File "xml.js"
Full path: /usr/home/mndrn/domains/mndrn.ru/public_html/block-hill/blockly/core/xml.js
File size: 28.09 KiB (28762 bytes)
MIME-type: text/plain
Charset: utf-8
/**
* @license
* Copyright 2012 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @fileoverview XML reader and writer.
* @author [email protected] (Neil Fraser)
*/
'use strict';
/**
* @name Blockly.Xml
* @namespace
*/
goog.provide('Blockly.Xml');
goog.require('Blockly.constants');
goog.require('Blockly.Events');
goog.require('Blockly.Events.BlockCreate');
goog.require('Blockly.Events.FinishedLoading');
goog.require('Blockly.Events.VarCreate');
goog.require('Blockly.utils');
goog.require('Blockly.utils.dom');
goog.require('Blockly.utils.global');
goog.require('Blockly.utils.xml');
/**
* Encode a block tree as XML.
* @param {!Blockly.Workspace} workspace The workspace containing blocks.
* @param {boolean=} opt_noId True if the encoder should skip the block IDs.
* @return {!Element} XML DOM element.
*/
Blockly.Xml.workspaceToDom = function(workspace, opt_noId) {
var xml = Blockly.utils.xml.createElement('xml');
var variablesElement = Blockly.Xml.variablesToDom(
Blockly.Variables.allUsedVarModels(workspace));
if (variablesElement.hasChildNodes()) {
xml.appendChild(variablesElement);
}
var comments = workspace.getTopComments(true);
for (var i = 0, comment; (comment = comments[i]); i++) {
xml.appendChild(comment.toXmlWithXY(opt_noId));
}
var blocks = workspace.getTopBlocks(true);
for (var i = 0, block; (block = blocks[i]); i++) {
xml.appendChild(Blockly.Xml.blockToDomWithXY(block, opt_noId));
}
return xml;
};
/**
* Encode a list of variables as XML.
* @param {!Array.<!Blockly.VariableModel>} variableList List of all variable
* models.
* @return {!Element} Tree of XML elements.
*/
Blockly.Xml.variablesToDom = function(variableList) {
var variables = Blockly.utils.xml.createElement('variables');
for (var i = 0, variable; (variable = variableList[i]); i++) {
var element = Blockly.utils.xml.createElement('variable');
element.appendChild(Blockly.utils.xml.createTextNode(variable.name));
if (variable.type) {
element.setAttribute('type', variable.type);
}
element.id = variable.getId();
variables.appendChild(element);
}
return variables;
};
/**
* Encode a block subtree as XML with XY coordinates.
* @param {!Blockly.Block} block The root block to encode.
* @param {boolean=} opt_noId True if the encoder should skip the block ID.
* @return {!Element|!DocumentFragment} Tree of XML elements or an empty document
* fragment if the block was an insertion marker.
*/
Blockly.Xml.blockToDomWithXY = function(block, opt_noId) {
if (block.isInsertionMarker()) { // Skip over insertion markers.
block = block.getChildren(false)[0];
if (!block) {
// Disappears when appended.
return new DocumentFragment();
}
}
var width; // Not used in LTR.
if (block.workspace.RTL) {
width = block.workspace.getWidth();
}
var element = Blockly.Xml.blockToDom(block, opt_noId);
var xy = block.getRelativeToSurfaceXY();
element.setAttribute('x',
Math.round(block.workspace.RTL ? width - xy.x : xy.x));
element.setAttribute('y', Math.round(xy.y));
return element;
};
/**
* Encode a field as XML.
* @param {!Blockly.Field} field The field to encode.
* @return {Element} XML element, or null if the field did not need to be
* serialized.
* @private
*/
Blockly.Xml.fieldToDom_ = function(field) {
if (field.isSerializable()) {
var container = Blockly.utils.xml.createElement('field');
container.setAttribute('name', field.name || '');
return field.toXml(container);
}
return null;
};
/**
* Encode all of a block's fields as XML and attach them to the given tree of
* XML elements.
* @param {!Blockly.Block} block A block with fields to be encoded.
