Separate out ol.style.IconImage

2016-08-09 00:23:27 -06:00
parent 4887adce4f
commit d4a5b2f48e
3 changed files with 293 additions and 286 deletions
--- a/src/ol/style/icon.js
+++ b/src/ol/style/icon.js
@@ -3,11 +3,10 @@ goog.provide('ol.style.IconAnchorUnits');
 goog.provide('ol.style.IconOrigin');
 goog.provide('ol.style.iconImageCache');

+goog.require('ol');
 goog.require('ol.events');
-goog.require('ol.events.EventTarget');
 goog.require('ol.events.EventType');
 goog.require('ol.color');
-goog.require('ol.dom');
 goog.require('ol.style.Image');
 goog.require('ol.style.ImageState');

@@ -126,9 +125,9 @@ ol.style.Icon = function(opt_options) {

  /**
   * @private
-   * @type {ol.style.IconImage_}
+   * @type {ol.style.IconImage}
   */
-  this.iconImage_ = ol.style.IconImage_.get(
+  this.iconImage_ = ol.style.IconImage.get(
      image, /** @type {string} */ (src), imgSize, crossOrigin, imageState, color);

  /**
@@ -364,278 +363,6 @@ ol.style.Icon.prototype.unlistenImageChange = function(listener, thisArg) {
 };


