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Issue 9392005:
initial frogpad (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart| OLD | NEW |
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| 1 #!/usr/bin/python | |
| 2 | |
| 3 # Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 4 # for details. All rights reserved. Use of this source code is governed by a | |
| 5 # BSD-style license that can be found in the LICENSE file. | |
| 6 # | |
| 7 | |
| 8 """ | |
| 9 Generates an html file (frogpad.html) that can be used to execute the frog | |
| 10 compiler in a web browser or DumpRenderTree, | |
| 11 | |
| 12 The generated frogpad.html will contain: | |
| 13 | |
| 14 1. all the dart files that compose a dart program | |
| 15 2. all the dart files of dart:core and other standard dart libraries | |
| 16 3. frogpad.dart (compiled to javascript) | |
| 17 | |
| 18 The contents of each dart file is placed in a separate <script> tag. | |
| 19 | |
| 20 When the html page is loaded by a browser, the frog compiler will be invoked | |
| 21 and the user's dart program will be compiled to javascript. The generated | |
| 22 javascript will be placed in the <pre> element with id "output". | |
| 23 | |
| 24 If using DumpRenderTree, the output javascript can be obtained by dumping | |
| 25 the page as text and looking for the contents of the output textarea. | |
| 26 """ | |
| 27 | |
| 28 import optparse | |
| 29 import os.path | |
| 30 import re | |
| 31 import sys | |
| 32 | |
| 33 # Template for the html page we're going to generate. | |
| 34 HTML = """<html> | |
| 35 <head> | |
| 36 <style type="text/css"> | |
| 37 textarea { | |
| 38 width: 100%; | |
| 39 height: 200px; | |
| 40 } | |
| 41 .label { | |
| 42 margin-top: 5px; | |
| 43 } | |
| 44 pre { | |
| 45 border: 2px solid black; | |
| 46 } | |
| 47 </style> | |
| 48 {{script_tags}} | |
| 49 <script type="text/javascript"> | |
| 50 if (window.layoutTestController) { | |
| 51 layoutTestController.dumpAsText(); | |
| 52 } | |
| 53 </script> | |
| 54 </head> | |
| 55 <body> | |
| 56 <h1>Frogpad</h1> | |
| 57 <div class="label">Input:</div> | |
| 58 <textarea id="input"></textarea> | |
| 59 <div class="label">Compiler Messages:</div> | |
| 60 <pre id="warnings"></pre> | |
| 61 <div class="label">Timing:</div> | |
| 62 <pre id="timing"></pre> | |
| 63 <div class="label">Output:</div> | |
| 64 <pre id="output"></pre> | |
| 65 <script type="text/javascript" src="frogpad.dart.js" ></script> | |
| 66 </body> | |
| 67 </html> | |
| 68 """ | |
| 69 | |
| 70 # We use "application/inert" here to make the browser ignore the | |
| 71 # these script tags. (frogpad.dart will fish out the contents as needed.) | |
| 72 # | |
| 73 SCRIPT_TAG = """<script type="application/inert" id="{{id}}"> | |
| 74 {{contents}} | |
| 75 </script> | |
| 76 """ | |
| 77 | |
| 78 # Regex that finds #import, #source and #native directives in .dart files. | |
| 79 # match.group(1) = "import", "source" or "native" | |
| 80 # match.group(2) = url of file being imported | |
| 81 DIRECTIVE_RE = re.compile(r"^#(import|source|native)\([\"']([^\"']*)[\"']") | |
| 82 | |
| 83 # id of script tag that holds name of the top dart file to be compiled, | |
| 84 # (This file name passed will be passed to the frog compiler by frogpad.dart.) | |
| 85 MAIN_ID = "main_id" | |
| 86 | |
| 87 DART_LIBRARIES = { | |
| 88 "core": "lib/corelib.dart", | |
| 89 "coreimpl": "lib/corelib_impl.dart", | |
| 90 "html": "../client/html/release/html.dart", | |
| 91 "htmlimpl": "../client/html/release/htmlimpl.dart", | |
| 92 "dom": "../client/dom/frog/dom_frog.dart", | |
| 93 "json": "lib/json_frog.dart" | |
| 94 } | |
| 95 | |
| 96 | |
| 97 class Pad(object): | |
| 98 """ | |
| 99 Accumulates all source files that are needed to compile a dart program, | |
| 100 and places them in <script> tags on an html page. | |
| 101 """ | |
| 102 | |
| 103 def __init__(self, frog_dir, main_file): | |
| 104 # directory of frog compiler source code | |
| 105 self.frog_dir = frog_dir | |
| 106 | |
| 107 # which .dart file to compile | |
| 108 self.main_file = main_file | |
