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fontviewer.js
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(function() {
function $(id) {
return document.getElementById(id);
}
var FontViewer = {
handleFiles: function(e) {
var file = this.files[0];
if(file && file.type === 'image/svg+xml') {
FontViewer.information('Viewing <i>"'+file.name+'</i>".');
// Clean up
$('glyphs').innerHTML = '';
FontViewer.glyphs = {};
var fileReader = new FileReader(), parser, source;
fileReader.onload = function(event) {
try {
if(window.DOMParser) {
parser = new DOMParser();
source = parser.parseFromString(event.target.result, 'text/xml');
} else {
source = new ActiveXObject("Microsoft.XMLDOM");
source.async = 'false';
source.loadXML(event.target.result);
}
} catch(e) {
FontViewer.information('Invalid SVG font file', true);
}
FontViewer.parseSVGFont(source.getElementsByTagName('svg')[0]);
};
source = fileReader.readAsText(file, 'utf-8');
} else {
FontViewer.information('None or invalid file selected', true);
}
},
information: function(str, error) {
$('information').className = (error) ? 'error' : '';
$('information').innerHTML = str;
},
parseSVGFont: function(svg) {
var meta = svg.getElementsByTagName('metadata')[0];
if(meta) {
$('fontMetadata').innerHTML = meta.textContent.replace('\n', '<br />');
}
var fontInfo = svg.getElementsByTagName('font-face')[0], font = svg.getElementsByTagName('font')[0];
if(fontInfo && fontInfo.getAttribute('font-family')) {
$('fontName').innerHTML = fontInfo.getAttribute('font-family');
} else if(font && font.getAttribute('id')) {
$('fontName').innerHTML = font.getAttribute('id');
}
var glyphs = svg.getElementsByTagName('glyph');
for(var i = 0, length = glyphs.length; i < length; i++) { // TEST
FontViewer.showGlyph(glyphs[i]);
}
},
showGlyph: function(glyph) {
var container = document.createElement('div');
var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
var path = document.createElementNS("http://www.w3.org/2000/svg", "path");
var line = glyph.getAttribute('d'), glyphName, horizAdvance = parseFloat(glyph.getAttribute('horiz-adv-x')), bbox, max;
if(!line) return;
bbox = FontViewer.getPathBoundingBox(line);
max = Math.max(bbox.height, bbox.width);
FontViewer.bbox = bbox;
path.setAttribute('d', line);
path.setAttribute('stroke', 'black');
path.setAttribute('transform', 'scale('+(FontViewer.settings.glyphSize.width/max)+', -'+Math.abs(FontViewer.settings.glyphSize.width/max)+') '+
'translate('+(0-bbox.x.min)+', -'+Math.abs(0-bbox.y.min-bbox.height)+')');
svg.appendChild(path);
svg.setAttribute('width', FontViewer.settings.glyphSize.width+'px');
svg.setAttribute('height', FontViewer.settings.glyphSize.height+'px');
svg.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
glyphName = String(glyph.getAttribute('glyph-name'));
FontViewer.glyphs[glyphName] = {name: glyphName, path: line, hoz: horizAdvance};
container.className = 'fontViewer_'+glyphName;
if(glyphName.length > 12) {
glyphName = glyphName.substring(0, 9) + '...';
}
container.innerHTML = '<span>'+glyphName+"</span>";
container.appendChild(svg);
container.addEventListener('click', function() {
FontViewer.modalGlyph(this.className.split('fontViewer_')[1]);
}, false);
$('glyphs').appendChild(container);
},
modalGlyph: function(glyphName) {
console && console.log("Modal show: ", glyphName);
var glyph = FontViewer.glyphs[glyphName];
if(!glyph) {
return false;
}
function correctPositions() {
modalBackground.style.top = window.pageYOffset + 'px';
modal.style.left = window.innerWidth/2 - FontViewer.settings.modalSize.width/2 + 'px';
modal.style.top = window.pageYOffset + 30 + 'px';
}
var modal = $('modal'), modalBackground = $('modalBackground'), bbox = FontViewer.getPathBoundingBox(glyph.path), max;
max = Math.max(bbox.height, bbox.width);
modal.innerHTML = '<h2 id="modalGlyphName"></h2>';
