From 905d11c1065810b50afc410d3a24d1939998fada Mon Sep 17 00:00:00 2001
From: Hypnosphi <Filipp.Riabchun@jetbrains.com>
Date: Tue, 23 Jul 2019 14:29:09 +0200
Subject: [PATCH] Add offline mode

---
 README.md                                    |   5 +
 examples.md                                  |  34 ++++-
 src/executable-code/executable-fragment.js   | 132 ++++++++++---------
 src/executable-code/executable-fragment.monk |   4 +-
 src/executable-code/index.js                 |  95 ++++++-------
 src/index.js                                 |  10 +-
 6 files changed, 166 insertions(+), 114 deletions(-)

diff --git a/README.md b/README.md
index 10817b6b..090ea6de 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,11 @@ playground('.selector', options)
 
 ```
 
+**Options description:**
+
+- `server` — string, server where the code will be sent to be compiled and analyzed
+- `offline` — boolean, if true don't send any requests to server
+
 **Events description:**
 
 - `onChange(code)` — Fires every time the content of the editor is changed. Debounce time: 0.5s.
diff --git a/examples.md b/examples.md
index 39247e11..162d07a3 100644
--- a/examples.md
+++ b/examples.md
@@ -277,7 +277,39 @@ document.addEventListener('DOMContentLoaded', function() {
 });
 </script>
 ```
-Add additional hidden files:
+
+## Offline mode
+
+You can opt out of any server communication (code completion, execution, etc) by passing an `offline` flag:
+
+```html
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+  KotlinPlayground('.kotlin-playground', {offline: true});
+});
+</script>
+```
+
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+  KotlinPlayground('.kotlin-code-offline', {offline: true});
+});
+</script>
+<div class="kotlin-code-offline">
+
+```kotlin
+class Contact(val id: Int, var email: String) 
+
+fun main(args: Array<String>) {
+    val contact = Contact(1, "mary@gmail.com")
+    println(contact.id)
+}
+```
+
+</div>
+
+
+## Add additional hidden files:
 Put your files between `<textarea>` tag with class `hidden-dependency`.
 
 Look at example:
diff --git a/src/executable-code/executable-fragment.js b/src/executable-code/executable-fragment.js
index 40b47e1f..7eab2115 100644
--- a/src/executable-code/executable-fragment.js
+++ b/src/executable-code/executable-fragment.js
@@ -45,6 +45,7 @@ export default class ExecutableFragment extends ExecutableCodeTemplate {
       'directives': directives
     });
 
+    instance.offline = options.offline;
     instance.arrayClasses = [];
     instance.initialized = false;
     instance.state = {
@@ -60,20 +61,21 @@ export default class ExecutableFragment extends ExecutableCodeTemplate {
       instance.update({folded: !instance.state.folded});
     });
 
-    instance.on('keyup', (event) => {
-      if (window.navigator.appVersion.indexOf("Mac") !== -1) {
-        if (event.keyCode === KEY_CODES.R && event.ctrlKey) {
-          instance.execute();
-        }
-      } else {
-        if (event.keyCode === KEY_CODES.F9 && event.ctrlKey) {
-          instance.execute();
+    if (!options.offline) {
+      instance.on('keyup', (event) => {
+        if (window.navigator.appVersion.indexOf("Mac") !== -1) {
+          if (event.keyCode === KEY_CODES.R && event.ctrlKey) {
+            instance.execute();
+          }
+        } else {
+          if (event.keyCode === KEY_CODES.F9 && event.ctrlKey) {
+            instance.execute();
+          }
         }
-      }
-    });
+      });
+    }
 
-    const events = options.eventFunctions;
-    if (events && events.getInstance) events.getInstance(instance);
+    if (options.getInstance) options.getInstance(instance);
 
     return instance;
   }
@@ -241,6 +243,10 @@ export default class ExecutableFragment extends ExecutableCodeTemplate {
   }
 
   execute() {
+    if (this.offline) {
+      throw new Error('Can\'t execude code in offline mode');
+    }
+
     const {
       onOpenConsole, targetPlatform, waitingForOutput, compilerVersion, onRun, onError,
       args, theme, hiddenDependencies, onTestPassed, onTestFailed, onCloseConsole, jsLibs, outputHeight, getJsCode
@@ -418,58 +424,60 @@ export default class ExecutableFragment extends ExecutableCodeTemplate {
       codemirrorOptions.cursorBlinkRate = -1;
     }
 
