#!/bin/sh
#
# casper-a11y-enable - Sets accessibility profile settings for the live session
#                      or installed system.
#
# This script is called by several other scripts, as well as ubiquity itself to
# set up accessibility profile settings for use in the live environment and on
# an installed system.
#
# Copyright (C) 2011, Canonical Ltd.
#
# Author:
# - Luke Yelavich <luke.yelavich@canonical.com>
#
# This script 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 2 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 application; if not, write to the Free Software Foundation, Inc., 51
# Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
##################################################################################

set -e

### PROFILE SETTINGS METHODS BEGIN HERE ###
# The methods that are used to set profile data have been placed as close to the
# top of this file as possible, so they are easy to locate, and will hopefully
# save time when making smaller changes.

# Common settings for low vision profiles. Any change you make here will affect
# all low vision profiles, for both the user session and login manager.
set_common_lowvis()
{
	gset set com.canonical.indicator.datetime show-calendar false
	gset set org.gnome.desktop.interface toolkit-accessibility true
	gct -s -t bool /desktop/gnome/interface/accessibility true
	gct -s -t bool /apps/gksu/disable-grab true
	gset set org.gnome.yelp show-cursor true
}

# Common settings for motor profiles. Any change you make here will affect
# all motor profiles, for both the user session and login manager.
set_common_motor()
{
	gset set org.gnome.desktop.a11y.keyboard enable true
	gct -s -t bool /apps/gksu/disable-grab true
	gset set org.gnome.desktop.a11y.keyboard stickykeys-enable true
	gset set org.gnome.desktop.a11y.keyboard stickykeys-two-key-off false
}

# Settings for the high-contrast profile.
set_high_contrast()
{
	gset set org.gnome.desktop.interface icon-theme HighContrast
	gset set org.gnome.desktop.interface monospace-font-name "monospace 18"
	gset set org.gnome.desktop.interface font-name "sans 18"
	gset set org.gnome.desktop.background picture-uri ""
	gset set org.gnome.desktop.background picture-options none
	gset set org.gnome.desktop.background primary-color \#666666
	gset set org.gnome.desktop.background secondary-color \#7F7F7F
	gset set org.gnome.desktop.background color-shading-type solid
	gset set org.gnome.desktop.interface cursor-size 48
	gset set org.gnome.desktop.interface cursor-theme whiteglass
	kderc_addtoprefixes /usr/share/kubuntu-default-settings/kde-profile/lesser-visual-impairment/
	if [ -d $CHROOT_DIR/usr/share/xubuntu-default-settings/accessibility ]; then
		cp -a $CHROOT_DIR/usr/share/xubuntu-default-settings/accessibility/* $CHROOT_DIR/etc/xdg/
	fi

	if [ -n "$SET_LOGIN" ]; then
		gset_lightdm set com.canonical.unity-greeter high-contrast true
	fi
}

set_magnifier()
{
	# Ubuntu
	gset set org.gnome.desktop.a11y.applications screen-magnifier-enabled true
	set_orca_config magnifier

	# Kubuntu
	kderc_addtoprefixes /usr/share/kubuntu-default-settings/kde-profile/lesser-visual-impairment/,/usr/share/kubuntu-default-settings/kde-profile/moderate-visual-impairment/
}

set_blindness()
{
	gset set org.gnome.desktop.a11y.applications screen-reader-enabled true
	gset set org.gnome.Empathy.conversation theme classic
	set_orca_config speech
	set_session ubuntu-2d

	if [ -n "$SET_LOGIN" ]; then
		gset_lightdm set com.canonical.unity-greeter screen-reader true
	fi
}

set_braille()
{
	gset set org.gnome.desktop.a11y.applications screen-reader-enabled true
	gset set org.gnome.Empathy.conversation theme classic
	set_orca_config braille
	set_session ubuntu-2d

	if [ -n "$SET_LOGIN" ]; then
		gset_lightdm set com.canonical.unity-greeter screen-reader true
	fi
}

