gitphp 0.2.9.1 :: busui.git/blobdiff

/**

* This code is released to the public domain by Jim Studt, 2007.

* He may keep some sort of up to date copy at http://www.federated.com/~jim/canvastext/

* A partial support for accentuated letters as been added too.

*/

var CanvasText = {

/** The letters definition. It is a list of letters,

* with their width, and the coordinates of points compositing them.

* The syntax for the points is : [x, y], null value means "pen up"

*/

letters: {

'\n':{ width: -1, points: [] },

' ': { width: 10, points: [] },

'!': { width: 10, points: [[5,21],[5,7],null,[5,2],[4,1],[5,0],[6,1],[5,2]] },

'"': { width: 16, points: [[4,21],[4,14],null,[12,21],[12,14]] },

'#': { width: 21, points: [[11,25],[4,-7],null,[17,25],[10,-7],null,[4,12],[18,12],null,[3,6],[17,6]] },

'$': { width: 20, points: [[8,25],[8,-4],null,[12,25],[12,-4],null,[17,18],[15,20],[12,21],[8,21],[5,20],[3,18],[3,16],[4,14],[5,13],[7,12],[13,10],[15,9],[16,8],[17,6],[17,3],[15,1],[12,0],[8,0],[5,1],[3,3]] },

'%': { width: 24, points: [[21,21],[3,0],null,[8,21],[10,19],[10,17],[9,15],[7,14],[5,14],[3,16],[3,18],[4,20],[6,21],[8,21],null,[17,7],[15,6],[14,4],[14,2],[16,0],[18,0],[20,1],[21,3],[21,5],[19,7],[17,7]] },

'&': { width: 26, points: [[23,12],[23,13],[22,14],[21,14],[20,13],[19,11],[17,6],[15,3],[13,1],[11,0],[7,0],[5,1],[4,2],[3,4],[3,6],[4,8],[5,9],[12,13],[13,14],[14,16],[14,18],[13,20],[11,21],[9,20],[8,18],[8,16],[9,13],[11,10],[16,3],[18,1],[20,0],[22,0],[23,1],[23,2]] },

'\'':{ width: 10, points: [[5,19],[4,20],[5,21],[6,20],[6,18],[5,16],[4,15]] },

'(': { width: 14, points: [[11,25],[9,23],[7,20],[5,16],[4,11],[4,7],[5,2],[7,-2],[9,-5],[11,-7]] },

')': { width: 14, points: [[3,25],[5,23],[7,20],[9,16],[10,11],[10,7],[9,2],[7,-2],[5,-5],[3,-7]] },

'*': { width: 16, points: [[8,21],[8,9],null,[3,18],[13,12],null,[13,18],[3,12]] },

'+': { width: 26, points: [[13,18],[13,0],null,[4,9],[22,9]] },

',': { width: 10, points: [[6,1],[5,0],[4,1],[5,2],[6,1],[6,-1],[5,-3],[4,-4]] },

'-': { width: 26, points: [[4,9],[22,9]] },

'.': { width: 10, points: [[5,2],[4,1],[5,0],[6,1],[5,2]] },

'/': { width: 22, points: [[20,25],[2,-7]] },

'0': { width: 20, points: [[9,21],[6,20],[4,17],[3,12],[3,9],[4,4],[6,1],[9,0],[11,0],[14,1],[16,4],[17,9],[17,12],[16,17],[14,20],[11,21],[9,21]] },

'1': { width: 20, points: [[6,17],[8,18],[11,21],[11,0]] },

'2': { width: 20, points: [[4,16],[4,17],[5,19],[6,20],[8,21],[12,21],[14,20],[15,19],[16,17],[16,15],[15,13],[13,10],[3,0],[17,0]] },

'3': { width: 20, points: [[5,21],[16,21],[10,13],[13,13],[15,12],[16,11],[17,8],[17,6],[16,3],[14,1],[11,0],[8,0],[5,1],[4,2],[3,4]] },

