From 7e73e9d7c99f4ed56a41017f5e4c9f7d55cc6964 Mon Sep 17 00:00:00 2001
From: jdotzki <joerg.dotzki@zalando.de>
Date: Mon, 7 Jul 2014 17:17:41 +0200
Subject: [PATCH] feat(features/label-editing): add touch based editing

Closes #84
---
 .../label-editing/LabelEditingProvider.js     |   9 +-
 lib/features/touch/TouchInteraction.js        | 286 ++++++++++--------
 lib/features/touch/index.js                   |   3 +
 .../label-editing/LabelEditingProviderSpec.js |  27 +-
 .../label-editing/TouchIntegrationSpec.js     |  55 ++++
 5 files changed, 243 insertions(+), 137 deletions(-)
 create mode 100644 test/spec/browser/features/label-editing/TouchIntegrationSpec.js

diff --git a/lib/features/label-editing/LabelEditingProvider.js b/lib/features/label-editing/LabelEditingProvider.js
index 2e31c4c7..845beee8 100644
--- a/lib/features/label-editing/LabelEditingProvider.js
+++ b/lib/features/label-editing/LabelEditingProvider.js
@@ -4,9 +4,8 @@ var _ = require('lodash');
 
 var UpdateTextHandler = require('./cmd/UpdateTextHandler');
 
-var LabelUtil = require('./LabelUtil');
-
-var DiUtil = require('../../util/Di');
+var LabelUtil = require('./LabelUtil'),
+    DiUtil = require('../../util/Di');
 
 
 var minBounds = {
@@ -20,7 +19,6 @@ function LabelEditingProvider(eventBus, canvas, directEditing, commandStack, bpm
   directEditing.registerProvider(this);
   commandStack.registerHandler('bpmnElement.updateText', UpdateTextHandler);
 
-
   // per default, listen to double click events
   eventBus.on('shape.dblclick', function(event) {
     directEditing.activate(event.element);
@@ -31,8 +29,7 @@ function LabelEditingProvider(eventBus, canvas, directEditing, commandStack, bpm
     directEditing.activate(event.element);
   });
 
-  // intercept direct canvas clicks to deselect all
-  // selected shapes
+  // intercept direct canvas clicks to deselect all selected shapes
   eventBus.on('canvas.click', function(event) {
     directEditing.complete();
   });
diff --git a/lib/features/touch/TouchInteraction.js b/lib/features/touch/TouchInteraction.js
index 7ecb0301..d2ccb572 100644
--- a/lib/features/touch/TouchInteraction.js
+++ b/lib/features/touch/TouchInteraction.js
@@ -5,7 +5,136 @@ var _ = require('lodash');
 
 function TouchInteraction(eventBus, canvas) {
 
+  var context;
+
   var RANGE = { min: 0.2, max: 4 };
+  var DOUBLE_TAP_THRESHOLD = 300; // ms
+
+  function handleTouchStart(event) {
+
+    var orgEvent = event.originalEvent ? event.originalEvent : event;
+
+    _.forEach(orgEvent.changedTouches, function (touch) {
+      context.start[touch.identifier] = touch;
+    });
+
+    if (orgEvent.touches.length === 1) {
+      initMove(orgEvent);
+    }
+
+    if (orgEvent.touches.length === 2) {
+      initScale(orgEvent);
+    }
+
+    //Stop all interaction for more than 2 touch sources
+    if (orgEvent.touches.length > 2) {
+      contextInit();
+    }
+
+    event.preventDefault();
+  }
+
+  function handleTouchMove(event) {
+    var orgEvent = event.originalEvent;
+    var cX = 0;
+    var cY = 0;
+    var mX = 0;
+    var mY = 0;
+
+    if (context.move && !context.scale) {
+
+      _.forEach(orgEvent.changedTouches, function (touch) {
+        if (touch.identifier === context.moveId) {
+          cX = touch.clientX;
+          cY = touch.clientY;
+        }
+      });
+
+      if (!context.lasttouch.cX) {
+        context.lasttouch.cX = cX;
+      }
+
+      if (!context.lasttouch.cY) {
+        context.lasttouch.cY = cY;
+      }
+
+      mX = cX - context.lasttouch.cX;
+      mY = cY - context.lasttouch.cY;
+
+      canvas.scroll({
+        dx: mX,
+        dy: mY
+      });
+
+      context.lasttouch.cX = cX;
+      context.lasttouch.cY = cY;
+    }
+
+    if (context.scale) {
+      var dist = euclideanDistance(orgEvent.touches[0], orgEvent.touches[1]);
+      var distRatio = dist / context.start.dist;
+
+      zoom(distRatio * context.start.zoom, context.start.mid);
+      context.lastDistance = dist;
+    }
+
+    // prevent select
+    event.preventDefault();
+  }
+
+  function handleTouchEnd(event) {
+
+    var orgEvent = event.originalEvent;
+
+    if (orgEvent.touches.length < 1) {
+      contextInit();
+    }
+    if (orgEvent.touches.length === 1) {
+      initMove(orgEvent);
+    }
+    if (orgEvent.touches.length === 2) {
+      initScale(orgEvent);
+    }
+
+    _.forEach(orgEvent.changedTouches, function (touch) {
+      delete context[touch.identifier];
+    });
+
+    // prevent select
+    event.preventDefault();
+  }
+
+  function init(element) {
+
+    contextInit();
+
+    //--- general handlers
+    $(element).on('touchstart', handleTouchStart);
+    $(element).on('touchmove', handleTouchMove);
+    $(document).on('touchend', handleTouchEnd);
+
+
+    //--- snap handler
+
+    eventBus.on('shape.touchstart', function(event) {
+      // ---
+      // TODO must forwarded to touchstart???#
+      handleTouchStart(event);
+    });
+
+    eventBus.on('shape.touchend', function(event) {
+
+      if(event.touches.length !== 0) {
+        return;
+      }
+
+      if((Date.now() - context.lastTap.time) < DOUBLE_TAP_THRESHOLD) {
+        eventBus.fire('shape.dbltap', event);
+      }
+
+      context.lastTap.time = Date.now();
+    });
+  }
 