* @param {!Element} element The XML element to which the field DOM should be
* attached.
* @private
*/
Blockly.Xml.allFieldsToDom_ = function(block, element) {
for (var i = 0, input; (input = block.inputList[i]); i++) {
for (var j = 0, field; (field = input.fieldRow[j]); j++) {
var fieldDom = Blockly.Xml.fieldToDom_(field);
if (fieldDom) {
element.appendChild(fieldDom);
}
}
}
};
/**
* Encode a block subtree as XML.
* @param {!Blockly.Block} block The root block to encode.
* @param {boolean=} opt_noId True if the encoder should skip the block ID.
* @return {!Element|!DocumentFragment} Tree of XML elements or an empty document
* fragment if the block was an insertion marker.
*/
Blockly.Xml.blockToDom = function(block, opt_noId) {
// Skip over insertion markers.
if (block.isInsertionMarker()) {
var child = block.getChildren(false)[0];
if (child) {
return Blockly.Xml.blockToDom(child);
} else {
// Disappears when appended.
return new DocumentFragment();
}
}
var element =
Blockly.utils.xml.createElement(block.isShadow() ? 'shadow' : 'block');
element.setAttribute('type', block.type);
if (!opt_noId) {
// It's important to use setAttribute here otherwise IE11 won't serialize
// the block's id when domToText is called.
element.setAttribute('id', block.id);
}
if (block.mutationToDom) {
// Custom data for an advanced block.
var mutation = block.mutationToDom();
if (mutation && (mutation.hasChildNodes() || mutation.hasAttributes())) {
element.appendChild(mutation);
}
}
Blockly.Xml.allFieldsToDom_(block, element);
var commentText = block.getCommentText();
if (commentText) {
var size = block.commentModel.size;
var pinned = block.commentModel.pinned;
var commentElement = Blockly.utils.xml.createElement('comment');
commentElement.appendChild(Blockly.utils.xml.createTextNode(commentText));
commentElement.setAttribute('pinned', pinned);
commentElement.setAttribute('h', size.height);
commentElement.setAttribute('w', size.width);
element.appendChild(commentElement);
}
if (block.data) {
var dataElement = Blockly.utils.xml.createElement('data');
dataElement.appendChild(Blockly.utils.xml.createTextNode(block.data));
element.appendChild(dataElement);
}
for (var i = 0, input; (input = block.inputList[i]); i++) {
var container;
var empty = true;
if (input.type == Blockly.DUMMY_INPUT) {
continue;
} else {
var childBlock = input.connection.targetBlock();
if (input.type == Blockly.INPUT_VALUE) {
container = Blockly.utils.xml.createElement('value');
} else if (input.type == Blockly.NEXT_STATEMENT) {
container = Blockly.utils.xml.createElement('statement');
}
var shadow = input.connection.getShadowDom();
if (shadow && (!childBlock || !childBlock.isShadow())) {
container.appendChild(Blockly.Xml.cloneShadow_(shadow, opt_noId));
}
if (childBlock) {
var elem = Blockly.Xml.blockToDom(childBlock, opt_noId);
if (elem.nodeType == Blockly.utils.dom.NodeType.ELEMENT_NODE) {
container.appendChild(elem);
empty = false;
}
}
}
container.setAttribute('name', input.name);
if (!empty) {
element.appendChild(container);
}
}
if (block.inputsInline != undefined &&
block.inputsInline != block.inputsInlineDefault) {
element.setAttribute('inline', block.inputsInline);
}
if (block.isCollapsed()) {
element.setAttribute('collapsed', true);
}
if (!block.isEnabled()) {
element.setAttribute('disabled', true);
}
if (!block.isDeletable() && !block.isShadow()) {
element.setAttribute('deletable', false);
}
if (!block.isMovable() && !block.isShadow()) {
element.setAttribute('movable', false);
}
if (!block.isEditable()) {
element.setAttribute('editable', false);
}
var nextBlock = block.getNextBlock();
if (nextBlock) {
var elem = Blockly.Xml.blockToDom(nextBlock, opt_noId);
if (elem.nodeType == Blockly.utils.dom.NodeType.ELEMENT_NODE) {
var container = Blockly.utils.xml.createElement('next');
container.appendChild(elem);
element.appendChild(container);
}
}
var shadow = block.nextConnection && block.nextConnection.getShadowDom();
if (shadow && (!nextBlock || !nextBlock.isShadow())) {
container.appendChild(Blockly.Xml.cloneShadow_(shadow, opt_noId));
}
return element;
};
/**
* Deeply clone the shadow's DOM so that changes don't back-wash to the block.
