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Check if fonts are available and redraw when label cache was cleared

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This commit is contained in:
Andreas Hocevar
2017-10-20 00:02:20 +02:00
parent dea8a340a6
commit 7f865b8520
10 changed files with 376 additions and 21 deletions
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66
test/spec/ol/render/canvas/index.test.js
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@@ -1,10 +1,72 @@
goog.require('ol.events');
goog.require('ol.obj');
goog.require('ol.render.canvas');
describe('ol.render.canvas', function() {
var font = document.createElement('link');
font.href = 'https://fonts.googleapis.com/css?family=Inconsolata';
font.rel = 'stylesheet';
var head = document.getElementsByTagName('head')[0];
describe('ol.render.canvas.checkFont()', function() {
var checkFont = ol.render.canvas.checkFont;
it('does not clear the label cache for unavailable fonts', function(done) {
ol.obj.clear(ol.render.canvas.checkedFonts_);
var spy = sinon.spy();
ol.events.listen(ol.render.canvas.labelCache, 'clear', spy);
checkFont('12px foo,sans-serif');
setTimeout(function() {
ol.events.unlisten(ol.render.canvas.labelCache, 'clear', spy);
expect(spy.callCount).to.be(0);
done();
}, 1600);
});
it('does not clear the label cache for available fonts', function(done) {
ol.obj.clear(ol.render.canvas.checkedFonts_);
var spy = sinon.spy();
ol.events.listen(ol.render.canvas.labelCache, 'clear', spy);
checkFont('12px sans-serif');
setTimeout(function() {
ol.events.unlisten(ol.render.canvas.labelCache, 'clear', spy);
expect(spy.callCount).to.be(0);
done();
}, 800);
});
it('does not clear the label cache for the \'monospace\' font', function(done) {
ol.obj.clear(ol.render.canvas.checkedFonts_);
var spy = sinon.spy();
ol.events.listen(ol.render.canvas.labelCache, 'clear', spy);
checkFont('12px monospace');
setTimeout(function() {
ol.events.unlisten(ol.render.canvas.labelCache, 'clear', spy);
expect(spy.callCount).to.be(0);
done();
}, 800);
});
it('clears the label cache for fonts that become available', function(done) {
ol.obj.clear(ol.render.canvas.checkedFonts_);
head.appendChild(font);
var spy = sinon.spy();
ol.events.listen(ol.render.canvas.labelCache, 'clear', spy);
checkFont('12px Inconsolata');
setTimeout(function() {
ol.events.unlisten(ol.render.canvas.labelCache, 'clear', spy);
head.removeChild(font);
expect(spy.callCount).to.be(1);
done();
}, 1600);
});
});
describe('rotateAtOffset', function() {
it('rotates a canvas at an offset point', function() {
var context = {