   function cap(scale) {
     return Math.max(RANGE.min, Math.min(RANGE.max, scale));
@@ -27,139 +156,36 @@ function TouchInteraction(eventBus, canvas) {
     return dist;
   }
 
-  function init(element) {
-
-    function contextInit() {
-      context = {
-        start: {}
+  function initMove(orgEvent) {
+    context.move = true;
+    context.moveId = orgEvent.touches[0].identifier;
+    context.scale = false;
+    if (!context.lasttouch) {
+      context.lasttouch = {
+        cX: undefined,
+        cY: undefined,
+        mX: 0,
+        mY: 0
       };
     }
+  }
 
-    var context;
-    contextInit();
+  function initScale(orgEvent) {
+    context.scale = true;
+    context.start.dist = euclideanDistance(orgEvent.touches[0], orgEvent.touches[1]);
+    context.lastDistance = context.start.dist;
+    context.start.zoom = canvas.zoom();
+    context.start.mid = {
+      x: (orgEvent.touches[0].clientX + orgEvent.touches[1].clientX) / 2,
+      y: (orgEvent.touches[0].clientY + orgEvent.touches[1].clientY) / 2
+    };
+  }
 
-    function handleTouchMove(event) {
-      var orgEvent = event.originalEvent;
-      var cX = 0;
-      var cY = 0;
-      var mX = 0;
-      var mY = 0;
-
-      if (context.move && !context.scale) {
-
-        _.forEach(orgEvent.changedTouches, function (touch) {
-          if (touch.identifier === context.moveId) {
-            cX = touch.clientX;
-            cY = touch.clientY;
-          }
-        });
-
-        if (!context.lasttouch.cX) {
-          context.lasttouch.cX = cX;
-        }
-
-        if (!context.lasttouch.cY) {
-          context.lasttouch.cY = cY;
-        }
-
-        mX = cX - context.lasttouch.cX;
-        mY = cY - context.lasttouch.cY;
-
-        canvas.scroll({
-          dx: mX,
-          dy: mY
-        });
-
-        context.lasttouch.cX = cX;
-        context.lasttouch.cY = cY;
-      }
-
-      if (context.scale) {
-        var dist = euclideanDistance(orgEvent.touches[0], orgEvent.touches[1]);
-        var distRatio = dist / context.start.dist;
-
-        zoom(distRatio * context.start.zoom, context.start.mid);
-        context.lastDistance = dist;
-      }
-
-      // prevent select
-      event.preventDefault();
-    }
-
-    function handleTouchEnd(event) {
-
-      var orgEvent = event.originalEvent;
-
-      if (orgEvent.touches.length < 1) {
-        contextInit();
-      }
-      if (orgEvent.touches.length === 1) {
-        initMove(orgEvent);
-      }
-      if (orgEvent.touches.length === 2) {
-        initScale(orgEvent);
-      }
-
-      _.forEach(orgEvent.changedTouches, function (touch) {
-        delete context[touch.identifier];
-      });
-
-      // prevent select
-      event.preventDefault();
-    }
-
-    function initMove(orgEvent) {
-      context.move = true;
-      context.moveId = orgEvent.touches[0].identifier;
-      context.scale = false;
-      if (!context.lasttouch) {
-        context.lasttouch = {
-          cX: undefined,
-          cY: undefined,
-          mX: 0,
-          mY: 0
-        };
-      }
-    }
-
-    function initScale(orgEvent) {
-      context.scale = true;
-      context.start.dist = euclideanDistance(orgEvent.touches[0], orgEvent.touches[1]);
-      context.lastDistance = context.start.dist;
-      context.start.zoom = canvas.zoom();
-      context.start.mid = {
-        x: (orgEvent.touches[0].clientX + orgEvent.touches[1].clientX) / 2,
-        y: (orgEvent.touches[0].clientY + orgEvent.touches[1].clientY) / 2
-      };
-    }
-
-    function handleTouchStart(event) {
-
-      var orgEvent = event.originalEvent;
-
-      _.forEach(orgEvent.changedTouches, function (touch) {
-        context.start[touch.identifier] = touch;
-      });
-
-      if (orgEvent.touches.length === 1) {
-        initMove(orgEvent);
-      }
-
-      if (orgEvent.touches.length === 2) {
-        initScale(orgEvent);
-      }
-
-      //Stop all interaction for more than 2 touch sources
-      if (orgEvent.touches.length > 2) {
-        contextInit();
-      }
-
-      event.preventDefault();
-    }
-
-    $(element).on('touchstart', handleTouchStart);
-    $(element).on('touchmove', handleTouchMove);
-    $(document).on('touchend', handleTouchEnd);
+  function contextInit() {
+    context = {
+      start: {},
+      lastTap: {}
+    };
   }
 
