/// <summary>
/// Define blocks from imported block definitions.
/// </summary>
/// <param name="blockDefsString"></param> Block definition(s).
/// <param name="format"> Block definition format ("JSON" or "JavaScript").</param>
/// <returns>Array of block types defined.</returns>
public static JsArray <string> defineAndGetBlockTypes(string blockDefsString, string format)
{
var blockTypes = new JsArray <string>();
// Define blocks and get block types.
if (format == "JSON")
{
var blockDefArray = FactoryUtils.parseJsonBlockDefinitions(blockDefsString);
// Populate array of blocktypes and define each block.
for (var i = 0; i < blockDefArray.Length; i++)
{
var blockDef = blockDefArray[i];
var json = (Dictionary <string, object>)JSON.Parse(blockDef);
blockTypes.Push((string)json["type"]);
// Define the block.
Blockly.Core.Blocks.Add((string)json["type"], blockDef);
}
}
else if (format == "JavaScript")
{
var blockDefArray = FactoryUtils.parseJsBlockDefinitions(blockDefsString);
// Populate array of block types.
for (var i = 0; i < blockDefArray.Length; i++)
{
var blockDef = blockDefArray[i];
var blockType = FactoryUtils.getBlockTypeFromJsDefinition(blockDef);
blockTypes.Push(blockType);
}
// Define all blocks.
Script.Eval(blockDefsString);
}
return(blockTypes);
}
/// <summary>
/// Generate selector dom from block library storage. For each block in the
/// library, it has a block option, which consists of a checkbox, a label,
/// and a fixed size preview workspace.
/// </summary>
/// <param name="blockLibStorage"> Block Library Storage object.</param>
/// <param name="blockSelectorId"> ID of the div element that will contain
/// the block options.</param>
/// <returns>Map of block type to Block Option object.</returns>
public Dictionary <string, BlockOption> createBlockSelectorFromLib(BlockLibraryStorage blockLibStorage, string blockSelectorId)
{
// Object mapping each stored block type to XML.
var allBlockTypes = blockLibStorage.getBlockTypes();
var blockXmlMap = blockLibStorage.getBlockXmlMap(allBlockTypes);
// Define the custom blocks in order to be able to create instances of
// them in the exporter workspace.
this.addBlockDefinitions(blockXmlMap);
var blockSelector = Document.GetElementById(blockSelectorId);
// Clear the block selector.
Node child;
while ((child = blockSelector.FirstChild) != null)
{
blockSelector.RemoveChild(child);
}
// Append each block option's dom to the selector.
var blockOptions = new Dictionary <string, BlockOption>();
foreach (var blockType in blockXmlMap.Keys)
{
// Get preview block's XML.
var block = FactoryUtils.getDefinedBlock(blockType, this.hiddenWorkspace);
var previewBlockXml = Blockly.Xml.workspaceToDom(this.hiddenWorkspace);
// Create block option, inject block into preview workspace, and append
// option to block selector.
var blockOpt = new BlockOption(blockSelector, blockType, previewBlockXml);
blockOpt.createDom();
blockSelector.AppendChild(blockOpt.dom);
blockOpt.showPreviewBlock();
blockOptions[blockType] = blockOpt;
}
return(blockOptions);
}
/// <summary>
/// Saves current block to local storage and updates dropdown.
/// </summary>
public void saveToBlockLibrary()
{
var blockType = this.getCurrentBlockType();
// If user has not changed the name of the starter block.
if (blockType == "block_type")
{
// Do not save block if it has the default type, "block_type".
