trace-viewer/trace_viewer/core/selection.html - fp2-dev/platform/external/chromium-trace - Gitiles

 <!DOCTYPE html>
 <!--
 Copyright (c) 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.
 -->

 <link rel="import" href="/base/events.html">
 <link rel="import" href="/base/guid.html">
 <link rel="import" href="/base/range.html">
 <link rel="import" href="/core/trace_model/trace_model.html">

 <script>
 'use strict';

 /**
  * @fileoverview Code for the viewport.
  */
 tv.exportTo('tv.c', function() {

   var EventRegistry = tv.c.trace_model.EventRegistry;

   var RequestSelectionChangeEvent = tv.b.Event.bind(
       undefined, 'requestSelectionChange', true, false);

   /**
    * Represents a selection within a  and its associated set of tracks.
    * @constructor
    */
   function Selection(opt_events) {
     // sunburst_zoom_level is used by sunburst chart to remember
     // zoom level across selection changes.
     // TODO(gholap): get rid of this eventually when
     //               selections support frames.
     this.sunburst_zoom_level = undefined;

     this.bounds_dirty_ = true;
     this.bounds_ = new tv.b.Range();
     this.length_ = 0;
     this.guid_ = tv.b.GUID.allocate();
     this.pushed_guids_ = {};

     if (opt_events) {
       for (var i = 0; i < opt_events.length; i++)
         this.push(opt_events[i]);
     }
   }
   Selection.prototype = {
     __proto__: Object.prototype,

     get bounds() {
       if (this.bounds_dirty_) {
         this.bounds_.reset();
         for (var i = 0; i < this.length_; i++)
           this[i].addBoundsToRange(this.bounds_);
         this.bounds_dirty_ = false;
       }
       return this.bounds_;
     },

     get duration() {
       if (this.bounds_.isEmpty)
         return 0;
       return this.bounds_.max - this.bounds_.min;
     },

     get length() {
       return this.length_;
     },

     get guid() {
       return this.guid_;
     },

     clear: function() {
       for (var i = 0; i < this.length_; ++i)
         delete this[i];
       this.length_ = 0;
       this.bounds_dirty_ = true;
     },

     // push pushes only unique events.
     // If an event has been already pushed, do nothing.
     push: function(event) {
       if (event.guid == undefined)
         throw new Error('Event must have a GUID');

       if (this.pushed_guids_[event.guid])
         return event;

       this.pushed_guids_[event.guid] = true;
       this[this.length_++] = event;
       this.bounds_dirty_ = true;
       return event;
     },

     addSelection: function(selection) {
       for (var i = 0; i < selection.length; i++)
         this.push(selection[i]);
     },

     subSelection: function(index, count) {
       count = count || 1;

       var selection = new Selection();
       selection.bounds_dirty_ = true;
       if (index < 0 || index + count > this.length_)
         throw new Error('Index out of bounds');

       for (var i = index; i < index + count; i++)
         selection.push(this[i]);

       return selection;
     },

     getEventsOrganizedByBaseType: function(opt_pruneEmpty) {
       var events = {};
       var allTypeInfos = EventRegistry.getAllRegisteredTypeInfos();
       allTypeInfos.forEach(function(eventTypeInfo) {
         events[eventTypeInfo.metadata.name] = new Selection();
         if (this.sunburst_zoom_level !== undefined)
           events[eventTypeInfo.metadata.name].sunburst_zoom_level =
               this.sunburst_zoom_level;
       }, this);

       this.forEach(function(event, i) {
         var maxEventIndex = -1;
         var maxEventTypeInfo = undefined;
         allTypeInfos.forEach(function(eventTypeInfo, eventIndex) {
           if (!(event instanceof eventTypeInfo.constructor))
             return;
           if (eventIndex > maxEventIndex) {
             maxEventIndex = eventIndex;
             maxEventTypeInfo = eventTypeInfo;
           }
         });
         if (maxEventIndex == -1)
           throw new Error('Unrecgonized event type');
         events[maxEventTypeInfo.metadata.name].push(event);
       });
       if (opt_pruneEmpty) {
         var prunedEvents = {};
         for (var eventType in events) {
           if (events[eventType].length > 0)
             prunedEvents[eventType] = events[eventType];
         }
         return prunedEvents;
       } else {
         return events;
       }
     },

     enumEventsOfType: function(type, func) {
       for (var i = 0; i < this.length_; i++)
         if (this[i] instanceof type)
           func(this[i]);
     },

