feat(keyboard): rewrite listeners to use event passed in context

With the new version of `diagram-js`, the keyboard listeners receive
a single parameter which is an object with `KeyboardEvent` event
as the only property. `BpmnKeyBindings` needed to change in order
to make use of new version of API.

lib/features/keyboard/BpmnKeyBindings.js

@@ -6,61 +6,119 @@
  */
 export default function BpmnKeyBindings(keyboard, editorActions) {
 
-  keyboard.addListener(function(key, modifiers) {
+  // ctrl + a -> select all elements
+  function selectAll(context) {
 
-    // ctrl + a -> select all elements
-    if (key === 65 && keyboard.isCmd(modifiers)) {
+    var event = context.event;
+
+    if (event.keyCode === 65 && keyboard.isCmd(event)) {
       editorActions.trigger('selectElements');
 
       return true;
     }
+  }
 
-    // ctrl + f -> search labels
-    if (key === 70 && keyboard.isCmd(modifiers)) {
+  // ctrl + f -> search labels
+  function find(context) {
+
+    var event = context.event;
+
+    if (event.keyCode === 70 && keyboard.isCmd(event)) {
       editorActions.trigger('find');
 
       return true;
     }
+  }
 
-    if (keyboard.hasModifier(modifiers)) {
+  // s -> activate space tool
+  function spaceTool(context) {
+
+    var event = context.event;
+
+    if (keyboard.hasModifier(event)) {
       return;
     }
 
-    // s -> activate space tool
-    if (key === 83) {
+    if (event.keyCode === 83) {
       editorActions.trigger('spaceTool');
 
       return true;
     }
+  }
 
-    // l -> activate lasso tool
-    if (key === 76) {
+  // l -> activate lasso tool
+  function lassoTool(context) {
+
+    var event = context.event;
+
+    if (keyboard.hasModifier(event)) {
+      return;
+    }
+
+    if (event.keyCode === 76) {
       editorActions.trigger('lassoTool');
 
       return true;
     }
+  }
 
-    // h -> activate hand tool
-    if (key === 72) {
+
+  // h -> activate hand tool
+  function handTool(context) {
+
+    var event = context.event;
+
+    if (keyboard.hasModifier(event)) {
+      return;
+    }
+
+    if (event.keyCode === 72) {
       editorActions.trigger('handTool');
 
       return true;
     }
+  }
 
-    // c -> activate global connect tool
-    if (key === 67) {
+  // c -> activate global connect tool
+  function globalConnectTool(context) {
+
+    var event = context.event;
+
+    if (keyboard.hasModifier(event)) {
+      return;
+    }
+
+    if (event.keyCode === 67) {
       editorActions.trigger('globalConnectTool');
 
       return true;
     }
+  }
 
-    // e -> activate direct editing
-    if (key === 69) {
+  // e -> activate direct editing
+  function directEditing(context) {
+
+    var event = context.event;
+
+    if (keyboard.hasModifier(event)) {
+      return;
+    }
+
+    if (event.keyCode === 69) {
       editorActions.trigger('directEditing');
 
       return true;
     }
-  });
+  }
+
+
+  keyboard.addListener(selectAll);
+  keyboard.addListener(find);
+  keyboard.addListener(spaceTool);
+  keyboard.addListener(lassoTool);
+  keyboard.addListener(handTool);
+  keyboard.addListener(globalConnectTool);
+  keyboard.addListener(directEditing);
 }
 
 BpmnKeyBindings.$inject = [