Window.Alert("You cannot save a block under the name \"block_type\". Try changing " +
"the name before saving. Then, click on the \"Block Library\" button " +
"to view your saved blocks.");
return;
}
// Create block XML.
var xmlElement = goog.dom.createDom("xml");
var block = FactoryUtils.getRootBlock(BlockFactory.mainWorkspace);
xmlElement.AppendChild(Blockly.Xml.blockToDomWithXY(block));
// Do not add option again if block type is already in library.
if (!this.has(blockType))
{
this.view.addOption(blockType, true);
}
// Save block.
this.storage.addBlock(blockType, xmlElement);
this.storage.saveToLocalStorage();
// Show saved block without other stray blocks sitting in Block Factory's
// main workspace.
this.openBlock(blockType);
// Add select handler to the new option.
this.addOptionSelectHandler(blockType);
}
/// <summary>
/// Pulls information about all blocks in the block library to generate XML
/// for the selector workpace's toolbox.
/// </summary>
/// <param name="blockLibStorage"> Block Library Storage object.</param>
/// <returns>XML representation of the toolbox.</returns>
Element generateToolboxFromLibrary(BlockLibraryStorage blockLibStorage)
{
// Create DOM for XML.
var xmlDom = goog.dom.createDom("xml", new Dictionary <string, string> {
{ "id", "blockExporterTools_toolbox" },
{ "style", "display:none" }
});
var allBlockTypes = blockLibStorage.getBlockTypes();
// Object mapping block type to XML.
var blockXmlMap = blockLibStorage.getBlockXmlMap(allBlockTypes);
// Define the custom blocks in order to be able to create instances of
// them in the exporter workspace.
this.addBlockDefinitions(blockXmlMap);
foreach (var blockType in blockXmlMap.Keys)
{
// Get block.
var block = FactoryUtils.getDefinedBlock(blockType, this.hiddenWorkspace);
var category = FactoryUtils.generateCategoryXml(new JsArray <Blockly.Block> {
block
}, blockType);
xmlDom.AppendChild(category);
}
// If there are no blocks in library and the map is empty, append dummy
// category.
if (blockXmlMap.Count == 0)
{
var category = goog.dom.createDom("category");
category.SetAttribute("name", "Next Saved Block");
xmlDom.AppendChild(category);
}
return(xmlDom);
}
/// <summary>
/// Update the preview display.
/// </summary>
public static void updatePreview()
{
// Toggle between LTR/RTL if needed (also used in first display).
var newDir = ((HTMLSelectElement)Document.GetElementById("direction")).Value;
if (BlockFactory.oldDir != newDir)
{
if (BlockFactory.previewWorkspace != null)
{
BlockFactory.previewWorkspace.dispose();
}
var rtl = newDir == "rtl";
BlockFactory.previewWorkspace = Blockly.Core.inject("preview", new Dictionary <string, object> {
{ "rtl", rtl },
{ "media", "../../media/" },
{ "scrollbars", true }
});
BlockFactory.oldDir = newDir;
}
BlockFactory.previewWorkspace.clear();
// Fetch the code and determine its format (JSON or JavaScript).
var format = ((HTMLSelectElement)Document.GetElementById("format")).Value;
string code;
if (format == "Manual")
{
code = ((HTMLTextAreaElement)Document.GetElementById("languageTA")).Value;
// If the code is JSON, it will parse, otherwise treat as JS.
try {
JSON.Parse(code);
format = "JSON";
}
catch (Exception) {
format = "JavaScript";
}
}
else
{
code = Document.GetElementById("languagePre").TextContent;
}
if (String.IsNullOrEmpty(code.Trim()))
{
// Nothing to render. Happens while cloud storage is loading.
return;
}
// Backup Blockly.Core.Blocks object so that main workspace and preview don't
// collide if user creates a "factory_base" block, for instance.
var backupBlocks = Blockly.Core.Blocks;
try {
// Make a shallow copy.
