ptp/highlightTest.html at master · joancc/ptp · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Blockly Demo: JS Interpreter</title>
    <script src="/libraries/acorn_interpreter.js"></script>
    <script src="/libraries/blockly_compressed.js"></script>
    <script src="/libraries/blocks_compressed.js"></script>
    <script src="/libraries/javascript_compressed.js"></script>
    <!--<script src="../../msg/js/en.js"></script>-->
    <style>
        body {
            background-color: #fff;
            font-family: sans-serif;
        }
        h1 {
            font-weight: normal;
            font-size: 140%;
        }
    </style>
</head>
<body>
<p>
    <button onclick="parseCode()">Parse JavaScript</button>
    <button onclick="stepCode()" id="stepButton" disabled="disabled">Step JavaScript</button>
</p>

<div id="blocklyDiv" style="height: 480px; width: 600px;"></div>

<xml id="toolbox" style="display: none">
    <category name="Logic">
        <block type="controls_if"></block>
        <block type="logic_compare"></block>
        <block type="logic_operation"></block>
        <block type="logic_negate"></block>
        <block type="logic_boolean"></block>
    </category>
    <category name="Loops">
        <block type="controls_repeat_ext">
            <value name="TIMES">
                <block type="math_number">
                    <field name="NUM">10</field>
                </block>
            </value>
        </block>
        <block type="controls_whileUntil"></block>
    </category>
    <category name="Math">
        <block type="math_number"></block>
        <block type="math_arithmetic"></block>
        <block type="math_single"></block>
    </category>
    <category name="Text">
        <block type="text"></block>
        <block type="text_length"></block>
        <block type="text_print"></block>
        <block type="text_prompt_ext">
            <value name="TEXT">
                <block type="text"></block>
            </value>
        </block>
    </category>
    <category name="Variables" custom="VARIABLE"></category>
    <category name="Functions" custom="PROCEDURE"></category>
</xml>

<xml id="startBlocks" style="display: none">
    <block type="variables_set" inline="true" x="20" y="20">
        <field name="VAR">n</field>
        <value name="VALUE">
            <block type="math_number">
                <field name="NUM">1</field>
            </block>
        </value>
        <next>
            <block type="controls_repeat_ext" inline="true">
                <value name="TIMES">
                    <block type="math_number">
                        <field name="NUM">4</field>
                    </block>
                </value>
                <statement name="DO">
                    <block type="variables_set" inline="true">
                        <field name="VAR">n</field>
                        <value name="VALUE">
                            <block type="math_arithmetic" inline="true">
                                <field name="OP">MULTIPLY</field>
                                <value name="A">
                                    <block type="variables_get">
                                        <field name="VAR">n</field>
                                    </block>
                                </value>
                                <value name="B">
                                    <block type="math_number">
                                        <field name="NUM">2</field>
                                    </block>
                                </value>
                            </block>
                        </value>
                    </block>
                </statement>
                <next>
                    <block type="text_print" inline="false">
                        <value name="TEXT">
                            <block type="variables_get">
                                <field name="VAR">n</field>
                            </block>
                        </value>
                    </block>
                </next>
            </block>
        </next>
    </block>
</xml>

<script>
    Blockly.inject(document.getElementById('blocklyDiv'),
            {toolbox: document.getElementById('toolbox')});
    Blockly.Xml.domToWorkspace(Blockly.mainWorkspace,
            document.getElementById('startBlocks'));

    var myInterpreter = null;

    function initApi(interpreter, scope) {
        // Add an API function for the alert() block.
        var wrapper = function(text) {
            text = text ? text.toString() : '';
            return interpreter.createPrimitive(alert(text));
        };
        interpreter.setProperty(scope, 'alert',
                interpreter.createNativeFunction(wrapper));

        // Add an API function for the prompt() block.
        var wrapper = function(text) {
            text = text ? text.toString() : '';
            return interpreter.createPrimitive(prompt(text));
        };
        interpreter.setProperty(scope, 'prompt',
                interpreter.createNativeFunction(wrapper));

        // Add an API function for highlighting blocks.
        var wrapper = function(id) {
            id = id ? id.toString() : '';
            return interpreter.createPrimitive(highlightBlock(id));
        };
        interpreter.setProperty(scope, 'highlightBlock',
                interpreter.createNativeFunction(wrapper));
    }

    var highlightPause = false;

    function highlightBlock(id) {
        Blockly.mainWorkspace.highlightBlock(id);
        highlightPause = true;
    }

    function parseCode() {
        // Generate JavaScript code and parse it.
        Blockly.JavaScript.STATEMENT_PREFIX = 'highlightBlock(%1);\n';
        Blockly.JavaScript.addReservedWords('highlightBlock');
        var code = Blockly.JavaScript.workspaceToCode();
        myInterpreter = new Interpreter(code, initApi);

        alert('Ready to execute this code:\n\n' + code);
        document.getElementById('stepButton').disabled = '';
        highlightPause = false;
        Blockly.mainWorkspace.traceOn(true);
        Blockly.mainWorkspace.highlightBlock(null);
    }

    function stepCode() {
        try {
            var ok = myInterpreter.step();
        } finally {
            if (!ok) {
                // Program complete, no more code to execute.
                document.getElementById('stepButton').disabled = 'disabled';
                return;
            }
        }
        if (highlightPause) {
            // A block has been highlighted.  Pause execution here.
            highlightPause = false;
        } else {
            // Keep executing until a highlight statement is reached.
            stepCode();
        }
    }
</script>

</body>
</html>