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Tim Peters smart.patch:

Browse Source 
EditorWindow.py:

+ Added get_tabwidth & set_tabwidth "virtual text" methods, that get/set the
widget's view of what a tab means.

+ Moved TK_TABWIDTH_DEFAULT here from AutoIndent.

+ Renamed Mark's get_selection_index to get_selection_indices (sorry, Mark,
but the name was plain wrong <wink>).

FormatParagraph.py:  renamed use of get_selection_index.

AutoIndent.py:

+ Moved TK_TABWIDTH_DEFAULT to EditorWindow.

+ Rewrote set_indentation_params to use new VTW get/set_tabwidth methods.

+ Changed smart_backspace_event to delete whitespace back to closest
preceding virtual tab stop or real character (note that this may require
inserting characters if backspacing over a tab!).

+ Nuked almost references to the selection tag, in favor of using
get_selection_indices.  The sole exception is in set_region, for which no
"set_selection" abstraction has yet been agreed upon.

+ Had too much fun using the spiffy new features of the format-paragraph
cmd.
This commit is contained in:
Guido van Rossum 1999-06-11 15:03:00 +00:00
parent 5eb992beed
commit 13205609c5
3 changed files with 77 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

112
Tools/idle/AutoIndent.py
View File

@ -3,9 +3,6 @@ import string
#import tkMessageBox
#import tkSimpleDialog
# The default tab setting for a Text widget, in average-width characters.
TK_TABWIDTH_DEFAULT = 8
###$ event <<newline-and-indent>>
###$ win <Key-Return>
###$ win <KP_Enter>
@ -101,7 +98,7 @@ class AutoIndent:
# Nobody expects this, so for now tabwidth should never be changed.
usetabs = 1
indentwidth = 4
tabwidth = TK_TABWIDTH_DEFAULT
tabwidth = 8 # for IDLE use, must remain 8 until Tk is fixed
# If context_use_ps1 is true, parsing searches back for a ps1 line;
# else searches for a popular (if, def, ...) Python stmt.
@ -139,8 +136,6 @@ class AutoIndent:
# character means.
def set_indentation_params(self, ispythonsource, guess=1):
text = self.text
if guess and ispythonsource:
i = self.guess_indent()
if 2 <= i <= 8:
@ -148,39 +143,47 @@ class AutoIndent:
if self.indentwidth != self.tabwidth:
self.usetabs = 0
current_tabs = text['tabs']
if current_tabs == "" and self.tabwidth == TK_TABWIDTH_DEFAULT:
pass
else:
# Reconfigure the Text widget by measuring the width
# of a tabwidth-length string in pixels, forcing the
# widget's tab stops to that.
need_tabs = text.tk.call("font", "measure", text['font'],
"-displayof", text.master,
"n" * self.tabwidth)
if current_tabs != need_tabs:
text.configure(tabs=need_tabs)
self.editwin.set_tabwidth(self.tabwidth)
def smart_backspace_event(self, event):
text = self.text
try:
first = text.index("sel.first")
last = text.index("sel.last")
except: # Was catching TclError, but this doesnt work for
first = last = None
first, last = self.editwin.get_selection_indices()
if first and last:
text.delete(first, last)
text.mark_set("insert", first)
return "break"
# If we're at the end of leading whitespace, nuke one indent
# level, else one character.
# Delete whitespace left, until hitting a real char or closest
# preceding virtual tab stop.
chars = text.get("insert linestart", "insert")
raw, effective = classifyws(chars, self.tabwidth)
if 0 < raw == len(chars):
if effective >= self.indentwidth:
self.reindent_to(effective - self.indentwidth)
return "break"
text.delete("insert-1c")
if chars == '':
if text.compare("insert", ">", "1.0"):
# easy: delete preceding newline
text.delete("insert-1c")
else:
text.bell() # at start of buffer
return "break"
if chars[-1] not in " \t":
# easy: delete preceding real char
text.delete("insert-1c")
return "break"
# Ick. It may require *inserting* spaces if we back up over a
# tab character! This is written to be clear, not fast.
expand, tabwidth = string.expandtabs, self.tabwidth
have = len(expand(chars, tabwidth))
assert have > 0
want = int((have - 1) / self.indentwidth) * self.indentwidth
ncharsdeleted = 0
while 1:
chars = chars[:-1]
ncharsdeleted = ncharsdeleted + 1
have = len(expand(chars, tabwidth))
if have <= want or chars[-1] not in " \t":
break
text.undo_block_start()
text.delete("insert-%dc" % ncharsdeleted, "insert")
if have < want:
text.insert("insert", ' ' * (want - have))
text.undo_block_stop()
return "break"
def smart_indent_event(self, event):
@ -190,11 +193,7 @@ class AutoIndent:
# do indent-region & return
# indent one level
text = self.text
try:
first = text.index("sel.first")
last = text.index("sel.last")
except: # Was catching TclError, but this doesnt work for
first = last = None
first, last = self.editwin.get_selection_indices()
text.undo_block_start()
try:
if first and last:
@ -223,11 +222,7 @@ class AutoIndent:
def newline_and_indent_event(self, event):
text = self.text
try:
first = text.index("sel.first")
last = text.index("sel.last")
except: # Was catching TclError, but this doesnt work for
first = last = None
first, last = self.editwin.get_selection_indices()
text.undo_block_start()
try:
if first and last:
@ -256,8 +251,8 @@ class AutoIndent:
# start new line
text.insert("insert", '\n')
# adjust indentation for continuations and block open/close
# first need to find the last stmt
# adjust indentation for continuations and block
# open/close first need to find the last stmt
lno = index2line(text.index('insert'))
y = PyParse.Parser(self.indentwidth, self.tabwidth)
for context in self.num_context_lines:
@ -280,15 +275,15 @@ class AutoIndent:
elif c == PyParse.C_BRACKET:
# line up with the first (if any) element of the
# last open bracket structure; else indent one
# level beyond the indent of the line with the last
# open bracket
# level beyond the indent of the line with the
# last open bracket
self.reindent_to(y.compute_bracket_indent())
elif c == PyParse.C_BACKSLASH:
# if more than one line in this stmt already, just
# mimic the current indent; else if initial line has
# a start on an assignment stmt, indent to beyond
# leftmost =; else to beyond first chunk of non-
# whitespace on initial line
# mimic the current indent; else if initial line
# has a start on an assignment stmt, indent to
# beyond leftmost =; else to beyond first chunk of
# non-whitespace on initial line
if y.get_num_lines_in_stmt() > 1:
text.insert("insert", indent)
else:
@ -298,8 +293,8 @@ class AutoIndent:
return "break"
# This line starts a brand new stmt; indent relative to
# indentation of initial line of closest preceding interesting
# stmt.
# indentation of initial line of closest preceding
# interesting stmt.
indent = y.get_base_indent_string()
text.insert("insert", indent)
if y.is_block_opener():
@ -313,9 +308,10 @@ class AutoIndent:
auto_indent = newline_and_indent_event
# Our editwin provides a is_char_in_string function that works with
# a Tk text index, but PyParse only knows about offsets into a string.
# This builds a function for PyParse that accepts an offset.
# Our editwin provides a is_char_in_string function that works
# with a Tk text index, but PyParse only knows about offsets into
# a string. This builds a function for PyParse that accepts an
# offset.
def _build_char_in_string_func(self, startindex):
def inner(offset, _startindex=startindex,
@ -413,9 +409,11 @@ class AutoIndent:
def get_region(self):
text = self.text
head = text.index("sel.first linestart")
tail = text.index("sel.last -1c lineend +1c")
if not (head and tail):
first, last = self.editwin.get_selection_indices()
if first and last:
head = text.index(first + " linestart")
tail = text.index(last + "-1c lineend +1c")
else:
head = text.index("insert linestart")
tail = text.index("insert lineend +1c")
chars = text.get(head, tail)