     /**
      * Helper for selection previous or next.
      * @param {boolean} offset If positive, select one forward (next).
      *   Else, select previous.
      *
      * @param {TimelineViewport} viewport The viewport to use to determine what
      * is near to the current selection.
      *
      * @return {boolean} true if current selection changed.
      */
     getShiftedSelection: function(viewport, offset) {
       var newSelection = new Selection();
       for (var i = 0; i < this.length_; i++) {
         var event = this[i];

         var addEventToNewSelection = function(event) {
         };

         // If this is a flow event, and we have a next/prev item in the chain
         // then we use that as the item to move too. Otherwise, we let the
         // normal movement for a slice kick in and use that.
         if (event instanceof tv.c.trace_model.FlowEvent) {
           if ((offset > 0) && event.nextFlowEvent) {
             newSelection.push(event.nextFlowEvent);
             continue;
           } else if ((offset < 0) && event.previousFlowEvent) {
             newSelection.push(event.previousFlowEvent);
             continue;
           }
         }

         var track = viewport.trackForEvent(event);
         track.addItemNearToProvidedEventToSelection(
             event, offset, newSelection);
       }

       if (newSelection.length == 0)
         return undefined;
       return newSelection;
     },

     forEach: function(fn, opt_this) {
       for (var i = 0; i < this.length; i++)
         fn.call(opt_this, this[i], i);
     },

     map: function(fn, opt_this) {
       var res = [];
       for (var i = 0; i < this.length; i++)
         res.push(fn.call(opt_this, this[i], i));
       return res;
     },

     every: function(fn, opt_this) {
       for (var i = 0; i < this.length; i++)
         if (!fn.call(opt_this, this[i], i))
           return false;
       return true;
     },

     some: function(fn, opt_this) {
       for (var i = 0; i < this.length; i++)
         if (fn.call(opt_this, this[i], i))
           return true;
       return false;
     }
   };

   return {
     Selection: Selection,
     RequestSelectionChangeEvent: RequestSelectionChangeEvent
   };
 });
 </script>
	<!DOCTYPE html>
	<!--
	Copyright (c) 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.
	-->

	<link rel="import" href="/base/events.html">
	<link rel="import" href="/base/guid.html">
	<link rel="import" href="/base/range.html">
	<link rel="import" href="/core/trace_model/trace_model.html">

	<script>
	'use strict';

	/**
	* @fileoverview Code for the viewport.
	*/
	tv.exportTo('tv.c', function() {

	var EventRegistry = tv.c.trace_model.EventRegistry;

	var RequestSelectionChangeEvent = tv.b.Event.bind(
	undefined, 'requestSelectionChange', true, false);

	/**
	* Represents a selection within a and its associated set of tracks.
	* @constructor
	*/
	function Selection(opt_events) {
	// sunburst_zoom_level is used by sunburst chart to remember
	// zoom level across selection changes.
	// TODO(gholap): get rid of this eventually when
	// selections support frames.
	this.sunburst_zoom_level = undefined;

	this.bounds_dirty_ = true;
	this.bounds_ = new tv.b.Range();
	this.length_ = 0;
	this.guid_ = tv.b.GUID.allocate();
	this.pushed_guids_ = {};

	if (opt_events) {
	for (var i = 0; i < opt_events.length; i++)
	this.push(opt_events[i]);
	}
	}
	Selection.prototype = {
	__proto__: Object.prototype,

	get bounds() {
	if (this.bounds_dirty_) {
	this.bounds_.reset();
	for (var i = 0; i < this.length_; i++)
	this[i].addBoundsToRange(this.bounds_);
	this.bounds_dirty_ = false;
	}
	return this.bounds_;
	},

	get duration() {
	if (this.bounds_.isEmpty)
	return 0;
	return this.bounds_.max - this.bounds_.min;
	},

	get length() {
	return this.length_;
	},

	get guid() {
	return this.guid_;
	},

	clear: function() {
	for (var i = 0; i < this.length_; ++i)
	delete this[i];
	this.length_ = 0;
	this.bounds_dirty_ = true;
	},