-    /**
-     * Register own helper for autocomplete.
-     * Getting completions from try.kotlinlang.org.
-     * CodeMirror.hint.default => getting list from codemirror kotlin keywords.
-     *
-     * {@see WebDemoApi}      - getting data from WebDemo
-     * {@see CompletionView} - implementation completion view
-     */
-    CodeMirror.registerHelper('hint', 'kotlin', (mirror, callback) => {
-      let cur = mirror.getCursor();
-      let token = mirror.getTokenAt(cur);
-      let code = this.state.folded
-        ? this.prefix + mirror.getValue() + this.suffix
-        : mirror.getValue();
-      let currentCursor = this.state.folded
-        ? {line: cur.line + this.prefix.split('\n').length - 1, ch: cur.ch}
-        : cur;
-      WebDemoApi.getAutoCompletion(
-        code,
-        currentCursor,
-        this.state.compilerVersion,
-        this.state.targetPlatform,
-        this.state.hiddenDependencies,
-        processingCompletionsList
-      );
-
-      function processingCompletionsList(results) {
-        const anchorCharPosition = mirror.findWordAt({line: cur.line, ch: cur.ch}).anchor.ch;
-        const headCharPosition = mirror.findWordAt({line: cur.line, ch: cur.ch}).head.ch;
-        const currentSymbol = mirror.getRange({line: cur.line, ch: anchorCharPosition}, {
-          line: cur.line,
-          ch: headCharPosition
-        });
-        if (results.length === 0 && /^[a-zA-Z]+$/.test(currentSymbol)) {
-          CodeMirror.showHint(mirror, CodeMirror.hint.default, {completeSingle: false});
-        } else {
-          callback({
-            list: results.map(result => {
-              return new CompletionView(result)
-            }),
-            from: {line: cur.line, ch: token.start},
-            to: {line: cur.line, ch: token.end}
-          })
+    if (!this.offline) {
+      /**
+       * Register own helper for autocomplete.
+       * Getting completions from try.kotlinlang.org.
+       * CodeMirror.hint.default => getting list from codemirror kotlin keywords.
+       *
+       * {@see WebDemoApi}      - getting data from WebDemo
+       * {@see CompletionView} - implementation completion view
+       */
+      CodeMirror.registerHelper('hint', 'kotlin', (mirror, callback) => {
+        let cur = mirror.getCursor();
+        let token = mirror.getTokenAt(cur);
+        let code = this.state.folded
+          ? this.prefix + mirror.getValue() + this.suffix
+          : mirror.getValue();
+        let currentCursor = this.state.folded
+          ? {line: cur.line + this.prefix.split('\n').length - 1, ch: cur.ch}
+          : cur;
+        WebDemoApi.getAutoCompletion(
+          code,
+          currentCursor,
+          this.state.compilerVersion,
+          this.state.targetPlatform,
+          this.state.hiddenDependencies,
+          processingCompletionsList
+        );
+
+        function processingCompletionsList(results) {
+          const anchorCharPosition = mirror.findWordAt({line: cur.line, ch: cur.ch}).anchor.ch;
+          const headCharPosition = mirror.findWordAt({line: cur.line, ch: cur.ch}).head.ch;
+          const currentSymbol = mirror.getRange({line: cur.line, ch: anchorCharPosition}, {
+            line: cur.line,
+            ch: headCharPosition
+          });
+          if (results.length === 0 && /^[a-zA-Z]+$/.test(currentSymbol)) {
+            CodeMirror.showHint(mirror, CodeMirror.hint.default, {completeSingle: false});
+          } else {
+            callback({
+              list: results.map(result => {
+                return new CompletionView(result)
+              }),
+              from: {line: cur.line, ch: token.start},
+              to: {line: cur.line, ch: token.end}
+            })
+          }
         }
-      }
-    });
+      });
 
-    CodeMirror.hint.kotlin.async = true;
+      CodeMirror.hint.kotlin.async = true;
 
