Pull context menu related APIs from core.js to their own file.

ios/web/web_state/js/resources/core.js

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file adheres to closure-compiler conventions in order to enable
 // compilation with ADVANCED_OPTIMIZATIONS. In particular, members that are to
 // be accessed externally should be specified in this['style'] as opposed to
 // this.style because member identifiers are minified by default.
 // See http://goo.gl/FwOgy
 
@@ skipping 22 matching lines @@
   // JavaScript errors are logged on the main application side. The handler is
   // added ASAP to catch any errors in startup. Note this does not appear to
   // work in iOS < 5.
   window.addEventListener('error', function(event) {
     // Sadly, event.filename and event.lineno are always 'undefined' and '0'
     // with UIWebView.
     invokeOnHost_({'command': 'window.error',
                    'message': event.message.toString()});
   });
 
-  /**
-   * Margin in points around touchable elements (e.g. links for custom context
-   * menu).
-   * @type {number}
-   */
-  var touchMargin_ = 25;
-
-  __gCrWeb['getPageWidth'] = function() {
-    var documentElement = document.documentElement;
-    var documentBody = document.body;
-    return Math.max(documentElement.clientWidth,
-                    documentElement.scrollWidth,
-                    documentElement.offsetWidth,
-                    documentBody.scrollWidth,
-                    documentBody.offsetWidth);
-  };
-
-  // Implementation of document.elementFromPoint that is working for iOS4 and
-  // iOS5 and that also goes into frames and iframes.
-  var elementFromPoint_ = function(x, y) {
-    var elementFromPointIsUsingViewPortCoordinates = function(win) {
-      if (win.pageYOffset > 0) {  // Page scrolled down.
-        return (win.document.elementFromPoint(
-            0, win.pageYOffset + win.innerHeight - 1) === null);
-      }
-      if (win.pageXOffset > 0) {  // Page scrolled to the right.
-        return (win.document.elementFromPoint(
-            win.pageXOffset + win.innerWidth - 1, 0) === null);
-      }
-      return false;  // No scrolling, don't care.
-    };
-
-    var newCoordinate = function(x, y) {
-      var coordinates = {
-          x: x, y: y,
-          viewPortX: x - window.pageXOffset, viewPortY: y - window.pageYOffset,
-          useViewPortCoordinates: false,
-          window: window
-      };
-      return coordinates;
-    };
-
-    // Returns the coordinates of the upper left corner of |obj| in the
-    // coordinates of the window that |obj| is in.
-    var getPositionInWindow = function(obj) {
-      var coord = { x: 0, y: 0 };
-      while (obj.offsetParent) {
-        coord.x += obj.offsetLeft;
-        coord.y += obj.offsetTop;
-        obj = obj.offsetParent;
-      }
-      return coord;
-    };
-
-    var elementsFromCoordinates = function(coordinates) {
-      coordinates.useViewPortCoordinates = coordinates.useViewPortCoordinates ||
-          elementFromPointIsUsingViewPortCoordinates(coordinates.window);
-
-      var currentElement = null;
-      if (coordinates.useViewPortCoordinates) {
-        currentElement = coordinates.window.document.elementFromPoint(
-            coordinates.viewPortX, coordinates.viewPortY);
-      } else {
-        currentElement = coordinates.window.document.elementFromPoint(
-            coordinates.x, coordinates.y);
-      }
-      // We have to check for tagName, because if a selection is made by the
-      // UIWebView, the element we will get won't have one.
-      if (!currentElement || !currentElement.tagName) {
-        return null;
-      }
-      if (currentElement.tagName.toLowerCase() === 'iframe' ||
-          currentElement.tagName.toLowerCase() === 'frame') {
-        // The following condition is true if the iframe is in a different
-        // domain; no further information is accessible.
-        if (typeof(currentElement.contentWindow.document) == 'undefined') {
-          return currentElement;
-        }
-        var framePosition = getPositionInWindow(currentElement);
-        coordinates.viewPortX -=
-            framePosition.x - coordinates.window.pageXOffset;
-        coordinates.viewPortY -=
-            framePosition.y - coordinates.window.pageYOffset;
-        coordinates.window = currentElement.contentWindow;
-        coordinates.x -= framePosition.x + coordinates.window.pageXOffset;
-        coordinates.y -= framePosition.y + coordinates.window.pageYOffset;
-        return elementsFromCoordinates(coordinates);
-      }
-      return currentElement;
-    };
-
-    return elementsFromCoordinates(newCoordinate(x, y));
-  };
-
-  var spiralCoordinates = function(x, y) {
-    var coordinates = [];
-
-    var maxAngle = Math.PI * 2.0 * 3.0;
-    var pointCount = 30;
-    var angleStep = maxAngle / pointCount;
-    var speed = touchMargin_ / maxAngle;
-
-    for (var index = 0; index < pointCount; index++) {
-      var angle = angleStep * index;
-      var radius = angle * speed;
-
-      coordinates.push({x: x + Math.round(Math.cos(angle) * radius),
-                        y: y + Math.round(Math.sin(angle) * radius)});
-    }
-
-    return coordinates;
-  };
-
-  // Returns the url of the image or link under the selected point. Returns an
-  // empty string if no links or images are found.
-  __gCrWeb['getElementFromPoint'] = function(x, y) {
-    var hitCoordinates = spiralCoordinates(x, y);
-    for (var index = 0; index < hitCoordinates.length; index++) {
-      var coordinates = hitCoordinates[index];
-
-      var element = elementFromPoint_(coordinates.x, coordinates.y);
-      if (!element || !element.tagName) {
-        // Nothing under the hit point. Try the next hit point.
-        continue;
-      }
-
-      if (getComputedWebkitTouchCallout_(element) === 'none')
-        continue;
-      // Also check element's ancestors. A bound on the level is used here to
-      // avoid large overhead when no links or images are found.
-      var level = 0;
-      while (++level < 8 && element && element != document) {
-        var tagName = element.tagName;
-        if (!tagName)
-          continue;
-        tagName = tagName.toLowerCase();
-
-        if (tagName === 'input' || tagName === 'textarea' ||
-            tagName === 'select' || tagName === 'option') {
-          // If the element is a known input element, stop the spiral search and
-          // return empty results.
-          return {};
-        }
-
-        if (tagName === 'a' && element.href) {
-          // Found a link.
-          return {
-            href: element.href,
-            referrerPolicy: getReferrerPolicy_(element),
-            innerText: element.innerText
-          };
-        }
-
-        if (tagName === 'img' && element.src) {
-          // Found an image.
-          var result = {
-            src: element.src,
-            referrerPolicy: getReferrerPolicy_()
-          };
-          // Copy the title, if any.
-          if (element.title) {
-            result.title = element.title;
-          }
-          // Check if the image is also a link.
-          var parent = element.parentNode;
-          while (parent) {
-            if (parent.tagName &&
-                parent.tagName.toLowerCase() === 'a' &&
-                parent.href) {
-              // This regex identifies strings like void(0),
-              // void(0)  ;void(0);, ;;;;
-              // which result in a NOP when executed as JavaScript.
-              var regex = RegExp("^javascript:(?:(?:void\\(0\\)|;)\\s*)+$");
-              if (parent.href.match(regex)) {
-                parent = parent.parentNode;
-                continue;
-              }
-              result.href = parent.href;
-              result.referrerPolicy = getReferrerPolicy_(parent);
-              break;
-            }
-            parent = parent.parentNode;
-          }
-          return result;
-        }
-        element = element.parentNode;
-      }
-    }
-    return {};
-  };
-
-  // Suppresses the next click such that they are not handled by JS click
-  // event handlers.
-  __gCrWeb['suppressNextClick'] = function() {
-    var suppressNextClick = function(evt) {
-      evt.preventDefault();
-      document.removeEventListener('click', suppressNextClick, false);
-    };
-    document.addEventListener('click', suppressNextClick);
-  };
 
