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| goog.provide('ol.renderer.dom.VectorLayer');
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('goog.events');
goog.require('goog.vec.Mat4');
goog.require('ol.ViewHint');
goog.require('ol.dom');
goog.require('ol.extent');
goog.require('ol.layer.Vector');
goog.require('ol.render.Event');
goog.require('ol.render.EventType');
goog.require('ol.render.canvas.Immediate');
goog.require('ol.render.canvas.ReplayGroup');
goog.require('ol.renderer.dom.Layer');
goog.require('ol.renderer.vector');
goog.require('ol.vec.Mat4');
/**
* @constructor
* @extends {ol.renderer.dom.Layer}
* @param {ol.layer.Vector} vectorLayer Vector layer.
*/
ol.renderer.dom.VectorLayer = function(vectorLayer) {
/**
* @private
* @type {CanvasRenderingContext2D}
*/
this.context_ = ol.dom.createCanvasContext2D();
var target = this.context_.canvas;
// Bootstrap sets the style max-width: 100% for all images, which breaks
// prevents the image from being displayed in FireFox. Workaround by
// overriding the max-width style.
target.style.maxWidth = 'none';
target.style.position = 'absolute';
goog.base(this, vectorLayer, target);
/**
* @private
* @type {boolean}
*/
this.dirty_ = false;
/**
* @private
* @type {number}
*/
this.renderedRevision_ = -1;
/**
* @private
* @type {number}
*/
this.renderedResolution_ = NaN;
/**
* @private
* @type {ol.Extent}
*/
this.renderedExtent_ = ol.extent.createEmpty();
/**
* @private
* @type {function(ol.Feature, ol.Feature): number|null}
*/
this.renderedRenderOrder_ = null;
/**
* @private
* @type {ol.render.canvas.ReplayGroup}
*/
this.replayGroup_ = null;
/**
* @private
* @type {goog.vec.Mat4.Number}
*/
this.transform_ = goog.vec.Mat4.createNumber();
/**
* @private
* @type {goog.vec.Mat4.Number}
*/
this.elementTransform_ = goog.vec.Mat4.createNumber();
};
goog.inherits(ol.renderer.dom.VectorLayer, ol.renderer.dom.Layer);
/**
* @inheritDoc
*/
ol.renderer.dom.VectorLayer.prototype.composeFrame =
function(frameState, layerState) {
var vectorLayer = /** @type {ol.layer.Vector} */ (this.getLayer());
goog.asserts.assertInstanceof(vectorLayer, ol.layer.Vector,
'layer is an instance of ol.layer.Vector');
var viewState = frameState.viewState;
var viewCenter = viewState.center;
var viewRotation = viewState.rotation;
var viewResolution = viewState.resolution;
var pixelRatio = frameState.pixelRatio;
var viewWidth = frameState.size[0];
var viewHeight = frameState.size[1];
var imageWidth = viewWidth * pixelRatio;
var imageHeight = viewHeight * pixelRatio;
var transform = ol.vec.Mat4.makeTransform2D(this.transform_,
pixelRatio * viewWidth / 2,
pixelRatio * viewHeight / 2,
pixelRatio / viewResolution,
-pixelRatio / viewResolution,
-viewRotation,
-viewCenter[0], -viewCenter[1]);
var context = this.context_;
// Clear the canvas and set the correct size
context.canvas.width = imageWidth;
context.canvas.height = imageHeight;
var elementTransform = ol.vec.Mat4.makeTransform2D(this.elementTransform_,
0, 0,
1 / pixelRatio, 1 / pixelRatio,
0,
-(imageWidth - viewWidth) / 2 * pixelRatio,
-(imageHeight - viewHeight) / 2 * pixelRatio);
ol.dom.transformElement2D(context.canvas, elementTransform, 6);
this.dispatchEvent_(ol.render.EventType.PRECOMPOSE, frameState, transform);
var replayGroup = this.replayGroup_;
if (replayGroup && !replayGroup.isEmpty()) {
context.globalAlpha = layerState.opacity;
replayGroup.replay(context, pixelRatio, transform, viewRotation,
layerState.managed ? frameState.skippedFeatureUids : {});
this.dispatchEvent_(ol.render.EventType.RENDER, frameState, transform);
}
this.dispatchEvent_(ol.render.EventType.POSTCOMPOSE, frameState, transform);
};
/**
* @param {ol.render.EventType} type Event type.
* @param {olx.FrameState} frameState Frame state.
* @param {goog.vec.Mat4.Number} transform Transform.
* @private
*/
ol.renderer.dom.VectorLayer.prototype.dispatchEvent_ =
function(type, frameState, transform) {
var context = this.context_;
var layer = this.getLayer();
if (layer.hasListener(type)) {
var render = new ol.render.canvas.Immediate(
context, frameState.pixelRatio, frameState.extent, transform,
frameState.viewState.rotation);
var event = new ol.render.Event(type, layer, render, frameState,
context, null);
layer.dispatchEvent(event);
render.flush();
}
};
/**
* @inheritDoc
*/
ol.renderer.dom.VectorLayer.prototype.forEachFeatureAtCoordinate =
function(coordinate, frameState, callback, thisArg) {
if (!this.replayGroup_) {
return undefined;
} else {
var resolution = frameState.viewState.resolution;
var rotation = frameState.viewState.rotation;
var layer = this.getLayer();
var layerState = frameState.layerStates[goog.getUid(layer)];
/** @type {Object.<string, boolean>} */
var features = {};
return this.replayGroup_.forEachFeatureAtCoordinate(coordinate, resolution,
rotation, layerState.managed ? frameState.skippedFeatureUids : {},
/**
* @param {ol.Feature|ol.render.Feature} feature Feature.
