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Add loadProject, setEditingTarget, and UI emits
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2 changed files with 84 additions and 0 deletions
76
src/index.js
76
src/index.js
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@ -101,6 +101,65 @@ VirtualMachine.prototype.postIOData = function (device, data) {
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}
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};
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/**
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* Load a project from a Scratch 2.0 JSON representation.
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* @param {string} json JSON string representing the project.
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*/
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VirtualMachine.prototype.loadProject = function (json) {
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// Select the first target for editing, e.g., the stage.
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this.editingTarget = this.runtime.targets[0];
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// Update the VM user's knowledge of targets and blocks on the workspace.
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this.emitTargetsUpdate();
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this.emitWorkspaceUpdate();
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};
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/**
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* Set an editing target. An editor UI can use this function to switch
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* between editing different targets, sprites, etc.
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* After switching the editing target, the VM may emit updates
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* to the list of targets and any attached workspace blocks
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* (see `emitTargetsUpdate` and `emitWorkspaceUpdate`).
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* @param {string} targetId Id of target to set as editing.
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*/
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VirtualMachine.prototype.setEditingTarget = function (targetId) {
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if (targetId == this.editingTarget.id) { // No change.
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return;
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}
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var target = this.runtime.getTargetById(targetId);
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if (target) {
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this.editingTarget = target;
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// Emit appropriate UI updates.
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this.emitTargetsUpdate();
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this.emitWorkspaceUpdate();
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}
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};
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/**
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* Emit metadata about available targets.
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* An editor UI could use this to display a list of targets and show
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* the currently editing one.
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*/
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VirtualMachine.prototype.emitTargetsUpdate = function () {
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this.emit('targetsUpdate', {
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// [[target id, human readable target name], ...].
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targetList: this.runtime.targets.map(function(target) {
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return [target.id, target.getName()];
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}),
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// Currently editing target id.
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editingTarget: this.editingTarget.id
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});
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};
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/**
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* Emit an Blockly/scratch-blocks compatible XML representation
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* of the current editing target's blocks.
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*/
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VirtualMachine.prototype.emitWorkspaceUpdate = function () {
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this.emit('workspaceUpdate', {
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'xml': this.editingTarget.blocks.toXML()
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});
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};
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/*
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* Worker handlers: for all public methods available above,
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* we must also provide a message handler in case the VM is run
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@ -155,6 +214,12 @@ if (ENV_WORKER) {
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case 'postIOData':
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self.vmInstance.postIOData(messageData.device, messageData.data);
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break;
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case 'setEditingTarget':
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self.vmInstance.setEditingTarget(messageData.targetId);
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break;
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case 'loadProject':
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self.vmInstance.loadProject(messageData.json);
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break;
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default:
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if (e.data.id == 'RendererConnected') {
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//initRenderWorker();
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@ -179,6 +244,17 @@ if (ENV_WORKER) {
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self.vmInstance.runtime.on(Runtime.VISUAL_REPORT, function (id, value) {
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self.postMessage({method: Runtime.VISUAL_REPORT, id: id, value: value});
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});
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self.vmInstance.on('workspaceUpdate', function(data) {
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self.postMessage({method: 'workspaceUpdate',
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xml: data.xml
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});
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});
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self.vmInstance.on('targetsUpdate', function(data) {
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self.postMessage({method: 'targetsUpdate',
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targetList: data.targetList,
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editingTarget: data.editingTarget
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});
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});
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}
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/**
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@ -76,6 +76,14 @@ VirtualMachine.prototype.animationFrame = function () {
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this.vmWorker.postMessage({method: 'animationFrame'});
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};
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VirtualMachine.prototype.loadProject = function (json) {
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this.vmWorker.postMessage({method: 'loadProject', json: json});
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};
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VirtualMachine.prototype.setEditingTarget = function (targetId) {
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this.vmWorker.postMessage({method: 'setEditingTarget', targetId: targetId});
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};
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/**
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* Export and bind to `window`
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*/
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