set_keyboard_modifiers()
{
	gset set org.gnome.desktop.a11y.keyboard mousekeys-enable true
	gset set org.gnome.desktop.a11y.keyboard stickykeys-modifier-beep true
	gset set org.gnome.settings-daemon.peripherals.keyboard repeat true
	gset set org.gnome.settings-daemon.peripherals.keyboard delay 700
	gset set org.gnome.settings-daemon.peripherals.keyboard repeat-interval 10
	kderc_addtoprefixes /usr/share/kubuntu-default-settings/kde-profile/minor-motor-difficulties/
	if [ -e $CHROOT_DIR/etc/xdg/xfce4/mcs_settings/keyboard.xml ]; then
		sed -i 's/0/1/' $CHROOT_DIR/etc/xdg/xfce4/mcs_settings/keyboard.xml
	fi
}

set_onscreen_keyboard()
{
	gset set org.gnome.desktop.interface toolkit-accessibility true
	gset set org.gnome.desktop.a11y.keyboard stickykeys-modifier-beep false
	gset set org.gnome.desktop.a11y.applications screen-keyboard-enabled true

	if [ -n "$SET_LOGIN" ]; then
		gset_lightdm set com.canonical.unity-greeter onscreen-keyboard true
	fi

	kderc_addtoprefixes /usr/share/kubuntu-default-settings/kde-profile/minor-motor-difficulties/,/usr/share/kubuntu-default-settings/kde-profile/motor-difficulties-pointing-devices/
	if [ -e $CHROOT_DIR/etc/xdg/xfce4/mcs_settings/keyboard.xml ]; then
		sed -i '/Sticky/ s/0/1/' $CHROOT_DIR/etc/xdg/xfce4/mcs_settings/keyboard.xml
	fi
}
### PROFILE SETTINGS METHODS END HERE ###

help()
{
	cat <<EOF
Usage: $0 		[-chroot=<root>] [-user=<username>] [-l|-login]
			[-i|-initramfs] [-d|-debug] <profilename>

-h, -help		Display this help.
-chroot=<root>		Chroot into <root> to apply profile settings, requires a
			username to be specified, see below.
-user=<username>	The user where a profile is to be applied, requires the
			script to be run as root. If no username is given, it
			is assumed that you wish to apply profile settings for
			the current user.
-l, -login		Apply some of the selected profile settings to the
			login manager. Currently this is hard-coded to lightdm.
			This requires root privileges.
-i, -initramfs		Indicate that the script is being called from the
			initramfs. Allows the script to assume some values
			that can not otherwise be easily determined in an
			initramfs environment. Requires that a chroot dir and
			user name are specified. See above.
-script			Create a script to be run at system boot that will
			apply all settings for the specified user and for
			login. This script will then remove itself. This is
			needed to work around gsettings not working in a chroot
			environment with no dconf service running.
-d|-debug		Enable debugging output.
<profilename>		The name of the profile you wish to apply, see below.

The profiles currently available are as follows:
high-contrast	For users with lesser visual impairments who only need a high
		contrast theme, mouse cursor and icons.
magnifier	For users with moderate visual impairments who require a screen
		magnifier.
blindness	Users who are partially or completely blind who require a screen
		reader.
braille		Users who are partially or completely blind who require a screen
		reader and wish to use a Braille display.
keyboard-modifiers
		Users who have minor motor impairments who require slight
		changes to the way their keyboard behaves.
onscreen-keyboard
		Users with motor impairments who require the use of an
		on-screen keyboard.
EOF
}

gset()
{
	if [ -n "$GLIBBIN_VERSION" ]; then
		if [ -n "$STARTUP_SCRIPT" ]; then
			echo "gsettings " "$@" >> $CHROOT_DIR/usr/bin/a11y-profile-settings
		else
			$DO_CHROOT $DO_SUDO gsettings "$@"
		fi
	fi
}

gset_lightdm()
{
	if [ -n "$GLIBBIN_VERSION" ]; then
		if [ -n "$STARTUP_SCRIPT" ]; then
			echo "gsettings " "$@" >> $CHROOT_DIR/usr/bin/a11y-profile-settings-lightdm
		else
			$DO_CHROOT sudo -u lightdm gsettings "$@"
		fi
	fi
}