* @return {?} Callback result.
*/
function(feature) {
goog.asserts.assert(feature !== undefined, 'received a feature');
var key = goog.getUid(feature).toString();
if (!(key in features)) {
features[key] = true;
return callback.call(thisArg, feature, layer);
}
});
}
};
/**
* Handle changes in image style state.
* @param {goog.events.Event} event Image style change event.
* @private
*/
ol.renderer.dom.VectorLayer.prototype.handleStyleImageChange_ =
function(event) {
this.renderIfReadyAndVisible();
};
/**
* @inheritDoc
*/
ol.renderer.dom.VectorLayer.prototype.prepareFrame =
function(frameState, layerState) {
var vectorLayer = /** @type {ol.layer.Vector} */ (this.getLayer());
goog.asserts.assertInstanceof(vectorLayer, ol.layer.Vector,
'layer is an instance of ol.layer.Vector');
var vectorSource = vectorLayer.getSource();
this.updateAttributions(
frameState.attributions, vectorSource.getAttributions());
this.updateLogos(frameState, vectorSource);
var animating = frameState.viewHints[ol.ViewHint.ANIMATING];
var interacting = frameState.viewHints[ol.ViewHint.INTERACTING];
var updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();
var updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();
if (!this.dirty_ && (!updateWhileAnimating && animating) ||
(!updateWhileInteracting && interacting)) {
return true;
}
var frameStateExtent = frameState.extent;
var viewState = frameState.viewState;
var projection = viewState.projection;
var resolution = viewState.resolution;
var pixelRatio = frameState.pixelRatio;
var vectorLayerRevision = vectorLayer.getRevision();
var vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();
var vectorLayerRenderOrder = vectorLayer.getRenderOrder();
if (vectorLayerRenderOrder === undefined) {
vectorLayerRenderOrder = ol.renderer.vector.defaultOrder;
}
var extent = ol.extent.buffer(frameStateExtent,
vectorLayerRenderBuffer * resolution);
if (!this.dirty_ &&
this.renderedResolution_ == resolution &&
this.renderedRevision_ == vectorLayerRevision &&
this.renderedRenderOrder_ == vectorLayerRenderOrder &&
ol.extent.containsExtent(this.renderedExtent_, extent)) {
return true;
}
// FIXME dispose of old replayGroup in post render
goog.dispose(this.replayGroup_);
this.replayGroup_ = null;
this.dirty_ = false;
var replayGroup =
new ol.render.canvas.ReplayGroup(
ol.renderer.vector.getTolerance(resolution, pixelRatio), extent,
resolution, vectorLayer.getRenderBuffer());
vectorSource.loadFeatures(extent, resolution, projection);
var renderFeature =
/**
* @param {ol.Feature} feature Feature.
* @this {ol.renderer.dom.VectorLayer}
*/
function(feature) {
var styles;
var styleFunction = feature.getStyleFunction();
if (styleFunction) {
styles = styleFunction.call(feature, resolution);
} else {
styleFunction = vectorLayer.getStyleFunction();
if (styleFunction) {
styles = styleFunction(feature, resolution);
}
}
if (styles) {
var dirty = this.renderFeature(
feature, resolution, pixelRatio, styles, replayGroup);
this.dirty_ = this.dirty_ || dirty;
}
};
if (vectorLayerRenderOrder) {
/** @type {Array.<ol.Feature>} */
var features = [];
vectorSource.forEachFeatureInExtent(extent,
/**
* @param {ol.Feature} feature Feature.
*/
function(feature) {
features.push(feature);
}, this);
goog.array.sort(features, vectorLayerRenderOrder);
features.forEach(renderFeature, this);
} else {
vectorSource.forEachFeatureInExtent(extent, renderFeature, this);
}
replayGroup.finish();
this.renderedResolution_ = resolution;
this.renderedRevision_ = vectorLayerRevision;
this.renderedRenderOrder_ = vectorLayerRenderOrder;
this.renderedExtent_ = extent;
this.replayGroup_ = replayGroup;
return true;
};
/**
* @param {ol.Feature} feature Feature.
* @param {number} resolution Resolution.
* @param {number} pixelRatio Pixel ratio.
* @param {Array.<ol.style.Style>} styles Array of styles
* @param {ol.render.canvas.ReplayGroup} replayGroup Replay group.
* @return {boolean} `true` if an image is loading.
*/
ol.renderer.dom.VectorLayer.prototype.renderFeature =
function(feature, resolution, pixelRatio, styles, replayGroup) {
if (!styles) {
return false;
}
var i, ii, loading = false;
for (i = 0, ii = styles.length; i < ii; ++i) {
loading = ol.renderer.vector.renderFeature(
replayGroup, feature, styles[i],
ol.renderer.vector.getSquaredTolerance(resolution, pixelRatio),
this.handleStyleImageChange_, this) || loading;
}
return loading;
};
|