Applab: add fit property for images

apps/package.json

@@ -209,6 +209,7 @@
     "details-element-polyfill": "https://github.com/javan/details-element-polyfill",
     "filesaver.js": "0.2.0",
     "jszip": "3.0.0",
+    "object-fit-images": "^3.2.3",
     "query-string": "4.1.0",
     "react-dom-confetti": "^0.0.8",
     "react-hot-loader": "^1.3.1",

apps/src/applab/applab.js

@@ -68,6 +68,7 @@ import {getRandomDonorTwitter} from '../util/twitterHelper';
 
 import {TestResults, ResultType} from '../constants';
 import i18n from '../code-studio/i18n';
+import {applabObjectFitImages} from './applabObjectFitImages';
 
 /**
  * Create a namespace for the application.
@@ -350,6 +351,11 @@ Applab.init = function (config) {
   // Necessary for tests.
   thumbnailUtils.init();
 
+  // Enable polyfill so we can use object-fit (we must additionally specify
+  // the style in font-family and avoid scale-down & using it in media queries)
+  // See https://www.npmjs.com/package/object-fit-images for details.
+  applabObjectFitImages(null, { watchMQ: true });
+
   // replace studioApp methods with our own
   studioApp().reset = this.reset.bind(this);
   studioApp().runButtonClick = this.runButtonClick.bind(this);

apps/src/applab/applabObjectFitImages.js

@@ -0,0 +1,13 @@
+import objectFitImages from 'object-fit-images';
+
+/**
+ * Wrapper to objectFitImages() to avoid using it on phantomjs
+ * See https://github.com/bfred-it/object-fit-images/issues/11
+ */
+
+export function applabObjectFitImages(imgs, opts) {
+  if (/PhantomJS/.test(window.navigator.userAgent)) {
+    return;
+  }
+  objectFitImages(imgs, opts);
+}

apps/src/applab/commands.js

@@ -181,6 +181,8 @@ applabCommands.image = function (opts) {
   newImage.id = opts.elementId;
   newImage.style.position = 'relative';
 
+  Applab.updateProperty(newImage, 'objectFit', 'contain');
+
   return Boolean(Applab.activeScreen().appendChild(newImage));
 };
 

apps/src/applab/designElements/image.jsx

@@ -8,7 +8,9 @@ import ZOrderRow from './ZOrderRow';
 import EventHeaderRow from './EventHeaderRow';
 import EventRow from './EventRow';
 import {ICON_PREFIX_REGEX} from '../constants';
+import EnumPropertyRow from './EnumPropertyRow';
 import * as elementUtils from './elementUtils';
+import {applabObjectFitImages} from '../applabObjectFitImages';
 
 class ImageProperties extends React.Component {
   static propTypes = {
@@ -76,6 +78,12 @@ class ImageProperties extends React.Component {
           handleChange={this.props.handleChange.bind(this, 'picture')}
         />
         {iconColorPicker}
+        <EnumPropertyRow
+          desc={'fit image'}
+          initialValue={element.style.objectFit || 'fill'}
+          options={['fill','cover','contain','none']}
+          handleChange={this.props.handleChange.bind(this, 'objectFit')}
+        />
         <BooleanPropertyRow
           desc={'hidden'}
           initialValue={$(element).hasClass('design-mode-hidden')}
@@ -139,6 +147,17 @@ class ImageEvents extends React.Component {
   }
 }
 
+function setObjectFitStyles(element, value) {
+  // NOTE: neither of these will be saved (we strip these out when we serialize
+  // and rely on our custom data-object-fit attribute during save/load)
+
+  // Set a style for modern browsers:
+  element.style.objectFit = value;
+
+  // Set a style that will be picked up by objectFitImages() for old browsers:
+  element.style.fontFamily = `'object-fit: ${value};'`;
+  applabObjectFitImages(element);
+}
 
 export default {
   PropertyTab: ImageProperties,
@@ -151,6 +170,11 @@ export default {
     element.setAttribute('src', '/blockly/media/1x1.gif');
     element.setAttribute('data-canonical-image-url', '');
 
