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Make text height detection independent of css settings

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This commit is contained in:
Andreas Hocevar
2017-10-11 00:21:29 +02:00
parent 80dbedf946
commit 1fcb94a29c
1 changed files with 11 additions and 10 deletions
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21
src/ol/render/canvas/textreplay.js
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@@ -126,18 +126,19 @@ ol.render.canvas.TextReplay.labelCache_ = new ol.structs.LRUCache();
* @return {ol.Size} Measurement.
*/
ol.render.canvas.TextReplay.measureTextHeight = (function() {
var textContainer;
var span;
return function(font, lines, widths) {
if (!textContainer) {
textContainer = document.createElement('span');
textContainer.textContent = 'M';
textContainer.style.visibility = 'hidden';
textContainer.style.whiteSpace = 'nowrap';
if (!span) {
span = document.createElement('span');
span.textContent = 'M';
span.style.margin = span.style.padding = '0 !important';
span.style.position = 'absolute !important';
span.style.left = '-99999px !important';
}
textContainer.style.font = font;
document.body.appendChild(textContainer);
var height = textContainer.offsetHeight;
document.body.removeChild(textContainer);
span.style.font = font;
document.body.appendChild(span);
var height = span.offsetHeight;
document.body.removeChild(span);
return height;
};
})();