From: Simon Tatham <anakin@pobox.com>
Date: Fri, 8 Dec 2023 12:59:59 +0000 (+0000)
Subject: ^K and ^Y for copy and paste to end of line.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=3710d1381669531623e35315226fc05bb0cdd0a6;p=mastodonochrome.git

^K and ^Y for copy and paste to end of line.

Well, end of _paragraph_, for the moment. Perhaps end of line would be
better. But my immediate use cases won't care about the difference:

 - ^W^K to delete the last word I typed at the end of a paragraph
 - dealing with code snippets which don't wrap anyway
---

diff --git a/cursesclient.py b/cursesclient.py
index 716a4bd..3a8479f 100644
--- a/cursesclient.py
+++ b/cursesclient.py
@@ -870,6 +870,7 @@ class Composer(Activity):
         self.text = initial_text
         self.point = len(self.text)
         self.goal_column = None
+        self.ctrl_k_paste_buffer = ""
         self.mode = 'normal'
 
         instance_data = self.cc.get("instance")
@@ -922,6 +923,15 @@ class Composer(Activity):
     def move_to(self, pos):
         self.point = max(0, min(len(self.text), pos))
 
+    def word_boundary(self, pos):
+        if pos == 0 or pos == len(self.text):
+            return True
+        if self.text[pos-1] == '\n' or self.text[pos] == '\n':
+            return True
+        if self.text[pos-1] == ' ' and self.text[pos] != ' ':
+            return True
+        return False
+
     def handle_key(self, ch):
         is_updown = ch in {ctrl('n'), ctrl('p'),
                            curses.KEY_DOWN, curses.KEY_UP}
@@ -931,15 +941,12 @@ class Composer(Activity):
         if self.mode == 'normal':
             # TODO:
             #
-            # ^W,^T are Mono's keys for moving back/forward a word.
-            #
-            # Not sure what to do about ^K/^Y for one-line cut-paste, given
-            # that the autowrap makes the semantics a bit weird compared to
-            # the original setup.
+            # Might still want to change ^K so that it stops at end of
+            # current screen line, instead of end of paragraph.
             #
-            # Probably don't want to exactly replicate the block
-            # operations either. Perhaps I should invent my own more sensible
-            # approach to cut, copy and paste.
+            # Maybe an extra copy/paste approach with explicit
+            # selection start/end points? Probably don't want to
+            # replicate Mono's underpowered [^O][B] business.
 
             if ch in {ctrl('b'), curses.KEY_LEFT}:
                 self.move_to(self.point - 1)
@@ -1004,6 +1011,24 @@ class Composer(Activity):
                         self.point += 1
                         if self.word_boundary(self.point):
                             break
+            elif ch in {ctrl('k')}:
+                if self.point < len(self.text):
+                    if self.text[self.point] == '\n':
+                        self.text = (self.text[:self.point] +
+                                     self.text[self.point+1:])
+                    else:
+                        try:
+                            endpos = self.text.index('\n', self.point)
+                        except ValueError:
+                            endpos = len(self.text)
+                        self.ctrl_k_paste_buffer = self.text[self.point:endpos]
+                        self.text = (self.text[:self.point] +
+                                     self.text[endpos:])
+            elif ch in {ctrl('y')}:
+                self.text = (
+                    self.text[:self.point] + self.ctrl_k_paste_buffer +
+                    self.text[self.point:])
+                self.point += len(self.ctrl_k_paste_buffer)
             elif ch in {'\r', '\n'}:
                 self.text = (self.text[:self.point] + '\n' +
                              self.text[self.point:])