Replace unnecessary bind(this) and var self = this statements with arrow functions in remaining src/ files

2017-05-03 16:39:54 +02:00 · 2017-05-03 16:39:54 +02:00 · 6c81b8e6dd
commit 6c81b8e6dd
parent e42fc546a0
7 changed files with 86 additions and 103 deletions
--- a/src/display/annotation_layer.js
+++ b/src/display/annotation_layer.js
@ -312,13 +312,11 @@ var LinkAnnotationElement = (function LinkAnnotationElementClosure() {
     * @param {Object} destination
     * @memberof LinkAnnotationElement
     */
-    _bindLink: function LinkAnnotationElement_bindLink(link, destination) {
-      var self = this;
-
+    _bindLink(link, destination) {
      link.href = this.linkService.getDestinationHash(destination);
-      link.onclick = function() {
+      link.onclick = () => {
        if (destination) {
-          self.linkService.navigateTo(destination);
+          this.linkService.navigateTo(destination);
        }
        return false;
      };
@ -335,13 +333,10 @@ var LinkAnnotationElement = (function LinkAnnotationElementClosure() {
     * @param {Object} action
     * @memberof LinkAnnotationElement
     */
-    _bindNamedAction:
-        function LinkAnnotationElement_bindNamedAction(link, action) {
-      var self = this;
-
+    _bindNamedAction(link, action) {
      link.href = this.linkService.getAnchorUrl('');
-      link.onclick = function() {
-        self.linkService.executeNamedAction(action);
+      link.onclick = () => {
+        this.linkService.executeNamedAction(action);
        return false;
      };
      link.className = 'internalLink';
--- a/src/display/api.js
+++ b/src/display/api.js
@ -369,13 +369,13 @@ var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {

      var transportDestroyed = !this._transport ? Promise.resolve() :
        this._transport.destroy();
-      return transportDestroyed.then(function () {
+      return transportDestroyed.then(() => {
        this._transport = null;
        if (this._worker) {
          this._worker.destroy();
          this._worker = null;
        }
-      }.bind(this));
+      });
    },

    /**
@ -436,22 +436,22 @@ var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
    },

    onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
-      this._readyCapability.promise.then(function () {
+      this._readyCapability.promise.then(() => {
        var listeners = this._progressListeners;
        for (var i = 0, n = listeners.length; i < n; ++i) {
          listeners[i](loaded);
        }
-      }.bind(this));
+      });
    },

    onDataProgressiveRead:
        function PDFDataRangeTransport_onDataProgress(chunk) {
-      this._readyCapability.promise.then(function () {
+      this._readyCapability.promise.then(() => {
        var listeners = this._progressiveReadListeners;
        for (var i = 0, n = listeners.length; i < n; ++i) {
          listeners[i](chunk);
        }
-      }.bind(this));
+      });
    },

    transportReady: function PDFDataRangeTransport_transportReady() {
@ -822,6 +822,26 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
        });
      }

+      var complete = (error) => {
+        var i = intentState.renderTasks.indexOf(internalRenderTask);
+        if (i >= 0) {
+          intentState.renderTasks.splice(i, 1);
+        }
+
+        if (this.cleanupAfterRender) {
+          this.pendingCleanup = true;
+        }
+        this._tryCleanup();
+
+        if (error) {
+          internalRenderTask.capability.reject(error);
+        } else {
+          internalRenderTask.capability.resolve();
+        }
+        stats.timeEnd('Rendering');
+        stats.timeEnd('Overall');
+      };
+
      var internalRenderTask = new InternalRenderTask(complete, params,
                                                      this.objs,
                                                      this.commonObjs,
@ -841,41 +861,15 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
        renderTask.onContinue = params.continueCallback;
      }