Blockly.Core.Blocks = new Blockly.Blocks();
foreach (var prop in backupBlocks.Keys)
{
Blockly.Core.Blocks[prop] = backupBlocks[prop];
}
if (format == "JSON")
{
var json = (Dictionary <string, object>)JSON.Parse(code);
Blockly.Core.Blocks.Add(json.ContainsKey("type") ? (string)json["type"] : BlockFactory.UNNAMED, code);
}
else if (format == "JavaScript")
{
Script.Eval(code);
}
else
{
throw new Exception("Unknown format: " + format);
}
// Look for a block on Blockly.Core.Blocks that does not match the backup.
string blockType = null;
foreach (var type in Blockly.Core.Blocks.Keys)
{
if (!backupBlocks.ContainsKey(type) || Blockly.Core.Blocks[type] != backupBlocks[type])
{
blockType = type;
break;
}
}
if (String.IsNullOrEmpty(blockType))
{
return;
}
// Create the preview block.
var previewBlock = (Blockly.BlockSvg)BlockFactory.previewWorkspace.newBlock(blockType);
previewBlock.initSvg();
previewBlock.render();
previewBlock.setMovable(false);
previewBlock.setDeletable(false);
previewBlock.moveBy(15, 10);
BlockFactory.previewWorkspace.clearUndo();
BlockFactory.updateGenerator(previewBlock);
// Warn user only if their block type is already exists in Blockly's
// standard library.
var rootBlock = FactoryUtils.getRootBlock(BlockFactory.mainWorkspace);
if (Array.IndexOf(StandardCategories.coreBlockTypes, blockType) != -1)
{
rootBlock.setWarningText("A core Blockly block already exists " +
"under this name.");
}
else if (blockType == "block_type")
{
// Warn user to let them know they can't save a block under the default
// name "block_type"
rootBlock.setWarningText("You cannot save a block with the default " +
"name, \"block_type\"");
}
else
{
rootBlock.setWarningText(null);
}
}
finally {
Blockly.Core.Blocks = backupBlocks;
}
}
/// <summary>
/// Called on each tab click. Hides and shows specific content based on which tab
/// (Block Factory, Workspace Factory, or Exporter) is selected.
/// </summary>
public void onTab()
{
// Get tab div elements.
var blockFactoryTab = this.tabMap[AppController.BLOCK_FACTORY];
var exporterTab = this.tabMap[AppController.EXPORTER];
var workspaceFactoryTab = this.tabMap[AppController.WORKSPACE_FACTORY];
// Warn user if they have unsaved changes when leaving Block Factory.
if (this.lastSelectedTab == AppController.BLOCK_FACTORY &&
this.selectedTab != AppController.BLOCK_FACTORY)
{
var hasUnsavedChanges =
!FactoryUtils.savedBlockChanges(this.blockLibraryController);
if (hasUnsavedChanges &&
!Window.Confirm("You have unsaved changes in Block Factory."))
{
// If the user doesn't want to switch tabs with unsaved changes,
// stay on Block Factory Tab.
this.setSelected_(AppController.BLOCK_FACTORY);
this.lastSelectedTab = AppController.BLOCK_FACTORY;
return;
}
}
// Only enable key events in workspace factory if workspace factory tab is
// selected.
this.workspaceFactoryController.keyEventsEnabled =
this.selectedTab == AppController.WORKSPACE_FACTORY;
// Turn selected tab on and other tabs off.
this.styleTabs_();
if (this.selectedTab == AppController.EXPORTER)
{
// Hide other tabs.
FactoryUtils.hide("workspaceFactoryContent");
FactoryUtils.hide("blockFactoryContent");
// Show exporter tab.
FactoryUtils.show("blockLibraryExporter");
// Need accurate state in order to know which blocks are used in workspace
// factory.
this.workspaceFactoryController.saveStateFromWorkspace();
// Update exporter's list of the types of blocks used in workspace factory.
var usedBlockTypes = this.workspaceFactoryController.getAllUsedBlockTypes();
this.exporter.setUsedBlockTypes(usedBlockTypes);
// Update exporter's block selector to reflect current block library.
this.exporter.updateSelector();
// Update the exporter's preview to reflect any changes made to the blocks.
this.exporter.updatePreview();
}
else if (this.selectedTab == AppController.BLOCK_FACTORY)
{
// Hide other tabs.
FactoryUtils.hide("blockLibraryExporter");
FactoryUtils.hide("workspaceFactoryContent");
// Show Block Factory.
