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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+'''
+pytagomacs – An Emacs like key–value editor library for Python
+
+Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+'''
+from editor import *
+
+
+class Line():
+ '''
+ A line in the text area
+ '''
+
+ def __init__(self, area, name, text, y):
+ '''
+ Constructor
+
+ @param area:TextArea The text area
+ @param name:str The name of the, displayed at the left side
+ @param text:str The text in the line
+ @param y:int The y position of the line
+
+ '''
+ self.area, self.name, self.text, self.y = area, name, text, y
+ self.killring = self.area.killring
+ self.jump = lambda x : Jump(self.area.top + self.y - self.area.offy, self.area.left + self.area.innerleft + x)
+
+
+ def is_active(self):
+ '''
+ Checks if the line is the focused line
+
+ @return :bool Whether the line is the focused line
+ '''
+ return self.area.y == self.y
+
+
+ def has_selection(self):
+ '''
+ Checks if there is any text selected, assuming the line is focused
+
+ @param :bool Whether there is any text selected
+ '''
+ return atleast(self.area.mark, 0) and (self.area.mark != self.area.x)
+
+
+ def draw(self):
+ '''
+ Redraw the line
+ '''
+ if 0 <= self.y - self.area.offy < self.area.height - 2:
+ leftside = ACTIVE_COLOUR if self.is_active() else INACTIVE_COLOUR
+ if leftside is not None:
+ leftside = '%s\033[%sm%s:\033[00m' % (self.jump(-(self.area.innerleft)), leftside, self.name)
+ else:
+ leftside = '%s%s:' % (self.jump(-(self.area.innerleft)), self.name)
+ text = (self.text[self.area.offx if self.is_active() else 0:] + ' ' * self.area.areawidth)[:self.area.areawidth]
+ if self.is_active() and atleast(self.area.mark, 0):
+ (a, b) = self.area.get_selection(True)
+ if a != b:
+ if SELECTED_COLOUR is not None:
+ text = text[:a] + ('\033[%sm%s\033[00m' % (SELECTED_COLOUR, text[a : b])) + text[b:]
+ print('%s%s%s' % (leftside, self.jump(0), text), end='')
+ if self.is_active():
+ self.jump(self.area.x - self.area.offx)()
+
+
+ def copy(self):
+ '''
+ Copy the selected text
+
+ @return :bool Whether any text select, and therefore copied
+ '''
+ if self.has_selection():
+ (a, b) = self.area.get_selection()
+ self.killring.add(self.text[a : b])
+ (a, b) = self.area.get_selection(True)
+ text = self.text[self.area.offx:][:self.area.areawidth][a : b]
+ print('%s%s' % (self.jump(a), text), end='')
+ self.area.mark = None
+ return True
+ return False
+
+
+ def cut(self):
+ '''
+ Cut the selected text
+
+ @return :bool Whether any text select, and therefore cut
+ '''
+ mark, x = self.area.mark, self.area.x
+ if self.copy():
+ self.area.mark, self.area.x = mark, x
+ self.delete()
+ return True
+ return False
+
+
+ def kill(self):
+ '''
+ Cut all text on the same line after the position of the point
+
+ @return :bool Whether the point was not at the end of the line, and therefore a cut was made
+ '''
+ if self.area.x < len(self.text):
+ self.area.mark = len(self.text)
+ self.cut()
+ return True
+ return False
+
+
+ def delete(self):
+ '''
+ Delete the selected text or, if none, the character at the position of the point
+
+ @return :bool The point was not at the end of the line or something was selected, and therefore a deletion was made
+ '''
+ removed = 0
+ if self.has_selection():
+ (a, b) = self.area.get_selection()
+ self.text = self.text[:a] + self.text[b:]
+ self.area.x = a
+ if self.area.offx > len(self.text):
+ self.area.offx = max(len(self.text) - self.area.areawidth, 0)
+ self.area.mark = None
+ print('%s%s' % (self.jump(0), ' ' * self.area.areawidth), end='')
+ self.draw()
+ return True
+ removed = b - a
+ self.area.mark = None
+ if removed == 0:
+ if self.area.x == len(self.text):
+ return False
+ removed = 1
+ self.text = self.text[:self.area.x] + self.text[self.area.x + 1:]
+ text = self.text[self.area.offx:][:self.area.areawidth]
+ a = limit(0, self.area.x - self.area.offx, self.area.areawidth)