-      var self = this;
-      intentState.displayReadyCapability.promise.then(
-        function pageDisplayReadyPromise(transparency) {
-          if (self.pendingCleanup) {
-            complete();
-            return;
-          }
-          stats.time('Rendering');
-          internalRenderTask.initializeGraphics(transparency);
-          internalRenderTask.operatorListChanged();
-        },
-        function pageDisplayReadPromiseError(reason) {
-          complete(reason);
+      intentState.displayReadyCapability.promise.then((transparency) => {
+        if (this.pendingCleanup) {
+          complete();
+          return;
        }
-      );
-
-      function complete(error) {
-        var i = intentState.renderTasks.indexOf(internalRenderTask);
-        if (i >= 0) {
-          intentState.renderTasks.splice(i, 1);
-        }
-
-        if (self.cleanupAfterRender) {
-          self.pendingCleanup = true;
-        }
-        self._tryCleanup();
-
-        if (error) {
-          internalRenderTask.capability.reject(error);
-        } else {
-          internalRenderTask.capability.resolve();
-        }
-        stats.timeEnd('Rendering');
-        stats.timeEnd('Overall');
-      }
+        stats.time('Rendering');
+        internalRenderTask.initializeGraphics(transparency);
+        internalRenderTask.operatorListChanged();
+      }, complete);

      return renderTask;
    },
@ -1106,11 +1100,11 @@ class LoopbackPort {

    var cloned = new WeakMap();
    var e = {data: cloneValue(obj)};
-    this._deferred.then(function () {
+    this._deferred.then(() => {
      this._listeners.forEach(function (listener) {
        listener.call(this, e);
      }, this);
-    }.bind(this));
+    });
  }

  addEventListener(name, listener) {
@ -1267,7 +1261,7 @@ var PDFWorker = (function PDFWorkerClosure() {
          // https://bugzilla.mozilla.org/show_bug.cgi?id=683280
          var worker = new Worker(workerSrc);
          var messageHandler = new MessageHandler('main', 'worker', worker);
-          var terminateEarly = function() {
+          var terminateEarly = () => {
            worker.removeEventListener('error', onWorkerError);
            messageHandler.destroy();
            worker.terminate();
@ -1278,18 +1272,18 @@ var PDFWorker = (function PDFWorkerClosure() {
              // error (e.g. NetworkError / SecurityError).
              this._setupFakeWorker();
            }
-          }.bind(this);
+          };

-          var onWorkerError = function(event) {
+          var onWorkerError = () => {
            if (!this._webWorker) {
              // Worker failed to initialize due to an error. Clean up and fall
              // back to the fake worker.
              terminateEarly();
            }
-          }.bind(this);
+          };
          worker.addEventListener('error', onWorkerError);

-          messageHandler.on('test', function PDFWorker_test(data) {
+          messageHandler.on('test', (data) => {
            worker.removeEventListener('error', onWorkerError);
            if (this.destroyed) {
              terminateEarly();
@ -1313,7 +1307,7 @@ var PDFWorker = (function PDFWorkerClosure() {
              messageHandler.destroy();
              worker.terminate();
            }
-          }.bind(this));
+          });

          messageHandler.on('console_log', function (data) {
            console.log.apply(console, data);
@ -1322,7 +1316,7 @@ var PDFWorker = (function PDFWorkerClosure() {
            console.error.apply(console, data);
          });

-          messageHandler.on('ready', function (data) {
+          messageHandler.on('ready', (data) => {
            worker.removeEventListener('error', onWorkerError);
            if (this.destroyed) {
              terminateEarly();
@ -1334,7 +1328,7 @@ var PDFWorker = (function PDFWorkerClosure() {
              // We need fallback to a faked worker.
              this._setupFakeWorker();
            }
-          }.bind(this));
+          });

          var sendTest = function () {
            var postMessageTransfers =
@ -1373,7 +1367,7 @@ var PDFWorker = (function PDFWorkerClosure() {
        isWorkerDisabled = true;
      }

-      setupFakeWorkerGlobal().then(function (WorkerMessageHandler) {
+      setupFakeWorkerGlobal().then((WorkerMessageHandler) => {
        if (this.destroyed) {
          this._readyCapability.reject(new Error('Worker was destroyed'));
          return;
@ -1397,7 +1391,7 @@ var PDFWorker = (function PDFWorkerClosure() {
        var messageHandler = new MessageHandler(id, id + '_worker', port);
        this._messageHandler = messageHandler;
        this._readyCapability.resolve();
-      }.bind(this));
+      });
    },