-    CodeMirror.commands.autocomplete = (cm) => {
-      CodeMirror.showHint(cm, CodeMirror.hint.kotlin);
-    };
+      CodeMirror.commands.autocomplete = (cm) => {
+        CodeMirror.showHint(cm, CodeMirror.hint.kotlin);
+      };
+    }
 
     this.codemirror = CodeMirror.fromTextArea(textarea, codemirrorOptions);
 
@@ -502,7 +510,7 @@ export default class ExecutableFragment extends ExecutableCodeTemplate {
       const {onChange, onFlyHighLight, compilerVersion, targetPlatform, hiddenDependencies} = this.state;
       if (onChange) onChange(cm.getValue());
       this.removeStyles();
-      if (onFlyHighLight) {
+      if (onFlyHighLight && !this.offline) {
         WebDemoApi.getHighlight(
           this.getCode(),
           compilerVersion,
diff --git a/src/executable-code/executable-fragment.monk b/src/executable-code/executable-fragment.monk
index e23c71a4..7e4be569 100644
--- a/src/executable-code/executable-fragment.monk
+++ b/src/executable-code/executable-fragment.monk
@@ -2,7 +2,7 @@
 
 <div class="executable-fragment-wrapper">
     <div class="executable-fragment {{ theme }}">
-      {% if (!highlightOnly) %}
+      {% if (!highlightOnly && !this.offline) %}
         <div class="run-button {{ waitingForOutput ? '_disabled' : ''}}" :onclick={{ this.execute.bind(this) }}></div>
       {% endif %}
         <div class="code-area {{ folded ? '_folded' : '_unfolded' }}">
@@ -42,7 +42,7 @@
         </div>
     </div>
 
-    {% if (!highlightOnly) %}
+    {% if (!highlightOnly && !this.offline) %}
         <div class="compiler-info">
             <span>Target platform: {{ targetPlatform.printableName }}</span>
             <span>Running on kotlin v. {{ compilerVersion }}</span>
diff --git a/src/executable-code/index.js b/src/executable-code/index.js
index cec26ac9..7e2f701d 100644
--- a/src/executable-code/index.js
+++ b/src/executable-code/index.js
@@ -65,9 +65,9 @@ export default class ExecutableCode {
   /**
    * @param {string|HTMLElement} target
    * @param {{compilerVersion: *}} [config]
-   * @param {Object} eventFunctions
+   * @param {Object} options
    */
-  constructor(target, config = {}, eventFunctions) {
+  constructor(target, config = {}, options) {
     const targetNode = typeof target === 'string' ? document.querySelector(target) : target;
     let highlightOnly = config.highlightOnly ? true
       : targetNode.getAttribute(ATTRIBUTES.HIGHLIGHT_ONLY) === READ_ONLY_TAG
@@ -104,7 +104,7 @@ export default class ExecutableCode {
     const mountNode = document.createElement('div');
     insertAfter(mountNode, targetNode);
 
-    const view = ExecutableFragment.render(mountNode, {eventFunctions});
+    const view = ExecutableFragment.render(mountNode, options);
     view.update(Object.assign({
       code: code,
       lines: lines,
@@ -126,8 +126,9 @@ export default class ExecutableCode {
       jsLibs: jsLibs,
       isFoldedButton: isFoldedButton,
       outputHeight
-    }, eventFunctions));
+    }, options));
 
+    this.offline = options && options.offline;
     this.config = cfg;
     this.node = mountNode;
     this.targetNode = targetNode;
@@ -135,7 +136,7 @@ export default class ExecutableCode {
     this.view = view;
 
     targetNode.KotlinPlayground = this;
-    if (eventFunctions && eventFunctions.callback) eventFunctions.callback(targetNode, mountNode);
+    if (options && options.callback) options.callback(targetNode, mountNode);
   }
 
   /**
@@ -235,10 +236,10 @@ export default class ExecutableCode {
 
   /**
    * @param {string|Node|NodeList} target
-   * @param {Function} eventFunctions
+   * @param {Function} options
    * @return {Promise<Array<ExecutableCode>>}
    */
-  static create(target, eventFunctions) {
+  static async create(target, options) {
     let targetNodes;
 
     if (typeof target === 'string') {
@@ -251,53 +252,59 @@ export default class ExecutableCode {
 
