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# tests for 'scenario' in previous layer

scenario first_scenario_in_mu [
  run [
    10:num <- add 2, 2
  ]
  memory-should-contain [
    10 <- 4
  ]
]

scenario scenario_with_comment_in_mu [
  run [
    # comment
    10:num <- add 2, 2
  ]
  memory-should-contain [
    10 <- 4
  ]
]

scenario scenario_with_multiple_comments_in_mu [
  run [
    # comment1
    # comment2
    10:num <- add 2, 2
  ]
  memory-should-contain [
    10 <- 4
  ]
]

scenario check_text_in_memory [
  run [
    10:num <- copy 3
    11:char <- copy 97  # 'a'
    12:char <- copy 98  # 'b'
    13:char <- copy 99  # 'c'
  ]
  memory-should-contain [
    10:array:character <- [abc]
  ]
]

scenario check_trace [
  run [
    10:num <- add 2, 2
  ]
  trace-should-contain [
    mem: storing 4 in location 10
  ]
]

scenario check_trace_negative [
  run [
    10:num <- add 2, 2
  ]
  trace-should-not-contain [
    mem: storing 3 in location 10
  ]
]

scenario check_trace_instruction [
  run [
    trace 1, [foo], [aaa]
  ]
  trace-should-contain [
    foo: aaa
  ]
]
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# This file is part of ranger, the console file manager.
# License: GNU GPL version 3, see the file "AUTHORS" for details.

import os
import sys
import curses
import _curses
import threading

from .displayable import DisplayableContainer
from .mouse_event import MouseEvent
from ranger.ext.keybinding_parser import KeyBuffer, KeyMaps, ALT_KEY

MOUSEMASK = curses.ALL_MOUSE_EVENTS | curses.REPORT_MOUSE_POSITION

_ASCII = ''.join(chr(c) for c in range(32, 127))
def ascii_only(string):
    return ''.join(c if c in _ASCII else '?' for c in string)

def _setup_mouse(signal):
    if signal['value']:
        curses.mousemask(MOUSEMASK)
        curses.mouseinterval(0)

        ## this line solves this problem:
        ## If a mouse click triggers an action that disables curses and
        ## starts curses again, (e.g. running a ## file by clicking on its
        ## preview) and the next key is another mouse click, the bstate of this
        ## mouse event will be invalid.  (atm, invalid bstates are recognized
        ## as scroll-down, so this avoids an errorneous scroll-down action)
        curses.ungetmouse(0,0,0,0,0)
    else:
        curses.mousemask(0)

class UI(DisplayableContainer):
    is_set_up = False
    load_mode = False
    is_on = False
    termsize = None

    def __init__(self, env=None, fm=None):
        self.keybuffer = KeyBuffer()
        self.keymaps = KeyMaps(self.keybuffer)
        self.redrawlock = threading.Event()
        self.redrawlock.set()

        if fm is not None:
            self.fm = fm

    def setup_curses(self):
        os.environ['ESCDELAY'] = '25'   # don't know a cleaner way
        try:
            self.win = curses.initscr()
        except _curses.error as e:
            if e.args[0] == "setupterm: could not find terminal":
                os.environ['TERM'] = 'linux'
                self.win = curses.initscr()
        self.keymaps.use_keymap('browser')
        DisplayableContainer.__init__(self, None)

    def initialize(self):
        """initialize curses, then call setup (at the first time) and resize."""
        self.win.leaveok(0)
        self.win.keypad(1)
        self.load_mode = False

        curses.cbreak()
        curses.noecho()
        curses.halfdelay(20)
        try:
            curses.curs_set(int(bool(self.settings.show_cursor)))
        except:
            pass
        curses.start_color()
        try:
            curses.use_default_colors()
        except:
            pass

        self.settings.signal_bind('setopt.mouse_enabled', _setup_mouse)
        _setup_mouse(dict(value=self.settings.mouse_enabled))

        if not self.is_set_up:
            self.is_set_up = True
            self.setup()
            self.win.addstr("loading...")
            self.win.refresh()
            self._draw_title = curses.tigetflag('hs') # has_status_line
        self.update_size()
        self.is_on = True

        if self.settings.update_tmux_title:
            sys.stdout.write("\033kranger\033\\")
            sys.stdout.flush()

    def suspend(self):
        """Turn off curses"""
        self.win.keypad(0)
        curses.nocbreak()
        curses.echo()
        try:
            curses.curs_set(1)
        except:
            pass
        if self.settings.mouse_enabled:
            _setup_mouse(dict(value=False))
        curses.endwin()
        self.is_on = False

