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/*
* This file is part of gitg
*
* Copyright (C) 2015 - 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/>.
*/
class Gitg.DiffViewLinesRenderer : Gtk.SourceGutterRendererText
{
public enum Style
{
OLD,
NEW,
SYMBOL,
SYMBOL_OLD,
SYMBOL_NEW
}
private enum Line_Style
{
CONTEXT,
ADDED,
REMOVED,
EMPTY
}
private int d_num_digits;
private string d_num_digits_fill;
private ulong d_view_style_updated_id;
private struct HunkInfo
{
int start;
int end;
int hunk_line;
Ggit.DiffHunk hunk;
string[] line_infos;
}
private Gee.ArrayList<HunkInfo?> d_hunks_list;
public Style style
{
get; construct set;
}
private int d_maxlines;
public int maxlines
{
get { return d_maxlines; }
set
{
if (value > d_maxlines)
{
d_maxlines = value;
calculate_num_digits();
recalculate_size();
}
}
}
public DiffViewLinesRenderer(Style style)
{
Object(style: style);
}
construct
{
d_hunks_list = new Gee.ArrayList<HunkInfo?>();
set_alignment(1.0f, 0.5f);
calculate_num_digits();
}
protected Gtk.TextBuffer buffer
{
get { return get_view().buffer; }
}
protected override void query_data(Gtk.TextIter start, Gtk.TextIter end, Gtk.SourceGutterRendererState state)
{
var line = start.get_line();
bool is_hunk = false;
HunkInfo? info = null;
foreach (var i in d_hunks_list)
{
if (line == i.hunk_line)
{
is_hunk = true;
break;
}
else if (line >= i.start && line <= i.end)
{
info = i;
break;
}
}
if (info == null || (line - info.start) >= info.line_infos.length)
{
if (is_hunk && style != Style.SYMBOL && style != Style.SYMBOL_OLD && style != Style.SYMBOL_NEW)
{
set_text("...", -1);
}
else
{
set_text("", -1);
}
}
else
{
set_text(info.line_infos[start.get_line() - info.start], -1);
}
}
private void on_view_style_updated()
{
recalculate_size();
}
protected override void change_view(Gtk.TextView? old_view)
{
if (old_view != null)
{
old_view.disconnect(d_view_style_updated_id);
d_view_style_updated_id = 0;
}
var view = get_view();
if (view != null)
{
d_view_style_updated_id = view.style_updated.connect(on_view_style_updated);
recalculate_size();
}
base.change_view(old_view);
}
private void recalculate_size()
{
int size = 0;
int height = 0;
measure(@"$d_num_digits_fill", out size, out height);
set_size(size);
}
private void calculate_num_digits()
{
int num_digits;
if (style == Style.OLD || style == Style.NEW)
{
num_digits = 3;
foreach (var info in d_hunks_list)
{
var oldn = info.hunk.get_old_start() + info.hunk.get_old_lines();
var newn = info.hunk.get_new_start() + info.hunk.get_new_lines();
var num = int.max(int.max(oldn, newn), d_maxlines);
var hunk_digits = 0;
while (num > 0)
{
++hunk_digits;
num /= 10;
}
num_digits = int.max(num_digits, hunk_digits);
}
}
else
{
num_digits = 1;
}
d_num_digits = num_digits;
d_num_digits_fill = string.nfill(num_digits, ' ');
}
private Line_Style get_origin(int buffer_line, Gtk.SourceBuffer buffer)
{
var origin = Line_Style.CONTEXT;
var mark = buffer.get_source_marks_at_line(buffer_line, null);
if (mark != null)
{
mark.@foreach ((item) => {
switch (item.get_category())
{
case "added":
origin = Line_Style.ADDED;
break;
case "removed":
origin = Line_Style.REMOVED;
break;
case "empty":
origin = Line_Style.EMPTY;
break;
}
});
}
return origin;
}
private string[] precalculate_line_strings(Ggit.DiffHunk hunk, Gtk.SourceBuffer buffer, int buffer_line_start)
{
var oldn = hunk.get_old_start();
var newn = hunk.get_new_start();
Gtk.TextIter iter;
buffer.get_end_iter(out iter);
int buffer_line_end = iter.get_line();
var line_infos = new string[buffer_line_end - buffer_line_start + 1];
for (var i = 0; i <= (buffer_line_end - buffer_line_start); i++)
{
var origin = get_origin(buffer_line_start + i, buffer);
string ltext = "";
switch (style)
{
case Style.NEW:
if (origin == Line_Style.CONTEXT || origin == Line_Style.ADDED)
{
ltext = "%*d".printf(d_num_digits, newn);
newn++;
}
break;
case Style.OLD:
if (origin == Line_Style.CONTEXT || origin == Line_Style.REMOVED)
{
ltext = "%*d".printf(d_num_digits, oldn);
oldn++;
}
break;
case Style.SYMBOL:
if (origin == Line_Style.ADDED)
{
ltext = "+";
}
else if (origin == Line_Style.REMOVED)
{
ltext = "-";
}
break;
case Style.SYMBOL_OLD:
if (origin == Line_Style.REMOVED)
{
ltext = "-";
}
break;
case Style.SYMBOL_NEW:
if (origin == Line_Style.ADDED)
{
ltext = "+";
}
break;
}
line_infos[i] = ltext;
}
return line_infos;
}
public void add_hunk(int buffer_line_start, int buffer_line_end, Ggit.DiffHunk hunk, Gtk.SourceBuffer buffer)
{
HunkInfo info = HunkInfo();
calculate_num_digits();
info.start = buffer_line_start;
info.end = buffer_line_end;
info.hunk_line = buffer_line_start - 1;
info.hunk = hunk;
info.line_infos = precalculate_line_strings(hunk, buffer, buffer_line_start);
d_hunks_list.add(info);
recalculate_size();
}
}
// ex:ts=4 noet
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