     // Return empty array if there is no nodes attach to
     if (targetNodes.length === 0) {
-      return Promise.resolve([]);
+      return [];
     }
 
-    return WebDemoApi.getCompilerVersions().then((versions) => {
-      const instances = [];
+    let versions = null;
+    if (!options.offline) {
+      versions = await WebDemoApi.getCompilerVersions();
+      if (versions == null) {
+        console.error('Can\'t get kotlin version from server');
+        options.offline = true
+      }
+    }
 
-      targetNodes.forEach((node) => {
-        const config = getConfigFromElement(node, true);
-        const minCompilerVersion = config.minCompilerVersion;
-        let latestStableVersion = null;
-        let compilerVersion = null;
+    const instances = [];
 
-        // Skip empty and already initialized nodes
-        if (
-          node.textContent.trim() === '' ||
-          node.getAttribute(INITED_ATTRIBUTE_NAME) === 'true'
-        ) {
-          return;
-        }
+    targetNodes.forEach((node) => {
+      const config = getConfigFromElement(node, true);
+      const minCompilerVersion = config.minCompilerVersion;
+      let latestStableVersion = null;
+      let compilerVersion = null;
 
-        if (versions) {
-          let listOfVersions = versions.map(version => version.version);
+      // Skip empty and already initialized nodes
+      if (
+        node.textContent.trim() === '' ||
+        node.getAttribute(INITED_ATTRIBUTE_NAME) === 'true'
+      ) {
+        return;
+      }
 
-          if (listOfVersions.includes(config.version)) {
-            compilerVersion = config.version;
-          } else {
-            versions.forEach((compilerConfig) => {
-              if (compilerConfig.latestStable) {
-                latestStableVersion = compilerConfig.version;
-              }
-            });
-            compilerVersion = latestStableVersion;
-          }
+      if (!options.offline && versions) {
+        let listOfVersions = versions.map(version => version.version);
 
-          if (minCompilerVersion) {
-            compilerVersion = minCompilerVersion > latestStableVersion
-              ? versions[versions.length - 1].version
-              : latestStableVersion;
-          }
-          instances.push(new ExecutableCode(node, {compilerVersion}, eventFunctions));
+        if (listOfVersions.includes(config.version)) {
+          compilerVersion = config.version;
         } else {
-          console.error('Cann\'t get kotlin version from server');
-          instances.push(new ExecutableCode(node, {highlightOnly: true}));
+          versions.forEach((compilerConfig) => {
+            if (compilerConfig.latestStable) {
+              latestStableVersion = compilerConfig.version;
+            }
+          });
+          compilerVersion = latestStableVersion;
         }
-      });
 
-      return instances;
+        if (minCompilerVersion) {
+          compilerVersion = minCompilerVersion > latestStableVersion
+            ? versions[versions.length - 1].version
+            : latestStableVersion;
+        }
+        instances.push(new ExecutableCode(node, {compilerVersion}, options));
+      } else {
+        instances.push(new ExecutableCode(node, {}, options));
+      }
     });
+
+    return instances;
   }
 }
diff --git a/src/index.js b/src/index.js
index 482a0089..093a4fb7 100644
--- a/src/index.js
+++ b/src/index.js
@@ -40,21 +40,21 @@ create.default = create;
  * @param {string} selector
  * @return {Promise<Array<ExecutableCode>>}
  */
-create.discourse = function (selector) {
+create.discourse = function (selector, options) {
   discoursePreviewPanelHandler();
-  return create(selector);
+  return create(selector, options);
 };
 
 // Auto initialization via data-selector <script> attribute
-const {selector, discourseSelector} = RUNTIME_CONFIG;
+const {selector, discourseSelector, offline} = RUNTIME_CONFIG;
 
 if (selector || discourseSelector) {
   document.addEventListener('DOMContentLoaded', () => {
     if (discourseSelector) {
-      create.discourse(discourseSelector);
+      create.discourse(discourseSelector, {offline});
       waitForNode(DiscourseSelectors.PREVIEW_PANEL, () => discoursePreviewPanelHandler());
     } else {
-      create(selector);
+      create(selector, {offline});
     }
   });
 }