Differential D10280 Diff 24782 webroot/rsrc/js/core/TextAreaUtils.js

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webroot/rsrc/js/core/TextAreaUtils.js

/**		/**
* @requires javelin-install		* @requires javelin-install
		* javelin-dom
		* javelin-vector
* @provides phabricator-textareautils		* @provides phabricator-textareautils
* @javelin		* @javelin
*/		*/

JX.install('TextAreaUtils', {		JX.install('TextAreaUtils', {
statics : {		statics : {
getSelectionRange : function(area) {		getSelectionRange : function(area) {
var v = area.value;		var v = area.value;
Show All 28 Lines	statics : {
setSelectionText : function(area, text) {		setSelectionText : function(area, text) {
var v = area.value;		var v = area.value;
var r = JX.TextAreaUtils.getSelectionRange(area);		var r = JX.TextAreaUtils.getSelectionRange(area);

v = v.substring(0, r.start) + text + v.substring(r.end, v.length);		v = v.substring(0, r.start) + text + v.substring(r.end, v.length);
area.value = v;		area.value = v;

JX.TextAreaUtils.setSelectionRange(area, r.start, r.start + text.length);		JX.TextAreaUtils.setSelectionRange(area, r.start, r.start + text.length);
		},

		/**
		* Get the document pixel positions of the beginning and end of a character
		* range in a textarea.
		*/
		getPixelDimensions: function(area, start, end) {
		var v = area.value;

		// We're using zero-width spaces to make sure the spans get some
		// height even if there's no text in the metrics tag.

		var head = v.substring(0, start);
		var before = JX.$N('span', {}, '\u200b');
		var body = v.substring(start, end);
		var after = JX.$N('span', {}, '\u200b');

		// Create a similar shadow element which we can measure.
		var metrics = JX.$N(
		'var',
		{
		className: area.className,
		},
		[head, before, body, after]);

		// If the textarea has a scrollbar, force a scrollbar on the shadow
		// element too.
		if (area.scrollHeight > area.clientHeight) {
		metrics.style.overflowY = 'scroll';
}		}

		area.parentNode.appendChild(metrics);

		// Adjust the positions we read out of the document to account for the
		// current scroll position of the textarea.
		var metrics_pos = JX.Vector.getPos(metrics);
		metrics_pos.x += area.scrollLeft;
		metrics_pos.y += area.scrollTop;

		var area_pos = JX.Vector.getPos(area);
		var before_pos = JX.Vector.getPos(before);
		var after_pos = JX.Vector.getPos(after);

		JX.DOM.remove(metrics);

		return {
		start: {
		x: area_pos.x + (before_pos.x - metrics_pos.x),
		y: area_pos.y + (before_pos.y - metrics_pos.y)
		},
		end: {
		x: area_pos.x + (after_pos.x - metrics_pos.x),
		y: area_pos.y + (after_pos.y - metrics_pos.y)
		}
		};
		}

}		}
});		});