* @param {!Element} shadow A tree of XML elements.
* @param {boolean=} opt_noId True if the encoder should skip the block ID.
* @return {!Element} A tree of XML elements.
* @private
*/
Blockly.Xml.cloneShadow_ = function(shadow, opt_noId) {
shadow = shadow.cloneNode(true);
// Walk the tree looking for whitespace. Don't prune whitespace in a tag.
var node = shadow;
var textNode;
while (node) {
if (opt_noId && node.nodeName == 'shadow') {
// Strip off IDs from shadow blocks. There should never be a 'block' as
// a child of a 'shadow', so no need to check that.
node.removeAttribute('id');
}
if (node.firstChild) {
node = node.firstChild;
} else {
while (node && !node.nextSibling) {
textNode = node;
node = node.parentNode;
if (textNode.nodeType == Blockly.utils.dom.NodeType.TEXT_NODE &&
textNode.data.trim() == '' && node.firstChild != textNode) {
// Prune whitespace after a tag.
Blockly.utils.dom.removeNode(textNode);
}
}
if (node) {
textNode = node;
node = node.nextSibling;
if (textNode.nodeType == Blockly.utils.dom.NodeType.TEXT_NODE &&
textNode.data.trim() == '') {
// Prune whitespace before a tag.
Blockly.utils.dom.removeNode(textNode);
}
}
}
}
return shadow;
};
/**
* Converts a DOM structure into plain text.
* Currently the text format is fairly ugly: all one line with no whitespace,
* unless the DOM itself has whitespace built-in.
* @param {!Node} dom A tree of XML nodes.
* @return {string} Text representation.
*/
Blockly.Xml.domToText = function(dom) {
var text = Blockly.utils.xml.domToText(dom);
// Unpack self-closing tags. These tags fail when embedded in HTML.
// <block name="foo"/> -> <block name="foo"></block>
return text.replace(/<(\w+)([^<]*)\/>/g, '<$1$2></$1>');
};
/**
* Converts a DOM structure into properly indented text.
* @param {!Node} dom A tree of XML elements.
* @return {string} Text representation.
*/
Blockly.Xml.domToPrettyText = function(dom) {
// This function is not guaranteed to be correct for all XML.
// But it handles the XML that Blockly generates.
var blob = Blockly.Xml.domToText(dom);
// Place every open and close tag on its own line.
var lines = blob.split('<');
// Indent every line.
var indent = '';
for (var i = 1; i < lines.length; i++) {
var line = lines[i];
if (line[0] == '/') {
indent = indent.substring(2);
}
lines[i] = indent + '<' + line;
if (line[0] != '/' && line.slice(-2) != '/>') {
indent += ' ';
}
}
// Pull simple tags back together.
// E.g. <foo></foo>
var text = lines.join('\n');
text = text.replace(/(<(\w+)\b[^>]*>[^\n]*)\n *<\/\2>/g, '$1</$2>');
// Trim leading blank line.
return text.replace(/^\n/, '');
};
/**
* Converts an XML string into a DOM structure.
* @param {string} text An XML string.
* @return {!Element} A DOM object representing the singular child of the
* document element.
* @throws if the text doesn't parse.
*/
Blockly.Xml.textToDom = function(text) {
var doc = Blockly.utils.xml.textToDomDocument(text);
if (!doc || !doc.documentElement ||
doc.getElementsByTagName('parsererror').length) {
throw Error('textToDom was unable to parse: ' + text);
}
return doc.documentElement;
};
/**
* Clear the given workspace then decode an XML DOM and
* create blocks on the workspace.