    /**
@ -1472,21 +1466,20 @@ var WorkerTransport = (function WorkerTransportClosure() {
      });
      this.pageCache = [];
      this.pagePromises = [];
-      var self = this;
      // We also need to wait for the worker to finish its long running tasks.
      var terminated = this.messageHandler.sendWithPromise('Terminate', null);
      waitOn.push(terminated);
-      Promise.all(waitOn).then(function () {
-        self.fontLoader.clear();
-        if (self.pdfDataRangeTransport) {
-          self.pdfDataRangeTransport.abort();
-          self.pdfDataRangeTransport = null;
+      Promise.all(waitOn).then(() => {
+        this.fontLoader.clear();
+        if (this.pdfDataRangeTransport) {
+          this.pdfDataRangeTransport.abort();
+          this.pdfDataRangeTransport = null;
        }
-        if (self.messageHandler) {
-          self.messageHandler.destroy();
-          self.messageHandler = null;
+        if (this.messageHandler) {
+          this.messageHandler.destroy();
+          this.messageHandler = null;
        }
-        self.destroyCapability.resolve();
+        this.destroyCapability.resolve();
      }, this.destroyCapability.reject);
      return this.destroyCapability.promise;
    },
@ -1641,13 +1634,11 @@ var WorkerTransport = (function WorkerTransportClosure() {
              disableFontFace: getDefaultSetting('disableFontFace'),
              fontRegistry,
            });
+            var fontReady = (fontObjs) => {
+              this.commonObjs.resolve(id, font);
+            };

-            this.fontLoader.bind(
-              [font],
-              function fontReady(fontObjs) {
-                this.commonObjs.resolve(id, font);
-              }.bind(this)
-            );
+            this.fontLoader.bind([font], fontReady);
            break;
          case 'FontPath':
            this.commonObjs.resolve(id, data[2]);
@ -1821,14 +1812,14 @@ var WorkerTransport = (function WorkerTransportClosure() {
      }
      var promise = this.messageHandler.sendWithPromise('GetPage', {
        pageIndex,
-      }).then(function (pageInfo) {
+      }).then((pageInfo) => {
        if (this.destroyed) {
          throw new Error('Transport destroyed');
        }
        var page = new PDFPageProxy(pageIndex, pageInfo, this);
        this.pageCache[pageIndex] = page;
        return page;
-      }.bind(this));
+      });
      this.pagePromises[pageIndex] = promise;
      return promise;
    },
@ -1889,8 +1880,7 @@ var WorkerTransport = (function WorkerTransportClosure() {
    },

    startCleanup: function WorkerTransport_startCleanup() {
-      this.messageHandler.sendWithPromise('Cleanup', null).
-        then(function endCleanup() {
+      this.messageHandler.sendWithPromise('Cleanup', null).then(() => {
        for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
          var page = this.pageCache[i];
          if (page) {
@ -1899,7 +1889,7 @@ var WorkerTransport = (function WorkerTransportClosure() {
        }
        this.commonObjs.clear();
        this.fontLoader.clear();
-      }.bind(this));
+      });
    }
  };
  return WorkerTransport;
--- a/src/display/dom_utils.js
+++ b/src/display/dom_utils.js
@ -64,7 +64,7 @@ var DOMCMapReaderFactory = (function DOMCMapReaderFactoryClosure() {
      if (!name) {
        return Promise.reject(new Error('CMap name must be specified.'));
      }
-      return new Promise(function (resolve, reject) {
+      return new Promise((resolve, reject) => {
        var url = this.baseUrl + name + (this.isCompressed ? '.bcmap' : '');

        var request = new XMLHttpRequest();
@ -73,7 +73,7 @@ var DOMCMapReaderFactory = (function DOMCMapReaderFactoryClosure() {
        if (this.isCompressed) {
          request.responseType = 'arraybuffer';
        }
-        request.onreadystatechange = function () {
+        request.onreadystatechange = () => {
          if (request.readyState !== XMLHttpRequest.DONE) {
            return;
          }
@ -96,10 +96,10 @@ var DOMCMapReaderFactory = (function DOMCMapReaderFactoryClosure() {
          reject(new Error('Unable to load ' +
                           (this.isCompressed ? 'binary ' : '') +
                           'CMap at: ' + url));
-        }.bind(this);
+        };

        request.send(null);
-      }.bind(this));
+      });
    },
  };

