methodxx

--HG--
branch : pmacs2

README

@@ -2,8 +2,8 @@ Pmacs
 
 by Erik Osheim <erik@osheim.org>
 
-Pmacs is an Emacs-like editor written entirely in Python. It is designed to have
+Pmacs is an Emacs-like editor written entirely in Python. It is designed to
-maximally correct and powerful support for syntax highlighting, to support
+have maximally correct and powerful support for syntax highlighting, to support
 various methods of automatically indenting lines, and to be extensible in
 python.
 

method/__init__.py

@@ -2,8 +2,6 @@ import os, commands, popen2, re, sets, tempfile
 import buffer, default, dirutil, regex, util, window
 from point import Point
 
-WHITESPACE = [' ', '\n']
-
 DATATYPES = {
     "path":         None,
     "buffer":       None,
@@ -467,7 +465,7 @@ class DeleteLeftWhitespace(Method):
         l = w.point_left(p)
         if l is None:
             return
-        while l is not None and w.point_char(l) in WHITESPACE:
+        while l is not None and w.point_char(l) in (' ', '\n'):
             p = l
             l = w.point_left(p)
         if p < c:
@@ -477,7 +475,32 @@ class DeleteRightWhitespace(Method):
     def _execute(self, w, **vargs):
         c = w.logical_cursor()
         p = c
-        while w.point_char(p) in WHITESPACE:
+        while w.point_char(p) in (' ', '\n'):
+            r = w.point_right(p)
+            if r is None:
+                break
+            p = r
+        if p > c:
+            w.kill(c, p)
+class DeleteLeftSpace(Method):
+    '''Delete all contiguous spaces left of the cursor'''
+    def _execute(self, w, **vargs):
+        c = w.logical_cursor()
+        p = c
+        l = w.point_left(p)
+        if l is None:
+            return
+        while l is not None and w.point_char(l) == ' ':
+            p = l
+            l = w.point_left(p)
+        if p < c:
+            w.kill(p, c)
+class DeleteRightSpace(Method):
+    '''Delete all contiguous spaces under and right of the cursor'''
+    def _execute(self, w, **vargs):
+        c = w.logical_cursor()
+        p = c
+        while w.point_char(p) == ' ':
             r = w.point_right(p)
             if r is None:
                 break
@@ -763,33 +786,90 @@ class WrapParagraph(WrapLine):
             w.buffer.insert_string(Point(len(w.buffer.lines[-1], len(w.buffer.lines) - 1)), '\n')
         w.goto(Point(x, y))
 class WrapParagraph2(Method):
-    limit = 80
+    limit     = 80
-    wrapper = WrapLine
+    wrapper   = WrapLine
-    spacer = InsertSpace
+    spacer    = InsertSpace
-    empty_re = regex.whitespace
+    empty_re  = regex.whitespace
     prefix_re = None
     def _execute(self, w, **vargs):
-        old_cursor = w.logical_cursor()
+        # we will store the start of our paragaph in p1, and also the original
-        i = old_cursor.y
+        # cursor position.
-        while i < len(w.buffer.lines) - 1:
+        p1 = oldc = w.logical_cursor()
-            if i < len(w.buffer.lines) and \
+        cur_offset = 0
-                self.empty_re.match(w.buffer.lines[i + 1]):
+
+        # see if we are starting in the middle of the paragraph; if so, then
+        # let's find the actual begining, and update p1 accordingly.
+        i = p1.y
+        if i > 1 and w.buffer.lines[i] and not w.buffer.lines[i].startswith(' '):
+            while i > 1 and w.buffer.lines[i - 1] and not w.buffer.lines[i - 1].startswith(' '):
+                i -= 1
+            p1 = Point(0, i)
+
+        # get the first line; strip it, and put it in our new lines list.
+        s1 = w.buffer.lines[p1.y][p1.x:]
+        s2 = s1.rstrip()
+        if p1.y <= oldc.y:
+            cur_offset += len(s1) - len(s2)
+        lines = [s2]
+
+        # ok, so now let's move forward and find the end of the paragraph.
+        i = p1.y + 1
+        while i < len(w.buffer.lines) and w.buffer.lines[i] and not w.buffer.lines[i].startswith(' '):
+            s1 = w.buffer.lines[i]
+            s2 = s1.rstrip()
+            if oldc.y == i:
+                # once we've adjusted all our previous lines, adjust our
+                # stored cursor to keep it's X and Y in sync (set Y to the line
+                # the paragraph started on, increase X by the previous lines
+                # plus added spaces minus removed whitespace.
+                x = p1.x + oldc.x + sum([len(x) + 1 for x in lines]) - cur_offset
+                oldc = Point(x, p1.y)
+            elif i < oldc.y:
+                cur_offset += len(s1) - len(s2)
+            lines.append(s2)
+            i += 1
+
+        # stringify our paragraph
+        s = " ".join(lines)
+
+        # ok, so now we need to find the line breaks
+        newlines = []
+        while s:
+            # if we have less than the limit left, add it and we're done!
+            if len(s) < self.limit:
+                newlines.append(s)
                 break
-            EndOfLine().execute(w)
+
-            self.spacer().execute(w)
+            # look for the rightmost space within our bounds
-            DeleteRightWhitespace().execute(w)
+            j = s.rfind(' ', 0, self.limit)
-        w.goto(old_cursor)
+            # if we failed to find one, look for the leftmost space
-        self.wrapper().execute(w)
+            if j == -1:
-        new_cursor = w.logical_cursor()
+                j = s.find(' ')
-        if new_cursor.y >= len(w.buffer.lines):
+            # if we failed to find any, use the whole rest of the paragraph
-            while new_cursor.y >= len(w.buffer.lines):
+            if j == -1:
-                w.buffer.insert_string(Point(len(w.buffer.lines[-1]), len(w.buffer.lines) - 1), "\n")
+                j = len(s)
-            w.goto(Point(0, new_cursor.y))
+            # add the next chunk we found and adjust the paragraph
+            newlines.append(s[:j])
+            s = s[j + 1:]
+
+        # translate our cursor according to the line breaks we just did.
+        (x, y) = oldc.xy()
+        k = 0
+        while x > len(newlines[k]):
+            x = x - len(newlines[k]) - 1
+            y += 1
+            k += 1
+        #raise Exception, (x, y)
+
+        # kill the old paragraph region, insert the new, and goto the new cursor
+        w.kill(p1, Point(len(w.buffer.lines[i-1]), i-1))
+        w.insert_lines(p1, newlines)
+        w.goto(Point(x, y))
 
 class JustifyRight(Method):
     '''Justify text with the previous line right from the cursor by whitespace'''
     def _execute(self, w, **vargs):
-        DeleteLeftWhitespace().execute(w)
+        DeleteLeftSpace().execute(w)
         cursor = w.logical_cursor()
         prev_line = w.buffer.lines[cursor.y-1]
         this_line = w.buffer.lines[cursor.y]

mode/text.py

@@ -50,7 +50,7 @@ class Text(mode.Fundamental):
         mode.Fundamental.__init__(self, w)
         self.add_action_and_bindings(LearnWord(), ('C-c l',))
         self.add_action_and_bindings(TextInsertSpace(), ('SPACE',))
-        self.add_action_and_bindings(method.WrapParagraph(), ('M-q',))
+        self.add_action_and_bindings(method.WrapParagraph2(), ('M-q',))
 
 class TextInsertSpace(method.Method):
     limit   = 80