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Location: kallithea/rhodecode/public/js/graph.js
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follow Python conventions for boolean values
True and False might be singletons and the "default" values for "boolean"
expressions, but "all" values in Python has a boolean value and should be
evaluated as such. Checking with 'is True' and 'is False' is thus confusing,
error prone and unnessarily complex.
If we anywhere rely and nullable boolean fields from the database layer and
don't want the null value to be treated as False then we should check
explicitly for null with 'is None'.
True and False might be singletons and the "default" values for "boolean"
expressions, but "all" values in Python has a boolean value and should be
evaluated as such. Checking with 'is True' and 'is False' is thus confusing,
error prone and unnessarily complex.
If we anywhere rely and nullable boolean fields from the database layer and
don't want the null value to be treated as False then we should check
explicitly for null with 'is None'.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | // branch_renderer.js - Rendering of branch DAGs on the client side
//
// Copyright 2010 Marcin Kuzminski <marcin AT python-works DOT com>
// Copyright 2008 Jesper Noehr <jesper AT noehr DOT org>
// Copyright 2008 Dirkjan Ochtman <dirkjan AT ochtman DOT nl>
// Copyright 2006 Alexander Schremmer <alex AT alexanderweb DOT de>
//
// derived from code written by Scott James Remnant <scott@ubuntu.com>
// Copyright 2005 Canonical Ltd.
//
// This software may be used and distributed according to the terms
// of the GNU General Public License, incorporated herein by reference.
var colors = [
[ 1.0, 0.0, 0.0 ],
[ 1.0, 1.0, 0.0 ],
[ 0.0, 1.0, 0.0 ],
[ 0.0, 1.0, 1.0 ],
[ 0.0, 0.0, 1.0 ],
[ 1.0, 0.0, 1.0 ],
[ 1.0, 1.0, 0.0 ],
[ 0.0, 0.0, 0.0 ]
];
function BranchRenderer() {
this.canvas = document.getElementById("graph_canvas");
if (!document.createElement("canvas").getContext)
this.canvas = window.G_vmlCanvasManager.initElement(this.canvas);
this.ctx = this.canvas.getContext('2d');
this.ctx.strokeStyle = 'rgb(0, 0, 0)';
this.ctx.fillStyle = 'rgb(0, 0, 0)';
this.cur = [0, 0];
this.line_width = 2.0;
this.dot_radius = 3.5;
this.setColor = function(color, bg, fg) {
color %= colors.length;
var red = (colors[color][0] * fg) || bg;
var green = (colors[color][1] * fg) || bg;
var blue = (colors[color][2] * fg) || bg;
red = Math.round(red * 255);
green = Math.round(green * 255);
blue = Math.round(blue * 255);
var s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
this.ctx.strokeStyle = s;
this.ctx.fillStyle = s;
}
this.render = function(data,canvasWidth,lineCount) {
var idx = 1;
var rela = document.getElementById('graph');
if (lineCount == 0)
lineCount = 1;
var edge_pad = this.dot_radius + 2;
var box_size = Math.min(18, Math.floor((canvasWidth - edge_pad*2)/(lineCount)));
var base_x = canvasWidth - edge_pad;
for (var i in data) {
var row = document.getElementById("chg_"+idx);
if (row == null)
continue;
var next = document.getElementById("chg_"+(idx+1));
var extra = 0;
cur = data[i];
node = cur[1];
in_l = cur[2];
var rowY = row.offsetTop + row.offsetHeight/2 - rela.offsetTop;
var nextY = (next == null) ? rowY + row.offsetHeight/2 : next.offsetTop + next.offsetHeight/2 - rela.offsetTop;
for (var j in in_l) {
line = in_l[j];
start = line[0];
end = line[1];
color = line[2];
this.setColor(color, 0.0, 0.65);
x = base_x - box_size * start;
this.ctx.lineWidth=this.line_width;
this.ctx.beginPath();
this.ctx.moveTo(x, rowY);
if (start == end)
{
this.ctx.lineTo(x,nextY+extra,3);
}
else
{
var x2 = base_x - box_size * end;
var ymid = (rowY+nextY) / 2;
this.ctx.bezierCurveTo (x,ymid,x2,ymid,x2,nextY);
}
this.ctx.stroke();
}
column = node[0];
color = node[1];
radius = this.dot_radius;
x = base_x - box_size * column;
this.ctx.beginPath();
this.setColor(color, 0.25, 0.75);
this.ctx.arc(x, rowY, radius, 0, Math.PI * 2, true);
this.ctx.fill();
idx++;
}
}
}
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