'4': { width: 20, points: [[13,21],[3,7],[18,7],null,[13,21],[13,0]] },

'5': { width: 20, points: [[15,21],[5,21],[4,12],[5,13],[8,14],[11,14],[14,13],[16,11],[17,8],[17,6],[16,3],[14,1],[11,0],[8,0],[5,1],[4,2],[3,4]] },

'6': { width: 20, points: [[16,18],[15,20],[12,21],[10,21],[7,20],[5,17],[4,12],[4,7],[5,3],[7,1],[10,0],[11,0],[14,1],[16,3],[17,6],[17,7],[16,10],[14,12],[11,13],[10,13],[7,12],[5,10],[4,7]] },

'7': { width: 20, points: [[17,21],[7,0],null,[3,21],[17,21]] },

'8': { width: 20, points: [[8,21],[5,20],[4,18],[4,16],[5,14],[7,13],[11,12],[14,11],[16,9],[17,7],[17,4],[16,2],[15,1],[12,0],[8,0],[5,1],[4,2],[3,4],[3,7],[4,9],[6,11],[9,12],[13,13],[15,14],[16,16],[16,18],[15,20],[12,21],[8,21]] },

'9': { width: 20, points: [[16,14],[15,11],[13,9],[10,8],[9,8],[6,9],[4,11],[3,14],[3,15],[4,18],[6,20],[9,21],[10,21],[13,20],[15,18],[16,14],[16,9],[15,4],[13,1],[10,0],[8,0],[5,1],[4,3]] },

':': { width: 10, points: [[5,14],[4,13],[5,12],[6,13],[5,14],null,[5,2],[4,1],[5,0],[6,1],[5,2]] },

';': { width: 10, points: [[5,14],[4,13],[5,12],[6,13],[5,14],null,[6,1],[5,0],[4,1],[5,2],[6,1],[6,-1],[5,-3],[4,-4]] },

'<': { width: 24, points: [[20,18],[4,9],[20,0]] },

'=': { width: 26, points: [[4,12],[22,12],null,[4,6],[22,6]] },

'>': { width: 24, points: [[4,18],[20,9],[4,0]] },

'?': { width: 18, points: [[3,16],[3,17],[4,19],[5,20],[7,21],[11,21],[13,20],[14,19],[15,17],[15,15],[14,13],[13,12],[9,10],[9,7],null,[9,2],[8,1],[9,0],[10,1],[9,2]] },

'@': { width: 27, points: [[18,13],[17,15],[15,16],[12,16],[10,15],[9,14],[8,11],[8,8],[9,6],[11,5],[14,5],[16,6],[17,8],null,[12,16],[10,14],[9,11],[9,8],[10,6],[11,5],null,[18,16],[17,8],[17,6],[19,5],[21,5],[23,7],[24,10],[24,12],[23,15],[22,17],[20,19],[18,20],[15,21],[12,21],[9,20],[7,19],[5,17],[4,15],[3,12],[3,9],[4,6],[5,4],[7,2],[9,1],[12,0],[15,0],[18,1],[20,2],[21,3],null,[19,16],[18,8],[18,6],[19,5]] },

'A': { width: 18, points: [[9,21],[1,0],null,[9,21],[17,0],null,[4,7],[14,7]] },

'B': { width: 21, points: [[4,21],[4,0],null,[4,21],[13,21],[16,20],[17,19],[18,17],[18,15],[17,13],[16,12],[13,11],null,[4,11],[13,11],[16,10],[17,9],[18,7],[18,4],[17,2],[16,1],[13,0],[4,0]] },

'C': { width: 21, points: [[18,16],[17,18],[15,20],[13,21],[9,21],[7,20],[5,18],[4,16],[3,13],[3,8],[4,5],[5,3],[7,1],[9,0],[13,0],[15,1],[17,3],[18,5]] },

'D': { width: 21, points: [[4,21],[4,0],null,[4,21],[11,21],[14,20],[16,18],[17,16],[18,13],[18,8],[17,5],[16,3],[14,1],[11,0],[4,0]] },

'E': { width: 19, points: [[4,21],[4,0],null,[4,21],[17,21],null,[4,11],[12,11],null,[4,0],[17,0]] },

'F': { width: 18, points: [[4,21],[4,0],null,[4,21],[17,21],null,[4,11],[12,11]] },

