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| /*
* Vector rendering for all browsers that support canvas.
*/
L.Browser.canvas = (function () {
return !!document.createElement('canvas').getContext;
}());
L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path : L.Path.extend({
statics: {
//CLIP_PADDING: 0.02, // not sure if there's a need to set it to a small value
CANVAS: true,
SVG: false
},
redraw: function () {
if (this._map) {
this.projectLatlngs();
this._requestUpdate();
}
return this;
},
setStyle: function (style) {
L.setOptions(this, style);
if (this._map) {
this._updateStyle();
this._requestUpdate();
}
return this;
},
onRemove: function (map) {
map
.off('viewreset', this.projectLatlngs, this)
.off('moveend', this._updatePath, this);
if (this.options.clickable) {
this._map.off('click', this._onClick, this);
}
this._requestUpdate();
this._map = null;
},
_requestUpdate: function () {
if (this._map && !L.Path._updateRequest) {
L.Path._updateRequest = L.Util.requestAnimFrame(this._fireMapMoveEnd, this._map);
}
},
_fireMapMoveEnd: function () {
L.Path._updateRequest = null;
this.fire('moveend');
},
_initElements: function () {
this._map._initPathRoot();
this._ctx = this._map._canvasCtx;
},
_updateStyle: function () {
var options = this.options;
if (options.stroke) {
this._ctx.lineWidth = options.weight;
this._ctx.strokeStyle = options.color;
}
if (options.fill) {
this._ctx.fillStyle = options.fillColor || options.color;
}
},
_drawPath: function () {
var i, j, len, len2, point, drawMethod;
this._ctx.beginPath();
for (i = 0, len = this._parts.length; i < len; i++) {
for (j = 0, len2 = this._parts[i].length; j < len2; j++) {
point = this._parts[i][j];
drawMethod = (j === 0 ? 'move' : 'line') + 'To';
this._ctx[drawMethod](point.x, point.y);
}
// TODO refactor ugly hack
if (this instanceof L.Polygon) {
this._ctx.closePath();
}
}
},
_checkIfEmpty: function () {
return !this._parts.length;
},
_updatePath: function () {
if (this._checkIfEmpty()) { return; }
var ctx = this._ctx,
options = this.options;
this._drawPath();
ctx.save();
this._updateStyle();
if (options.fill) {
ctx.globalAlpha = options.fillOpacity;
ctx.fill();
}
if (options.stroke) {
ctx.globalAlpha = options.opacity;
ctx.stroke();
}
ctx.restore();
// TODO optimization: 1 fill/stroke for all features with equal style instead of 1 for each feature
},
_initEvents: function () {
if (this.options.clickable) {
// TODO dblclick
this._map.on('mousemove', this._onMouseMove, this);
this._map.on('click', this._onClick, this);
}
},
_onClick: function (e) {
if (this._containsPoint(e.layerPoint)) {
this.fire('click', e);
}
},
_onMouseMove: function (e) {
if (this._map._animatingZoom) { return; }
// TODO don't do on each move
if (this._containsPoint(e.layerPoint)) {
this._ctx.canvas.style.cursor = 'pointer';
this._mouseInside = true;
this.fire('mouseover', e);
} else if (this._mouseInside) {
this._ctx.canvas.style.cursor = '';
this._mouseInside = false;
this.fire('mouseout', e);
}
}
});
L.Map.include((L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? {} : {
_initPathRoot: function () {
var root = this._pathRoot,
ctx;
if (!root) {
root = this._pathRoot = document.createElement("canvas");
root.style.position = 'absolute';
ctx = this._canvasCtx = root.getContext('2d');
ctx.lineCap = "round";
ctx.lineJoin = "round";
this._panes.overlayPane.appendChild(root);
if (this.options.zoomAnimation) {
this._pathRoot.className = 'leaflet-zoom-animated';
this.on('zoomanim', this._animatePathZoom);
this.on('zoomend', this._endPathZoom);
}
this.on('moveend', this._updateCanvasViewport);
this._updateCanvasViewport();
}
},
_updateCanvasViewport: function () {
// don't redraw while zooming. See _updateSvgViewport for more details
if (this._pathZooming) { return; }
this._updatePathViewport();
var vp = this._pathViewport,
min = vp.min,
size = vp.max.subtract(min),
root = this._pathRoot;
//TODO check if this works properly on mobile webkit
L.DomUtil.setPosition(root, min);
root.width = size.x;
root.height = size.y;
root.getContext('2d').translate(-min.x, -min.y);
}
});
|