-/**
- * @constructor
- * @param {Image|HTMLCanvasElement} image Image.
- * @param {string|undefined} src Src.
- * @param {ol.Size} size Size.
- * @param {?string} crossOrigin Cross origin.
- * @param {ol.style.ImageState} imageState Image state.
- * @param {ol.Color} color Color.
- * @extends {ol.events.EventTarget}
- * @private
- */
-ol.style.IconImage_ = function(image, src, size, crossOrigin, imageState,
-                               color) {
-
-  ol.events.EventTarget.call(this);
-
-  /**
-   * @private
-   * @type {Image|HTMLCanvasElement}
-   */
-  this.hitDetectionImage_ = null;
-
-  /**
-   * @private
-   * @type {Image|HTMLCanvasElement}
-   */
-  this.image_ = !image ? new Image() : image;
-
-  if (crossOrigin !== null) {
-    this.image_.crossOrigin = crossOrigin;
-  }
-
-  /**
-   * @private
-   * @type {HTMLCanvasElement}
-   */
-  this.canvas_ = color ?
-      /** @type {HTMLCanvasElement} */ (document.createElement('CANVAS')) :
-      null;
-
-  /**
-   * @private
-   * @type {ol.Color}
-   */
-  this.color_ = color;
-
-  /**
-   * @private
-   * @type {Array.<ol.EventsKey>}
-   */
-  this.imageListenerKeys_ = null;
-
-  /**
-   * @private
-   * @type {ol.style.ImageState}
-   */
-  this.imageState_ = imageState;
-
-  /**
-   * @private
-   * @type {ol.Size}
-   */
-  this.size_ = size;
-
-  /**
-   * @private
-   * @type {string|undefined}
-   */
-  this.src_ = src;
-
-  /**
-   * @private
-   * @type {boolean}
-   */
-  this.tainting_ = false;
-  if (this.imageState_ == ol.style.ImageState.LOADED) {
-    this.determineTainting_();
-  }
-
-};
-ol.inherits(ol.style.IconImage_, ol.events.EventTarget);
-
-
-/**
- * @param {Image|HTMLCanvasElement} image Image.
- * @param {string} src Src.
- * @param {ol.Size} size Size.
- * @param {?string} crossOrigin Cross origin.
- * @param {ol.style.ImageState} imageState Image state.
- * @param {ol.Color} color Color.
- * @return {ol.style.IconImage_} Icon image.
- */
-ol.style.IconImage_.get = function(image, src, size, crossOrigin, imageState,
-                                   color) {
-  var iconImageCache = ol.style.iconImageCache;
-  var iconImage = iconImageCache.get(src, crossOrigin, color);
-  if (!iconImage) {
-    iconImage = new ol.style.IconImage_(
-        image, src, size, crossOrigin, imageState, color);
-    iconImageCache.set(src, crossOrigin, color, iconImage);
-  }
-  return iconImage;
-};
-
-
-/**
- * @private
- */
-ol.style.IconImage_.prototype.determineTainting_ = function() {
-  var context = ol.dom.createCanvasContext2D(1, 1);
-  try {
-    context.drawImage(this.image_, 0, 0);
-    context.getImageData(0, 0, 1, 1);
-  } catch (e) {
-    this.tainting_ = true;
-  }
-};
-
-
-/**
- * @private
- */
-ol.style.IconImage_.prototype.dispatchChangeEvent_ = function() {
-  this.dispatchEvent(ol.events.EventType.CHANGE);
-};
-
-
-/**
- * @private
- */
-ol.style.IconImage_.prototype.handleImageError_ = function() {
-  this.imageState_ = ol.style.ImageState.ERROR;
-  this.unlistenImage_();
-  this.dispatchChangeEvent_();
-};
-
-
-/**
- * @private
- */
-ol.style.IconImage_.prototype.handleImageLoad_ = function() {
-  this.imageState_ = ol.style.ImageState.LOADED;
-  if (this.size_) {
-    this.image_.width = this.size_[0];
-    this.image_.height = this.size_[1];
-  }
-  this.size_ = [this.image_.width, this.image_.height];
-  this.unlistenImage_();
-  this.determineTainting_();
-  this.replaceColor_();
-  this.dispatchChangeEvent_();
-};
-
-
-/**
- * @param {number} pixelRatio Pixel ratio.
- * @return {Image|HTMLCanvasElement} Image or Canvas element.
- */
-ol.style.IconImage_.prototype.getImage = function(pixelRatio) {
-  return this.canvas_ ? this.canvas_ : this.image_;
-};
-
-
-/**
- * @return {ol.style.ImageState} Image state.
- */
-ol.style.IconImage_.prototype.getImageState = function() {
-  return this.imageState_;
-};
-
-
-/**
- * @param {number} pixelRatio Pixel ratio.
- * @return {Image|HTMLCanvasElement} Image element.
- */
-ol.style.IconImage_.prototype.getHitDetectionImage = function(pixelRatio) {
-  if (!this.hitDetectionImage_) {
-    if (this.tainting_) {
-      var width = this.size_[0];
-      var height = this.size_[1];
-      var context = ol.dom.createCanvasContext2D(width, height);
-      context.fillRect(0, 0, width, height);
-      this.hitDetectionImage_ = context.canvas;
-    } else {
-      this.hitDetectionImage_ = this.image_;
-    }
-  }
-  return this.hitDetectionImage_;
-};
-
-
-/**
- * @return {ol.Size} Image size.
- */
-ol.style.IconImage_.prototype.getSize = function() {
-  return this.size_;
-};
-
-
-/**
- * @return {string|undefined} Image src.
- */
-ol.style.IconImage_.prototype.getSrc = function() {
-  return this.src_;
-};
-
-
-/**
- * Load not yet loaded URI.
- */
-ol.style.IconImage_.prototype.load = function() {
-  if (this.imageState_ == ol.style.ImageState.IDLE) {
-    goog.DEBUG && console.assert(this.src_ !== undefined,
-        'this.src_ must not be undefined');
-    goog.DEBUG && console.assert(!this.imageListenerKeys_,
-        'no listener keys existing');
-    this.imageState_ = ol.style.ImageState.LOADING;
-    this.imageListenerKeys_ = [
-      ol.events.listenOnce(this.image_, ol.events.EventType.ERROR,
-          this.handleImageError_, this),
-      ol.events.listenOnce(this.image_, ol.events.EventType.LOAD,
-          this.handleImageLoad_, this)
-    ];
-    try {
-      this.image_.src = this.src_;
-    } catch (e) {
-      this.handleImageError_();
-    }
-  }
-};
-
-
-/**
- * @private
- */
-ol.style.IconImage_.prototype.replaceColor_ = function() {
-  if (this.tainting_ || this.color_ === null) {
-    return;
-  }
-
-  this.canvas_.width = this.image_.width;
-  this.canvas_.height = this.image_.height;
-
-  var ctx = this.canvas_.getContext('2d');
-  ctx.drawImage(this.image_, 0, 0);
-
-  var imgData = ctx.getImageData(0, 0, this.image_.width, this.image_.height);
-  var data = imgData.data;
-  var r = this.color_[0] / 255.0;
-  var g = this.color_[1] / 255.0;
-  var b = this.color_[2] / 255.0;
-
-  for (var i = 0, ii = data.length; i < ii; i += 4) {
-    data[i] *= r;
-    data[i + 1] *= g;
-    data[i + 2] *= b;
-  }
-  ctx.putImageData(imgData, 0, 0);
-};
-
-
-/**
- * Discards event handlers which listen for load completion or errors.
- *
- * @private
- */
-ol.style.IconImage_.prototype.unlistenImage_ = function() {
-  this.imageListenerKeys_.forEach(ol.events.unlistenByKey);
-  this.imageListenerKeys_ = null;
-};
-
-
 /**
 * @constructor
 * @private
@@ -643,7 +370,7 @@ ol.style.IconImage_.prototype.unlistenImage_ = function() {
 ol.style.IconImageCache_ = function() {

