# FILE:     autoload/conque_term/conque_screen.py {{{
# AUTHOR:   Nico Raffo <nicoraffo@gmail.com>
# WEBSITE:  http://conque.googlecode.com
# MODIFIED: 2010-11-15
# VERSION:  2.0, for Vim 7.0
# LICENSE:
# Conque - Vim terminal/console emulator
# Copyright (C) 2009-2010 Nico Raffo
#
# MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE. }}}

"""
ConqueScreen is an extention of the vim.current.buffer object

It restricts the working indices of the buffer object to the scroll region
which pty is expecting. It also uses 1-based indexes, to match escape
sequence commands.

  E.g.:
    s = ConqueScreen()
    ...
    s[5] = 'Set 5th line in terminal to this line'
    s.append('Add new line to terminal')
    s[5] = 'Since previous append() command scrolled the terminal down, this is a different line than first cb[5] call'
"""

import vim


class ConqueScreen(object):

    # CLASS PROPERTIES  {{{

    # the buffer
    buffer = None

    # screen and scrolling regions
    screen_top = 1

    # screen width
    screen_width = 80
    screen_height = 80

    # }}}

    def __init__(self): # {{{
        self.buffer = vim.current.buffer

        self.screen_top = 1
        self.screen_width = vim.current.window.width
        self.screen_height = vim.current.window.height
    # }}}

    ###############################################################################################
    # List overload {{{

    def __len__(self): # {{{
        return len(self.buffer)
    # }}}

    def __getitem__(self, key): # {{{
        real_line = self.get_real_idx(key)

        # if line is past buffer end, add lines to buffer
        if real_line >= len(self.buffer):
            for i in range(len(self.buffer), real_line + 1):
                self.append(' ' * self.screen_width)

        return u(self.buffer[real_line], 'utf-8')
    # }}}

    def __setitem__(self, key, value): # {{{
        real_line = self.get_real_idx(key)

        if CONQUE_PYTHON_VERSION == 2:
            val = value.encode('utf-8')
        else:
            # XXX / Vim's python3 interface doesn't accept bytes object
            val = str(value)

        # if line is past end of screen, append
        if real_line == len(self.buffer):
            self.buffer.append(val)
        else:
            self.buffer[real_line] = val
    # }}}

    def __delitem__(self, key): # {{{
        del self.buffer[self.screen_top + key - 2]
    # }}}

    def append(self, value): # {{{
        if len(self.buffer) > self.screen_top + self.screen_height - 1:
            self.buffer[len(self.buffer) - 1] = value
        else:
            self.buffer.append(value)

        if len(self.buffer) > self.screen_top + self.screen_height - 1:
            self.screen_top += 1
        if vim.current.buffer.number == self.buffer.number:
            vim.command('normal G')
    # }}}

    def insert(self, line, value): # {{{

        l = self.screen_top + line - 2
        self.buffer.append(value, l)

    # }}}
    # }}}

    ###############################################################################################
    # Util {{{

    def get_top(self): # {{{
        return self.screen_top
    # }}}

    def get_real_idx(self, line): # {{{
        return (self.screen_top + line - 2)
    # }}}

    def get_real_line(self, line): # {{{
        return (self.screen_top + line - 1)
    # }}}

    def set_screen_width(self, width): # {{{
        self.screen_width = width
    # }}}

    # }}}

    ###############################################################################################
    def clear(self): # {{{
        self.buffer.append(' ')
        vim.command('normal Gzt')
        self.screen_top = len(self.buffer)
    # }}}

    def set_cursor(self, line, column): # {{{
        # figure out line
        real_line = self.screen_top + line - 1
        if real_line > len(self.buffer):
            for l in range(len(self.buffer) - 1, real_line):
                self.buffer.append('')

        # figure out column
        real_column = column
        if len(self.buffer[real_line - 1]) < real_column:
            self.buffer[real_line - 1] = self.buffer[real_line - 1] + ' ' * (real_column - len(self.buffer[real_line - 1]))

        # python version is occasionally grumpy
        try:
            vim.current.window.cursor = (real_line, real_column - 1)
        except:
            vim.command('call cursor(' + str(real_line) + ', ' + str(real_column) + ')')
    # }}}

    def reset_size(self, line): # {{{




        # save cursor line number
        real_line = self.screen_top + line

        # reset screen size
        self.screen_width = vim.current.window.width
        self.screen_height = vim.current.window.height
        self.screen_top = len(self.buffer) - vim.current.window.height + 1
        if self.screen_top < 1:
            self.screen_top = 1


        # align bottom of buffer to bottom of screen
        vim.command('normal ' + str(self.screen_height) + 'kG')

        # return new relative line number
        return (real_line - self.screen_top)
    # }}}

    def scroll_to_bottom(self): # {{{
        vim.current.window.cursor = (len(self.buffer) - 1, 1)
    # }}}

    def align(self): # {{{
        # align bottom of buffer to bottom of screen
        vim.command('normal ' + str(self.screen_height) + 'kG')
    # }}}

# vim:foldmethod=marker