22
Tools/idle/EditorWindow.py
View File

@ -9,6 +9,9 @@ import tkMessageBox
import idlever
import WindowList
# The default tab setting for a Text widget, in average-width characters.
TK_TABWIDTH_DEFAULT = 8
# File menu
#$ event <<open-module>>
@ -599,7 +602,7 @@ class EditorWindow:
# If a selection is defined in the text widget, return (start,
# end) as Tkinter text indices, otherwise return (None, None)
def get_selection_index(self):
def get_selection_indices(self):
try:
first = self.text.index("sel.first")
last = self.text.index("sel.last")
@ -607,6 +610,23 @@ class EditorWindow:
except TclError:
return None, None
# Return the text widget's current view of what a tab stop means
# (equivalent width in spaces).
def get_tabwidth(self):
current = self.text['tabs'] or TK_TABWIDTH_DEFAULT
return int(current)
# Set the text widget's current view of what a tab stop means.
def set_tabwidth(self, newtabwidth):
text = self.text
if self.get_tabwidth() != newtabwidth:
pixels = text.tk.call("font", "measure", text["font"],
"-displayof", text.master,
"n" * newtabwith)
text.configure(tabs=pixels)
def prepstr(s):
# Helper to extract the underscore from a string, e.g.
# prepstr("Co_py") returns (2, "Copy").

2
Tools/idle/FormatParagraph.py
View File

@ -38,7 +38,7 @@ class FormatParagraph:
def format_paragraph_event(self, event):
text = self.editwin.text
first, last = self.editwin.get_selection_index()
first, last = self.editwin.get_selection_indices()
if first and last:
data = text.get(first, last)
comment_header = ''