'G': { width: 21, points: [[18,16],[17,18],[15,20],[13,21],[9,21],[7,20],[5,18],[4,16],[3,13],[3,8],[4,5],[5,3],[7,1],[9,0],[13,0],[15,1],[17,3],[18,5],[18,8],null,[13,8],[18,8]] },

'H': { width: 22, points: [[4,21],[4,0],null,[18,21],[18,0],null,[4,11],[18,11]] },

'I': { width: 8, points: [[4,21],[4,0]] },

'J': { width: 16, points: [[12,21],[12,5],[11,2],[10,1],[8,0],[6,0],[4,1],[3,2],[2,5],[2,7]] },

'K': { width: 21, points: [[4,21],[4,0],null,[18,21],[4,7],null,[9,12],[18,0]] },

'L': { width: 17, points: [[4,21],[4,0],null,[4,0],[16,0]] },

'M': { width: 24, points: [[4,21],[4,0],null,[4,21],[12,0],null,[20,21],[12,0],null,[20,21],[20,0]] },

'N': { width: 22, points: [[4,21],[4,0],null,[4,21],[18,0],null,[18,21],[18,0]] },

'O': { width: 22, points: [[9,21],[7,20],[5,18],[4,16],[3,13],[3,8],[4,5],[5,3],[7,1],[9,0],[13,0],[15,1],[17,3],[18,5],[19,8],[19,13],[18,16],[17,18],[15,20],[13,21],[9,21]] },

'P': { width: 21, points: [[4,21],[4,0],null,[4,21],[13,21],[16,20],[17,19],[18,17],[18,14],[17,12],[16,11],[13,10],[4,10]] },

'Q': { width: 22, points: [[9,21],[7,20],[5,18],[4,16],[3,13],[3,8],[4,5],[5,3],[7,1],[9,0],[13,0],[15,1],[17,3],[18,5],[19,8],[19,13],[18,16],[17,18],[15,20],[13,21],[9,21],null,[12,4],[18,-2]] },

'R': { width: 21, points: [[4,21],[4,0],null,[4,21],[13,21],[16,20],[17,19],[18,17],[18,15],[17,13],[16,12],[13,11],[4,11],null,[11,11],[18,0]] },

'S': { width: 20, points: [[17,18],[15,20],[12,21],[8,21],[5,20],[3,18],[3,16],[4,14],[5,13],[7,12],[13,10],[15,9],[16,8],[17,6],[17,3],[15,1],[12,0],[8,0],[5,1],[3,3]] },

'T': { width: 16, points: [[8,21],[8,0],null,[1,21],[15,21]] },

'U': { width: 22, points: [[4,21],[4,6],[5,3],[7,1],[10,0],[12,0],[15,1],[17,3],[18,6],[18,21]] },

'V': { width: 18, points: [[1,21],[9,0],null,[17,21],[9,0]] },

'W': { width: 24, points: [[2,21],[7,0],null,[12,21],[7,0],null,[12,21],[17,0],null,[22,21],[17,0]] },

'X': { width: 20, points: [[3,21],[17,0],null,[17,21],[3,0]] },

'Y': { width: 18, points: [[1,21],[9,11],[9,0],null,[17,21],[9,11]] },

'Z': { width: 20, points: [[17,21],[3,0],null,[3,21],[17,21],null,[3,0],[17,0]] },

'[': { width: 14, points: [[4,25],[4,-7],null,[5,25],[5,-7],null,[4,25],[11,25],null,[4,-7],[11,-7]] },

'\\':{ width: 14, points: [[0,21],[14,-3]] },

']': { width: 14, points: [[9,25],[9,-7],null,[10,25],[10,-7],null,[3,25],[10,25],null,[3,-7],[10,-7]] },

'^': { width: 14, points: [[3,10],[8,18],[13,10]] },

'_': { width: 16, points: [[0,-2],[16,-2]] },

'`': { width: 10, points: [[6,21],[5,20],[4,18],[4,16],[5,15],[6,16],[5,17]] },

'a': { width: 19, points: [[15,14],[15,0],null,[15,11],[13,13],[11,14],[8,14],[6,13],[4,11],[3,8],[3,6],[4,3],[6,1],[8,0],[11,0],[13,1],[15,3]] },