+    // New elements are created with 'contain', but the default value for
+    // existing (unadorned) images is 'fill' for compatibility reasons
+    element.setAttribute('data-object-fit', 'contain');
+    setObjectFitStyles(element, 'contain');
+
     return element;
   },
   onDeserialize: function (element, updateProperty) {
@@ -161,5 +185,28 @@ export default {
       element.setAttribute('src', '/blockly/media/1x1.gif');
       element.setAttribute('data-canonical-image-url', '');
     }
+    const objectFitValue = element.getAttribute('data-object-fit');
+    if (objectFitValue) {
+      setObjectFitStyles(element, objectFitValue);
+    }
+  },
+  onPropertyChange: function (element, name, value) {
+    switch (name) {
+      case 'objectFit':
+        element.setAttribute('data-object-fit', value);
+        setObjectFitStyles(element, value);
+        break;
+      default:
+        return false;
+    }
+    return true;
+  },
+  readProperty: function (element, name) {
+    switch (name) {
+      case 'objectFit':
+        return element.getAttribute('data-object-fit');
+      default:
+        throw `unknown property name ${name}`;
+    }
   }
 };

apps/src/applab/designMode.js

@@ -17,6 +17,7 @@ import logToCloud from '../logToCloud';
 import {actions} from './redux/applab';
 import * as screens from './redux/screens';
 import {getStore} from '../redux';
+import {applabObjectFitImages} from './applabObjectFitImages';
 
 var designMode = {};
 export default designMode;
@@ -318,38 +319,8 @@ designMode.updateProperty = function (element, name, value) {
 
       if (ICON_PREFIX_REGEX.test(value)) {
         element.src = assetPrefix.renderIconToString(value, element);
-        break;
-      }
-
-      element.src = assetPrefix.fixPath(value);
-      // do not resize if only the asset path has changed (e.g. on remix).
-      if (value !== originalValue) {
-        var resizeElement = function (width, height) {
-          element.style.width = width + 'px';
-          element.style.height = height + 'px';
-          if (gridUtils.isDraggableContainer(element.parentNode)) {
-            element.parentNode.style.width = width + 'px';
-            element.parentNode.style.height = height + 'px';
-          }
-          // Re-render properties
-          if (currentlyEditedElement === element) {
-            designMode.editElementProperties(element);
-          }
-        };
-        if (value === '') {
-          element.src = '/blockly/media/1x1.gif';
-          resizeElement(100, 100);
-        } else {
-          element.onload = function () {
-            // naturalWidth/Height aren't populated until image has loaded.
-            var left = parseFloat(element.style.left);
-            var top = parseFloat(element.style.top);
-            var dimensions = boundedResize(left, top, element.naturalWidth, element.naturalHeight, true);
-            resizeElement(dimensions.width, dimensions.height);
-            // only perform onload once
-            element.onload = null;
-          };
-        }
+      } else {
+        element.src = value === '' ? '/blockly/media/1x1.gif' : assetPrefix.fixPath(value);
       }
       break;
     case 'hidden':
@@ -664,6 +635,25 @@ designMode.serializeToLevelHtml = function () {
   });
   designModeVizClone.children().children().each(function () {
     elementUtils.removeIdPrefix(this);
+    if (this.nodeName === 'IMG') {
+      // Remove object-fit style and all styles and attributes used by the
+      // the object-fit-images polyfill for IE and replace the src attribute
+
+      // (We will rely on our own data-object-fit property for serialization)
+      this.style.objectFit = '';
+      this.style.backgroundPosition = '';
+      this.style.backgroundImage = '';
+      this.style.backgroundRepeat = '';
+      this.style.backgroundOrigin = '';
+      this.style.backgroundSize = '';
+      this.style.fontFamily = '';
+      this.removeAttribute('data-ofi-undefined');
+      const ofiSrc = this.getAttribute('data-ofi-src');
+      if (ofiSrc) {
+        this.src = ofiSrc;
+        this.removeAttribute('data-ofi-src');
+      }
+    }
   });
 
   // Remove the "data:img/png..." URI from icon images
@@ -936,6 +926,7 @@ function makeDraggable(jqueryElements) {
 
     elm.css('position', 'static');
   });
+  applabObjectFitImages();
 }
 
 /**

apps/src/applab/setPropertyDropdown.js

@@ -53,7 +53,8 @@ var PROP_INFO = {
   min: { friendlyName: 'min', internalName: 'min', type: 'number', defaultValue: '100' },
   max: { friendlyName: 'max', internalName: 'max', type: 'number', defaultValue: '100' },
   step: { friendlyName: 'step', internalName: 'step', type: 'number', defaultValue: '100' },
-  value: { friendlyName: 'value', internalName: 'value', type: 'uistring', defaultValue: '"text"' }
+  value: { friendlyName: 'value', internalName: 'value', type: 'uistring', defaultValue: '"text"' },
+  fit: { friendlyName: 'fit', internalName: 'objectFit', type: 'string', defaultValue: '"fill"' }
 };
 