# Soon to be deprecated
gct()
{
	if [ -n "$GCONF_VERSION" ]; then
		if [ -n "$STARTUP_SCRIPT" ]; then
			echo "gconftool-2 " "$@" >> $CHROOT_DIR/usr/bin/a11y-profile-settings
		else
			$DO_CHROOT $DO_SUDO gconftool-2 "$@"
		fi
	fi
}

kderc_addtoprefixes()
{
	if [ -e $CHROOT_DIR/etc/kde4rc ]; then
		sed -i "s|\\(prefixes=/usr/share/kubuntu-default-settings/kde-profile/default/\\)|\\1,$1|" $CHROOT_DIR/etc/kde4rc
	fi
}

# Unfortunately this bloats this script somewhat, but orca doesn't seem to want
# to deal with individual settings/a small config fragment.
# Arguments: $1 = speech/magnifier/braille (which
# accessibility feature to turn on)
set_orca_config()
{
	# Yes, we could use $HOME, but enquiring about $HOME is not easy when
	# Outside the target environment, particularly when running from the
	# initramfs, and this script is not everything for everybody anyway.
	if [ -n "$ORCA_VERSION" ] && ! [ -f "$CHROOT_DIR/home/$USER_NAME/.local/share/orca/user-settings.conf" ]; then
		mkdir -p "$CHROOT_DIR/home/$USER_NAME/.local/share/orca"

