430 lines
15 KiB
Python
430 lines
15 KiB
Python
#!/usr/bin/env python
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# vim:fileencoding=utf-8
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# License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
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import os
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import sys
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import warnings
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from collections import defaultdict
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from functools import partial
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from gettext import gettext as _
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from kitty.cli import CONFIG_HELP, appname, parse_args
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from kitty.fast_data_types import wcswidth
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from kitty.key_encoding import RELEASE
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from ..tui.handler import Handler
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from ..tui.images import ImageManager
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from ..tui.loop import Loop
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from ..tui.operations import styled
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from .collect import (
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create_collection, data_for_path, lines_for_path, set_highlight_data
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)
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from .config import init_config
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from .patch import Differ, set_diff_command
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from .render import ImageSupportWarning, LineRef, render_diff
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try:
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from .highlight import initialize_highlighter, highlight_collection
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except ImportError:
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initialize_highlighter = None
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INITIALIZING, COLLECTED, DIFFED = range(3)
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def generate_diff(collection, context):
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d = Differ()
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for path, item_type, changed_path in collection:
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if item_type == 'diff':
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is_binary = isinstance(data_for_path(path), bytes)
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if not is_binary:
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d.add_diff(path, changed_path)
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return d(context)
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class DiffHandler(Handler):
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image_manager_class = ImageManager
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def __init__(self, args, opts, left, right):
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self.state = INITIALIZING
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self.opts = opts
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self.left, self.right = left, right
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self.report_traceback_on_exit = None
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self.args = args
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self.scroll_pos = self.max_scroll_pos = 0
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self.current_context_count = self.original_context_count = self.args.context
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if self.current_context_count < 0:
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self.current_context_count = self.original_context_count = self.opts.num_context_lines
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self.highlighting_done = False
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self.restore_position = None
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for key_def, action in self.opts.key_definitions.items():
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self.add_shortcut(action, *key_def)
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def perform_action(self, action):
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func, args = action
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if func == 'quit':
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self.quit_loop(0)
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return
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if self.state <= DIFFED:
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if func == 'scroll_by':
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return self.scroll_lines(*args)
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if func == 'scroll_to':
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where = args[0]
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if 'change' in where:
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return self.scroll_to_next_change(backwards='prev' in where)
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if 'page' in where:
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amt = self.num_lines * (1 if 'next' in where else -1)
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else:
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amt = len(self.diff_lines) * (1 if 'end' in where else -1)
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return self.scroll_lines(amt)
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if func == 'change_context':
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new_ctx = self.current_context_count
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to = args[0]
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if to == 'all':
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new_ctx = 100000
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elif to == 'default':
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new_ctx = self.original_context_count
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else:
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new_ctx += to
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return self.change_context_count(new_ctx)
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def create_collection(self):
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self.start_job('collect', create_collection, self.left, self.right)
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def generate_diff(self):
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self.start_job('diff', generate_diff, self.collection, self.current_context_count)
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def calculate_statistics(self):
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self.added_count = self.collection.added_count
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self.removed_count = self.collection.removed_count
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for patch in self.diff_map.values():
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self.added_count += patch.added_count
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self.removed_count += patch.removed_count
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def render_diff(self):
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self.diff_lines = tuple(render_diff(self.collection, self.diff_map, self.args, self.screen_size.cols, self.image_manager))
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self.ref_path_map = defaultdict(list)
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for i, l in enumerate(self.diff_lines):
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self.ref_path_map[l.ref.path].append((i, l.ref))
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self.max_scroll_pos = len(self.diff_lines) - self.num_lines
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@property
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def current_position(self):
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return self.diff_lines[min(len(self.diff_lines) - 1, self.scroll_pos)].ref
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@current_position.setter
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def current_position(self, ref):
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num = None
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if isinstance(ref.extra, LineRef):
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sln = ref.extra.src_line_number
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for i, q in self.ref_path_map[ref.path]:
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if isinstance(q.extra, LineRef):
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if q.extra.src_line_number >= sln:
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if q.extra.src_line_number == sln:
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num = i