* @param {!Element} xml XML DOM.
* @param {!Blockly.Workspace} workspace The workspace.
* @return {Array.<string>} An array containing new block ids.
*/
Blockly.Xml.clearWorkspaceAndLoadFromXml = function(xml, workspace) {
workspace.setResizesEnabled(false);
workspace.clear();
var blockIds = Blockly.Xml.domToWorkspace(xml, workspace);
workspace.setResizesEnabled(true);
return blockIds;
};
/**
* Decode an XML DOM and create blocks on the workspace.
* @param {!Element} xml XML DOM.
* @param {!Blockly.Workspace} workspace The workspace.
* @return {!Array.<string>} An array containing new block IDs.
* @suppress {strictModuleDepCheck} Suppress module check while workspace
* comments are not bundled in.
*/
Blockly.Xml.domToWorkspace = function(xml, workspace) {
if (xml instanceof Blockly.Workspace) {
var swap = xml;
// Closure Compiler complains here because the arguments are reversed.
/** @suppress {checkTypes} */
xml = workspace;
workspace = swap;
console.warn('Deprecated call to Blockly.Xml.domToWorkspace, ' +
'swap the arguments.');
}
var width; // Not used in LTR.
if (workspace.RTL) {
width = workspace.getWidth();
}
var newBlockIds = []; // A list of block IDs added by this call.
Blockly.utils.dom.startTextWidthCache();
var existingGroup = Blockly.Events.getGroup();
if (!existingGroup) {
Blockly.Events.setGroup(true);
}
// Disable workspace resizes as an optimization.
if (workspace.setResizesEnabled) {
workspace.setResizesEnabled(false);
}
var variablesFirst = true;
try {
for (var i = 0, xmlChild; (xmlChild = xml.childNodes[i]); i++) {
var name = xmlChild.nodeName.toLowerCase();
var xmlChildElement = /** @type {!Element} */ (xmlChild);
if (name == 'block' ||
(name == 'shadow' && !Blockly.Events.recordUndo)) {
// Allow top-level shadow blocks if recordUndo is disabled since
// that means an undo is in progress. Such a block is expected
// to be moved to a nested destination in the next operation.
var block = Blockly.Xml.domToBlock(xmlChildElement, workspace);
newBlockIds.push(block.id);
var blockX = xmlChildElement.hasAttribute('x') ?
parseInt(xmlChildElement.getAttribute('x'), 10) : 10;
var blockY = xmlChildElement.hasAttribute('y') ?
parseInt(xmlChildElement.getAttribute('y'), 10) : 10;
if (!isNaN(blockX) && !isNaN(blockY)) {
block.moveBy(workspace.RTL ? width - blockX : blockX, blockY);
}
variablesFirst = false;
} else if (name == 'shadow') {
throw TypeError('Shadow block cannot be a top-level block.');
} else if (name == 'comment') {
if (workspace.rendered) {
if (!Blockly.WorkspaceCommentSvg) {
console.warn('Missing require for Blockly.WorkspaceCommentSvg, ' +
'ignoring workspace comment.');
} else {
Blockly.WorkspaceCommentSvg.fromXml(
xmlChildElement, workspace, width);
}
} else {
if (!Blockly.WorkspaceComment) {
console.warn('Missing require for Blockly.WorkspaceComment, ' +
'ignoring workspace comment.');
} else {
Blockly.WorkspaceComment.fromXml(xmlChildElement, workspace);
}
}
} else if (name == 'variables') {
if (variablesFirst) {
Blockly.Xml.domToVariables(xmlChildElement, workspace);
} else {
throw Error('\'variables\' tag must exist once before block and ' +
'shadow tag elements in the workspace XML, but it was found in ' +
'another location.');
}
variablesFirst = false;
}
}
} finally {
if (!existingGroup) {
Blockly.Events.setGroup(false);
}
Blockly.utils.dom.stopTextWidthCache();
}
// Re-enable workspace resizing.
if (workspace.setResizesEnabled) {
workspace.setResizesEnabled(true);
}
Blockly.Events.fire(new Blockly.Events.FinishedLoading(workspace));
return newBlockIds;
};
/**
* Decode an XML DOM and create blocks on the workspace. Position the new
* blocks immediately below prior blocks, aligned by their starting edge.
