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// branch_renderer.js - Rendering of branch DAGs on the client side
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//
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// Copyright 2008 Jesper Noehr <jesper AT noehr DOT org>
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// Copyright 2008 Dirkjan Ochtman <dirkjan AT ochtman DOT nl>
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// Copyright 2006 Alexander Schremmer <alex AT alexanderweb DOT de>
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//
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// derived from code written by Scott James Remnant <scott@ubuntu.com>
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// Copyright 2005 Canonical Ltd.
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//
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// This software may be used and distributed according to the terms
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// of the GNU General Public License, incorporated herein by reference.
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var colors = [
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[ 1.0, 0.0, 0.0 ],
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[ 1.0, 1.0, 0.0 ],
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[ 0.0, 1.0, 0.0 ],
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[ 0.0, 1.0, 1.0 ],
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[ 0.0, 0.0, 1.0 ],
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[ 1.0, 0.0, 1.0 ],
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[ 1.0, 1.0, 0.0 ],
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[ 0.0, 0.0, 0.0 ]
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];
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function BranchRenderer() {
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this.canvas = document.getElementById("graph_canvas");
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if (navigator.userAgent.indexOf('MSIE') >= 0)
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this.canvas = window.G_vmlCanvasManager.initElement(this.canvas);
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this.ctx = this.canvas.getContext('2d');
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this.ctx.strokeStyle = 'rgb(0, 0, 0)';
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this.ctx.fillStyle = 'rgb(0, 0, 0)';
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this.cur = [0, 0];
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this.max_column = 1;
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this.line_width = 3;
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this.bg = [0, 4];
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this.cell = [2, 0];
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this.revlink = '';
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this.scale = function(height) {
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this.box_size = Math.floor(height/1.2);
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this.cell_height = this.box_size;
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this.bg_height = height;
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}
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this.setColor = function(color, bg, fg) {
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color %= colors.length;
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var red = (colors[color][0] * fg) || bg;
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var green = (colors[color][1] * fg) || bg;
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var blue = (colors[color][2] * fg) || bg;
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red = Math.round(red * 255);
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green = Math.round(green * 255);
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blue = Math.round(blue * 255);
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var s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
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this.ctx.strokeStyle = s;
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this.ctx.fillStyle = s;
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}
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this.render = function(data) {
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var idx = 1;
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var rela = document.getElementById('graph');
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var pad = 160;
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var scale = 20;
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for (var i in data) {
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this.scale(scale);
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var row = document.getElementById("chg_"+idx);
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var next = document.getElementById("chg_"+idx+1);
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var extra = 0;
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//skip this since i don't have DATE in my app
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//if (next.is('.changesets-date')) {
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// extra = next.outerHeight();
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//}
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this.cell[1] += row.clientWidth;
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this.bg[1] += this.bg_height;
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cur = data[i];
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nodeid = cur[0];
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node = cur[1];
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in_l = cur[2];
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for (var j in in_l) {
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line = in_l[j];
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start = line[0];
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end = line[1];
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color = line[2];
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if (start > this.max_column) {
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this.max_column = start;
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}
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if (end > this.max_column) {
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this.max_column = end;
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}
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this.setColor(color, 0.0, 0.65);
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y = row.offsetTop-rela.offsetTop+4;
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x = pad-((this.cell[0] + this.box_size * start - 1) + this.bg_height-2);
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this.ctx.beginPath();
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this.ctx.moveTo(x, y);
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//i don't know why it's +1 just fixes some drawing graph.
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y += row.clientHeight+1;
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x = pad-((1 + this.box_size * end) + this.bg_height-2);
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this.ctx.lineTo(x,y+extra);
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this.ctx.stroke();
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}
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column = node[0]
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color = node[1]
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radius = 4;
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y = row.offsetTop-rela.offsetTop+4;
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x = pad-(Math.round(this.cell[0] * scale/2 * column + radius) + 15 - (column*4));
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this.ctx.beginPath();
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this.setColor(color, 0.25, 0.75);
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this.ctx.arc(x, y, radius, 0, Math.PI * 2, true);
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this.ctx.fill();
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idx++;
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}
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}
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}
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