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break
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num = i
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if num is None:
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for i, q in self.ref_path_map[ref.path]:
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num = i
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break
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if num is not None:
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self.scroll_pos = min(num, self.max_scroll_pos)
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@property
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def num_lines(self):
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return self.screen_size.rows - 1
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def scroll_to_next_change(self, backwards=False):
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if backwards:
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r = range(self.scroll_pos - 1, -1, -1)
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else:
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r = range(self.scroll_pos + 1, len(self.diff_lines))
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for i in r:
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line = self.diff_lines[i]
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if line.is_change_start:
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self.scroll_lines(i - self.scroll_pos)
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return
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self.cmd.bell()
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def set_scrolling_region(self):
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self.cmd.set_scrolling_region(self.screen_size, 0, self.num_lines - 2)
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def scroll_lines(self, amt=1):
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new_pos = max(0, min(self.scroll_pos + amt, self.max_scroll_pos))
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if new_pos == self.scroll_pos:
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self.cmd.bell()
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return
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if abs(new_pos - self.scroll_pos) >= self.num_lines - 1:
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self.scroll_pos = new_pos
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self.draw_screen()
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return
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self.enforce_cursor_state()
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self.cmd.scroll_screen(amt)
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self.scroll_pos = new_pos
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if amt < 0:
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self.cmd.set_cursor_position(0, 0)
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self.draw_lines(-amt)
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else:
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self.cmd.set_cursor_position(0, self.num_lines - amt)
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self.draw_lines(amt, self.num_lines - amt)
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self.draw_status_line()
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def init_terminal_state(self):
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self.cmd.set_line_wrapping(False)
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self.cmd.set_window_title(main.title)
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self.cmd.set_default_colors(self.opts.foreground, self.opts.background)
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def initialize(self):
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self.init_terminal_state()
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self.set_scrolling_region()
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self.draw_screen()
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self.create_collection()
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def enforce_cursor_state(self):
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self.cmd.set_cursor_visible(self.state > DIFFED)
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def finalize(self):
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self.cmd.set_cursor_visible(True)
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self.cmd.set_default_colors()
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self.cmd.set_scrolling_region()
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def draw_lines(self, num, offset=0):
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offset += self.scroll_pos
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image_involved = False
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limit = len(self.diff_lines)
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for i in range(num):
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lpos = offset + i
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if lpos >= limit:
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text = ''
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else:
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line = self.diff_lines[lpos]
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text = line.text
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if line.image_data is not None:
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image_involved = True
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self.write('\r\x1b[K' + text + '\x1b[0m')
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if i < num - 1:
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self.write('\n')
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if image_involved:
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self.place_images()
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def place_images(self):
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self.cmd.clear_images_on_screen()
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offset = self.scroll_pos
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limit = len(self.diff_lines)
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in_image = False
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for row in range(self.num_lines):
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lpos = offset + row
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if lpos >= limit:
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break
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line = self.diff_lines[lpos]
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if in_image:
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if line.image_data is None:
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in_image = False
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continue
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if line.image_data is not None:
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left_placement, right_placement = line.image_data
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if left_placement is not None:
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self.place_image(row, left_placement, True)
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in_image = True
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if right_placement is not None:
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self.place_image(row, right_placement, False)
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in_image = True
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def place_image(self, row, placement, is_left):
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xpos = (0 if is_left else (self.screen_size.cols // 2)) + placement.image.margin_size
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image_height_in_rows = placement.image.rows
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topmost_visible_row = placement.row
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num_visible_rows = image_height_in_rows - topmost_visible_row
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visible_frac = min(num_visible_rows / image_height_in_rows, 1)
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if visible_frac > 0:
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height = int(visible_frac * placement.image.height)
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top = placement.image.height - height
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self.image_manager.show_image(placement.image.image_id, xpos, row, src_rect=(
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0, top, placement.image.width, height))
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def draw_screen(self):
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self.enforce_cursor_state()
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if self.state < DIFFED:
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self.cmd.clear_screen()
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self.write(_('Calculating diff, please wait...'))