 // When we don't know the element type, we display all possible friendly names
@@ -169,7 +170,8 @@ PROPERTIES[ElementType.IMAGE] = {
     'pictureImage',
     'picture', // Since this is an alias, it is not shown in the dropdown but is allowed as a value
     'iconColor',
-    'hidden'
+    'hidden',
+    'fit'
   ]
 };
 PROPERTIES[ElementType.CANVAS] = {
@@ -371,6 +373,8 @@ function getPropertyValueDropdown(param2) {
       return ['"red"', 'rgb(255,0,0)', 'rgb(255,0,0,0.5)', '"#FF0000"'];
     case "text-align":
       return ['"left"', '"right"', '"center"', '"justify"'];
+    case "fit":
+      return ['"fill"', '"cover"', '"contain"', '"none"'];
     case "hidden":
     case "checked":
     case "readonly":

apps/style/applab/skins/modern.scss

@@ -59,8 +59,7 @@
   }
 }
 
-#designModeViz.appModern, .draggingParent {
-
+#divApplab.notRunning, #designModeViz.appModern, .draggingParent {
   img[data-canonical-image-url=''], canvas, .chart {
     border: 5px solid #fff;
     box-sizing: border-box;
@@ -71,7 +70,8 @@
 
   img[data-canonical-image-url=''] {
     display: block;
-    background: #bdc3c7 url("/blockly/media/applab/placeholder_img.png") center center no-repeat;
+    // Using !important so that object-fit-images polyfill (which creates inline background styles) doesn't override the placeholder
+    background: #bdc3c7 url("/blockly/media/applab/placeholder_img.png") center center no-repeat !important;
   }
 
   canvas {

apps/test/integration/levelSolutions/applab/ec_design.js

@@ -581,8 +581,9 @@ module.exports = {
         assertPropertyRowExists(3, 'x position (px)', assert);
         assertPropertyRowExists(4, 'y position (px)', assert);
         assertPropertyRowExists(5, 'image Choose...', assert);
-        assertPropertyRowExists(6, 'hidden', assert);
-        assertPropertyRowExists(7, 'depth', assert);
+        assertPropertyRowExists(6, 'fit imagefillcovercontainnone', assert);
+        assertPropertyRowExists(7, 'hidden', assert);
+        assertPropertyRowExists(8, 'depth', assert);
 
         // Make sure it's draggable
         var manipulator = newImage.parent();
@@ -871,8 +872,6 @@ module.exports = {
 
         assert(/1x1.gif$/.test(designImage.src), 'src became 1x1.gif');
         assert.equal(designImage.getAttribute('data-canonical-image-url'), '');
-        assert.equal(designImage.style.width, '100px', 'width is reset');
-        assert.equal(designImage.style.height, '100px', 'height is reset');
 
         Applab.onPuzzleComplete();
       },

apps/test/integration/levelSolutions/applab/ec_uicontrols.js

@@ -127,6 +127,28 @@ module.exports = {
         testResult: TestResults.FREE_PLAY
       },
     },
+    {
+      description: "getProperty and setProperty for fit on images.",
+      editCode: true,
+      xml:
+          "image('idImage1', '');" +
+          "image('idImage2', '');" +
+          "image('idImage3', '');" +
+          "setProperty('idImage1', 'fit', 'cover');" +
+          "setProperty('idImage2', 'fit', getProperty('idImage1', 'fit'));",
+      runBeforeClick: function (assert) {
+        // add a completion on timeout since this is a freeplay level
+        tickWrapper.runOnAppTick(Applab, 2, function () {
+          assert(document.getElementById('idImage2').getAttribute('data-object-fit') === 'cover');
+          assert(document.getElementById('idImage3').getAttribute('data-object-fit') === 'contain');
+          Applab.onPuzzleComplete();
+        });
+      },
+      expected: {
+        result: true,
+        testResult: TestResults.FREE_PLAY
+      },
+    },
     {
       description: "button",
       editCode: true,

apps/yarn.lock

@@ -6556,6 +6556,10 @@ object-component@0.0.3:
   version "0.0.3"
   resolved "https://registry.yarnpkg.com/object-component/-/object-component-0.0.3.tgz#f0c69aa50efc95b866c186f400a33769cb2f1291"
 
+object-fit-images@^3.2.3:
+  version "3.2.3"
+  resolved "https://registry.yarnpkg.com/object-fit-images/-/object-fit-images-3.2.3.tgz#4089f6d0070a3b5563d3c1ab6f1b28d61331f0ac"
+
 object-is@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/object-is/-/object-is-1.0.1.tgz#0aa60ec9989a0b3ed795cf4d06f62cf1ad6539b6"