static/gcc.js

// Copyright (c) 2012, Matt Godbolt
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are met:
// 
//     * Redistributions of source code must retain the above copyright notice, 
//       this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright 
//       notice, this list of conditions and the following disclaimer in the 
//       documentation and/or other materials provided with the distribution.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
// POSSIBILITY OF SUCH DAMAGE.

var currentCompiler = null;
var allCompilers = [];

function getSource() {
    var source = $('.source').val();
    if (source == "browser") {
        if (window.localStorage['files'] == undefined) window.localStorage['files'] = "{}";
        return {
            list: function(callback) {
                var files = JSON.parse(window.localStorage['files']);
                callback($.map(files, function(val, key) { return val; }));
            },
            load: function(name, callback) {
                var files = JSON.parse(window.localStorage['files']);
                callback(files[name]);
            },
            save: function(obj, callback) {
                var files = JSON.parse(window.localStorage['files']);
                files[obj.name] = obj;
                window.localStorage['files'] = JSON.stringify(files);
                callback(true);
            }
        };
    } else {
        var base = "/source/" + source;
        return {
            list: function(callback) { $.getJSON(base + "/list", callback); },
            load: function(name, callback) { $.getJSON(base + "/load/" + name, callback); },
            save: function(obj, callback) { alert("Coming soon..."); }
        };
    }
}

var currentFileList = {};
function updateFileList() {
    getSource().list(function(results) {
        currentFileList = {};
        $('.filename option').remove();
        $.each(results, function(index, arg) {
            currentFileList[arg.name] = arg;
            $('.filename').append($('<option value="' + arg.urlpart + '">' + arg.name + '</option>'));
            if (window.localStorage['filename'] == arg.urlpart) $('.filename').val(arg.urlpart);
        });
    });
}

function onSourceChange() {
    updateFileList();
    window.localStorage['source'] = $('.source').val();
}

function loadFile() {
    var name = $('.filename').val();
    window.localStorage['filename'] = name;
    getSource().load(name, function(results) {
        if (results.file) {
            currentCompiler.setSource(results.file);
        } else {
            // TODO: error?
            console.log(results);
        }
    });
}

function saveFile() {
    saveAs($('.files .filename').val());
}

function saveAs(filename) {
    var prevFilename = window.localStorage['filename'] || "";
    if (filename != prevFilename && currentFileList[filename]) {
        // TODO!
        alert("Coming soon - overwriting files");
        return;
    }
    var obj = { urlpart: filename, name: filename, file: currentCompiler.getSource() };
    getSource().save(obj, function(ok) {
        if (ok) {
            window.localStorage['filename'] = filename;
            updateFileList();
        }
    });
}

function saveFileAs() {
    $('#saveDialog').modal();
    $('#saveDialog .save-filename').val($('.files .filename').val());
    $('#saveDialog .save-filename').focus();
    function onSave() {
        $('#saveDialog').modal('hide');
        saveAs($('#saveDialog .save-filename').val());
    };
    $('#saveDialog .save').click(onSave);
    $('#saveDialog .save-filename').keyup(function(event) {
        if (event.keyCode == 13) onSave();
    });
}

function serialiseState() {
    var state = {
        version: 3,
        filterAsm: getAsmFilters(),
        compilers: $.map(allCompilers, function(compiler) { return compiler.serialiseState(); })
    };
    return encodeURIComponent(JSON.stringify(state));
}

function deserialiseState(state) {
    try {
        state = $.parseJSON(decodeURIComponent(state));
        switch (state.version) {
        case 1:
            state.filterAsm = {};
            // falls into
        case 2:
            state.compilers = [state];
            // falls into
        case 3:
            break;
        default:
            return false;
        }
    } catch (ignored) { return false; }
    setFilterUi(state.filterAsm);
    for (var i = 0; i < Math.min(allCompilers.length, state.compilers.length); i++) {
        allCompilers[i].deserialiseState(state.compilers[i]);
    }
    return true;
}

function initialise() {
    var defaultFilters = JSON.stringify(getAsmFilters());
    var actualFilters = $.parseJSON(window.localStorage['filter'] || defaultFilters);
    setFilterUi(actualFilters);

    var compiler = new Compiler($('body'), actualFilters, "a", function() {
        $('a.permalink').attr('href', '#' + serialiseState());
    });
    allCompilers.push(compiler);
    currentCompiler = compiler;

    $('form').submit(function() { return false; });
    $('.files .source').change(onSourceChange);
    $.getJSON("/compilers", function(results) {
        compilersByExe = {};
        $.each(results, function(index, arg) {
            compilersByExe[arg.exe] = arg;
        });
        compiler.setCompilers(results);
    });
    $.getJSON("/sources", function(results) {
        $('.source option').remove();
        $.each(results, function(index, arg) {
            $('.files .source').append($('<option value="' + arg.urlpart + '">' + arg.name + '</option>'));
            if (window.localStorage['source'] == arg.urlpart) {
                $('.files .source').val(arg.urlpart);
            }
        });
        onSourceChange();
    });
    $('.files .load').click(function() {
        loadFile();
        return false;
    });
    $('.files .save').click(function() {
        saveFile();
        return false;
    });
    $('.files .saveas').click(function() {
        saveFileAs();
        return false;
    });
    
    $('.filter button.btn').click(function(e) {
        $(e.target).toggleClass('active');
        var filters = getAsmFilters();
        window.localStorage['filter'] = JSON.stringify(filters);
        currentCompiler.setFilters(filters);
    });

    function loadFromHash() {
        deserialiseState(window.location.hash.substr(1));
    }

    $(window).bind('hashchange', function() {
        loadFromHash();
    });
    loadFromHash();
}

function getAsmFilters() {
    var asmFilters = {};
    $('.filter button.btn.active').each(function() {
        asmFilters[$(this).val()] = true;
    });
    return asmFilters;
}

function setFilterUi(asmFilters) {
    $('.filter button.btn').each(function() {
        $(this).toggleClass('active', !!asmFilters[$(this).val()]);
    });
}

$(initialise);