* @param {!Element} xml The XML DOM.
* @param {!Blockly.Workspace} workspace The workspace to add to.
* @return {Array.<string>} An array containing new block IDs.
*/
Blockly.Xml.appendDomToWorkspace = function(xml, workspace) {
var bbox; // Bounding box of the current blocks.
// First check if we have a workspaceSvg, otherwise the blocks have no shape
// and the position does not matter.
if (Object.prototype.hasOwnProperty.call(workspace, 'scale')) {
bbox = workspace.getBlocksBoundingBox();
}
// Load the new blocks into the workspace and get the IDs of the new blocks.
var newBlockIds = Blockly.Xml.domToWorkspace(xml, workspace);
if (bbox && bbox.top != bbox.bottom) { // check if any previous block
var offsetY = 0; // offset to add to y of the new block
var offsetX = 0;
var farY = bbox.bottom; // bottom position
var topX = workspace.RTL ? bbox.right : bbox.left; // x of bounding box
// Check position of the new blocks.
var newLeftX = Infinity; // x of top left corner
var newRightX = -Infinity; // x of top right corner
var newY = Infinity; // y of top corner
var ySeparation = 10;
for (var i = 0; i < newBlockIds.length; i++) {
var blockXY =
workspace.getBlockById(newBlockIds[i]).getRelativeToSurfaceXY();
if (blockXY.y < newY) {
newY = blockXY.y;
}
if (blockXY.x < newLeftX) { // if we left align also on x
newLeftX = blockXY.x;
}
if (blockXY.x > newRightX) { // if we right align also on x
newRightX = blockXY.x;
}
}
offsetY = farY - newY + ySeparation;
offsetX = workspace.RTL ? topX - newRightX : topX - newLeftX;
for (var i = 0; i < newBlockIds.length; i++) {
var block = workspace.getBlockById(newBlockIds[i]);
block.moveBy(offsetX, offsetY);
}
}
return newBlockIds;
};
/**
* Decode an XML block tag and create a block (and possibly sub blocks) on the
* workspace.
* @param {!Element} xmlBlock XML block element.
* @param {!Blockly.Workspace} workspace The workspace.
* @return {!Blockly.Block} The root block created.
*/
Blockly.Xml.domToBlock = function(xmlBlock, workspace) {
if (xmlBlock instanceof Blockly.Workspace) {
var swap = xmlBlock;
// Closure Compiler complains here because the arguments are reversed.
/** @suppress {checkTypes} */
xmlBlock = /** @type {!Element} */ (workspace);
workspace = swap;
console.warn('Deprecated call to Blockly.Xml.domToBlock, ' +
'swap the arguments.');
}
// Create top-level block.
Blockly.Events.disable();
var variablesBeforeCreation = workspace.getAllVariables();
try {
var topBlock = Blockly.Xml.domToBlockHeadless_(xmlBlock, workspace);
// Generate list of all blocks.
var blocks = topBlock.getDescendants(false);
if (workspace.rendered) {
// Wait to track connections to speed up assembly.
topBlock.setConnectionTracking(false);
// Render each block.
for (var i = blocks.length - 1; i >= 0; i--) {
blocks[i].initSvg();
}
for (var i = blocks.length - 1; i >= 0; i--) {
blocks[i].render(false);
}
// Populating the connection database may be deferred until after the
// blocks have rendered.
setTimeout(function() {
if (!topBlock.disposed) {
topBlock.setConnectionTracking(true);
}
}, 1);
topBlock.updateDisabled();
// Allow the scrollbars to resize and move based on the new contents.
