| 1 | #
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| 2 | # Copyright (c) 2009 Martin Decky
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| 3 | # All rights reserved.
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| 4 | #
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| 5 | # Redistribution and use in source and binary forms, with or without
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| 6 | # modification, are permitted provided that the following conditions
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| 7 | # are met:
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| 8 | #
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| 9 | # - Redistributions of source code must retain the above copyright
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| 10 | # notice, this list of conditions and the following disclaimer.
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| 11 | # - Redistributions in binary form must reproduce the above copyright
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| 12 | # notice, this list of conditions and the following disclaimer in the
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| 13 | # documentation and/or other materials provided with the distribution.
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| 14 | # - The name of the author may not be used to endorse or promote products
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| 15 | # derived from this software without specific prior written permission.
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| 16 | #
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| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | #
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| 28 | """
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| 29 | Text User Interface wrapper
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| 30 | """
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| 31 |
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| 32 | import sys
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| 33 | import os
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| 34 |
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| 35 | def call_dlg(dlgcmd, *args, **kw):
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| 36 | "Wrapper for calling 'dialog' program"
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| 37 |
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| 38 | indesc, outdesc = os.pipe()
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| 39 | pid = os.fork()
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| 40 | if (not pid):
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| 41 | os.close(2)
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| 42 | os.dup(outdesc)
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| 43 | os.close(indesc)
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| 44 |
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| 45 | dlgargs = [dlgcmd]
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| 46 | for key, val in kw.items():
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| 47 | dlgargs.append('--' + key)
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| 48 | dlgargs.append(val)
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| 49 |
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| 50 | dlgargs += args
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| 51 | os.execlp(dlgcmd, *dlgargs)
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| 52 |
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| 53 | os.close(outdesc)
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| 54 |
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| 55 | try:
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| 56 | errout = os.fdopen(indesc, 'r')
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| 57 | data = errout.read()
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| 58 | errout.close()
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| 59 | pid, status = os.wait()
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| 60 | except:
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| 61 | # Reset terminal
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| 62 | os.system('reset')
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| 63 | raise
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| 64 |
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| 65 | if (not os.WIFEXITED(status)):
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| 66 | # Reset terminal
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| 67 | os.system('reset')
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| 68 | raise EOFError
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| 69 |
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| 70 | status = os.WEXITSTATUS(status)
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| 71 | if (status == 255):
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| 72 | raise EOFError
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| 73 |
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| 74 | return (status, data)
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| 75 |
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| 76 | try:
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| 77 | import snack
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| 78 | newt = True
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| 79 | dialog = False
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| 80 | except ImportError:
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| 81 | newt = False
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| 82 |
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| 83 | dlgcmd = os.environ.get('DIALOG', 'dialog')
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| 84 | if (call_dlg(dlgcmd, '--print-maxsize')[0] != 0):
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| 85 | dialog = False
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| 86 | else:
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| 87 | dialog = True
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| 88 |
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| 89 | width_extra = 13
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| 90 | height_extra = 11
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| 91 |
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| 92 | def width_fix(screen, width):
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| 93 | "Correct width to screen size"
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| 94 |
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| 95 | if (width + width_extra > screen.width):
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| 96 | width = screen.width - width_extra
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| 97 |
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| 98 | if (width <= 0):
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| 99 | width = screen.width
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| 100 |
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| 101 | return width
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| 102 |
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| 103 | def height_fix(screen, height):
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| 104 | "Correct height to screen size"
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| 105 |
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| 106 | if (height + height_extra > screen.height):
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| 107 | height = screen.height - height_extra
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| 108 |
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| 109 | if (height <= 0):
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| 110 | height = screen.height
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| 111 |
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| 112 | return height
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| 113 |
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| 114 | def screen_init():
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| 115 | "Initialize the screen"
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| 116 |
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| 117 | if (newt):
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| 118 | return snack.SnackScreen()
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| 119 |
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| 120 | return None
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| 121 |
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| 122 | def screen_done(screen):
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| 123 | "Cleanup the screen"
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| 124 |
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| 125 | if (newt):
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| 126 | screen.finish()
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| 127 |
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| 128 | def choice_window(screen, title, text, options, position):
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| 129 | "Create options menu"
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| 130 |
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| 131 | maxopt = 0
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| 132 | for option in options:
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| 133 | length = len(option)
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| 134 | if (length > maxopt):
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| 135 | maxopt = length
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| 136 |
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| 137 | width = maxopt
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| 138 | height = len(options)
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| 139 |
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| 140 | if (newt):
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| 141 | width = width_fix(screen, width + width_extra)