		cat <<EOF > "$CHROOT_DIR/home/$USER_NAME/.local/share/orca/user-settings.conf"
{
    "pronunciations": {}, 
    "keybindings": {}, 
    "profiles": {
        "default": {
            "profile": [
                "Default", 
                "default"
            ], 
            "pronunciations": {}, 
            "keybindings": {}
        }
    }, 
    "general": {
        "speakCellHeaders": true, 
        "magEdgeMargin": 0, 
        "brailleContractionTable": "", 
        "magPointerFollowsFocus": false, 
        "magTextTrackingMode": 2, 
        "magZoomerBorderSize": 1, 
        "brailleAlignmentStyle": 0, 
        "enableEchoByWord": false, 
        "enableMagZoomerColorInversion": false, 
        "magCursorSize": 32, 
        "magSmoothingMode": 0, 
        "magZoomerLeft": 840, 
        "showMainWindow": true, 
        "sayAllStyle": 1, 
        "brailleSelectorIndicator": 192, 
        "presentDateFormat": "%x", 
        "magContrastLevel": 0, 
        "magMouseTrackingMode": 0, 
        "speakCellSpan": true, 
        "progressBarUpdateInterval": 10, 
        "speakCellCoordinates": true, 
        "enablePauseBreaks": true, 
        "brailleEOLIndicator": " $l", 
        "verbalizePunctuationStyle": 1, 
        "progressBarVerbosity": 1, 
        "enableSpeech": false, 
        "enableBraille": false, 
        "chatAnnounceBuddyTyping": false, 
        "speakMultiCaseStringsAsWords": false, 
        "enableBrailleGrouping": false, 
        "readTableCellRow": true, 
        "speechServerFactory": "speechdispatcherfactory", 
        "textAttributesBrailleIndicator": 0, 
        "enableMagCursorExplicitSize": false, 
        "messageVerbosityLevel": 1, 
        "enableMagLiveUpdating": true, 
        "enableSpeechIndentation": false, 
        "enableKeyEcho": true, 
        "magHideCursor": false, 
        "magZoomerBorderColor": "#000000", 
        "magPointerFollowsZoomer": true, 
        "mouseDwellDelay": 0, 
        "magBrightnessLevelRed": 0, 
        "enableMagnifier": false, 
        "magZoomFactor": 4.0, 
        "activeProfile": [
            "Default", 
            "default"
        ], 
        "enableMagZoomerBorder": false, 
        "flashVerbosityLevel": 1, 
        "enableFlashMessages": true, 
        "speechServerInfo": null, 
        "presentToolTips": false, 
        "flashIsPersistent": false, 
        "skipBlankCells": false, 
        "firstStart": false, 
        "largeObjectTextLength": 75, 
        "enableEchoBySentence": false, 
        "magContrastLevelBlue": 0, 
        "magContrastLevelRed": 0, 
        "enableContractedBraille": false, 
        "orcaModifierKeys": [
            "Insert", 
            "KP_Insert"
        ], 
        "enableMagCursor": true, 
        "speechRequiredStateString": "required", 
        "quitOrcaNoConfirmation": false, 
        "brailleRequiredStateString": "required", 
        "magCursorColor": "#000000", 
        "enablePositionSpeaking": false, 
        "magZoomerType": 0, 
        "onlySpeakDisplayedText": false, 
        "enableProgressBarUpdates": true, 
        "wrappedStructuralNavigation": true, 
        "chatRoomHistories": false, 
        "brailleVerbosityLevel": 1, 
        "enableFunctionKeys": true, 
        "enableModifierKeys": true, 
        "magCrossHairColor": "#000000", 
        "enableTutorialMessages": false, 
        "enableActionKeys": true, 
        "speakBlankLines": true, 
        "magColorFilteringMode": 0, 
        "magZoomerRight": 1680, 
        "keyboardLayout": 1, 
        "magTargetDisplay": "", 
        "disableBrailleEOL": false, 
        "magZoomerTop": 0, 
        "magSourceDisplay": "", 
        "enableDiacriticalKeys": false, 
        "enableMnemonicSpeaking": false, 
        "enabledBrailledTextAttributes": "size:; family-name:; weight:400; indent:0; underline:none; strikethrough:false; justification:left; style:normal; text-spelling:none;", 
        "speechVerbosityLevel": 1, 
        "enableMagCrossHair": true, 
        "enableBrailleMonitor": false, 
        "voices": {
            "default": {
                "established": false
            }, 
            "uppercase": {
                "average-pitch": 5.6
            }, 
            "system": {
                "established": false
            }, 
            "hyperlink": {
                "established": false
            }
        }, 
        "magContrastLevelGreen": 0, 
        "brailleFlashTime": 5000, 
        "magCrossHairSize": 16, 
        "enableMouseReview": false, 
        "enableNavigationKeys": false, 
        "magBrightnessLevelGreen": 0, 
        "chatSpeakRoomName": false, 
        "startingProfile": [
            "Default", 
            "default"
        ], 
        "enableLockingKeys": true, 
        "profile": [
            "Default", 
            "default"
        ], 
        "brailleRolenameStyle": 1, 
        "brailleLinkIndicator": 192, 
        "enableEchoByCharacter": false, 
        "magBrightnessLevelBlue": 0, 
        "enableBrailleContext": true, 
        "magControlTrackingMode": 2, 
        "magZoomerBottom": 1050, 
        "enablePrintableKeys": true, 
        "enabledSpokenTextAttributes": "size:; family-name:; weight:400; indent:0; underline:none; strikethrough:false; justification:left; style:normal; paragraph-style:; text-spelling:none;", 
        "chatMessageVerbosity": 0, 
        "presentTimeFormat": "%X", 
        "magBrightnessLevel": 0, 
        "presentRequiredState": false, 
        "enableMagCrossHairClip": false
    }
}
EOF