FactoryUtils.show("blockFactoryContent");
}
else if (this.selectedTab == AppController.WORKSPACE_FACTORY)
{
// Hide other tabs.
FactoryUtils.hide("blockLibraryExporter");
FactoryUtils.hide("blockFactoryContent");
// Show workspace factory container.
FactoryUtils.show("workspaceFactoryContent");
// Update block library category.
var categoryXml = this.exporter.getBlockLibraryCategory();
var blockTypes = this.blockLibraryController.getStoredBlockTypes();
this.workspaceFactoryController.setBlockLibCategory(categoryXml,
blockTypes);
}
// Resize to render workspaces" toolboxes correctly for all tabs.
Window.DispatchEvent(new Event("resize"));
}
/// <summary>
/// Returns field strings and any config.
/// </summary>
/// <param name="block">Input block.</param>
/// <returns>Field strings.</returns>
private static JsArray <string> getFieldsJs_(Blockly.Block block)
{
var fields = new JsArray <string>();
while (block != null)
{
if (!block.disabled && !block.getInheritedDisabled())
{
switch (block.type)
{
case "field_static":
// Result: "hello"
fields.Push(FactoryUtils.escapeString(block.getFieldValue("TEXT")));
break;
case "field_input":
// Result: new Blockly.FieldTextInput("Hello"), "GREET"
fields.Push("new Blockly.FieldTextInput(" +
FactoryUtils.escapeString(block.getFieldValue("TEXT")) + "), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
break;
case "field_number":
// Result: new Blockly.FieldNumber(10, 0, 100, 1), "NUMBER"
var args = new JsArray <double> {
Script.ParseFloat(block.getFieldValue("VALUE")),
Script.ParseFloat(block.getFieldValue("MIN")),
Script.ParseFloat(block.getFieldValue("MAX")),
Script.ParseFloat(block.getFieldValue("PRECISION"))
};
// Remove any trailing arguments that aren't needed.
if (args[3] == 0)
{
args.Pop();
if (args[2] == Double.PositiveInfinity)
{
args.Pop();
if (args[1] == Double.NegativeInfinity)
{
args.Pop();
}
}
}
fields.Push("new Blockly.FieldNumber(" + args.Join(", ") + "), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
break;
case "field_angle":
// Result: new Blockly.FieldAngle(90), "ANGLE"
fields.Push("new Blockly.FieldAngle(" +
Script.ParseFloat(block.getFieldValue("ANGLE")) + "), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
break;
case "field_checkbox":
// Result: new Blockly.FieldCheckbox("TRUE"), "CHECK"
fields.Push("new Blockly.FieldCheckbox(" +
FactoryUtils.escapeString(block.getFieldValue("CHECKED")) +
"), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
break;
case "field_colour":
// Result: new Blockly.FieldColour("#ff0000"), "COLOUR"
fields.Push("new Blockly.FieldColour(" +
FactoryUtils.escapeString(block.getFieldValue("COLOUR")) +
"), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
break;
case "field_date":
// Result: new Blockly.FieldDate("2015-02-04"), "DATE"
fields.Push("new Blockly.FieldDate(" +
FactoryUtils.escapeString(block.getFieldValue("DATE")) + "), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
break;
case "field_variable":
// Result: new Blockly.FieldVariable("item"), "VAR"
var varname
= FactoryUtils.escapeString(block.getFieldValue("TEXT") ?? null);
fields.Push("new Blockly.FieldVariable(" + varname + "), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
break;
case "field_dropdown":
// Result:
// new Blockly.FieldDropdown([["yes", "1"], ["no", "0"]]), "TOGGLE"
var options = new JsArray <string>();
for (var i = 0; i < ((FieldDropdown)block).optionCount_; i++)
{
options[i] = "[" +
FactoryUtils.escapeString(block.getFieldValue("USER" + i)) +
", " +
FactoryUtils.escapeString(block.getFieldValue("CPU" + i)) + "]";
}
if (options.Length > 0)
{
fields.Push("new Blockly.FieldDropdown([" +
options.Join(", ") + "]), " +
FactoryUtils.escapeString(block.getFieldValue("FIELDNAME")));
}
break;
case "field_image":
// Result: new Blockly.FieldImage("http://...", 80, 60)
var src = FactoryUtils.escapeString(block.getFieldValue("SRC"));
var width = Convert.ToDouble(block.getFieldValue("WIDTH"));
var height = Convert.ToDouble(block.getFieldValue("HEIGHT"));
var alt = FactoryUtils.escapeString(block.getFieldValue("ALT"));
fields.Push("new Blockly.FieldImage(" +
src + ", " + width + ", " + height + ", " + alt + ")");
break;
}
}
block = block.nextConnection == null ? null : block.nextConnection.targetBlock();
}
return(fields);
}
/// <summary>
/// Update the language code as JavaScript.