'b': { width: 19, points: [[4,21],[4,0],null,[4,11],[6,13],[8,14],[11,14],[13,13],[15,11],[16,8],[16,6],[15,3],[13,1],[11,0],[8,0],[6,1],[4,3]] },

'c': { width: 18, points: [[15,11],[13,13],[11,14],[8,14],[6,13],[4,11],[3,8],[3,6],[4,3],[6,1],[8,0],[11,0],[13,1],[15,3]] },

'd': { width: 19, points: [[15,21],[15,0],null,[15,11],[13,13],[11,14],[8,14],[6,13],[4,11],[3,8],[3,6],[4,3],[6,1],[8,0],[11,0],[13,1],[15,3]] },

'e': { width: 18, points: [[3,8],[15,8],[15,10],[14,12],[13,13],[11,14],[8,14],[6,13],[4,11],[3,8],[3,6],[4,3],[6,1],[8,0],[11,0],[13,1],[15,3]] },

'f': { width: 12, points: [[10,21],[8,21],[6,20],[5,17],[5,0],null,[2,14],[9,14]] },

'g': { width: 19, points: [[15,14],[15,-2],[14,-5],[13,-6],[11,-7],[8,-7],[6,-6],null,[15,11],[13,13],[11,14],[8,14],[6,13],[4,11],[3,8],[3,6],[4,3],[6,1],[8,0],[11,0],[13,1],[15,3]] },

'h': { width: 19, points: [[4,21],[4,0],null,[4,10],[7,13],[9,14],[12,14],[14,13],[15,10],[15,0]] },

'i': { width: 8, points: [[3,21],[4,20],[5,21],[4,22],[3,21],null,[4,14],[4,0]] },

'j': { width: 10, points: [[5,21],[6,20],[7,21],[6,22],[5,21],null,[6,14],[6,-3],[5,-6],[3,-7],[1,-7]] },

'k': { width: 17, points: [[4,21],[4,0],null,[14,14],[4,4],null,[8,8],[15,0]] },

'l': { width: 8, points: [[4,21],[4,0]] },

'm': { width: 30, points: [[4,14],[4,0],null,[4,10],[7,13],[9,14],[12,14],[14,13],[15,10],[15,0],null,[15,10],[18,13],[20,14],[23,14],[25,13],[26,10],[26,0]] },

'n': { width: 19, points: [[4,14],[4,0],null,[4,10],[7,13],[9,14],[12,14],[14,13],[15,10],[15,0]] },

'o': { width: 19, points: [[8,14],[6,13],[4,11],[3,8],[3,6],[4,3],[6,1],[8,0],[11,0],[13,1],[15,3],[16,6],[16,8],[15,11],[13,13],[11,14],[8,14]] },

'p': { width: 19, points: [[4,14],[4,-7],null,[4,11],[6,13],[8,14],[11,14],[13,13],[15,11],[16,8],[16,6],[15,3],[13,1],[11,0],[8,0],[6,1],[4,3]] },

'q': { width: 19, points: [[15,14],[15,-7],null,[15,11],[13,13],[11,14],[8,14],[6,13],[4,11],[3,8],[3,6],[4,3],[6,1],[8,0],[11,0],[13,1],[15,3]] },

'r': { width: 13, points: [[4,14],[4,0],null,[4,8],[5,11],[7,13],[9,14],[12,14]] },

's': { width: 17, points: [[14,11],[13,13],[10,14],[7,14],[4,13],[3,11],[4,9],[6,8],[11,7],[13,6],[14,4],[14,3],[13,1],[10,0],[7,0],[4,1],[3,3]] },

't': { width: 12, points: [[5,21],[5,4],[6,1],[8,0],[10,0],null,[2,14],[9,14]] },

'u': { width: 19, points: [[4,14],[4,4],[5,1],[7,0],[10,0],[12,1],[15,4],null,[15,14],[15,0]] },