	// push pushes only unique events.
	// If an event has been already pushed, do nothing.
	push: function(event) {
	if (event.guid == undefined)
	throw new Error('Event must have a GUID');

	if (this.pushed_guids_[event.guid])
	return event;

	this.pushed_guids_[event.guid] = true;
	this[this.length_++] = event;
	this.bounds_dirty_ = true;
	return event;
	},

	addSelection: function(selection) {
	for (var i = 0; i < selection.length; i++)
	this.push(selection[i]);
	},

	subSelection: function(index, count) {
	count = count \|\| 1;

	var selection = new Selection();
	selection.bounds_dirty_ = true;
	if (index < 0 \|\| index + count > this.length_)
	throw new Error('Index out of bounds');

	for (var i = index; i < index + count; i++)
	selection.push(this[i]);

	return selection;
	},

	getEventsOrganizedByBaseType: function(opt_pruneEmpty) {
	var events = {};
	var allTypeInfos = EventRegistry.getAllRegisteredTypeInfos();
	allTypeInfos.forEach(function(eventTypeInfo) {
	events[eventTypeInfo.metadata.name] = new Selection();
	if (this.sunburst_zoom_level !== undefined)
	events[eventTypeInfo.metadata.name].sunburst_zoom_level =
	this.sunburst_zoom_level;
	}, this);

	this.forEach(function(event, i) {
	var maxEventIndex = -1;
	var maxEventTypeInfo = undefined;
	allTypeInfos.forEach(function(eventTypeInfo, eventIndex) {
	if (!(event instanceof eventTypeInfo.constructor))
	return;
	if (eventIndex > maxEventIndex) {
	maxEventIndex = eventIndex;
	maxEventTypeInfo = eventTypeInfo;
	}
	});
	if (maxEventIndex == -1)
	throw new Error('Unrecgonized event type');
	events[maxEventTypeInfo.metadata.name].push(event);
	});
	if (opt_pruneEmpty) {
	var prunedEvents = {};
	for (var eventType in events) {
	if (events[eventType].length > 0)
	prunedEvents[eventType] = events[eventType];
	}
	return prunedEvents;
	} else {
	return events;
	}
	},

	enumEventsOfType: function(type, func) {
	for (var i = 0; i < this.length_; i++)
	if (this[i] instanceof type)
	func(this[i]);
	},

	/**
	* Helper for selection previous or next.
	* @param {boolean} offset If positive, select one forward (next).
	* Else, select previous.
	*
	* @param {TimelineViewport} viewport The viewport to use to determine what
	* is near to the current selection.
	*
	* @return {boolean} true if current selection changed.
	*/
	getShiftedSelection: function(viewport, offset) {
	var newSelection = new Selection();
	for (var i = 0; i < this.length_; i++) {
	var event = this[i];

	var addEventToNewSelection = function(event) {
	};

	// If this is a flow event, and we have a next/prev item in the chain
	// then we use that as the item to move too. Otherwise, we let the
	// normal movement for a slice kick in and use that.
	if (event instanceof tv.c.trace_model.FlowEvent) {
	if ((offset > 0) && event.nextFlowEvent) {
	newSelection.push(event.nextFlowEvent);
	continue;
	} else if ((offset < 0) && event.previousFlowEvent) {
	newSelection.push(event.previousFlowEvent);
	continue;
	}
	}

	var track = viewport.trackForEvent(event);
	track.addItemNearToProvidedEventToSelection(
	event, offset, newSelection);
	}

	if (newSelection.length == 0)
	return undefined;
	return newSelection;
	},

	forEach: function(fn, opt_this) {
	for (var i = 0; i < this.length; i++)
	fn.call(opt_this, this[i], i);
	},

	map: function(fn, opt_this) {
	var res = [];
	for (var i = 0; i < this.length; i++)
	res.push(fn.call(opt_this, this[i], i));
	return res;
	},

	every: function(fn, opt_this) {
	for (var i = 0; i < this.length; i++)
	if (!fn.call(opt_this, this[i], i))
	return false;
	return true;
	},

	some: function(fn, opt_this) {
	for (var i = 0; i < this.length; i++)
	if (fn.call(opt_this, this[i], i))
	return true;
	return false;
	}
	};

	return {
	Selection: Selection,
	RequestSelectionChangeEvent: RequestSelectionChangeEvent
	};
	});
	</script>