   eventBus.on('canvas.init', function(e) {
@@ -167,6 +193,6 @@ function TouchInteraction(eventBus, canvas) {
   });
 }
 
-TouchInteraction.$inject = ['eventBus', 'canvas'];
+TouchInteraction.$inject = [ 'eventBus', 'canvas', 'touchFix' ];
 
 module.exports = TouchInteraction;
\ No newline at end of file
diff --git a/lib/features/touch/index.js b/lib/features/touch/index.js
index 86309fa9..605aa198 100644
--- a/lib/features/touch/index.js
+++ b/lib/features/touch/index.js
@@ -1,4 +1,7 @@
 module.exports = {
+  __depends__: [
+    require('diagram-js/lib/features/touch')
+  ],
   __init__: [ 'touchInteraction' ],
   touchInteraction: [ 'type', require('./TouchInteraction') ]
 };
\ No newline at end of file
diff --git a/test/spec/browser/features/label-editing/LabelEditingProviderSpec.js b/test/spec/browser/features/label-editing/LabelEditingProviderSpec.js
index 3343bf7d..334880d2 100644
--- a/test/spec/browser/features/label-editing/LabelEditingProviderSpec.js
+++ b/test/spec/browser/features/label-editing/LabelEditingProviderSpec.js
@@ -44,7 +44,7 @@ describe('features - label-editing', function() {
     }));
 
 
-    it('should cancel on ESC', inject(function(elementRegistry, bpmnRegistry, directEditing, eventBus) {
+    it('should cancel on <ESC>', inject(function(elementRegistry, bpmnRegistry, directEditing, eventBus) {
 
       // given
       var shape = elementRegistry.getById('task-nested-embedded');
@@ -68,6 +68,31 @@ describe('features - label-editing', function() {
       expect(task.name).toBe(oldName);
     }));
 
+
+    it('should submit on <canvas.click>', inject(function(elementRegistry, bpmnRegistry, directEditing, eventBus) {
+
+      // given
+      var shape = elementRegistry.getById('task-nested-embedded');
+      var task = bpmnRegistry.getSemantic('task-nested-embedded');
+
+      // activate
+      eventBus.fire('shape.dblclick', { element: shape });
+
+      var newName = 'new value';
+
+      // a jQuery <textarea /> element
+      var textarea = directEditing._textbox.textarea;
+
+      // when
+      // change + <canvas.click>
+      textarea.val(newName);
+      eventBus.fire('canvas.click', {});
+
+      // then
+      expect(directEditing.isActive()).toBe(false);
+      expect(task.name).toBe(newName);
+    }));
+
   });
 
 
diff --git a/test/spec/browser/features/label-editing/TouchIntegrationSpec.js b/test/spec/browser/features/label-editing/TouchIntegrationSpec.js
new file mode 100644
index 00000000..1a6c34c4
--- /dev/null
+++ b/test/spec/browser/features/label-editing/TouchIntegrationSpec.js
@@ -0,0 +1,55 @@
+'use strict';
+
+var Matchers = require('../../../Matchers'),
+    TestHelper = require('../../../TestHelper');
+
+/* global bootstrapBpmnJS, inject */
+
+
+var fs = require('fs');
+
+var Modeler = require('../../../../../lib/Modeler');
+
+var labelEditingModule = require('../../../../../lib/features/label-editing'),
+    touchModule = require('diagram-js/lib/features/touch');
+
+
+describe('direct editing - touch integration', function() {
+
+  beforeEach(Matchers.add);
+
+
+  var container;
+
+  beforeEach(function() {
+    container = jasmine.getEnv().getTestContainer();
+  });
+
+
+  function createModeler(xml, done) {
+    var modeler = new Modeler({ container: container });
+
+    modeler.importXML(xml, function(err) {
+      done(err, modeler);
+    });
+  }
+
+
+  it('should work on modeler (manual test)', function(done) {
+    var xml = fs.readFileSync('test/fixtures/bpmn/simple.bpmn', 'utf8');
+    createModeler(xml, done);
+  });
+
+
+  describe('event integration', function() {
+
+    var diagramXML = fs.readFileSync('test/fixtures/bpmn/features/label-editing/labels.bpmn', 'utf-8');
+
+    var testModules = [ labelEditingModule, touchModule ];
+
+    beforeEach(bootstrapBpmnJS(diagramXML, { modules: testModules }));
+
+    it('should work via dbltap (manual test)', function() { });
+  });
+
+});
\ No newline at end of file