1 files changed, 185 insertions, 0 deletions
diff --git a/src/blockly/core/warning.js b/src/blockly/core/warning.js
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+/**
+ * @license
+ * Visual Blocks Editor
+ *
+ * Copyright 2012 Google Inc.
+ * https://developers.google.com/blockly/
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Object representing a warning.
+ * @author fraser@google.com (Neil Fraser)
+ */
+'use strict';
+
+goog.provide('Blockly.Warning');
+
+goog.require('Blockly.Bubble');
+goog.require('Blockly.Icon');
+
+
+/**
+ * Class for a warning.
+ * @param {!Blockly.Block} block The block associated with this warning.
+ * @extends {Blockly.Icon}
+ * @constructor
+ */
+Blockly.Warning = function(block) {
+  Blockly.Warning.superClass_.constructor.call(this, block);
+  this.createIcon();
+  // The text_ object can contain multiple warnings.
+  this.text_ = {};
+};
+goog.inherits(Blockly.Warning, Blockly.Icon);
+
+/**
+ * Does this icon get hidden when the block is collapsed.
+ */
+Blockly.Warning.prototype.collapseHidden = false;
+
+/**
+ * Draw the warning icon.
+ * @param {!Element} group The icon group.
+ * @private
+ */
+Blockly.Warning.prototype.drawIcon_ = function(group) {
+  // Triangle with rounded corners.
+  Blockly.createSvgElement('path',
+      {'class': 'blocklyIconShape',
+       'd': 'M2,15Q-1,15 0.5,12L6.5,1.7Q8,-1 9.5,1.7L15.5,12Q17,15 14,15z'},
+       group);
+  // Can't use a real '!' text character since different browsers and operating
+  // systems render it differently.
+  // Body of exclamation point.
+  Blockly.createSvgElement('path',
+      {'class': 'blocklyIconSymbol',
+       'd': 'm7,4.8v3.16l0.27,2.27h1.46l0.27,-2.27v-3.16z'},
+       group);
+  // Dot of exclamation point.
+  Blockly.createSvgElement('rect',
+      {'class': 'blocklyIconSymbol',
+       'x': '7', 'y': '11', 'height': '2', 'width': '2'},
+       group);
+};
+
+/**
+ * Create the text for the warning's bubble.
+ * @param {string} text The text to display.
+ * @return {!SVGTextElement} The top-level node of the text.
+ * @private
+ */
+Blockly.Warning.textToDom_ = function(text) {
+  var paragraph = /** @type {!SVGTextElement} */ (
+      Blockly.createSvgElement('text',
+          {'class': 'blocklyText blocklyBubbleText',
+           'y': Blockly.Bubble.BORDER_WIDTH},
+          null));
+  var lines = text.split('\n');
+  for (var i = 0; i < lines.length; i++) {
+    var tspanElement = Blockly.createSvgElement('tspan',
+        {'dy': '1em', 'x': Blockly.Bubble.BORDER_WIDTH}, paragraph);
+    var textNode = document.createTextNode(lines[i]);
+    tspanElement.appendChild(textNode);
+  }
+  return paragraph;
+};
+
+/**
+ * Show or hide the warning bubble.
+ * @param {boolean} visible True if the bubble should be visible.
+ */
+Blockly.Warning.prototype.setVisible = function(visible) {
+  if (visible == this.isVisible()) {
+    // No change.
+    return;
+  }
+  Blockly.Events.fire(
+      new Blockly.Events.Ui(this.block_, 'warningOpen', !visible, visible));
+  if (visible) {
+    // Create the bubble to display all warnings.
+    var paragraph = Blockly.Warning.textToDom_(this.getText());
+    this.bubble_ = new Blockly.Bubble(
+        /** @type {!Blockly.WorkspaceSvg} */ (this.block_.workspace),
+        paragraph, this.block_.svgPath_, this.iconXY_, null, null);
+    if (this.block_.RTL) {
+      // Right-align the paragraph.
+      // This cannot be done until the bubble is rendered on screen.
+      var maxWidth = paragraph.getBBox().width;
+      for (var i = 0, textElement; textElement = paragraph.childNodes[i]; i++) {
+        textElement.setAttribute('text-anchor', 'end');
+        textElement.setAttribute('x', maxWidth + Blockly.Bubble.BORDER_WIDTH);
+      }
+    }
+    this.updateColour();
+    // Bump the warning into the right location.
+    var size = this.bubble_.getBubbleSize();
+    this.bubble_.setBubbleSize(size.width, size.height);
+  } else {
+    // Dispose of the bubble.
+    this.bubble_.dispose();
+    this.bubble_ = null;
+    this.body_ = null;
+  }
+};
+
+/**
+ * Bring the warning to the top of the stack when clicked on.
+ * @param {!Event} e Mouse up event.
+ * @private
+ */
+Blockly.Warning.prototype.bodyFocus_ = function(e) {
+  this.bubble_.promote_();
+};
+
+/**
+ * Set this warning's text.
+ * @param {string} text Warning text (or '' to delete).
+ * @param {string} id An ID for this text entry to be able to maintain
+ *     multiple warnings.
+ */
+Blockly.Warning.prototype.setText = function(text, id) {
+  if (this.text_[id] == text) {
+    return;
+  }
+  if (text) {
+    this.text_[id] = text;
+  } else {
+    delete this.text_[id];
+  }
+  if (this.isVisible()) {
+    this.setVisible(false);
+    this.setVisible(true);
+  }
+};
+
+/**
+ * Get this warning's texts.
+ * @return {string} All texts concatenated into one string.
+ */
+Blockly.Warning.prototype.getText = function() {
+  var allWarnings = [];
+  for (var id in this.text_) {
+    allWarnings.push(this.text_[id]);
+  }
+  return allWarnings.join('\n');
+};
+
+/**
+ * Dispose of this warning.
+ */
+Blockly.Warning.prototype.dispose = function() {
+  this.block_.warning = null;
+  Blockly.Icon.prototype.dispose.call(this);
+};