feat(keyboard): add tooling specific key bindings

* space tool -> [s]
* multi select -> [m]

related to bpmn-io/bpmn-js#244

lib/Modeler.js

@@ -129,12 +129,12 @@ Modeler.prototype._interactionModules = [
 
 Modeler.prototype._modelingModules = [
   // modeling components
-  require('diagram-js/lib/features/keyboard'),
   require('diagram-js/lib/features/move'),
   require('diagram-js/lib/features/bendpoints'),
   require('diagram-js/lib/features/resize'),
   require('diagram-js/lib/features/space-tool'),
   require('diagram-js/lib/features/lasso-tool'),
+  require('./features/keyboard'),
   require('./features/snapping'),
   require('./features/modeling'),
   require('./features/context-pad'),

lib/features/keyboard/BpmnKeyBindings.js

@@ -0,0 +1,30 @@
+'use strict';
+
+
+function BpmnKeyBindings(keyboard, spaceTool, lassoTool) {
+
+  keyboard.addListener(function(key, modifiers) {
+
+    if (keyboard.hasModifier(modifiers)) {
+      return;
+    }
+
+    // S -> activate space tool
+    if (key === 83) {
+      spaceTool.activateSelection();
+
+      return true;
+    }
+
+    // M -> activate multi select tool
+    if (key === 77) {
+      lassoTool.activateSelection();
+
+      return true;
+    }
+  });
+}
+
+BpmnKeyBindings.$inject = [ 'keyboard', 'spaceTool', 'lassoTool' ];
+
+module.exports = BpmnKeyBindings;

lib/features/keyboard/index.js

@@ -0,0 +1,7 @@
+module.exports = {
+  __depends__: [
+    require('diagram-js/lib/features/keyboard')
+  ],
+  __init__: [ 'bpmnKeyBindings' ],
+  bpmnKeyBindings: [ 'type', require('./BpmnKeyBindings') ]
+};