2022-05-18 20:14:24 +03:00
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<!doctype html>
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<html lang="en-us">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>sqlite3 fiddle</title>
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<style>
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.emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
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2022-05-18 20:40:19 +03:00
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textarea {
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font-family: monospace;
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flex: 1 1 auto;
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}
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div.emscripten { text-align: center; }
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div.emscripten_border { border: 1px solid black; }
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.spinner {
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height: 50px;
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width: 50px;
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margin: 0px auto;
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animation: rotation 0.8s linear infinite;
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border-left: 10px solid rgb(0,150,240);
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border-right: 10px solid rgb(0,150,240);
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border-bottom: 10px solid rgb(0,150,240);
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border-top: 10px solid rgb(100,0,200);
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border-radius: 100%;
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background-color: rgb(200,100,250);
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}
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@keyframes rotation {
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from {transform: rotate(0deg);}
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to {transform: rotate(360deg);}
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}
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header {
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font-size: 130%;
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font-weight: bold;
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}
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#main-wrapper {
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display: flex;
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flex-direction: column;
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}
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#main-wrapper.side-by-side {
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flex-direction: row;
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}
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.ta-wrapper{
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display: flex;
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flex-direction: column;
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align-items: stretch;
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flex: 1 1 auto;
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margin: 0.25em;
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}
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.button-bar {
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display: flex;
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justify-content: center;
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}
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.button-bar button {
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margin: 0.25em 1em;
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}
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label[for] {
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cursor: pointer;
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}
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fieldset {
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border-radius: 0.5em;
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}
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.error {
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color: red;
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background-color: yellow;
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}
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.hidden {
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position: absolute !important;
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opacity: 0 !important;
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pointer-events: none !important;
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display: none !important;
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}
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fieldset.options {
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font-size: 80%;
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}
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fieldset > legend {
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padding: 0 0.5em;
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}
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span.labeled-input {
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padding: 0.25em;
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margin: 0.25em 0.5em;
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border: 1px inset;
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border-radius: 0.25em;
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white-space: nowrap;
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}
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#notes-caveats {
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border-top: 1px dotted;
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padding-top: 0.25em;
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margin-top: 0.5em;
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}
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</style>
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</head>
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<body>
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<header>sqlite3 fiddle</header>
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<figure style="overflow:visible;" id="spinner"><div class="spinner"></div><center style="margin-top:0.5em"><strong>emscripten</strong></center></figure>
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<div class="emscripten" id="status">Downloading...</div>
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<div class="emscripten">
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<progress value="0" max="100" id="progress" hidden='1'></progress>
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</div>
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<fieldset class='options'>
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<legend>Options</legend>
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<div class=''>
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<span class='labeled-input'>
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<input type='checkbox' id='opt-cb-sbs'>
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<label for='opt-cb-sbs'>Side-by-side</label>
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</span>
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<span class='labeled-input'>
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<input type='checkbox' id='opt-cb-autoscroll' checked>
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<label for='opt-cb-autoscroll'>Auto-scroll output</label>
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</span>
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</div>
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</fieldset>
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<div id='main-wrapper'>
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<div class='ta-wrapper'>
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<textarea id="input" rows="8"
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placeholder="Shell input. Ctrl-enter/shift-enter runs it.">
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-- Use ctrl-enter or shift-enter to execute SQL
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.nullvalue NULL
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.mode box
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CREATE TABLE t(a,b);
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INSERT INTO t(a,b) VALUES('abc',123),('def',456),(NULL,789),('ghi',012);
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SELECT * FROM t;</textarea>
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<div class='button-bar'>
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<button id='btn-run' disabled>Run</button>
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<button id='btn-clear' disabled>Clear</button>
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<button data-cmd='.help' disabled>Help</button>
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</div>
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</div>
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<div class='ta-wrapper'>
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<textarea id="output" rows="18" readonly
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placeholder="Shell output."></textarea>
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<div class='button-bar'>
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<button id='btn-clear-output' disabled>Clear</button>
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</div>
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</div>
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</div>
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<div id='notes-caveats'>
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<header>
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Notes and Caveats
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<button id='btn-notes-caveats'>Remove</button>
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</header>
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2022-05-19 01:58:34 +03:00
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<p>
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This JavaScript application runs a C application which has been
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compiled into WASM (Web Assembly). As such, it has certain
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limitations. Those include, but are not limited to:
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</p>
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<ul>
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<li>It <strong>cannot recover after a call to
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<code>exit()</code></strong>. If the native code triggers
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an exit, reloading the page is the only way to restart
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the application. (Making the app restartable without reloading
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the page would require significant surgery in the C code.)
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</li>
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<li>It <strong>cannot perform any file I/O</strong>, and running
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any command which attempts to do so might trigger an
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<code>exit()</code>.
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</li>
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<li>A number of dot-commands available in the CLI shell are
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explicitly removed from this version of the shell.
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</li>
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</ul>
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</div><!-- #notes-caveats -->
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<script type='text/javascript'>
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(function(){
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/* An object for propagating certain config state between our
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JS code and the WASM module. */
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const config = {
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/* If true, the Module.print() impl will auto-scroll
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the output widget to the bottom when it receives output,
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else it won't. */
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autoScrollOutput: true
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};
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/**
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Callback for the emscripten module init process, gets
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passed the module object after all parts of the module
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have been loaded and initialized.
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*/
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const doAppSetup = function(Module) {
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const taInput = document.querySelector('#input');
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const btnClearIn = document.querySelector('#btn-clear');
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document.querySelectorAll('button').forEach(function(e){
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e.removeAttribute('disabled');
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});
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btnClearIn.addEventListener('click',function(){
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taInput.value = '';
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},false);
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// Ctrl-enter and shift-enter both run the current SQL.