'v': { width: 16, points: [[2,14],[8,0],null,[14,14],[8,0]] },

'w': { width: 22, points: [[3,14],[7,0],null,[11,14],[7,0],null,[11,14],[15,0],null,[19,14],[15,0]] },

'x': { width: 17, points: [[3,14],[14,0],null,[14,14],[3,0]] },

'y': { width: 16, points: [[2,14],[8,0],null,[14,14],[8,0],[6,-4],[4,-6],[2,-7],[1,-7]] },

'z': { width: 17, points: [[14,14],[3,0],null,[3,14],[14,14],null,[3,0],[14,0]] },

'{': { width: 14, points: [[9,25],[7,24],[6,23],[5,21],[5,19],[6,17],[7,16],[8,14],[8,12],[6,10],null,[7,24],[6,22],[6,20],[7,18],[8,17],[9,15],[9,13],[8,11],[4,9],[8,7],[9,5],[9,3],[8,1],[7,0],[6,-2],[6,-4],[7,-6],null,[6,8],[8,6],[8,4],[7,2],[6,1],[5,-1],[5,-3],[6,-5],[7,-6],[9,-7]] },

'|': { width: 8, points: [[4,25],[4,-7]] },

'}': { width: 14, points: [[5,25],[7,24],[8,23],[9,21],[9,19],[8,17],[7,16],[6,14],[6,12],[8,10],null,[7,24],[8,22],[8,20],[7,18],[6,17],[5,15],[5,13],[6,11],[10,9],[6,7],[5,5],[5,3],[6,1],[7,0],[8,-2],[8,-4],[7,-6],null,[8,8],[6,6],[6,4],[7,2],[8,1],[9,-1],[9,-3],[8,-5],[7,-6],[5,-7]] },

'~': { width: 24, points: [[3,6],[3,8],[4,11],[6,12],[8,12],[10,11],[14,8],[16,7],[18,7],[20,8],[21,10],null,[3,8],[4,10],[6,11],[8,11],[10,10],[14,7],[16,6],[18,6],[20,7],[21,10],[21,12]] },

},

specialchars: {

'pi': { width: 19, points: [[6,14],[6,0],null,[14,14],[14,0],null,[2,13],[6,16],[13,13],[17,16]] }

},

/** Diacritics, used to draw accentuated letters */

diacritics: {

'`': { entity: 'grave', points: [[7,22],[12,19]] },

'^': { entity: 'circ', points: [[5.5,19],[9.5,23],[12.5,19]] },

'~': { entity: 'tilde', points: [[4,18],[7,22],[10,18],[13,22]] }

},

/** The default font styling */

style: {

size: 8, // font height in pixels

font: null, // not yet implemented

color: '#000000', //

weight: 1, // float, 1 for 'normal'

halign: 'l', // l: left, r: right, c: center

valign: 'b', // t: top, m: middle, b: bottom

adjustAlign: false, // modifies the alignments if the angle is different from 0 to make the spin point always at the good position

angle: 0, // in radians, anticlockwise

tracking: 1, // space between the letters, float, 1 for 'normal'

boundingBoxColor: '#ff0000', //null // color of the bounding box (null to hide), can be used for debug and font drawing

originPointColor: '#000000' //null // color of the bounding box (null to hide), can be used for debug and font drawing

},

debug: false,

_bufferLexemes: {},

/** Get the letter data corresponding to a char

* @param {String} ch - The char

*/

letter: function(ch) {

return CanvasText.letters[ch];

},

parseLexemes: function(str) {

if (CanvasText._bufferLexemes[str])

return CanvasText._bufferLexemes[str];

var i, c, matches = str.match(/&[A-Za-z]{2,5};|\s|./g);

var result = [], chars = [];

for (i = 0; i < matches.length; i++) {

c = matches[i];

if (c.length == 1)

chars.push(c);

else {

var entity = c.substring(1, c.length-1);

if (CanvasText.specialchars[entity])

chars.push(entity);

else

chars = chars.concat(c.toArray());

}

for (i = 0; i < chars.length; i++) {

c = chars[i];

if (c = CanvasText.letters[c] || CanvasText.specialchars[c])

result.push(c);

}

return CanvasText._bufferLexemes[str] = result.compact();

