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check if the font is fully loaded in safari (and not using question mark boxes) #371

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check if the font is fully loaded in safari (and not using question mark boxes) #371

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15 changes: 14 additions & 1 deletion src/core/fontwatchrunner.js
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Original file line number Diff line number Diff line change
Expand Up @@ -170,6 +170,19 @@ goog.scope(function () {
this.widthMatches_(b, FontWatchRunner.LastResortFonts.SANS_SERIF);
};

/**
* Returns true if both fonts don't match the Safari invalid font (question mark blocks) width
*
* @private
* @param {number} a
* @param {number} b
* @return {boolean}
*/
FontWatchRunner.prototype.isInvalidFont_ = function (a, b) {
var invalidwidth = 2412;
return invalidwidth == a || invalidwidth == b;
};

/**
* Returns true if the WebKit bug is present and both widths match a last resort font.
*
Expand Down Expand Up @@ -206,7 +219,7 @@ goog.scope(function () {
var widthA = this.fontRulerA_.getWidth();
var widthB = this.fontRulerB_.getWidth();

if (this.isFallbackFont_(widthA, widthB) || this.isLastResortFont_(widthA, widthB)) {
if (this.isFallbackFont_(widthA, widthB) || this.isLastResortFont_(widthA, widthB) || this.isInvalidFont_(widthA, widthB)) {
if (this.hasTimedOut_()) {
if (this.isLastResortFont_(widthA, widthB) && this.isMetricCompatibleFont_()) {
this.finish_(this.activeCallback_);
Expand Down