  /**
-   * @type {Object.<string, ol.style.IconImage_>}
+   * @type {Object.<string, ol.style.IconImage>}
   * @private
   */
  this.cache_ = {};
@@ -708,7 +435,7 @@ ol.style.IconImageCache_.prototype.expire = function() {
 * @param {string} src Src.
 * @param {?string} crossOrigin Cross origin.
 * @param {ol.Color} color Color.
- * @return {ol.style.IconImage_} Icon image.
+ * @return {ol.style.IconImage} Icon image.
 */
 ol.style.IconImageCache_.prototype.get = function(src, crossOrigin, color) {
  var key = ol.style.IconImageCache_.getKey(src, crossOrigin, color);
@@ -720,7 +447,7 @@ ol.style.IconImageCache_.prototype.get = function(src, crossOrigin, color) {
 * @param {string} src Src.
 * @param {?string} crossOrigin Cross origin.
 * @param {ol.Color} color Color.
- * @param {ol.style.IconImage_} iconImage Icon image.
+ * @param {ol.style.IconImage} iconImage Icon image.
 */
 ol.style.IconImageCache_.prototype.set = function(src, crossOrigin, color,
                                                 iconImage) {
--- a/src/ol/style/iconimage.js
+++ b/src/ol/style/iconimage.js
@@ -0,0 +1,279 @@
+goog.provide('ol.style.IconImage');
+
+goog.require('ol');
+goog.require('ol.dom');
+goog.require('ol.events');
+goog.require('ol.events.EventTarget');
+goog.require('ol.events.EventType');
+goog.require('ol.style.ImageState');
+
+
+/**
+ * @constructor
+ * @param {Image|HTMLCanvasElement} image Image.
+ * @param {string|undefined} src Src.
+ * @param {ol.Size} size Size.
+ * @param {?string} crossOrigin Cross origin.
+ * @param {ol.style.ImageState} imageState Image state.
+ * @param {ol.Color} color Color.
+ * @extends {ol.events.EventTarget}
+ */
+ol.style.IconImage = function(image, src, size, crossOrigin, imageState,
+                               color) {
+
+  ol.events.EventTarget.call(this);
+
+  /**
+   * @private
+   * @type {Image|HTMLCanvasElement}
+   */
+  this.hitDetectionImage_ = null;
+
+  /**
+   * @private
+   * @type {Image|HTMLCanvasElement}
+   */
+  this.image_ = !image ? new Image() : image;
+
+  if (crossOrigin !== null) {
+    this.image_.crossOrigin = crossOrigin;
+  }
+
+  /**
+   * @private
+   * @type {HTMLCanvasElement}
+   */
+  this.canvas_ = color ?
+      /** @type {HTMLCanvasElement} */ (document.createElement('CANVAS')) :
+      null;
+
+  /**
+   * @private
+   * @type {ol.Color}
+   */
+  this.color_ = color;
+
+  /**
+   * @private
+   * @type {Array.<ol.EventsKey>}
+   */
+  this.imageListenerKeys_ = null;
+
+  /**
+   * @private
+   * @type {ol.style.ImageState}
+   */
+  this.imageState_ = imageState;
+
+  /**
+   * @private
+   * @type {ol.Size}
+   */
+  this.size_ = size;
+
+  /**
+   * @private
+   * @type {string|undefined}
+   */
+  this.src_ = src;
+
+  /**
+   * @private
+   * @type {boolean}
+   */
+  this.tainting_ = false;
+  if (this.imageState_ == ol.style.ImageState.LOADED) {
+    this.determineTainting_();
+  }
+
+};
+ol.inherits(ol.style.IconImage, ol.events.EventTarget);
+
+
+/**
+ * @param {Image|HTMLCanvasElement} image Image.
+ * @param {string} src Src.
+ * @param {ol.Size} size Size.
+ * @param {?string} crossOrigin Cross origin.
+ * @param {ol.style.ImageState} imageState Image state.
+ * @param {ol.Color} color Color.
+ * @return {ol.style.IconImage} Icon image.
+ */
+ol.style.IconImage.get = function(image, src, size, crossOrigin, imageState,
+                                   color) {
+  var iconImageCache = ol.style.iconImageCache;
+  var iconImage = iconImageCache.get(src, crossOrigin, color);
+  if (!iconImage) {
+    iconImage = new ol.style.IconImage(
+        image, src, size, crossOrigin, imageState, color);
+    iconImageCache.set(src, crossOrigin, color, iconImage);
+  }
+  return iconImage;
+};
+
+
+/**
+ * @private
+ */
+ol.style.IconImage.prototype.determineTainting_ = function() {
+  var context = ol.dom.createCanvasContext2D(1, 1);
+  try {
