Initial commit

node_modules/node-blockly/blockly/accessible/commonModal.js

@@ -0,0 +1,77 @@
+goog.provide('Blockly.CommonModal');
+
+
+Blockly.CommonModal = function() {};
+
+Blockly.CommonModal.setupKeyboardOverrides = function(component) {
+  component.keyboardInputService.setOverride({
+    // Tab key: navigates to the previous or next item in the list.
+    '9': function(evt) {
+      evt.preventDefault();
+      evt.stopPropagation();
+
+      if (evt.shiftKey) {
+        // Move to the previous item in the list.
+        if (component.activeButtonIndex <= 0) {
+          component.activeActionButtonIndex = 0;
+          component.audioService.playOopsSound();
+        } else {
+          component.activeButtonIndex--;
+        }
+      } else {
+        // Move to the next item in the list.
+        if (component.activeButtonIndex == component.numInteractiveElements(component) - 1) {
+          component.audioService.playOopsSound();
+        } else {
+          component.activeButtonIndex++;
+        }
+      }
+
+      component.focusOnOption(component.activeButtonIndex, component);
+    },
+    // Escape key: closes the modal.
+    '27': function() {
+      component.dismissModal();
+    },
+    // Up key: no-op.
+    '38': function(evt) {
+      evt.preventDefault();
+    },
+    // Down key: no-op.
+    '40': function(evt) {
+      evt.preventDefault();
+    }
+  });
+}
+
+Blockly.CommonModal.getInteractiveElements = function(component) {
+  return Array.prototype.filter.call(
+    component.getInteractiveContainer().elements, function(element) {
+    if (element.type === 'hidden') {
+      return false;
+    }
+    if (element.disabled) {
+      return false;
+    }
+    if (element.tabIndex < 0) {
+      return false;
+    }
+    return true;
+  });
+};
+
+Blockly.CommonModal.numInteractiveElements = function(component) {
+  var elements = this.getInteractiveElements(component);
+  return elements.length;
+};
+
+Blockly.CommonModal.focusOnOption = function(index, component) {
+  var elements = this.getInteractiveElements(component);
+  var button = elements[index];
+  button.focus();
+};
+
+Blockly.CommonModal.hideModal = function() {
+  this.modalIsVisible = false;
+  this.keyboardInputService.clearOverride();
+};