    def set_load_mode(self, boolean):
        boolean = bool(boolean)
        if boolean != self.load_mode:
            self.load_mode = boolean

            if boolean:
                # don't wait for key presses in the load mode
                curses.cbreak()
                self.win.nodelay(1)
            else:
                self.win.nodelay(0)
                # Sanitize halfdelay setting
                halfdelay = min(255, max(1, self.settings.idle_delay // 100))
                curses.halfdelay(halfdelay)

    def destroy(self):
        """Destroy all widgets and turn off curses"""
        DisplayableContainer.destroy(self)
        self.suspend()

    def handle_mouse(self):
        """Handles mouse input"""
        try:
            event = MouseEvent(curses.getmouse())
        except _curses.error:
            return
        if not self.console.visible:
            DisplayableContainer.click(self, event)

    def handle_key(self, key):
        """Handles key input"""

        if hasattr(self, 'hint'):
            self.hint()

        if key < 0:
            self.keybuffer.clear()

        elif not DisplayableContainer.press(self, key):
            self.keymaps.use_keymap('browser')
            self.press(key)

    def press(self, key):
        keybuffer = self.keybuffer
        self.status.clear_message()

        keybuffer.add(key)
        self.fm.hide_bookmarks()
        self.browser.draw_hints = not keybuffer.finished_parsing \
                and keybuffer.finished_parsing_quantifier

        if keybuffer.result is not None:
            try:
                self.fm.execute_console(keybuffer.result,
                        wildcards=keybuffer.wildcards,
                        quantifier=keybuffer.quantifier)
            finally:
                if keybuffer.finished_parsing:
                    keybuffer.clear()
        elif keybuffer.finished_parsing:
            keybuffer.clear()
            return False
        return True

    def handle_keys(self, *keys):
        for key in keys:
            self.handle_key(key)

    def handle_input(self):
        key = self.win.getch()
        if key is 27 or key >= 128 and key < 256:
            # Handle special keys like ALT+X or unicode here:
            keys = [key]
            previous_load_mode = self.load_mode
            self.set_load_mode(True)
            for n in range(4):
                getkey = self.win.getch()
                if getkey is not -1:
                    keys.append(getkey)
            if len(keys) == 1:
                keys.append(-1)
            elif keys[0] == 27:
                keys[0] = ALT_KEY
            if self.settings.xterm_alt_key:
                if len(keys) == 2 and keys[1] in range(127, 256):
                    if keys[0] == 195:
                        keys = [ALT_KEY, keys[1] - 64]
                    elif keys[0] == 194:
                        keys = [ALT_KEY, keys[1] - 128]
            self.handle_keys(*keys)
            self.set_load_mode(previous_load_mode)
            if self.settings.flushinput and not self.console.visible:
                curses.flushinp()
        else:
            # Handle simple key presses, CTRL+X, etc here:
            if key >= 0:
                if self.settings.flushinput and not self.console.visible:
                    curses.flushinp()
                if key == curses.KEY_MOUSE:
                    self.handle_mouse()
                elif key == curses.KEY_RESIZE:
                    self.update_size()
                else:
                    if not self.fm.input_is_blocked():
                        self.handle_key(key)

    def setup(self):
        """Build up the UI by initializing widgets."""
        from ranger.gui.widgets.browserview import BrowserView
        from ranger.gui.widgets.titlebar import TitleBar
        from ranger.gui.widgets.console import Console
        from ranger.gui.widgets.statusbar import StatusBar
        from ranger.gui.widgets.taskview import TaskView
        from ranger.gui.widgets.pager import Pager
        from ranger.ext.vcs import VcsThread

        # Create a title bar
        self.titlebar = TitleBar(self.win)
        self.add_child(self.titlebar)

        # Create the browser view
        self.browser = BrowserView(self.win, self.settings.column_ratios)
        self.settings.signal_bind('setopt.column_ratios',
                self.browser.change_ratios)
        self.add_child(self.browser)

        # Create the process manager
        self.taskview = TaskView(self.win)
        self.taskview.visible = False
        self.add_child(self.taskview)

        # Create the status bar
        self.status = StatusBar(self.win, self.browser.main_column)
        self.add_child(self.status)

        # Create the console
        self.console = Console(self.win)
        self.add_child(self.console)
        self.console.visible = False