| 109 | |
| 110 # map from file name to File object (contains entries for all corelib | |
| 111 # and all other dart files needed to compile main_file) | |
| 112 self.name_to_file = {} | |
| 113 | |
| 114 # map from script tag id to File object | |
| 115 self.id_to_file = {} | |
| 116 | |
| 117 self.load_libraries() | |
| 118 self.load_file(self.main_file) | |
| 119 | |
| 120 def generate_html(self): | |
| 121 tags = [] | |
| 122 for f in self.id_to_file.values(): | |
| 123 tags.append(self._create_tag(f.id, f.contents)) | |
| 124 tags.append(self._create_tag(MAIN_ID, self.main_file)) | |
| 125 html = HTML.replace("{{script_tags}}", "".join(tags)) | |
| 126 return html | |
| 127 | |
| 128 @staticmethod | |
| 129 def _create_tag(id, contents): | |
|
Emily Fortuna
2012/02/14 19:56:53
Out of curiosity, are you using the starting _'s l
mattsh
2012/02/14 22:13:40
I thought that's the convention - search for _lowe
| |
| 130 s = SCRIPT_TAG | |
| 131 s = s.replace("{{id}}", id) | |
| 132 s = s.replace("{{contents}}", contents) | |
| 133 return s | |
| 134 | |
| 135 def dart_library(self, name): | |
| 136 path = DART_LIBRARIES[name] | |
| 137 if not path: | |
| 138 raise Exception("unrecognized 'dart:%s'", name) | |
| 139 return os.path.join(self.frog_dir, path) | |
| 140 | |
| 141 def load_libraries(self): | |
| 142 for name in DART_LIBRARIES: | |
| 143 self.load_file(self.dart_library(name)) | |
| 144 | |
| 145 def load_file(self, name): | |
| 146 name = os.path.abspath(name) | |
| 147 if name in self.name_to_file: | |
| 148 print "already loaded %s, skipping" % name | |
| 149 return | |
| 150 f = File(self, name) | |
| 151 self.name_to_file[f.name] = f | |
| 152 if f.id in self.id_to_file: | |
| 153 raise Exception("ambiguous id '%s'" % f.id) | |
| 154 self.id_to_file[f.id] = f | |
| 155 f.directives() | |
| 156 | |
| 157 class File(object): | |
| 158 def __init__(self, pad, name): | |
| 159 self.pad = pad | |
| 160 self.name = name | |
| 161 self.id = self._make_id() | |
| 162 if not os.path.exists(name): | |
| 163 raise Exception("cannot find file '%s'" % name) | |
| 164 with open(self.name, "r") as f: | |
| 165 self.contents = f.read() | |
| 166 print "creating File '%s' (%d lines)" % (self.name, len(self.contents)) | |
| 167 | |
| 168 def _make_id(self): | |
| 169 """ | |
| 170 Generates an id (based on the file name) for the <script> tag that will | |
| 171 hold the contents of this file. | |
| 172 """ | |
| 173 (dirname, name) = os.path.split(self.name) | |
| 174 dirname = os.path.basename(dirname) | |
| 175 name = name.replace(".", "_") | |
| 176 return dirname + "_" + name | |
| 177 | |
| 178 def directives(self): | |
| 179 """Load files referenced by #source, #import and #native directives.""" | |
| 180 lines = self.contents.split("\n") | |
| 181 self.line_number = 0 | |
| 182 for line in lines: | |
| 183 self.line_number += 1 | |
| 184 self._directive(line) | |
| 185 | |
| 186 def _directive(self, line): | |
| 187 match = DIRECTIVE_RE.match(line) | |
| 188 if not match: | |
| 189 return | |
| 190 url = match.group(2) | |
| 191 if url.startswith("dart:"): | |
| 192 path = self.pad.dart_library(url[len("dart:"):]) | |
| 193 else: | |
| 194 path = os.path.join(os.path.dirname(self.name), url) | |
| 195 self.pad.load_file(path) | |
| 196 | |
| 197 | |
| 198 def main(argv): | |
| 199 parser = optparse.OptionParser() | |
| 200 parser.add_option("-o", "--out", dest="out_file") | |
| 201 | |
| 202 (options, args) = parser.parse_args(argv) | |
| 203 main_file = os.path.abspath(args[1]) | |
| 204 | |
| 205 script_dir = os.path.abspath(os.path.dirname(argv[0])) | |
| 206 frog_dir = os.path.abspath(os.path.join(script_dir, os.pardir)) | |
| 207 | |
| 208 pad = Pad(frog_dir, main_file) | |
| 209 html = pad.generate_html() | |
| 210 | |
| 211 filename = "frogpad.html" | |
| 212 with open(filename, "w") as output: | |
| 213 output.write(html) | |
| 214 print "generated '%s' (%d bytes)" % (filename, len(html)) | |
| 215 | |
| 216 if __name__ == "__main__": | |
| 217 sys.exit(main(sys.argv)) | |
| 218 | |
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