/// </summary>
/// <param name="blockType"> Name of block.</param>
/// <param name="rootBlock"> Factory_base block.</param>
/// <param name="workspace"></param> Where the root block lives.
/// <returns>Generated language code.</returns>
private static string formatJavaScript_(string blockType, Blockly.Block rootBlock, Blockly.Workspace workspace)
{
var code = new JsArray <string>();
code.Push("Blockly.Core.Blocks[\"" + blockType + "\"] = {");
code.Push(" init: () => {");
// Generate inputs.
var TYPES = new Dictionary <string, string>()
{
{ "input_value", "appendValueInput" },
{ "input_statement", "appendStatementInput" },
{ "input_dummy", "appendDummyInput" }
};
var contentsBlock = rootBlock.getInputTargetBlock("INPUTS");
while (contentsBlock != null)
{
if (!contentsBlock.disabled && !contentsBlock.getInheritedDisabled())
{
var name = "";
// Dummy inputs don't have names. Other inputs do.
if (contentsBlock.type != "input_dummy")
{
name =
FactoryUtils.escapeString(contentsBlock.getFieldValue("INPUTNAME"));
}
code.Push(" this." + TYPES[contentsBlock.type] + "(" + name + ")");
var check = FactoryUtils.getOptTypesFrom(contentsBlock, "TYPE");
if (!String.IsNullOrEmpty(check))
{
code.Push(" .setCheck(" + check + ")");
}
var align = contentsBlock.getFieldValue("ALIGN");
if (align != "LEFT")
{
code.Push(" .setAlign(Blockly.ALIGN_" + align + ")");
}
var fields = FactoryUtils.getFieldsJs_(
contentsBlock.getInputTargetBlock("FIELDS"));
for (var i = 0; i < fields.Length; i++)
{
code.Push(" .appendField(" + fields[i] + ")");
}
// Add semicolon to last line to finish the statement.
code[code.Length - 1] += ";";
}
contentsBlock = contentsBlock.nextConnection == null ? null :
contentsBlock.nextConnection.targetBlock();
}
// Generate inline/external switch.
if (rootBlock.getFieldValue("INLINE") == "EXT")
{
code.Push(" this.setInputsInline(false);");
}
else if (rootBlock.getFieldValue("INLINE") == "INT")
{
code.Push(" this.setInputsInline(true);");
}
// Generate output, or next/previous connections.
switch (rootBlock.getFieldValue("CONNECTIONS"))
{
case "LEFT":
code.Push(FactoryUtils.connectionLineJs_("setOutput", "OUTPUTTYPE", workspace));
break;
case "BOTH":
code.Push(
FactoryUtils.connectionLineJs_("setPreviousStatement", "TOPTYPE", workspace));
code.Push(
FactoryUtils.connectionLineJs_("setNextStatement", "BOTTOMTYPE", workspace));
break;
case "TOP":
code.Push(
FactoryUtils.connectionLineJs_("setPreviousStatement", "TOPTYPE", workspace));
break;
case "BOTTOM":
code.Push(
FactoryUtils.connectionLineJs_("setNextStatement", "BOTTOMTYPE", workspace));
break;
}
// Generate colour.
var colourBlock = rootBlock.getInputTargetBlock("COLOUR");
if (colourBlock != null && !colourBlock.disabled)
{
var hue = Script.ParseFloat(colourBlock.getFieldValue("HUE"));
if (!Double.IsNaN(hue))
{
code.Push(" this.setColour(" + hue + ");");
}
}
code.Push(" this.setTooltip(\"\");");
code.Push(" this.setHelpUrl(\"http://www.example.com/\");");
code.Push(" }");
code.Push("};");
return(code.Join("\n"));
}
/// <summary>
/// Update the language code as JSON.