   // Returns true if the top window or any frames inside contain an input
   // field of type 'password'.
   __gCrWeb['hasPasswordField'] = function() {
     return hasPasswordField_(window);
   };
 
   // Returns a string that is formatted according to the JSON syntax rules.
   // This is equivalent to the built-in JSON.stringify() function, but is
   // less likely to be overridden by the website itself.  This public function
@@ skipping 78 matching lines @@
       }
     }
 
     return false;
   };
 
   function invokeOnHost_(command) {
     __gCrWeb.message.invokeOnHost(command);
   };
 
-  /**
-   * Gets the referrer policy to use for navigations away from the current page.
-   * If a link element is passed, and it includes a rel=noreferrer tag, that
-   * will override the page setting.
-   * @param {HTMLElement=} opt_linkElement The link triggering the navigation.
-   * @return {string} The policy string.
-   * @private
-   */
-  var getReferrerPolicy_ = function(opt_linkElement) {
-    if (opt_linkElement) {
-      var rel = opt_linkElement.getAttribute('rel');
-      if (rel && rel.toLowerCase() == 'noreferrer') {
-        return 'never';
-      }
-    }
-
-    var metaTags = document.getElementsByTagName('meta');
-    for (var i = 0; i < metaTags.length; ++i) {
-      if (metaTags[i].name.toLowerCase() == 'referrer') {
-        return metaTags[i].content.toLowerCase();
-      }
-    }
-    return 'default';
-  };
-
   // Various aspects of global DOM behavior are overridden here.
 
   // A popstate event needs to be fired anytime the active history entry
   // changes without an associated document change. Either via back, forward, go
   // navigation or by loading the URL, clicking on a link, etc.
   __gCrWeb['dispatchPopstateEvent'] = function(stateObject) {
     var popstateEvent = window.document.createEvent('HTMLEvents');
     popstateEvent.initEvent('popstate', true, false);
     if (stateObject)
       popstateEvent.state = JSON.parse(stateObject);
@@ skipping 98 matching lines @@
   window.scrollTo = function(x, y) {
     if (webViewScrollViewIsDragging_)
       return;
     originalWindowScrollTo(x, y);
   };
 
   window.addEventListener('hashchange', function(evt) {
     invokeOnHost_({'command': 'window.hashchange'});
   });
 
-  var getComputedWebkitTouchCallout_ = function(element) {
-    return window.getComputedStyle(element, null)['webkitTouchCallout'];
-  };
-
   // Flush the message queue.
   if (__gCrWeb.message) {
     __gCrWeb.message.invokeQueues();
   }
 
   // Capture form submit actions.
   document.addEventListener('submit', function(evt) {
     var action;
     if (evt['defaultPrevented'])
       return;
     action = evt.target.getAttribute('action');
     // Default action is to re-submit to same page.
     if (!action)
       action = document.location.href;
     invokeOnHost_({
              'command': 'document.submit',
             'formName': __gCrWeb.common.getFormIdentifier(evt.srcElement),
                 'href': __gCrWeb['getFullyQualifiedURL'](action)
     });
   }, false);
 
   addFormEventListeners_();
 
 }());  // End of anonymous object