		case "$1" in
			magnifier)
				sed -i -e 's/\"enableMagnifier\": false/\"enableMagnifier\": true/' "$CHROOT_DIR/home/$USER_NAME/.local/share/orca/user-settings.conf"
			;;
			speech)
				sed -i -e 's/\"enableSpeech\": false/\"enableSpeech\": true/' "$CHROOT_DIR/home/$USER_NAME/.local/share/orca/user-settings.conf"
			;;
			braille)
				sed -i -e 's/\"enableBraille\": false/\"enableBraille\": true/' "$CHROOT_DIR/home/$USER_NAME/.local/share/orca/user-settings.conf"
			;;
			*)
			;;
		esac

		if [ "$HOME" = "/root" ] || [ -n "$IN_INITRAMFS" ]; then
			chmod 755 "$CHROOT_DIR/home/$USER_NAME/.local/share/orca"
			$DO_CHROOT chown $USER_NAME.$USER_NAME -R "/home/$USER_NAME/.local"
		fi
	fi
}

set_session()
{
	local uid=$($DO_CHROOT getent passwd $USER_NAME | awk -F: '{print $3}')

	# We need to start the accounts daemon somehow and wait for a half second
	# for it to get ready. Calling on AccountsService to set the X session with
	# only one call seems to error out, so querying the user by name seems to get
	# the daemon going.
	if [ -n "$STARTUP_SCRIPT" ]; then
		# I don't like having to write the file manually, but during testing I was
		# unable to get calls via dbus-send to work.
		cat <<EOF > $CHROOT_DIR/var/lib/AccountsService/users/$USER_NAME

[User]
XSession=$1
EOF
	else
		dbus-send --print-reply --type=method_call --system --dest=org.freedesktop.Accounts /org/freedesktop/Accounts org.freedesktop.Accounts.FindUserByName string:$USER_NAME > /dev/null 2>&1
		sleep 1
		dbus-send --print-reply --type=method_call --system --reply-timeout=1000 --dest=org.freedesktop.Accounts /org/freedesktop/Accounts/User$uid org.freedesktop.Accounts.User.SetXSession string:$1 > /dev/null 2>&1
	fi
}

create_conf()
{
	cat <<EOF > /tmp/casper-a11y.conf
UBIQUITY_A11Y_PROFILE=$1
EOF
}

if [ "$#" = "0" ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
	help
	exit 1
fi

while [ "$#" -gt 0 ];
do
	case "$1" in
		-chroot=*)
			CHROOT_DIR="${1#-chroot=}"
			DO_CHROOT="chroot $CHROOT_DIR"
			shift
			continue
		;;
		-user=*)
			USER_NAME="${1#-user=}"
			DO_SUDO="sudo -u $USER_NAME"
			shift
			continue
		;;
		-l|-login)
			SET_LOGIN=1
			shift
			continue
		;;
		-i|-initramfs)
			IN_INITRAMFS=1
			shift
			continue
		;;
		-d|-debug)
			set -x
			shift
			continue
		;;
		-script)
			STARTUP_SCRIPT=1
			shift
			continue
		;;
		*)
			PROFILE_NAME="$1"
			shift
			continue
		;;
	esac
done

if [ -n "$IN_INITRAMFS" ] && [ -z "$CHROOT_DIR" ]; then
	echo "Error: In initramfs, but no chroot directory specified."
	help
	exit 1
elif [ -n "$IN_INITRAMFS" ] && [ -z "$USER_NAME" ]; then
	echo "Error: In initramfs, but no username specified."
	help
	exit 1
fi

if [ -n "$SET_LOGIN" ] && [ "$HOME" != "/root" ] && [ -z "$IN_INITRAMFS" ]; then
	echo "Error: Setting up accessibility for login requires root privileges."
	help
	exit 1
fi


if [ -n "$CHROOT_DIR" ] || [ -n "$USER_NAME" ]; then
	if [ "$HOME" != "/root" ] && [ -z "$IN_INITRAMFS" ]; then
		echo "Error: You are not running as root."
		help
		exit 1
	fi
fi

