leaflet
Version:
JavaScript library for mobile-friendly interactive maps
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JavaScript
/*
* L.DomUtil contains various utility functions for working with DOM.
*/
L.DomUtil = {
get: function (id) {
return typeof id === 'string' ? document.getElementById(id) : id;
},
getStyle: function (el, style) {
var value = el.style[style] || (el.currentStyle && el.currentStyle[style]);
if ((!value || value === 'auto') && document.defaultView) {
var css = document.defaultView.getComputedStyle(el, null);
value = css ? css[style] : null;
}
return value === 'auto' ? null : value;
},
create: function (tagName, className, container) {
var el = document.createElement(tagName);
el.className = className;
if (container) {
container.appendChild(el);
}
return el;
},
remove: function (el) {
var parent = el.parentNode;
if (parent) {
parent.removeChild(el);
}
},
empty: function (el) {
while (el.firstChild) {
el.removeChild(el.firstChild);
}
},
toFront: function (el) {
el.parentNode.appendChild(el);
},
toBack: function (el) {
var parent = el.parentNode;
parent.insertBefore(el, parent.firstChild);
},
hasClass: function (el, name) {
if (el.classList !== undefined) {
return el.classList.contains(name);
}
var className = L.DomUtil.getClass(el);
return className.length > 0 && new RegExp('(^|\\s)' + name + '(\\s|$)').test(className);
},
addClass: function (el, name) {
if (el.classList !== undefined) {
var classes = L.Util.splitWords(name);
for (var i = 0, len = classes.length; i < len; i++) {
el.classList.add(classes[i]);
}
} else if (!L.DomUtil.hasClass(el, name)) {
var className = L.DomUtil.getClass(el);
L.DomUtil.setClass(el, (className ? className + ' ' : '') + name);
}
},
removeClass: function (el, name) {
if (el.classList !== undefined) {
el.classList.remove(name);
} else {
L.DomUtil.setClass(el, L.Util.trim((' ' + L.DomUtil.getClass(el) + ' ').replace(' ' + name + ' ', ' ')));
}
},
setClass: function (el, name) {
if (el.className.baseVal === undefined) {
el.className = name;
} else {
// in case of SVG element
el.className.baseVal = name;
}
},
getClass: function (el) {
return el.className.baseVal === undefined ? el.className : el.className.baseVal;
},
setOpacity: function (el, value) {
if ('opacity' in el.style) {
el.style.opacity = value;
} else if ('filter' in el.style) {
L.DomUtil._setOpacityIE(el, value);
}
},
_setOpacityIE: function (el, value) {
var filter = false,
filterName = 'DXImageTransform.Microsoft.Alpha';
// filters collection throws an error if we try to retrieve a filter that doesn't exist
try {
filter = el.filters.item(filterName);
} catch (e) {
// don't set opacity to 1 if we haven't already set an opacity,
// it isn't needed and breaks transparent pngs.
if (value === 1) { return; }
}
value = Math.round(value * 100);
if (filter) {
filter.Enabled = (value !== 100);
filter.Opacity = value;
} else {
el.style.filter += ' progid:' + filterName + '(opacity=' + value + ')';
}
},
testProp: function (props) {
var style = document.documentElement.style;
for (var i = 0; i < props.length; i++) {
if (props[i] in style) {
return props[i];
}
}
return false;
},
setTransform: function (el, offset, scale) {
var pos = offset || new L.Point(0, 0);
el.style[L.DomUtil.TRANSFORM] =
(L.Browser.ie3d ?
'translate(' + pos.x + 'px,' + pos.y + 'px)' :
'translate3d(' + pos.x + 'px,' + pos.y + 'px,0)') +
(scale ? ' scale(' + scale + ')' : '');
},
setPosition: function (el, point) { // (HTMLElement, Point[, Boolean])
/*eslint-disable */
el._leaflet_pos = point;
/*eslint-enable */
if (L.Browser.any3d) {
L.DomUtil.setTransform(el, point);
} else {
el.style.left = point.x + 'px';
el.style.top = point.y + 'px';
}
},
getPosition: function (el) {
// this method is only used for elements previously positioned using setPosition,
// so it's safe to cache the position for performance
return el._leaflet_pos;
}
};
(function () {
// prefix style property names
L.DomUtil.TRANSFORM = L.DomUtil.testProp(
['transform', 'WebkitTransform', 'OTransform', 'MozTransform', 'msTransform']);
// webkitTransition comes first because some browser versions that drop vendor prefix don't do
// the same for the transitionend event, in particular the Android 4.1 stock browser
var transition = L.DomUtil.TRANSITION = L.DomUtil.testProp(
['webkitTransition', 'transition', 'OTransition', 'MozTransition', 'msTransition']);
L.DomUtil.TRANSITION_END =
transition === 'webkitTransition' || transition === 'OTransition' ? transition + 'End' : 'transitionend';
if ('onselectstart' in document) {
L.DomUtil.disableTextSelection = function () {
L.DomEvent.on(window, 'selectstart', L.DomEvent.preventDefault);
};
L.DomUtil.enableTextSelection = function () {
L.DomEvent.off(window, 'selectstart', L.DomEvent.preventDefault);
};
} else {
var userSelectProperty = L.DomUtil.testProp(
['userSelect', 'WebkitUserSelect', 'OUserSelect', 'MozUserSelect', 'msUserSelect']);
L.DomUtil.disableTextSelection = function () {
if (userSelectProperty) {
var style = document.documentElement.style;
this._userSelect = style[userSelectProperty];
style[userSelectProperty] = 'none';
}
};
L.DomUtil.enableTextSelection = function () {
if (userSelectProperty) {
document.documentElement.style[userSelectProperty] = this._userSelect;
delete this._userSelect;
}
};
}
L.DomUtil.disableImageDrag = function () {
L.DomEvent.on(window, 'dragstart', L.DomEvent.preventDefault);
};
L.DomUtil.enableImageDrag = function () {
L.DomEvent.off(window, 'dragstart', L.DomEvent.preventDefault);
};
L.DomUtil.preventOutline = function (element) {
while (element.tabIndex === -1) {
element = element.parentNode;
}
if (!element || !element.style) { return; }
L.DomUtil.restoreOutline();
this._outlineElement = element;
this._outlineStyle = element.style.outline;
element.style.outline = 'none';
L.DomEvent.on(window, 'keydown', L.DomUtil.restoreOutline, this);
};
L.DomUtil.restoreOutline = function () {
if (!this._outlineElement) { return; }
this._outlineElement.style.outline = this._outlineStyle;
delete this._outlineElement;
delete this._outlineStyle;
L.DomEvent.off(window, 'keydown', L.DomUtil.restoreOutline, this);
};
})();