+ print('%s%s%s' % (self.jump(a), text[a:] + ' ' * removed, self.jump(a)), end='')
+ return True
+
+
+ def erase(self):
+ '''
+ Select the selected text or the character directly before the position of the point
+
+ @return :bool Whether point as at the beginning of the line or any text was selected, and therefore an erasure was made
+ '''
+ if not self.has_selection():
+ self.area.mark = None
+ if self.area.x == 0:
+ return False
+ self.area.x -= 1
+ if self.area.x < self.area.offx:
+ self.area.offx = max(self.area.offx - self.area.areawidth, 0)
+ self.draw()
+ self.jump(self.area.x - self.area.offx)()
+ self.delete()
+ return True
+
+
+ def yank(self):
+ '''
+ Yank the text from the top of the killring
+
+ @return :bool Whether the killring was not empty, and therefor a yank was made
+ '''
+ if self.killring.is_empty():
+ return False
+ self.area.mark = None
+ yanked = self.killring.get()
+ self.text = self.text[:self.area.x] + yanked + self.text[self.area.x:]
+ self.area.x += len(yanked)
+ if self.area.x > self.area.offx + self.area.areawidth:
+ self.area.offx = len(self.text) - self.area.areawidth
+ print('%s%s' % (self.jump(0), ' ' * self.area.areawidth), end='')
+ self.draw()
+ self.jump(self.area.x - self.area.offx)()
+ return True
+
+
+ def yank_cycle(self):
+ '''
+ Replace the recently yank text with the next in the killring
+
+ @return :bool False on failure, which happens if the killring is empty or if the text before the point is not the yanked text
+ '''
+ if self.killring.is_empty():
+ return False
+ yanked = self.killring.get()
+ if self.text[max(self.area.x - len(yanked), 0) : self.area.x] != yanked:
+ return False
+ self.area.mark = self.area.x - len(yanked)
+ self.delete()
+ self.killring.next()
+ self.yank()
+ return True
+
+
+ def move_point(self, delta):
+ '''
+ Move the the point
+
+ @param delta:int The number of steps to move the point to the right
+ @return :bool Whether the point has been moved
+ '''
+ x = self.area.x + delta
+ if 0 <= x <= len(self.text):
+ self.area.x = x
+ if delta < 0:
+ if self.area.offx > self.area.x:
+ self.area.offx = max(self.area.x - 3 * self.area.areawidth // 4, 0)
+ self.draw()
+ else:
+ print('\033[%iD' % -delta, end='')
+ elif delta > 0:
+ if self.area.x - self.area.offx > self.area.areawidth:
+ self.area.offx = self.area.x - self.area.areawidth // 4
+ self.draw()
+ else:
+ print('\033[%iC' % delta, end='')
+ return delta != 0
+ return False
+
+
+ def swap_mark(self):
+ '''
+ Swap the position of the mark and the position of the point
+
+ @return :bool Whether the mark was set, and therefore as swap was made
+ '''
+ if atleast(self.area.mark, 0):
+ self.area.mark, self.area.x = self.area.x, self.area.mark
+ return True
+ return False
+
+
+ def override(self, insert, override = True):
+ '''
+ Insert a text (by default) by overriding the existing text at the position of the point
+
+ @param insert:str The text to insert
+ @param override:bool Whether to override
+ '''
+ if atleast(self.area.mark, 0):
+ self.area.mark = ~(self.area.mark)
+ if len(insert) == 0:
+ return
+ a, b = self.area.x, self.area.x
+ if override:
+ b = min(self.area.x + len(insert), len(self.text))
+ self.text = self.text[:a] + insert + self.text[b:]
+ oldx = self.area.x
+ self.area.x += len(insert)
+ if self.area.x - self.area.offx < self.area.areawidth:
+ if not override:
+ print('%s\033[%iP' % (self.jump(self.area.areawidth - len(insert)), len(insert)), end='')
+ print('%s\033[%i@' % (self.jump(oldx - self.area.offx), len(insert)), end='')
+ print(insert, end='')
+ else:
+ self.area.offx = self.area.x - self.area.areawidth // 4
+ self.jump(0)()
+ print(' ' * self.area.areawidth, end='')
+ self.draw()
+
+
+ def insert(self, insert):
+ '''
+ Insert a text at the position of the point
+
+ @param insert:str The text to insert
+ '''
+ self.override(insert, False)
+
generated by cgit v1.2.3-70-g09d2 (git 2.51.0) at 2026-02-20 18:43:33 +0000