/// </summary>
/// <param name="blockType"> Name of block.</param>
/// <param name="rootBlock">Factory_base block.</param>
/// <returns>Generanted language code.</returns>
private static string formatJson_(string blockType, Blockly.Block rootBlock)
{
var JS = new Dictionary <string, object>();
// Type is not used by Blockly, but may be used by a loader.
JS["type"] = blockType;
// Generate inputs.
var message = new JsArray <string>();
var args = new JsArray <object>();
var contentsBlock = rootBlock.getInputTargetBlock("INPUTS");
Blockly.Block lastInput = null;
while (contentsBlock != null)
{
if (!contentsBlock.disabled && !contentsBlock.getInheritedDisabled())
{
var fields = FactoryUtils.getFieldsJson_(
contentsBlock.getInputTargetBlock("FIELDS"));
for (var i = 0; i < fields.Length; i++)
{
if (fields[i] is string str)
{
message.Push(str.Replace(new Regex("%", RegexOptions.Multiline), "%%"));
}
else
{
args.Push(fields[i]);
message.Push("%" + args.Length);
}
}
var input = new Dictionary <string, object>();
input.Add("type", contentsBlock.type);
// Dummy inputs don't have names. Other inputs do.
if (contentsBlock.type != "input_dummy")
{
input["name"] = contentsBlock.getFieldValue("INPUTNAME");
}
var check = JSON.Parse(
FactoryUtils.getOptTypesFrom(contentsBlock, "TYPE") ?? "null");
if (check != null)
{
input["check"] = check;
}
var align = contentsBlock.getFieldValue("ALIGN");
if (align != "LEFT")
{
input["align"] = align;
}
args.Push(input);
message.Push("%" + args.Length);
lastInput = contentsBlock;
}
contentsBlock = contentsBlock.nextConnection == null ? null :
contentsBlock.nextConnection.targetBlock();
}
// Remove last input if dummy and not empty.
if (lastInput != null && lastInput.type == "input_dummy")
{
var fields = lastInput.getInputTargetBlock("FIELDS");
if (fields != null && FactoryUtils.getFieldsJson_(fields).Join("").Trim() != "")
{
var align = lastInput.getFieldValue("ALIGN");
if (align != "LEFT")
{
JS["lastDummyAlign0"] = align;
}
args.Pop();
message.Pop();
}
}
JS["message0"] = message.Join(" ");
if (args.Length > 0)
{
JS["args0"] = args;
}
// Generate inline/external switch.
if (rootBlock.getFieldValue("INLINE") == "EXT")
{
JS["inputsInline"] = false;
}
else if (rootBlock.getFieldValue("INLINE") == "INT")
{
JS["inputsInline"] = true;
}
// Generate output, or next/previous connections.
switch (rootBlock.getFieldValue("CONNECTIONS"))
{
case "LEFT":
JS["output"] =
JSON.Parse(
FactoryUtils.getOptTypesFrom(rootBlock, "OUTPUTTYPE") ?? "null");
break;
case "BOTH":
JS["previousStatement"] =
JSON.Parse(
FactoryUtils.getOptTypesFrom(rootBlock, "TOPTYPE") ?? "null");
JS["nextStatement"] =
JSON.Parse(
FactoryUtils.getOptTypesFrom(rootBlock, "BOTTOMTYPE") ?? "null");
break;
case "TOP":
JS["previousStatement"] =
JSON.Parse(
FactoryUtils.getOptTypesFrom(rootBlock, "TOPTYPE") ?? "null");
break;
case "BOTTOM":
JS["nextStatement"] =
JSON.Parse(
FactoryUtils.getOptTypesFrom(rootBlock, "BOTTOMTYPE") ?? "null");
break;
}
// Generate colour.