// TODO(@picklesrus): #387. Remove when domToBlock avoids resizing.
workspace.resizeContents();
} else {
for (var i = blocks.length - 1; i >= 0; i--) {
blocks[i].initModel();
}
}
} finally {
Blockly.Events.enable();
}
if (Blockly.Events.isEnabled()) {
var newVariables = Blockly.Variables.getAddedVariables(workspace,
variablesBeforeCreation);
// Fire a VarCreate event for each (if any) new variable created.
for (var i = 0; i < newVariables.length; i++) {
var thisVariable = newVariables[i];
Blockly.Events.fire(new Blockly.Events.VarCreate(thisVariable));
}
// Block events come after var events, in case they refer to newly created
// variables.
Blockly.Events.fire(new Blockly.Events.BlockCreate(topBlock));
}
return topBlock;
};
/**
* Decode an XML list of variables and add the variables to the workspace.
* @param {!Element} xmlVariables List of XML variable elements.
* @param {!Blockly.Workspace} workspace The workspace to which the variable
* should be added.
*/
Blockly.Xml.domToVariables = function(xmlVariables, workspace) {
for (var i = 0, xmlChild; (xmlChild = xmlVariables.childNodes[i]); i++) {
if (xmlChild.nodeType != Blockly.utils.dom.NodeType.ELEMENT_NODE) {
continue; // Skip text nodes.
}
var type = xmlChild.getAttribute('type');
var id = xmlChild.getAttribute('id');
var name = xmlChild.textContent;
workspace.createVariable(name, type, id);
}
};
/**
* Decode an XML block tag and create a block (and possibly sub blocks) on the
* workspace.
* @param {!Element} xmlBlock XML block element.
* @param {!Blockly.Workspace} workspace The workspace.
* @return {!Blockly.Block} The root block created.
* @private
*/
Blockly.Xml.domToBlockHeadless_ = function(xmlBlock, workspace) {
var block = null;
var prototypeName = xmlBlock.getAttribute('type');
if (!prototypeName) {
throw TypeError('Block type unspecified: ' + xmlBlock.outerHTML);
}
var id = xmlBlock.getAttribute('id');
block = workspace.newBlock(prototypeName, id);
var blockChild = null;
for (var i = 0, xmlChild; (xmlChild = xmlBlock.childNodes[i]); i++) {
if (xmlChild.nodeType == Blockly.utils.dom.NodeType.TEXT_NODE) {
// Ignore any text at the <block> level. It's all whitespace anyway.
continue;
}
var input;
// Find any enclosed blocks or shadows in this tag.
var childBlockElement = null;
var childShadowElement = null;
for (var j = 0, grandchild; (grandchild = xmlChild.childNodes[j]); j++) {
if (grandchild.nodeType == Blockly.utils.dom.NodeType.ELEMENT_NODE) {
if (grandchild.nodeName.toLowerCase() == 'block') {
childBlockElement = /** @type {!Element} */ (grandchild);
} else if (grandchild.nodeName.toLowerCase() == 'shadow') {
childShadowElement = /** @type {!Element} */ (grandchild);
}
}
}
var callInitSvg = false;
var name = xmlChild.getAttribute('name');
var xmlChildElement = /** @type {!Element} */ (xmlChild);
switch (xmlChild.nodeName.toLowerCase()) {
case 'mutation':
// Custom data for an advanced block.
if (block.domToMutation) {
block.domToMutation(xmlChildElement);
if (block.initSvg) {
// Mutation may have added some elements that need initializing.
callInitSvg = true;
}
}
break;
case 'comment':
if (!Blockly.Comment) {
console.warn('Missing require for Blockly.Comment, ' +
'ignoring block comment.');
break;
}
var text = xmlChildElement.textContent;
var pinned = xmlChildElement.getAttribute('pinned') == 'true';
var width = parseInt(xmlChildElement.getAttribute('w'), 10);
var height = parseInt(xmlChildElement.getAttribute('h'), 10);
block.setCommentText(text);
block.commentModel.pinned = pinned;
if (!isNaN(width) && !isNaN(height)) {
block.commentModel.size = new Blockly.utils.Size(width, height);
}
if (pinned && block.getCommentIcon && !block.isInFlyout) {
setTimeout(function() {
block.getCommentIcon().setVisible(true);
}, 1);
}
break;
case 'data':
block.data = xmlChild.textContent;
break;
case 'title':
// Titles were renamed to field in December 2013.
