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work around chrome bug, and work around ff5 bug in the workaround

Chris Jones 14 years ago
parent
7a306afe41
commit
818f79986b
1 changed files with 30 additions and 9 deletions
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  1. 39
      fonts.js

39
fonts.js
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@ -124,6 +124,8 @@ var Fonts = (function Fonts() {
})(); })();
var FontLoader = { var FontLoader = {
listeningForFontLoad: false,
bind: function(fonts, callback) { bind: function(fonts, callback) {
function checkFontsLoaded() { function checkFontsLoaded() {
for (var i = 0; i < fonts.length; i++) { for (var i = 0; i < fonts.length; i++) {
@ -196,6 +198,9 @@ var FontLoader = {
// goes really wonkily, we expect the @font-face for the outer // goes really wonkily, we expect the @font-face for the outer
// document to be processed before the inner. That's still // document to be processed before the inner. That's still
// fragile, but seems to work in practice. // fragile, but seems to work in practice.
//
// The postMessage() hackery was added to work around chrome bug
// 82402.
var div = document.createElement("div"); var div = document.createElement("div");
div.setAttribute("style", div.setAttribute("style",
@ -209,6 +214,28 @@ var FontLoader = {
div.innerHTML = html; div.innerHTML = html;
document.body.appendChild(div); document.body.appendChild(div);
if (!this.listeneningForFontLoad) {
window.addEventListener(
"message",
function(e) {
var fontNames = e.data;
// Firefox 5 doesn't parse the JSON here. Welcome to the
// Wonderful Web World.
if ("string" == typeof(fontNames)) {
fontNames = fontNames.split(",");
}
for (var i = 0; i < fontNames.length; ++i) {
var font = Fonts.lookup(fontNames[i]);
font.loading = false;
}
var evt = document.createEvent("Events");
evt.initEvent("pdfjsFontLoad", true, false);
document.documentElement.dispatchEvent(evt);
},
false);
this.listeneningForFontLoad = true;
}
// XXX we should have a time-out here too, and maybe fire // XXX we should have a time-out here too, and maybe fire
// pdfjsFontLoadFailed? // pdfjsFontLoadFailed?
var src = '<!DOCTYPE HTML><html><head>'; var src = '<!DOCTYPE HTML><html><head>';
@ -224,15 +251,7 @@ var FontLoader = {
} }
src += ' var fontNames=['+ fontNamesArray +'];\n'; src += ' var fontNames=['+ fontNamesArray +'];\n';
src += ' window.onload = function () {\n' src += ' window.onload = function () {\n'
src += ' var Fonts = top.document.defaultView.Fonts;\n'; src += ' top.postMessage(fontNames, "*");\n';
src += ' for (var i = 0; i < fontNames.length; ++i) {\n';
src += ' var font = Fonts.lookup(fontNames[i]);\n';
src += ' font.loading = false;\n';
src += ' }\n';
src += ' var doc = top.document;\n';
src += ' var evt = doc.createEvent("Events");\n';
src += ' evt.initEvent("pdfjsFontLoad", true, false);\n'
src += ' doc.documentElement.dispatchEvent(evt);\n';
src += ' }'; src += ' }';
src += '</script></head><body>'; src += '</script></head><body>';
for (var i = 0; i < names.length; ++i) { for (var i = 0; i < names.length; ++i) {
@ -1117,6 +1136,8 @@ var Font = (function () {
var rule = "@font-face { font-family:'" + fontName + "';src:" + url + "}"; var rule = "@font-face { font-family:'" + fontName + "';src:" + url + "}";
var styleSheet = document.styleSheets[0]; var styleSheet = document.styleSheets[0];
styleSheet.insertRule(rule, styleSheet.cssRules.length); styleSheet.insertRule(rule, styleSheet.cssRules.length);
return rule;
} }
}; };

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