        # Create the pager
        self.pager = Pager(self.win)
        self.pager.visible = False
        self.add_child(self.pager)

        # Create VCS thread
        self.vcsthread = VcsThread(self)
        self.vcsthread.start()

    def redraw(self):
        """Redraw all widgets"""
        self.redrawlock.wait()
        self.redrawlock.clear()
        self.poke()

        # determine which widgets are shown
        if self.console.wait_for_command_input or self.console.question_queue:
            self.console.focused = True
            self.console.visible = True
            self.status.visible = False
        else:
            self.console.focused = False
            self.console.visible = False
            self.status.visible = True

        self.draw()
        self.finalize()
        self.redrawlock.set()

    def redraw_window(self):
        """Redraw the window. This only calls self.win.redrawwin()."""
        self.win.erase()
        self.win.redrawwin()
        self.win.refresh()
        self.win.redrawwin()
        self.need_redraw = True

    def update_size(self):
        """resize all widgets"""
        self.termsize = self.win.getmaxyx()
        y, x = self.termsize

        self.browser.resize(self.settings.status_bar_on_top and 2 or 1, 0, y - 2, x)
        self.taskview.resize(1, 0, y - 2, x)
        self.pager.resize(1, 0, y - 2, x)
        self.titlebar.resize(0, 0, 1, x)
        self.status.resize(self.settings.status_bar_on_top and 1 or y-1, 0, 1, x)
        self.console.resize(y - 1, 0, 1, x)

    def draw(self):
        """Draw all objects in the container"""
        self.win.touchwin()
        DisplayableContainer.draw(self)
        if self._draw_title and self.settings.update_title:
            cwd = self.fm.thisdir.path
            if cwd.startswith(self.fm.home_path):
                cwd = '~' + cwd[len(self.fm.home_path):]
            if self.settings.shorten_title:
                split = cwd.rsplit(os.sep, self.settings.shorten_title)
                if os.sep in split[0]:
                    cwd = os.sep.join(split[1:])
            try:
                fixed_cwd = cwd.encode('utf-8', 'surrogateescape'). \
                        decode('utf-8', 'replace')
                sys.stdout.write("%sranger:%s%s" %
                        (curses.tigetstr('tsl').decode('latin-1'), fixed_cwd,
                         curses.tigetstr('fsl').decode('latin-1')))
                sys.stdout.flush()
            except:
                pass

        self.win.refresh()

    def finalize(self):
        """Finalize every object in container and refresh the window"""
        DisplayableContainer.finalize(self)
        self.win.refresh()

    def draw_images(self):
        if self.pager.visible:
            self.pager.draw_image()
        elif self.browser.pager.visible:
            self.browser.pager.draw_image()
        else:
            self.browser.columns[-1].draw_image()

    def close_pager(self):
        if self.console.visible:
            self.console.focused = True
        self.pager.close()
        self.pager.visible = False
        self.pager.focused = False
        self.browser.visible = True

    def open_pager(self):
        self.browser.columns[-1].clear_image(force=True)
        if self.console.focused:
            self.console.focused = False
        self.pager.open()
        self.pager.visible = True
        self.pager.focused = True
        self.browser.visible = False
        return self.pager

    def open_embedded_pager(self):
        self.browser.open_pager()
        for column in self.browser.columns:
            if column == self.browser.main_column:
                break
            column.level_shift(amount=1)
        return self.browser.pager

    def close_embedded_pager(self):
        self.browser.close_pager()
        for column in self.browser.columns:
            column.level_restore()

    def open_console(self, string='', prompt=None, position=None):
        if self.console.open(string, prompt=prompt, position=position):
            self.status.msg = None

    def close_console(self):
        self.console.close()
        self.close_pager()

    def open_taskview(self):
        self.browser.columns[-1].clear_image(force=True)
        self.pager.close()
        self.pager.visible = False
        self.pager.focused = False
        self.console.visible = False
        self.browser.visible = False
        self.taskview.visible = True
        self.taskview.focused = True

    def redraw_main_column(self):
        self.browser.main_column.need_redraw = True

    def close_taskview(self):
        self.taskview.visible = False
        self.browser.visible = True
        self.taskview.focused = False

    def throbber(self, string='.', remove=False):
        if remove:
            self.titlebar.throbber = type(self.titlebar).throbber
        else:
            self.titlebar.throbber = string

    def hint(self, text=None):
        self.status.hint = text

    def get_pager(self):
        if self.browser.pager.visible:
            return self.browser.pager
        else:
            return self.pager