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| 142 | height = height_fix(screen, height)
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| 143 |
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| 144 | if (height > 3):
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| 145 | large = True
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| 146 | else:
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| 147 | large = False
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| 148 |
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| 149 | buttonbar = snack.ButtonBar(screen, ('Done', 'Cancel'))
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| 150 | textbox = snack.TextboxReflowed(width, text)
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| 151 | listbox = snack.Listbox(height, scroll = large, returnExit = 1)
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| 152 |
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| 153 | cnt = 0
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| 154 | for option in options:
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| 155 | listbox.append(option, cnt)
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| 156 | cnt += 1
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| 157 |
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| 158 | if (position != None):
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| 159 | listbox.setCurrent(position)
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| 160 |
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| 161 | grid = snack.GridForm(screen, title, 1, 3)
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| 162 | grid.add(textbox, 0, 0)
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| 163 | grid.add(listbox, 0, 1, padding = (0, 1, 0, 1))
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| 164 | grid.add(buttonbar, 0, 2, growx = 1)
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| 165 |
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| 166 | retval = grid.runOnce()
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| 167 |
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| 168 | return (buttonbar.buttonPressed(retval), listbox.current())
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| 169 | elif (dialog):
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| 170 | if (width < 35):
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| 171 | width = 35
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| 172 |
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| 173 | args = []
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| 174 | cnt = 0
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| 175 | for option in options:
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| 176 | args.append(str(cnt + 1))
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| 177 | args.append(option)
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| 178 |
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| 179 | cnt += 1
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| 180 |
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| 181 | kw = {}
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| 182 | if (position != None):
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| 183 | kw['default-item'] = str(position + 1)
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| 184 |
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| 185 | status, data = call_dlg(dlgcmd, '--title', title, '--extra-button', '--extra-label', 'Done', '--menu', text, str(height + height_extra), str(width + width_extra), str(cnt), *args, **kw)
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| 186 |
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| 187 | if (status == 1):
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| 188 | return ('cancel', None)
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| 189 |
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| 190 | try:
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| 191 | choice = int(data) - 1
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| 192 | except ValueError:
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| 193 | return ('cancel', None)
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| 194 |
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| 195 | if (status == 0):
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| 196 | return (None, choice)
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| 197 |
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| 198 | return ('done', choice)
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| 199 |
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| 200 | sys.stdout.write("\n *** %s *** \n%s\n\n" % (title, text))
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| 201 |
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| 202 | maxcnt = len(str(len(options)))
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| 203 | cnt = 0
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| 204 | for option in options:
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| 205 | sys.stdout.write("%*s. %s\n" % (maxcnt, cnt + 1, option))
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| 206 | cnt += 1
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| 207 |
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| 208 | sys.stdout.write("\n%*s. Done\n" % (maxcnt, '0'))
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| 209 | sys.stdout.write("%*s. Quit\n\n" % (maxcnt, 'q'))
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| 210 |
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| 211 | while True:
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| 212 | if (position != None):
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| 213 | sys.stdout.write("Selection[%s]: " % str(position + 1))
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| 214 | else:
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| 215 | if (cnt > 0):
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| 216 | sys.stdout.write("Selection[1]: ")
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| 217 | else:
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| 218 | sys.stdout.write("Selection[0]: ")
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| 219 | inp = sys.stdin.readline()
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| 220 |
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| 221 | if (not inp):
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| 222 | raise EOFError
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| 223 |
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| 224 | if (not inp.strip()):
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| 225 | if (position != None):
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| 226 | return (None, position)
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| 227 | else:
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| 228 | if (cnt > 0):
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| 229 | inp = '1'
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| 230 | else:
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| 231 | inp = '0'
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| 232 |
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| 233 | if (inp.strip() == 'q'):
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| 234 | return ('cancel', None)
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| 235 |
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| 236 | try:
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| 237 | choice = int(inp.strip())
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| 238 | except ValueError:
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| 239 | continue
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| 240 |
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| 241 | if (choice == 0):
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| 242 | return ('done', 0)
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| 243 |
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| 244 | if (choice < 1) or (choice > len(options)):
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| 245 | continue
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| 246 |
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| 247 | return (None, choice - 1)
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| 248 |
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| 249 | def error_dialog(screen, title, msg):
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| 250 | "Print error dialog"
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| 251 |
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| 252 | width = len(msg)
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| 253 |
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| 254 | if (newt):
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| 255 | width = width_fix(screen, width)
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| 256 |
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| 257 | buttonbar = snack.ButtonBar(screen, ['Ok'])
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| 258 | textbox = snack.TextboxReflowed(width, msg)
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| 259 |
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| 260 | grid = snack.GridForm(screen, title, 1, 2)
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| 261 | grid.add(textbox, 0, 0, padding = (0, 0, 0, 1))
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| 262 | grid.add(buttonbar, 0, 1, growx = 1)
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| 263 | grid.runOnce()
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| 264 | elif (dialog):
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| 265 | call_dlg(dlgcmd, '--title', title, '--msgbox', msg, '6', str(width + width_extra))
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| 266 | else:
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| 267 | sys.stdout.write("\n%s: %s\n" % (title, msg))
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