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1 // branch_renderer.js - Rendering of branch DAGs on the client side |
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2 // |
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3 // Copyright 2008 Dirkjan Ochtman <dirkjan AT ochtman DOT nl> |
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4 // Copyright 2006 Alexander Schremmer <alex AT alexanderweb DOT de> |
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5 // |
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6 // derived from code written by Scott James Remnant <scott@ubuntu.com> |
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7 // Copyright 2005 Canonical Ltd. |
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8 // |
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9 // This software may be used and distributed according to the terms |
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10 // of the GNU General Public License, incorporated herein by reference. |
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11 |
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12 var colors = [ |
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13 [ 1.0, 0.0, 0.0 ], |
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14 [ 1.0, 1.0, 0.0 ], |
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15 [ 0.0, 1.0, 0.0 ], |
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16 [ 0.0, 1.0, 1.0 ], |
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17 [ 0.0, 0.0, 1.0 ], |
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18 [ 1.0, 0.0, 1.0 ] |
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19 ]; |
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20 |
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21 function Graph() { |
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22 |
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23 this.canvas = document.getElementById('graph'); |
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24 if (navigator.userAgent.indexOf('MSIE') >= 0) this.canvas = window.G_vmlCanvasManager.initElement(this.canvas); |
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25 this.ctx = this.canvas.getContext('2d'); |
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26 this.ctx.strokeStyle = 'rgb(0, 0, 0)'; |
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27 this.ctx.fillStyle = 'rgb(0, 0, 0)'; |
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28 this.cur = [0, 0]; |
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29 this.line_width = 3; |
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30 this.bg = [0, 4]; |
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31 this.cell = [2, 0]; |
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32 this.columns = 0; |
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33 this.revlink = ''; |
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34 |
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35 this.scale = function(height) { |
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36 this.bg_height = height; |
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37 this.box_size = Math.floor(this.bg_height / 1.2); |
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38 this.cell_height = this.box_size; |
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39 } |
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40 |
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41 function colorPart(num) { |
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42 num *= 255 |
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43 num = num < 0 ? 0 : num; |
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44 num = num > 255 ? 255 : num; |
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45 var digits = Math.round(num).toString(16); |
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46 if (num < 16) { |
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47 return '0' + digits; |
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48 } else { |
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49 return digits; |
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50 } |
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51 } |
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52 |
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53 this.setColor = function(color, bg, fg) { |
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54 |
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55 // Set the colour. |
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56 // |
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57 // Picks a distinct colour based on an internal wheel; the bg |
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58 // parameter provides the value that should be assigned to the 'zero' |
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59 // colours and the fg parameter provides the multiplier that should be |
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60 // applied to the foreground colours. |
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61 |
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62 color %= colors.length; |
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63 var red = (colors[color][0] * fg) || bg; |
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64 var green = (colors[color][1] * fg) || bg; |
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65 var blue = (colors[color][2] * fg) || bg; |
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66 red = Math.round(red * 255); |
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67 green = Math.round(green * 255); |
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68 blue = Math.round(blue * 255); |
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69 var s = 'rgb(' + red + ', ' + green + ', ' + blue + ')'; |
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70 this.ctx.strokeStyle = s; |
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71 this.ctx.fillStyle = s; |
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72 return s; |
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73 |
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74 } |
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75 |
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76 this.render = function(data) { |
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77 |
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78 var backgrounds = ''; |
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79 var nodedata = ''; |
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80 |
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81 for (var i in data) { |
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82 |
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83 var parity = i % 2; |
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84 this.cell[1] += this.bg_height; |
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85 this.bg[1] += this.bg_height; |
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86 |
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87 var cur = data[i]; |
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88 var node = cur[1]; |
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89 var edges = cur[2]; |
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90 var fold = false; |
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91 |
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92 for (var j in edges) { |
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93 |
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94 line = edges[j]; |
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95 start = line[0]; |
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96 end = line[1]; |
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97 color = line[2]; |
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98 |
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99 if (end > this.columns || start > this.columns) { |
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100 this.columns += 1; |
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101 } |
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102 |
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103 if (start == this.columns && start > end) { |
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104 var fold = true; |
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105 } |
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106 |
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107 x0 = this.cell[0] + this.box_size * start + this.box_size / 2; |
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108 y0 = this.bg[1] - this.bg_height / 2; |
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109 x1 = this.cell[0] + this.box_size * end + this.box_size / 2; |
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110 y1 = this.bg[1] + this.bg_height / 2; |
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111 |
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112 this.edge(x0, y0, x1, y1, color); |
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113 |
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114 } |
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115 |
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116 // Draw the revision node in the right column |
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117 |
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118 column = node[0] |
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119 color = node[1] |
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120 |
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121 radius = this.box_size / 8; |
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122 x = this.cell[0] + this.box_size * column + this.box_size / 2; |
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123 y = this.bg[1] - this.bg_height / 2; |
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124 var add = this.vertex(x, y, color, parity, cur); |
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125 backgrounds += add[0]; |
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126 nodedata += add[1]; |
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127 |
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128 if (fold) this.columns -= 1; |
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129 |
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130 } |
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131 |
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132 document.getElementById('nodebgs').innerHTML += backgrounds; |
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133 document.getElementById('graphnodes').innerHTML += nodedata; |
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134 |
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135 } |
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136 |
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137 } |