+    context.drawImage(this.image_, 0, 0);
+    context.getImageData(0, 0, 1, 1);
+  } catch (e) {
+    this.tainting_ = true;
+  }
+};
+
+
+/**
+ * @private
+ */
+ol.style.IconImage.prototype.dispatchChangeEvent_ = function() {
+  this.dispatchEvent(ol.events.EventType.CHANGE);
+};
+
+
+/**
+ * @private
+ */
+ol.style.IconImage.prototype.handleImageError_ = function() {
+  this.imageState_ = ol.style.ImageState.ERROR;
+  this.unlistenImage_();
+  this.dispatchChangeEvent_();
+};
+
+
+/**
+ * @private
+ */
+ol.style.IconImage.prototype.handleImageLoad_ = function() {
+  this.imageState_ = ol.style.ImageState.LOADED;
+  if (this.size_) {
+    this.image_.width = this.size_[0];
+    this.image_.height = this.size_[1];
+  }
+  this.size_ = [this.image_.width, this.image_.height];
+  this.unlistenImage_();
+  this.determineTainting_();
+  this.replaceColor_();
+  this.dispatchChangeEvent_();
+};
+
+
+/**
+ * @param {number} pixelRatio Pixel ratio.
+ * @return {Image|HTMLCanvasElement} Image or Canvas element.
+ */
+ol.style.IconImage.prototype.getImage = function(pixelRatio) {
+  return this.canvas_ ? this.canvas_ : this.image_;
+};
+
+
+/**
+ * @return {ol.style.ImageState} Image state.
+ */
+ol.style.IconImage.prototype.getImageState = function() {
+  return this.imageState_;
+};
+
+
+/**
+ * @param {number} pixelRatio Pixel ratio.
+ * @return {Image|HTMLCanvasElement} Image element.
+ */
+ol.style.IconImage.prototype.getHitDetectionImage = function(pixelRatio) {
+  if (!this.hitDetectionImage_) {
+    if (this.tainting_) {
+      var width = this.size_[0];
+      var height = this.size_[1];
+      var context = ol.dom.createCanvasContext2D(width, height);
+      context.fillRect(0, 0, width, height);
+      this.hitDetectionImage_ = context.canvas;
+    } else {
+      this.hitDetectionImage_ = this.image_;
+    }
+  }
+  return this.hitDetectionImage_;
+};
+
+
+/**
+ * @return {ol.Size} Image size.
+ */
+ol.style.IconImage.prototype.getSize = function() {
+  return this.size_;
+};
+
+
+/**
+ * @return {string|undefined} Image src.
+ */
+ol.style.IconImage.prototype.getSrc = function() {
+  return this.src_;
+};
+
+
+/**
+ * Load not yet loaded URI.
+ */
+ol.style.IconImage.prototype.load = function() {
+  if (this.imageState_ == ol.style.ImageState.IDLE) {
+    goog.DEBUG && console.assert(this.src_ !== undefined,
+        'this.src_ must not be undefined');
+    goog.DEBUG && console.assert(!this.imageListenerKeys_,
+        'no listener keys existing');
+    this.imageState_ = ol.style.ImageState.LOADING;
+    this.imageListenerKeys_ = [
+      ol.events.listenOnce(this.image_, ol.events.EventType.ERROR,
+          this.handleImageError_, this),
+      ol.events.listenOnce(this.image_, ol.events.EventType.LOAD,
+          this.handleImageLoad_, this)
+    ];
+    try {
+      this.image_.src = this.src_;
+    } catch (e) {
+      this.handleImageError_();
+    }
+  }
+};
+
+
+/**
+ * @private
+ */
+ol.style.IconImage.prototype.replaceColor_ = function() {
+  if (this.tainting_ || this.color_ === null) {
+    return;
+  }
+
+  this.canvas_.width = this.image_.width;
+  this.canvas_.height = this.image_.height;
+
+  var ctx = this.canvas_.getContext('2d');
+  ctx.drawImage(this.image_, 0, 0);
+
+  var imgData = ctx.getImageData(0, 0, this.image_.width, this.image_.height);
+  var data = imgData.data;
+  var r = this.color_[0] / 255.0;
+  var g = this.color_[1] / 255.0;
+  var b = this.color_[2] / 255.0;
+
+  for (var i = 0, ii = data.length; i < ii; i += 4) {
+    data[i] *= r;
+    data[i + 1] *= g;
+    data[i + 2] *= b;
+  }
+  ctx.putImageData(imgData, 0, 0);
+};
+
+
+/**
+ * Discards event handlers which listen for load completion or errors.
+ *
+ * @private
+ */
+ol.style.IconImage.prototype.unlistenImage_ = function() {
+  this.imageListenerKeys_.forEach(ol.events.unlistenByKey);
+  this.imageListenerKeys_ = null;
+};