--- a/src/display/svg.js
+++ b/src/display/svg.js
@ -403,7 +403,6 @@ SVGGraphics = (function SVGGraphicsClosure() {
      var fnArrayLen = fnArray.length;
      var argsArray = operatorList.argsArray;

-      var self = this;
      for (var i = 0; i < fnArrayLen; i++) {
        if (OPS.dependency === fnArray[i]) {
          var deps = argsArray[i];
@ -412,12 +411,12 @@ SVGGraphics = (function SVGGraphicsClosure() {
            var common = obj.substring(0, 2) === 'g_';
            var promise;
            if (common) {
-              promise = new Promise(function(resolve) {
-                self.commonObjs.get(obj, resolve);
+              promise = new Promise((resolve) => {
+                this.commonObjs.get(obj, resolve);
              });
            } else {
-              promise = new Promise(function(resolve) {
-                self.objs.get(obj, resolve);
+              promise = new Promise((resolve) => {
+                this.objs.get(obj, resolve);
              });
            }
            this.current.dependencies.push(promise);
@ -438,12 +437,12 @@ SVGGraphics = (function SVGGraphicsClosure() {
      this.viewport = viewport;

      var svgElement = this._initialize(viewport);
-      return this.loadDependencies(operatorList).then(function () {
+      return this.loadDependencies(operatorList).then(() => {
        this.transformMatrix = IDENTITY_MATRIX;
        var opTree = this.convertOpList(operatorList);
        this.executeOpTree(opTree);
        return svgElement;
-      }.bind(this));
+      });
    },

    convertOpList: function SVGGraphics_convertOpList(operatorList) {
--- a/src/display/text_layer.js
+++ b/src/display/text_layer.js
@ -537,10 +537,9 @@ var renderTextLayer = (function renderTextLayerClosure() {
      if (!timeout) { // Render right away
        render(this);
      } else { // Schedule
-        var self = this;
-        this._renderTimer = setTimeout(function() {
-          render(self);
-          self._renderTimer = null;
+        this._renderTimer = setTimeout(() => {
+          render(this);
+          this._renderTimer = null;
        }, timeout);
      }
    },
--- a/src/shared/compatibility.js
+++ b/src/shared/compatibility.js
@ -1000,7 +1000,7 @@ PDFJS.compatibilityChecked = true;
        return;
      }
      this.pendingRejectionCheck = true;
-      setTimeout(function rejectionCheck() {
+      setTimeout(() => {
        this.pendingRejectionCheck = false;
        var now = Date.now();
        for (var i = 0; i < this.unhandledRejections.length; i++) {
@ -1023,7 +1023,7 @@ PDFJS.compatibilityChecked = true;
        if (this.unhandledRejections.length) {
          this.scheduleRejectionCheck();
        }
-      }.bind(this), REJECTION_TIMEOUT);
+      }, REJECTION_TIMEOUT);
    }
  };

--- a/src/shared/util.js
+++ b/src/shared/util.js
@ -1227,7 +1227,7 @@ function MessageHandler(sourceName, targetName, comObj) {
  var callbacksCapabilities = this.callbacksCapabilities = Object.create(null);
  var ah = this.actionHandler = Object.create(null);

-  this._onComObjOnMessage = function messageHandlerComObjOnMessage(event) {
+  this._onComObjOnMessage = (event) => {
    var data = event.data;
    if (data.targetName !== this.sourceName) {
      return;
@ -1279,7 +1279,7 @@ function MessageHandler(sourceName, targetName, comObj) {
    } else {
      error('Unknown action from worker: ' + data.action);
    }
-  }.bind(this);
+  };
  comObj.addEventListener('message', this._onComObjOnMessage);
 }