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taInput.addEventListener('keydown',function(ev){
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if((ev.ctrlKey || ev.shiftKey) && 13 === ev.keyCode){
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ev.preventDefault();
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ev.stopPropagation();
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btnRun.click();
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}
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}, false);
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const taOutput = document.querySelector('#output');
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const btnClearOut = document.querySelector('#btn-clear-output');
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btnClearOut.addEventListener('click',function(){
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taOutput.value = '';
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},false);
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const doExec = function f(sql){
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if(!f._) f._ = Module.cwrap('fiddle_exec', null, ['string']);
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if(Module._isDead){
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Module.printErr("shell module has exit()ed. Cannot run SQL.");
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}else{
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f._(sql);
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}
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};
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const btnRun = document.querySelector('#btn-run');
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btnRun.addEventListener('click',function(){
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const sql = taInput.value.trim();
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if(sql){
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doExec(sql);
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}
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},false);
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doExec(null)/*sets up the db and outputs the header*/;
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document.querySelector('#opt-cb-sbs')
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.addEventListener('change', function(){
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document.querySelector('#main-wrapper').classList[
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this.checked ? 'add' : 'remove'
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]('side-by-side');
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}, false);
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document.querySelector('#opt-cb-autoscroll')
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.addEventListener('change', function(){
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config.autoScrollOutput = this.checked;
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}, false);
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document.querySelector('#btn-notes-caveats')
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.addEventListener('click', function(){
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document.querySelector('#notes-caveats').remove();
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}, false);
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2022-05-19 00:18:21 +03:00
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/* For all buttons with data-cmd=X, map a click handler which
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calls doExec(X). */
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const cmdClick = function(){doExec(this.dataset.cmd);};
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document.querySelectorAll('button[data-cmd]').forEach(
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e => e.addEventListener('click', cmdClick, false)
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);
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};
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/**
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What follows is part of the emscripten core setup. Do not
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modify without understanding what it's doing...
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*/
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const statusElement = document.getElementById('status');
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const progressElement = document.getElementById('progress');
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const spinnerElement = document.getElementById('spinner');
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const Module = window.Module = {
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preRun: [],
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postRun: [],
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onRuntimeInitialized: function(){
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doAppSetup(this);
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},
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print: (function f() {
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if(!f._){
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f._ = document.getElementById('output');
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}
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f._.value = ''; // clear browser cache
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return function(text) {
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if(arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
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// These replacements are necessary if you render to raw HTML
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//text = text.replace(/&/g, "&");
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//text = text.replace(/</g, "<");
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//text = text.replace(/>/g, ">");
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//text = text.replace('\n', '<br>', 'g');
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//console.log("arguments",arguments);
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console.log(text);
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f._.value += text + "\n";
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if(config.autoScrollOutput){
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f._.scrollTop = f._.scrollHeight;
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}
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};
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})(),
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setStatus: function f(text) {
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if(!f.last) f.last = { time: Date.now(), text: '' };
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if(text === f.last.text) return;
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const m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
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const now = Date.now();
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if(m && now - f.last.time < 30) return; // if this is a progress update, skip it if too soon
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f.last.time = now;
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f.last.text = text;
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if(m) {
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text = m[1];
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progressElement.value = parseInt(m[2])*100;
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progressElement.max = parseInt(m[4])*100;
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progressElement.hidden = false;
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spinnerElement.hidden = false;
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} else {
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progressElement.value = null;
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progressElement.max = null;
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progressElement.hidden = true;
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if(!text) spinnerElement.hidden = true;
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}
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statusElement.innerHTML = text;
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},
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totalDependencies: 0,
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monitorRunDependencies: function(left) {
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this.totalDependencies = Math.max(this.totalDependencies, left);
|
2022-05-19 00:18:21 +03:00
|
|
|
this.setStatus(left
|
|
|
|
|
? ('Preparing... (' + (this.totalDependencies-left)
|
|
|
|
|
+ '/' + this.totalDependencies + ')')
|
|
|
|
|
: 'All downloads complete.');
|
2022-05-18 20:14:24 +03:00
|
|
|
}
|
|
|
|
|
};
|
2022-05-19 00:18:21 +03:00
|
|
|
Module.printErr = Module.print/*capture stderr output*/;
|
2022-05-18 20:14:24 +03:00
|
|
|
Module.setStatus('Downloading...');
|
2022-05-19 00:18:21 +03:00
|
|
|
window.onerror = function(/*message, source, lineno, colno, error*/) {
|
|
|
|
|
const err = arguments[4];
|
|
|
|
|
if(err && 'ExitStatus'==err.name){
|
2022-05-19 01:58:34 +03:00
|
|
|
Module._isDead = true;
|
2022-05-19 00:18:21 +03:00
|
|
|
Module.printErr("FATAL ERROR:", err.message);
|
|
|
|
|
Module.printErr("Restarting the app requires reloading the page.");
|
|
|
|
|
const taOutput = document.querySelector('#output');
|
|
|
|
|
if(taOutput) taOutput.classList.add('error');
|
|
|
|
|
}
|
2022-05-18 20:14:24 +03:00
|
|
|
Module.setStatus('Exception thrown, see JavaScript console');
|
|
|
|
|
spinnerElement.style.display = 'none';
|
|
|
|
|
Module.setStatus = function(text) {
|
2022-05-19 00:18:21 +03:00
|
|
|
if(text) console.error('[post-exception status] ' + text);
|
2022-05-18 20:14:24 +03:00
|
|
|
};
|
|
|
|
|
};
|
|
|
|
|
})();
|
|
|
|
|
</script>
|
|
|
|
|
{{{ SCRIPT }}}
|
|
|
|
|
</body>
|
|
|
|
|
</html>
|