},

/** Get the font ascent for a given style

* @param {Object} style - The reference style

*/

ascent: function(style) {

style = style || {};

return (style.size || CanvasText.style.size);

},

/** Get the font descent for a given style

* @param {Object} style - The reference style

* */

descent: function(style) {

style = style || {};

return 7.0*(style.size || CanvasText.style.size)/25.0;

},

/** Measure the text horizontal size

* @param {String} str - The text

* @param {Object} style - Text style

* */

measure: function(str, style) {

if (!str) return;

style = style || {};

var i, width, lexemes = CanvasText.parseLexemes(str),

total = 0;

for (i = lexemes.length-1; i > -1; --i) {

c = lexemes[i];

width = (c.diacritic) ? CanvasText.letter(c.letter).width : c.width;

total += width * (style.tracking || CanvasText.style.tracking) * (style.size || CanvasText.style.size) / 25.0;

}

return total;

},

getDimensions: function(str, style) {

var width = CanvasText.measure(str, style),

height = style.size || CanvasText.style.size,

angle = style.angle || CanvasText.style.angle;

if (style.angle == 0) return {width: width, height: height};

return {

width: Math.abs(Math.cos(angle) * width) + Math.abs(Math.sin(angle) * height),

height: Math.abs(Math.sin(angle) * width) + Math.abs(Math.cos(angle) * height)

}

},

getBestAlign: function(angle, style) {

angle += CanvasText.getAngleFromAlign(style.halign, style.valign);

var a = {h:'c', v:'m'};

if (Math.round(Math.cos(angle)*1000)/1000 != 0)

a.h = (Math.cos(angle) > 0 ? 'r' : 'l');

if (Math.round(Math.sin(angle)*1000)/1000 != 0)

a.v = (Math.sin(angle) > 0 ? 't' : 'b');

return a;

},

getAngleFromAlign: function(halign, valign) {

var pi = Math.PI, table = {

'rm': 0,

'rt': pi/4,

'ct': pi/2,

'lt': 3*(pi/4),

'lm': pi,

'lb': -3*(pi/4),

'cb': -pi/2,

'rb': -pi/4,

'cm': 0

}

return table[halign+valign];

},

/** Draws serie of points at given coordinates

* @param {Canvas context} ctx - The canvas context

* @param {Array} points - The points to draw

* @param {Number} x - The X coordinate

* @param {Number} y - The Y coordinate

* @param {Number} mag - The scale

*/

drawPoints: function (ctx, points, x, y, mag, offset) {

var i, a, penUp = true, needStroke = 0;

offset = offset || {x:0, y:0};

ctx.beginPath();

for (i = 0; i < points.length; i++) {

a = points[i];

if (!a) {

penUp = true;

continue;

}

if (penUp) {

ctx.moveTo(x + a[0]*mag + offset.x, y - a[1]*mag + offset.y);

penUp = false;

}

else {

ctx.lineTo(x + a[0]*mag + offset.x, y - a[1]*mag + offset.y);

}

ctx.stroke();

},

/** Draws a text at given coordinates and with a given style

* @param {Canvas context} ctx - The canvas context

* @param {String} str - The text to draw

* @param {Number} xOrig - The X coordinate

* @param {Number} yOrig - The Y coordinate

* @param {Object} style - The font style

*/

draw: function(ctx, str, xOrig, yOrig, style) {

if (!str) return;

style = style || CanvasText.style;

style.halign = style.halign || CanvasText.style.halign;

style.valign = style.valign || CanvasText.style.valign;

style.angle = style.angle || CanvasText.style.angle;

style.size = style.size || CanvasText.style.size;

style.adjustAlign = style.adjustAlign || CanvasText.style.adjustAlign;

var i, c, total = 0,

mag = style.size / 25.0,

x = 0, y = 0,

lexemes = CanvasText.parseLexemes(str);

var offset = {x:0, y:0},

measure = CanvasText.measure(str, style),

align;

if (style.adjustAlign) {

align = CanvasText.getBestAlign(style.angle, style);

style.halign = align.h;

style.valign = align.v;

}

switch (style.halign) {