var colourBlock = rootBlock.getInputTargetBlock("COLOUR");
if (colourBlock != null && !colourBlock.disabled)
{
var hue = Script.ParseFloat(colourBlock.getFieldValue("HUE"));
JS["colour"] = hue;
}
JS["tooltip"] = "";
JS["helpUrl"] = "http://www.example.com/";
return(JSON.Stringify(JS, null, " "));
}
/// <summary>
/// Add event listeners for workspace factory.
/// </summary>
/// <param name="controller"> The controller for the workspace
/// factory tab.</param>
private static void addWorkspaceFactoryEventListeners_(WorkspaceFactoryController controller)
{
// Use up and down arrow keys to move categories.
Window.AddEventListener("keydown", new Action <Event>((e) => {
// Don't let arrow keys have any effect if not in Workspace Factory
// editing the toolbox.
if (!(controller.keyEventsEnabled && controller.selectedMode
== WorkspaceFactoryController.MODE_TOOLBOX))
{
return;
}
if (e.KeyCode == 38)
{
// Arrow up.
controller.moveElement(-1);
}
else if (e.KeyCode == 40)
{
// Arrow down.
controller.moveElement(1);
}
}));
// Determines if a block breaks shadow block placement rules.
// Breaks rules if (1) a shadow block no longer has a valid
// parent, or (2) a normal block is inside of a shadow block.
var isInvalidBlockPlacement = new Func <Blockly.Block, bool>((block) => {
return((controller.isUserGenShadowBlock(block.id) &&
block.getSurroundParent() == null) ||
(!controller.isUserGenShadowBlock(block.id) && block.getSurroundParent() != null &&
controller.isUserGenShadowBlock(block.getSurroundParent().id)));
});
// Add change listeners for toolbox workspace in workspace factory.
controller.toolboxWorkspace.addChangeListener((e) => {
// Listen for Blockly move and delete events to update preview.
// Not listening for Blockly create events because causes the user to drop
// blocks when dragging them into workspace. Could cause problems if ever
// load blocks into workspace directly without calling updatePreview.
if (e.type == Blockly.Events.MOVE || e.type == Blockly.Events.DELETE ||
e.type == Blockly.Events.CHANGE)
{
controller.saveStateFromWorkspace();
controller.updatePreview();
}
// Listen for Blockly UI events to correctly enable the "Edit Block" button.
// Only enable "Edit Block" when a block is selected and it has a
// surrounding parent, meaning it is nested in another block (blocks that
// are not nested in parents cannot be shadow blocks).
if (e.type == Blockly.Events.MOVE || (e.type == Blockly.Events.UI &&
((Blockly.Events.Ui)e).element == "selected"))
{
var selected = Blockly.Core.selected;
// Show shadow button if a block is selected. Show "Add Shadow" if
// a block is not a shadow block, show "Remove Shadow" if it is a
// shadow block.
if (selected != null)
{
var isShadow = controller.isUserGenShadowBlock(selected.id);
WorkspaceFactoryInit.displayAddShadow_(!isShadow);
WorkspaceFactoryInit.displayRemoveShadow_(isShadow);
}
else
{
WorkspaceFactoryInit.displayAddShadow_(false);
WorkspaceFactoryInit.displayRemoveShadow_(false);
}
if (selected != null && selected.getSurroundParent() != null &&
!controller.isUserGenShadowBlock(selected.getSurroundParent().id))
{
// Selected block is a valid shadow block or could be a valid shadow
// block.
// Enable block editing and remove warnings if the block is not a
// variable user-generated shadow block.
