M ColorDelegator.py

M PyShell.py
M ScriptBinding.py

1. Update ScriptBinding.py to highlight a syntax error in the Edit window,
   and place the cursor on the error.  Add a syntax check to the
   Run Script event instead of waiting until the script tries to run and
   raises a syntax error in the shell, forcing the user to navigate back
   to the Edit window to fix it.
2. Modify tag_config's appropriately in PyShell.py and ColorDelegator.py
3. Some minor clean-up in ScriptBinding.py

Lib/idlelib/ColorDelegator.py

@@ -63,6 +63,7 @@ class ColorDelegator(Delegator):
             "SYNC": {'background':None,'foreground':None},
             "TODO": {'background':None,'foreground':None},
             "BREAK": idleConf.GetHighlight(theme, "break"),
+            "ERROR": idleConf.GetHighlight(theme, "error"),
             # The following is used by ReplaceDialog:
             "hit": idleConf.GetHighlight(theme, "hit"),
             }

Lib/idlelib/PyShell.py

@@ -261,7 +261,6 @@ class ModifiedColorDelegator(ColorDelegator):
             "stdout": idleConf.GetHighlight(theme, "stdout"),
             "stderr": idleConf.GetHighlight(theme, "stderr"),
             "console": idleConf.GetHighlight(theme, "console"),
-            "ERROR": idleConf.GetHighlight(theme, "error"),
             None: idleConf.GetHighlight(theme, "normal"),
         })
 

Lib/idlelib/ScriptBinding.py

@@ -3,13 +3,13 @@
 This adds the following commands:
 
 - Check module does a full syntax check of the current module.
-It also runs the tabnanny to catch any inconsistent tabs.
+  It also runs the tabnanny to catch any inconsistent tabs.
 
 - Run module executes the module's code in the __main__ namespace.  The window
-must have been saved previously. The module is added to sys.modules, and is
-also added to the __main__ namespace.
+  must have been saved previously. The module is added to sys.modules, and is
+  also added to the __main__ namespace.
 
-XXX Redesign this interface (yet again) as follows:
+XXX GvR Redesign this interface (yet again) as follows:
 
 - Present a dialog box for ``Run script''
 
@@ -17,8 +17,14 @@ XXX Redesign this interface (yet again) as follows:
 
 """
 
+import re
+import string
+import tabnanny
+import tokenize
 import tkMessageBox
 
+IDENTCHARS = string.ascii_letters + string.digits + "_"
+
 indent_message = """Error: Inconsistent indentation detected!
 
 This means that either:
@@ -32,13 +38,14 @@ To fix case 2, change all tabs to spaces by using Select All followed \
 by Untabify Region (both in the Edit menu)."""
 
 
-# XXX TBD Implement stop-execution  KBK 11Jun02
+# XXX 11Jun02 KBK TBD Implement stop-execution
+
 class ScriptBinding:
 
     menudefs = [
         ('run', [None,
-                 ('Check module', '<<check-module>>'),
-                 ('Run script', '<<run-script>>'), ]), ]
+                 ('Check Module', '<<check-module>>'),
+                 ('Run Script', '<<run-script>>'), ]), ]
 
     def __init__(self, editwin):
         self.editwin = editwin
@@ -53,12 +60,9 @@ class ScriptBinding:
             return
         if not self.tabnanny(filename):
             return
-        if not self.checksyntax(filename):
-            return
+        self.checksyntax(filename)
 
     def tabnanny(self, filename):
-        import tabnanny
-        import tokenize
         f = open(filename, 'r')
         try:
             tabnanny.process_tokens(tokenize.generate_tokens(f.readline))
@@ -77,31 +81,46 @@ class ScriptBinding:
         source = f.read()
         f.close()
         if '\r' in source:
-            import re
             source = re.sub(r"\r\n", "\n", source)
         if source and source[-1] != '\n':
             source = source + '\n'
         try:
-            compile(source, filename, "exec")
+            # If successful, return the compiled code
+            return compile(source, filename, "exec")
         except (SyntaxError, OverflowError), err:
             try:
                 msg, (errorfilename, lineno, offset, line) = err
                 if not errorfilename:
                     err.args = msg, (filename, lineno, offset, line)
                     err.filename = filename
+                self.colorize_syntax_error(msg, lineno, offset)
             except:
-                lineno = None
                 msg = "*** " + str(err)
-            if lineno:
-                self.editwin.gotoline(lineno)
             self.errorbox("Syntax error",
                           "There's an error in your program:\n" + msg)
-        return True
-
+            return False
+        
+    def colorize_syntax_error(self, msg, lineno, offset):
+        text = self.editwin.text
+        pos = "0.0 + %d lines + %d chars" % (lineno-1, offset-1)
+        text.tag_add("ERROR", pos)
+        char = text.get(pos)
+        if char and char in IDENTCHARS:
+            text.tag_add("ERROR", pos + " wordstart", pos)
+        if '\n' == text.get(pos):   # error at line end
+            text.mark_set("insert", pos)
+        else:
+            text.mark_set("insert", pos + "+1c")
+        text.see(pos)
+        
     def run_script_event(self, event):
+        "Check syntax, if ok run the script in the shell top level"
         filename = self.getfilename()
         if not filename:
             return
+        code = self.checksyntax(filename)
+        if not code:
+            return
         flist = self.editwin.flist
         shell = flist.open_shell()
         interp = shell.interp
@@ -116,11 +135,10 @@ class ScriptBinding:
             from os.path import basename as _basename
             if (not _sys.argv or
                 _basename(_sys.argv[0]) != _basename(_filename)):
-                # XXX 25 July 2002 KBK should this be sys.argv not _sys.argv?
                 _sys.argv = [_filename]
-            del _filename, _sys, _basename
+                del _filename, _sys, _basename
                 \n""" % `filename`)
-        interp.execfile(filename)
+        interp.runcode(code)
 
     def getfilename(self):
         # Logic to make sure we have a saved filename