// Fall through.
case 'field':
Blockly.Xml.domToField_(block, name, xmlChildElement);
break;
case 'value':
case 'statement':
input = block.getInput(name);
if (!input) {
console.warn('Ignoring non-existent input ' + name + ' in block ' +
prototypeName);
break;
}
if (childBlockElement) {
blockChild = Blockly.Xml.domToBlockHeadless_(childBlockElement,
workspace);
if (blockChild.outputConnection) {
input.connection.connect(blockChild.outputConnection);
} else if (blockChild.previousConnection) {
input.connection.connect(blockChild.previousConnection);
} else {
throw TypeError(
'Child block does not have output or previous statement.');
}
}
// Set shadow after so we don't create a shadow we delete immediately.
if (childShadowElement) {
input.connection.setShadowDom(childShadowElement);
}
break;
case 'next':
if (childBlockElement) {
if (!block.nextConnection) {
throw TypeError('Next statement does not exist.');
}
// If there is more than one XML 'next' tag.
if (block.nextConnection.isConnected()) {
throw TypeError('Next statement is already connected.');
}
blockChild = Blockly.Xml.domToBlockHeadless_(childBlockElement,
workspace);
if (!blockChild.previousConnection) {
throw TypeError('Next block does not have previous statement.');
}
block.nextConnection.connect(blockChild.previousConnection);
}
// Set shadow after so we don't create a shadow we delete immediately.
if (childShadowElement && block.nextConnection) {
block.nextConnection.setShadowDom(childShadowElement);
}
break;
default:
// Unknown tag; ignore. Same principle as HTML parsers.
console.warn('Ignoring unknown tag: ' + xmlChild.nodeName);
}
}
if (callInitSvg) {
// InitSvg needs to be called after variable fields are loaded.
block.initSvg();
}
var inline = xmlBlock.getAttribute('inline');
if (inline) {
block.setInputsInline(inline == 'true');
}
var disabled = xmlBlock.getAttribute('disabled');
if (disabled) {
block.setEnabled(disabled != 'true' && disabled != 'disabled');
}
var deletable = xmlBlock.getAttribute('deletable');
if (deletable) {
block.setDeletable(deletable == 'true');
}
var movable = xmlBlock.getAttribute('movable');
if (movable) {
block.setMovable(movable == 'true');
}
var editable = xmlBlock.getAttribute('editable');
if (editable) {
block.setEditable(editable == 'true');
}
var collapsed = xmlBlock.getAttribute('collapsed');
if (collapsed) {
block.setCollapsed(collapsed == 'true');
}
if (xmlBlock.nodeName.toLowerCase() == 'shadow') {
// Ensure all children are also shadows.
var children = block.getChildren(false);
for (var i = 0, child; (child = children[i]); i++) {
if (!child.isShadow()) {
throw TypeError('Shadow block not allowed non-shadow child.');
}
}
// Ensure this block doesn't have any variable inputs.
if (block.getVarModels().length) {
throw TypeError('Shadow blocks cannot have variable references.');
}
block.setShadow(true);
}
return block;
};
/**
* Decode an XML field tag and set the value of that field on the given block.
* @param {!Blockly.Block} block The block that is currently being deserialized.
* @param {string} fieldName The name of the field on the block.
* @param {!Element} xml The field tag to decode.
* @private
*/
Blockly.Xml.domToField_ = function(block, fieldName, xml) {
var field = block.getField(fieldName);
if (!field) {
console.warn('Ignoring non-existent field ' + fieldName + ' in block ' +
block.type);
return;
}
field.fromXml(xml);
};
/**
* Remove any 'next' block (statements in a stack).
* @param {!Element|!DocumentFragment} xmlBlock XML block element or an empty
* DocumentFragment if the block was an insertion marker.
*/
Blockly.Xml.deleteNext = function(xmlBlock) {
for (var i = 0, child; (child = xmlBlock.childNodes[i]); i++) {
if (child.nodeName.toLowerCase() == 'next') {
xmlBlock.removeChild(child);
break;
}
}
};