modalBackground.style.display = 'block';
modalBackground.addEventListener('click', function() {
this.style.display = 'none';
modal.style.display = 'none';
window.removeEventListener('scroll', correctPositions, false);
}, false);
window.addEventListener('scroll', correctPositions, false);
$('modalGlyphName').innerHTML = glyph.name;
var path = document.createElementNS("http://www.w3.org/2000/svg", "path");
var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
svg.setAttribute('width', FontViewer.settings.modalSize.width+'px');
svg.setAttribute('height', FontViewer.settings.modalSize.height+'px');
svg.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
path.setAttribute('d', glyph.path);
path.setAttribute('stroke', 'black');
path.setAttribute('transform', 'scale('+(FontViewer.settings.modalSize.width/max)+', -'+Math.abs(FontViewer.settings.modalSize.width/max)+') '+
'translate('+(0-bbox.x.min)+', -'+Math.abs(0-bbox.y.min-bbox.height)+')');
svg.appendChild(path);
modal.appendChild(svg);
correctPositions();
modal.style.display = 'block';
},
getPathBoundingBox: function(path) {
var position = {x: null, y: null, beginX: null, beginY: null}, bbox = {x: {max: null, min: null}, y: {max: null, min: null}}, bit, arrayPath = [];
path = path.split(/([mlthvzcsqa]|\s)/ig);
// Clean up
for(var i = 0, length = path.length; i < length; i++) {
bit = path[i].trim();
if(bit === '') continue;
arrayPath.push(bit);
}
path = arrayPath;
for(i = 0, length = path.length; i < length; i++) {
bit = path[i].trim();
switch(bit) {
case 'M': {
position.x = parseFloat(path[++i]);
position.y = parseFloat(path[++i]);
if(i === 2) { // Begin
position.beginX = parseFloat(path[i-1]);
position.beginY = parseFloat(path[i]);
}
} break;
case 'L':
case 'T': {
position.x = parseFloat(path[++i]);
position.y = parseFloat(path[++i]);
} break;
case 'm':
case 'l':
case 't': {
position.x += parseFloat(path[++i]);
position.y += parseFloat(path[++i]);
} break;
case 'H': {
position.x = parseFloat(path[++i]);
} break;
case 'h': {
position.x += parseFloat(path[++i]);
} break;
case 'V': {
position.y = parseFloat(path[++i]);
} break;
case 'v': {
position.y += parseFloat(path[++i]);
} break;
case 'z':
case 'Z': {
position.x = position.beginX;
position.y = position.beginY;
} break;
case 'C': {
i = i + 4;
position.x = parseFloat(path[++i]);
position.y = parseFloat(path[++i]);
} break;
case 'c': {
i = i + 4;
position.x += parseFloat(path[++i]);
position.y += parseFloat(path[++i]);
} break;
case 'S':
case 'Q': {
i = i + 2;
position.x = parseFloat(path[++i]);
position.y = parseFloat(path[++i]);
} break;
case 's':
case 'q': {
i = i + 2;
position.x += parseFloat(path[++i]);
position.y += parseFloat(path[++i]);
} break;
default: {
console.log("WHAT:", bit);
}
}
bbox.x.min = (position.x < bbox.x.min) ? position.x : bbox.x.min;
bbox.x.max = (position.x > bbox.x.max) ? position.x : bbox.x.max;
bbox.y.min = (position.y < bbox.y.min) ? position.y : bbox.y.min;
bbox.y.max = (position.y > bbox.y.max) ? position.y : bbox.y.max;
}
bbox.x.min = Math.round(bbox.x.min*100)/100;
bbox.x.max = Math.round(bbox.x.max*100)/100;
bbox.y.min = Math.round(bbox.y.min*100)/100;
bbox.y.max = Math.round(bbox.y.max*100)/100;
bbox.width = bbox.x.max - bbox.x.min;
bbox.height = bbox.y.max - bbox.y.min;
return bbox;
},
glyphs: {},
settings: {
glyphSize: {
width: 100,
height: 100
},
modalSize: {
width: 500,
height: 500
}
}
};
window.addEventListener('load', function() {
if(window.FileReader && (window.DOMParser || (typeof ActiveXObject !== 'undefined' && (new ActiveXObject("Microsoft.XMLDOM")) !== null))) {
$('fontfileinput').addEventListener('change', FontViewer.handleFiles, false);
} else {
FontViewer.information("I'm sorry, but your browser must support the FileReader and DOMParser APIs. You should try Mozilla Firefox or Google Chrome!", true);
}
}, false);
})();