}
}
switch (parts[1])
{
case "resource":
return new DiffViewRequestResource(view, request, uri);
case "diff":
return new DiffViewRequestDiff(view, request, uri);
case "patch":
return new DiffViewRequestPatch(view, request, uri);
case "internal":
return new DiffViewRequestInternal(view, request, uri);
}
return null;
}
private static void gitg_diff_mailto_request(WebKit.URISchemeRequest request)
{
try
{
Gtk.show_uri(null, request.get_uri(), 0);
} catch {}
}
private static void gitg_diff_request(WebKit.URISchemeRequest request)
{
var req = parse_request(request);
if (req == null)
{
return;
}
if (req.view != null)
{
req.view.request(req);
}
else
{
req.run(null);
}
}
private void parse_font(string val, ref string family, ref uint size)
{
var fdesc = Pango.FontDescription.from_string(val);
var f = fdesc.get_family();
var s = fdesc.get_size();
if (f != null && f != "")
{
family = f;
}
if (s != 0)
{
if (fdesc.get_size_is_absolute())
{
size = s;
}
else
{
size = s / Pango.SCALE;
}
size = (uint)(size * get_screen().get_resolution() / 72.0);
}
}
public void request(DiffViewRequest request)
{
var did = request.parameter("diffid");
if (did != null)
{
uint64 i = uint64.parse(did);
if (i == d_diffid)
{
request.run(d_cancellable);
return;
}
}
// Still finish request, but with something bogus
request.finish_empty();
}
private void update_font_settings()
{
var settings = get_settings();
var fname = settings.default_font_family;
var fsize = settings.default_font_size;
parse_font(d_fontsettings.get_string("font-name"), ref fname, ref fsize);
settings.default_font_family = fname;
settings.default_font_size = fsize;
fname = settings.monospace_font_family;
fsize = settings.default_monospace_font_size;
parse_font(d_fontsettings.get_string("monospace-font-name"), ref fname, ref fsize);
settings.monospace_font_family = fname;
settings.default_monospace_font_size = fsize;
}
private Settings? try_settings(string schema_id)
{
var source = SettingsSchemaSource.get_default();
if (source == null)
{
return null;
}
if (source.lookup(schema_id, true) != null)
{
return new Settings(schema_id);
}
return null;
}
protected override void constructed()
{
base.constructed();
var settings = new WebKit.Settings();
var dbg = Environment.get_variable("GITG_GTK_DIFF_VIEW_DEBUG") != null;
if (dbg)
{
settings.enable_developer_extras = true;
settings.enable_write_console_messages_to_stdout = true;
}
settings.javascript_can_access_clipboard = true;
settings.enable_page_cache = false;
set_settings(settings);
d_fontsettings = try_settings("org.gnome.desktop.interface");
if (d_fontsettings != null)
{
update_font_settings();
d_fontsettings.changed["monospace-font-name"].connect((s, k) => {
update_font_settings();
});
d_fontsettings.changed["font-name"].connect((s, k) => {
update_font_settings();
});
}
++s_diff_id;
s_diff_map[s_diff_id.to_string()] = this;
d_cancellable = new Cancellable();
d_loaded = false;
load_changed.connect((v, ev) => {
if (ev == WebKit.LoadEvent.FINISHED)
{
d_loaded = true;
update();
}
});
// Load the diff base html
var uri = "gitg-diff:///resource/org/gnome/gitg/gtk/diff-view/diff-view.html?viewid=" + s_diff_id.to_string();
uri += "&settings=" + Soup.URI.encode(json_settings(), null);
load_uri(uri);
}
public DiffView()
{
Object();
}
private void update()
{
if (!d_loaded)
{
return;
}
// If both `d_diff` and `d_commit` are null, clear
// the diff content
if (d_diff == null && d_commit == null)
{
run_javascript.begin("update_diff();", d_cancellable, (obj, res) => {
try
{
run_javascript.end(res);
} catch {}
});
return;
}
// Cancel running operations
d_cancellable.cancel();
d_cancellable = new Cancellable();
++d_diffid;
if (d_commit != null)
{
d_diff = d_commit.get_diff(options);
}
if (d_diff != null)
{
run_javascript.begin("update_diff(%lu, %s);".printf(d_diffid, json_settings()), d_cancellable, (obj, res) => {
try
{
run_javascript.end(res);
} catch {}
});
}
}
public void update_has_selection(bool hs)
{
if (d_has_selection != hs)
{
d_has_selection = hs;
notify_property("has-selection");
}
}
private PatchSet parse_patchset(Json.Node node)
{
PatchSet ret = new PatchSet();
var elems = node.get_array();
ret.filename = elems.get_element(0).get_string();
var ps = elems.get_element(1).get_array();
var l = ps.get_length();
ret.patches = new PatchSet.Patch[l];
for (uint i = 0; i < l; i++)
{
var p = ps.get_element(i).get_array();
ret.patches[i] = PatchSet.Patch() {
type = (PatchSet.Type)p.get_element(0).get_int(),
old_offset = (size_t)p.get_element(1).get_int(),
new_offset = (size_t)p.get_element(2).get_int(),
length = (size_t)p.get_element(3).get_int()
};
}
return ret;
}
public async PatchSet[] get_selection()
{
WebKit.JavascriptResult jsret;
try
{
jsret = yield run_javascript("get_selection();", d_cancellable);
}
catch (Error e)
{
stderr.printf("Error running get_selection(): %s\n", e.message);
return new PatchSet[] {};
}
var json = GitgJsUtils.get_json(jsret);
var parser = new Json.Parser();
try
{
parser.load_from_data(json, -1);
}
catch (Error e)
{
stderr.printf("Error parsing json: %s\n", e.message);
return new PatchSet[] {};
}
var root = parser.get_root();
var elems = root.get_array();
var l = elems.get_length();
var ret = new PatchSet[l];
for (uint i = 0; i < l; i++)
{
ret[i] = parse_patchset(elems.get_element(i));
}
return ret;
}
}
}
// ex:ts=4 noet