diff options
Diffstat (limited to 'demos/python.html')
| -rw-r--r-- | demos/python.html | 65 |
1 files changed, 43 insertions, 22 deletions
diff --git a/demos/python.html b/demos/python.html index 04684072..f49dc910 100644 --- a/demos/python.html +++ b/demos/python.html @@ -1,7 +1,7 @@ <html> <head> <title> - Emscripten: Python + Python on the Web </title> <link id="bespin_base" href="skywriter/"/> <script src="skywriter/BespinEmbedded.js"></script> @@ -13,26 +13,44 @@ </style> <!-- - Changes from automatically generated code: + The attached python.js (or python.cc.js) is CPython 2.7.1, licensed under + the PSF: http://docs.python.org/license.html - * At the beginning, add |arguments=[]| before |var args=arguments|; + Additional steps to create this demo: - * In |_PyRun_SimpleStringFlags|, add - - if(!this.RAN_ALREADY){this.RAN_ALREADY=true;throw "halting, since this is the first run" } - - * At the end, comment out |run(args)|. + * Compile with _PyRun_SimpleStringFlags exported in EXPORTED_FUNCTIONS + * Find the actual name of that function (closure changes it, see .vars), and use it as per the XXX comment below. --> - <script src="python.js"></script> - <script> + var Module = { + noInitialRun: true + }; + </script> + <script src="python.cc.js"></script> + <script> + var orig = Module._PyRun_SimpleStringFlags; + var RAN_ALREADY; + QDb = function() { // XXX Have the actual name here! See comment above. + if(!RAN_ALREADY) { + RAN_ALREADY = true; + throw "halting, since this is the first run"; + } + orig.apply(null, arguments); + } + // print function which the Python engine will call var lines = [], printed = false; - function print(text) { + function print(text, force) { + //force = true; // XXX - for debugging lines.push(text); printed = true; + + if (force) { + var element = document.getElementById('output'); + element.innerHTML = text; + } } function execute(text) { @@ -42,11 +60,13 @@ var element = document.getElementById('output'); if (!element) return; // perhaps during startup - var ptr = Module.Pointer_make(Module.intArrayFromString(text), 0, 2); // leak! + var ptr = Module.Pointer_make(Module.intArrayFromString(text), 0, 2, 'i8'); // leak! try { Module._PyRun_SimpleStringFlags(ptr, 0); } catch(e) { - if (e === 'halting, since this is the first run') return; + if (e === 'halting, since this is the first run') { + return; + } element.innerHTML = 'JS crash: |<b>' + e + '</b>|. Please let us know about this problem!<hr>' + element.innerHTML; return; } @@ -61,14 +81,14 @@ var editor; function doRun() { - args = ['-S', '-c', 'print ""']; + args = ['-S', '-c', 'print 5']; try { Module.run(args); } catch (e) { - if (e !== 'halting, since this is the first run') throw e; + if (e !== 'halting, since this is the first run') { + throw e; + } } - execute(""); - setTimeout(function() { if (!bespin.useBespin) setTimeout(arguments.callee, 10); bespin.useBespin(document.getElementById('the_input'), { "stealFocus":true, "syntax": "python" }).then(function(env) { @@ -80,17 +100,19 @@ </script> </head> <body onload="doRun(); document.getElementById('the_input').focus()"> + <h1>Python on the Web</h1> <p> This is CPython, the standard <a href="http://www.python.org">Python</a> implementation, compiled from C to JavaScript using <a href="http://emscripten.org">Emscripten</a>, - running in your browser (without any plugins). + running in your browser (without any plugins). It is both a tech demo and also a usable tool, for example, to + assist in teaching people Python by just visiting a website (instead of installing Python locally). </p> <p> + Notes: <ul> <li>Most core language stuff should work, except for importing non-static modules (in other words, <code>import sys</code> will work, but other modules won't).</li> <li>Please report bugs if you find them!</li> - <li>Tested on Firefox 4 and Chrome 10.</li> <li>The editor is <a href="https://mozillalabs.com/skywriter/">Skywriter</a>. </ul> </p> @@ -100,9 +122,8 @@ <b>Enter some Python</b>: <input type="submit" value="execute"> <div id="the_input">import sys -print 'Hello world! This is Python {} on {}'.format(sys.version, sys.platform) - -print 'Here are some numbers:', [2*x for x in range(5)][:4] +print 'Hello %s, here are some numbers:' % raw_input('What is your name?'), [2*x for x in range(5)][:4] +print 'This is Python {} on {}'.format(sys.version, sys.platform) </div> </form> <hr> |