((HTMLButtonElement)Document.GetElementById("button_addShadow")).Disabled = false;
((HTMLButtonElement)Document.GetElementById("button_removeShadow")).Disabled = false;
if (!FactoryUtils.hasVariableField(selected) &&
controller.isDefinedBlock(selected))
{
selected.setWarningText(null);
}
}
else
{
// Selected block cannot be a valid shadow block.
if (selected != null && isInvalidBlockPlacement(selected))
{
// Selected block breaks shadow block rules.
// Invalid shadow block if (1) a shadow block no longer has a valid
// parent, or (2) a normal block is inside of a shadow block.
if (!controller.isUserGenShadowBlock(selected.id))
{
// Warn if a non-shadow block is nested inside a shadow block.
selected.setWarningText("Only shadow blocks can be nested inside\n"
+ "other shadow blocks.");
}
else if (!FactoryUtils.hasVariableField(selected))
{
// Warn if a shadow block is invalid only if not replacing
// warning for variables.
selected.setWarningText("Shadow blocks must be nested inside other"
+ " blocks.");
}
// Give editing options so that the user can make an invalid shadow
// block a normal block.
((HTMLButtonElement)Document.GetElementById("button_removeShadow")).Disabled = false;
((HTMLButtonElement)Document.GetElementById("button_addShadow")).Disabled = true;
}
else
{
// Selected block does not break any shadow block rules, but cannot
// be a shadow block.
// Remove possible "invalid shadow block placement" warning.
if (selected != null && controller.isDefinedBlock(selected) &&
(!FactoryUtils.hasVariableField(selected) ||
!controller.isUserGenShadowBlock(selected.id)))
{
selected.setWarningText(null);
}
// No block selected that is a shadow block or could be a valid shadow
// block. Disable block editing.
((HTMLButtonElement)Document.GetElementById("button_addShadow")).Disabled = true;
((HTMLButtonElement)Document.GetElementById("button_removeShadow")).Disabled = true;
}
}
}
// Convert actual shadow blocks added from the toolbox to user-generated
// shadow blocks.
if (e.type == Blockly.Events.CREATE)
{
controller.convertShadowBlocks();
// Let the user create a Variables or Functions category if they use
// blocks from either category.
// Get all children of a block and add them to childList.
Action <Blockly.Block, JsArray <Blockly.Block> > getAllChildren = null;
getAllChildren = new Action <Blockly.Block, JsArray <Blockly.Block> >((block, childList) => {
childList.Push(block);
var children = block.getChildren();
for (var i = 0; i < children.Length; i++)
{
var child = children[i];
getAllChildren(child, childList);
}
});
var newBaseBlock = controller.toolboxWorkspace.getBlockById(e.blockId);
var allNewBlocks = new JsArray <Blockly.Block>();
getAllChildren(newBaseBlock, allNewBlocks);
var variableCreated = false;
var procedureCreated = false;
// Check if the newly created block or any of its children are variable
// or procedure blocks.
for (var i = 0; i < allNewBlocks.Length; i++)
{
var block = allNewBlocks[i];
if (FactoryUtils.hasVariableField(block))
{
variableCreated = true;
}
else if (FactoryUtils.isProcedureBlock(block))
{
procedureCreated = true;
}
}
// If any of the newly created blocks are variable or procedure blocks,
// prompt the user to create the corresponding standard category.
if (variableCreated && !controller.hasVariablesCategory())
{
if (Window.Confirm("Your new block has a variables field. To use this block "
+ "fully, you will need a Variables category. Do you want to add "
+ "a Variables category to your custom toolbox?"))
{
controller.setMode(WorkspaceFactoryController.MODE_TOOLBOX);
controller.loadCategoryByName("variables");
}
}
if (procedureCreated && !controller.hasProceduresCategory())
{
if (Window.Confirm("Your new block is a function block. To use this block "
+ "fully, you will need a Functions category. Do you want to add "
+ "a Functions category to your custom toolbox?"))
{
controller.setMode(WorkspaceFactoryController.MODE_TOOLBOX);
controller.loadCategoryByName("functions");
}
}
}
});
}