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return
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self.cmd.clear_images_on_screen()
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self.cmd.set_cursor_position(0, 0)
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self.draw_lines(self.num_lines)
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self.draw_status_line()
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def draw_status_line(self):
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if self.state < DIFFED:
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return
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self.cmd.set_cursor_position(0, self.num_lines)
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self.cmd.clear_to_eol()
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scroll_frac = styled('{:.0%}'.format(self.scroll_pos / (self.max_scroll_pos or 1)), fg=self.opts.margin_fg)
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counts = '{}{}{}'.format(
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styled(str(self.added_count), fg=self.opts.highlight_added_bg),
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styled(',', fg=self.opts.margin_fg),
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styled(str(self.removed_count), fg=self.opts.highlight_removed_bg)
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)
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suffix = counts + ' ' + scroll_frac
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prefix = styled(':', fg=self.opts.margin_fg)
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filler = self.screen_size.cols - wcswidth(prefix) - wcswidth(suffix)
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text = '{}{}{}'.format(prefix, ' ' * filler, suffix)
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self.write(text)
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def change_context_count(self, new_ctx):
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new_ctx = max(0, new_ctx)
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if new_ctx != self.current_context_count:
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self.current_context_count = new_ctx
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self.state = COLLECTED
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self.generate_diff()
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self.restore_position = self.current_position
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self.draw_screen()
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def on_text(self, text, in_bracketed_paste=False):
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action = self.shortcut_action(text)
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if action is not None:
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return self.perform_action(action)
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def on_key(self, key_event):
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if key_event.type is RELEASE:
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return
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action = self.shortcut_action(key_event)
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if action is not None:
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return self.perform_action(action)
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def on_resize(self, screen_size):
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self.screen_size = screen_size
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self.set_scrolling_region()
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if self.state > COLLECTED:
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self.image_manager.delete_all_sent_images()
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self.render_diff()
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self.draw_screen()
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def on_job_done(self, job_id, job_result):
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if 'tb' in job_result:
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self.report_traceback_on_exit = job_result['tb']
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self.quit_loop(1)
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return
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if job_id == 'collect':
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self.collection = job_result['result']
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self.state = COLLECTED
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self.generate_diff()
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elif job_id == 'diff':
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diff_map = job_result['result']
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if isinstance(diff_map, str):
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self.report_traceback_on_exit = diff_map
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self.quit_loop(1)
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return
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self.state = DIFFED
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self.diff_map = diff_map
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self.calculate_statistics()
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self.render_diff()
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self.scroll_pos = 0
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if self.restore_position is not None:
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self.current_position = self.restore_position
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self.restore_position = None
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self.draw_screen()
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if initialize_highlighter is not None and not self.highlighting_done:
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from .highlight import StyleNotFound
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self.highlighting_done = True
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try:
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initialize_highlighter(self.opts.pygments_style)
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except StyleNotFound as e:
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self.report_traceback_on_exit = str(e)
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self.quit_loop(1)
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return
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self.start_job('highlight', highlight_collection, self.collection, self.opts.syntax_aliases)
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elif job_id == 'highlight':
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hdata = job_result['result']
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if isinstance(hdata, str):
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self.report_traceback_on_exit = diff_map
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self.quit_loop(1)
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return
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set_highlight_data(hdata)
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self.render_diff()
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self.draw_screen()
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def on_interrupt(self):
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self.quit_loop(1)
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def on_eot(self):
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self.quit_loop(1)
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OPTIONS = partial('''\
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--context
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type=int
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default=-1
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Number of lines of context to show between changes. Negative values
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use the number set in diff.conf
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--config
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type=list
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{config_help}
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--override -o
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type=list
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Override individual configuration options, can be specified multiple times.
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Syntax: :italic:`name=value`. For example: :italic:`-o background=gray`
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'''.format, config_help=CONFIG_HELP.format(conf_name='diff', appname=appname))
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def showwarning(message, category, filename, lineno, file=None, line=None):
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if category is ImageSupportWarning:
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showwarning.warnings.append(message)
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showwarning.warnings = []
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help_text = 'Show a side-by-side diff of the specified files/directories'
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usage = 'file_or_directory_left file_or_directory_right'
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def main(args):
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warnings.showwarning = showwarning
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args, items = parse_args(args[1:], OPTIONS, usage, help_text, 'kitty +kitten diff')
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if len(items) != 2:
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raise SystemExit('You must specify exactly two files/directories to compare')
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left, right = items
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main.title = _('{} vs. {}').format(left, right)
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if os.path.isdir(left) != os.path.isdir(right):
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raise SystemExit('The items to be diffed should both be either directories or files. Comparing a directory to a file is not valid.')
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opts = init_config(args)
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set_diff_command(opts.diff_cmd)
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lines_for_path.replace_tab_by = opts.replace_tab_by
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# Ensure the kitten works even when stdin/stdout are redirected
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if not sys.stdin.isatty():
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sys.stdin = open('/dev/tty')
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if not sys.stdout.isatty():
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sys.stdout = open('/dev/tty', 'w')
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loop = Loop()
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handler = DiffHandler(args, opts, left, right)
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loop.loop(handler)
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for message in showwarning.warnings:
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from kitty.utils import safe_print
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safe_print(message, file=sys.stderr)
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if loop.return_code != 0:
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if handler.report_traceback_on_exit:
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print(handler.report_traceback_on_exit, file=sys.stderr)
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input('Press Enter to quit.')
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raise SystemExit(loop.return_code)
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if __name__ == '__main__':
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main(sys.argv)
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elif __name__ == '__doc__':
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sys.cli_docs['usage'] = usage
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sys.cli_docs['options'] = OPTIONS
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sys.cli_docs['help_text'] = help_text
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elif __name__ == '__conf__':
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from .config import all_options
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sys.all_options = all_options
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