if [ -n "$CHROOT_DIR" ]; then
	if [ ! -d "$CHROOT_DIR" ]; then
		echo "Error: Target chroot directory does not exist, or you do not have permission to access it."
		exit 1
	fi
	if [ -z "$IN_INITRAMFS" ] && ! type chroot >/dev/null 2>&1 ; then
		echo "Error: Chroot command not available in running environment."
		exit 1
	fi
fi

if [ -n "$STARTUP_SCRIPT" ]; then
	if [ -z "$USER_NAME" ]; then
		echo "Error: You have requested to create a startup script, but no user was specified."
		exit 1
	fi
	if [ "$HOME" != "/root" ] && [ -z "$IN_INITRAMFS" ]; then
		echo "Error: You have requested to create a startup script, but you do not have root"
		echo "privileges."
		exit 1
	fi
	if [ -z "$CHROOT_DIR" ]; then
		echo "Error: You have requested to create a startup script, but you did not specify"
		echo "a target directory to chroot to."
		exit 1
	fi
fi

# If no username was entered on the command line, grab the name of the current
# user, so we can write files to their home directory.
if [ -z "$USER_NAME" ]; then
	if [ -z "$USER" ]; then
		USER_NAME="${HOME#/home/}"
	else
		USER_NAME="$USER"
	fi
fi

# Check to see if a few necessary packages are present in the target
# environment.
GCONF_VERSION=$($DO_CHROOT /usr/bin/dpkg-query -W --showformat='${Version}' gconf2 2>/dev/null) || GCONF_VERSION=""
GLIBBIN_VERSION=$($DO_CHROOT /usr/bin/dpkg-query -W --showformat='${Version}' libglib2.0-bin 2>/dev/null) || GLIBBIN_VERSION=""
ORCA_VERSION=$($DO_CHROOT /usr/bin/dpkg-query -W --showformat='${Version}' gnome-orca 2>/dev/null) || ORCA_VERSION=""

if [ -n "$STARTUP_SCRIPT" ]; then
	cat <<EOF > $CHROOT_DIR/etc/init/a11y-profile-settings.conf
# a11y-profile-settings - A job to set up accessibility settings

description     "Accessib ility profile settings"

start on runlevel [2345]

umask 022

script
    sudo -u $USER_NAME /usr/bin/dbus-launch --exit-with-session /usr/bin/a11y-profile-settings
    sudo -u lightdm /usr/bin/dbus-launch --exit-with-session /usr/bin/a11y-profile-settings-lightdm
    rm /usr/bin/a11y-profile-settings /usr/bin/a11y-profile-settings-lightdm
    rm /etc/init/a11y-profile-settings.conf
end script
EOF
	cat <<EOF > $CHROOT_DIR/usr/bin/a11y-profile-settings
#!/bin/sh

# Created by the casper accessibility profile settings script on
# $(date).

# This script deletes itself once run.

EOF
	cat <<EOF > $CHROOT_DIR/usr/bin/a11y-profile-settings-lightdm
#!/bin/sh

# Created by the casper accessibility profile settings script on
# $(date).

# This script deletes itself once run.

EOF
fi

case $PROFILE_NAME in
	high-contrast)
		set_common_lowvis
		set_high_contrast
		create_conf $PROFILE_NAME
	;;
	magnifier)
		set_common_lowvis
		set_magnifier
		create_conf $PROFILE_NAME
	;;
	blindness)
		set_common_lowvis
		set_blindness
		create_conf screen-reader
	;;
	braille)
		set_common_lowvis
		set_braille
		create_conf $PROFILE_NAME
	;;
	keyboard-modifiers)
		set_common_motor
		set_keyboard_modifiers
		create_conf $PROFILE_NAME
	;;
	onscreen-keyboard)
		set_common_motor
		set_onscreen_keyboard
		create_conf $PROFILE_NAME
	;;
esac

if [ -n "$STARTUP_SCRIPT" ]; then
	chmod 755 $CHROOT_DIR/usr/bin/a11y-profile-settings*
fi