+++ /dev/null
-# safetk.tcl --
-#
-# Support procs to use Tk in safe interpreters.
-#
-# Copyright (c) 1997 Sun Microsystems, Inc.
-#
-# See the file "license.terms" for information on usage and redistribution
-# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-
-# see safetk.n for documentation
-
-#
-#
-# Note: It is now ok to let untrusted code being executed
-# between the creation of the interp and the actual loading
-# of Tk in that interp because the C side Tk_Init will
-# now look up the master interp and ask its safe::TkInit
-# for the actual parameters to use for it's initialization (if allowed),
-# not relying on the slave state.
-#
-
-# We use opt (optional arguments parsing)
-package require opt 0.4.1;
-
-namespace eval ::safe {
-
- # counter for safe toplevels
- variable tkSafeId 0
-}
-
-#
-# tkInterpInit : prepare the slave interpreter for tk loading
-# most of the real job is done by loadTk
-# returns the slave name (tkInterpInit does)
-#
-proc ::safe::tkInterpInit {slave argv} {
- global env tk_library
-
- # We have to make sure that the tk_library variable is normalized.
- set tk_library [file normalize $tk_library]
-
- # Clear Tk's access for that interp (path).
- allowTk $slave $argv
-
- # Ensure tk_library and subdirs (eg, ttk) are on the access path
- ::interp eval $slave [list set tk_library [::safe::interpAddToAccessPath $slave $tk_library]]
- foreach subdir [::safe::AddSubDirs [list $tk_library]] {
- ::safe::interpAddToAccessPath $slave $subdir
- }
- return $slave
-}
-
-
-# tkInterpLoadTk:
-# Do additional configuration as needed (calling tkInterpInit)
-# and actually load Tk into the slave.
-#
-# Either contained in the specified windowId (-use) or
-# creating a decorated toplevel for it.
-
-# empty definition for auto_mkIndex
-proc ::safe::loadTk {} {}
-
-::tcl::OptProc ::safe::loadTk {
- {slave -interp "name of the slave interpreter"}
- {-use -windowId {} "window Id to use (new toplevel otherwise)"}
- {-display -displayName {} "display name to use (current one otherwise)"}
-} {
- set displayGiven [::tcl::OptProcArgGiven "-display"]
- if {!$displayGiven} {
- # Try to get the current display from "."
- # (which might not exist if the master is tk-less)
- if {[catch {set display [winfo screen .]}]} {
- if {[info exists ::env(DISPLAY)]} {
- set display $::env(DISPLAY)
- } else {
- Log $slave "no winfo screen . nor env(DISPLAY)" WARNING
- set display ":0.0"
- }
- }
- }
-
- # Get state for access to the cleanupHook.
- namespace upvar ::safe S$slave state
-
- if {![::tcl::OptProcArgGiven "-use"]} {
- # create a decorated toplevel
- lassign [tkTopLevel $slave $display] w use
-
- # set our delete hook (slave arg is added by interpDelete)
- # to clean up both window related code and tkInit(slave)
- set state(cleanupHook) [list tkDelete {} $w]
- } else {
- # set our delete hook (slave arg is added by interpDelete)
- # to clean up tkInit(slave)
- set state(cleanupHook) [list disallowTk]
-
- # Let's be nice and also accept tk window names instead of ids
- if {[string match ".*" $use]} {
- set windowName $use
- set use [winfo id $windowName]
- set nDisplay [winfo screen $windowName]
- } else {
- # Check for a better -display value
- # (works only for multi screens on single host, but not
- # cross hosts, for that a tk window name would be better
- # but embeding is also usefull for non tk names)
- if {![catch {winfo pathname $use} name]} {
- set nDisplay [winfo screen $name]
- } else {
- # Can't have a better one
- set nDisplay $display
- }
- }
- if {$nDisplay ne $display} {
- if {$displayGiven} {
- return -code error -errorcode {TK DISPLAY SAFE} \
- "conflicting -display $display and -use $use -> $nDisplay"
- } else {
- set display $nDisplay
- }
- }
- }
-
- # Prepares the slave for tk with those parameters
- tkInterpInit $slave [list "-use" $use "-display" $display]
-
- load {} Tk $slave
-
- return $slave
-}
-
-proc ::safe::TkInit {interpPath} {
- variable tkInit
- if {[info exists tkInit($interpPath)]} {
- set value $tkInit($interpPath)
- Log $interpPath "TkInit called, returning \"$value\"" NOTICE
- return $value
- } else {
- Log $interpPath "TkInit called for interp with clearance:\
- preventing Tk init" ERROR
- return -code error -errorcode {TK SAFE PERMISSION} "not allowed"
- }
-}
-
-# safe::allowTk --
-#
-# Set tkInit(interpPath) to allow Tk to be initialized in
-# safe::TkInit.
-#
-# Arguments:
-# interpPath slave interpreter handle
-# argv arguments passed to safe::TkInterpInit
-#
-# Results:
-# none.
-
-proc ::safe::allowTk {interpPath argv} {
- variable tkInit
- set tkInit($interpPath) $argv
- return
-}
-
-
-# safe::disallowTk --
-#
-# Unset tkInit(interpPath) to disallow Tk from getting initialized
-# in safe::TkInit.
-#
-# Arguments:
-# interpPath slave interpreter handle
-#
-# Results:
-# none.
-
-proc ::safe::disallowTk {interpPath} {
- variable tkInit
- # This can already be deleted by the DeleteHook of the interp
- if {[info exists tkInit($interpPath)]} {
- unset tkInit($interpPath)
- }
- return
-}
-
-
-# safe::tkDelete --
-#
-# Clean up the window associated with the interp being deleted.
-#
-# Arguments:
-# interpPath slave interpreter handle
-#
-# Results:
-# none.
-
-proc ::safe::tkDelete {W window slave} {
-
- # we are going to be called for each widget... skip untill it's
- # top level
-
- Log $slave "Called tkDelete $W $window" NOTICE
- if {[::interp exists $slave]} {
- if {[catch {::safe::interpDelete $slave} msg]} {
- Log $slave "Deletion error : $msg"
- }
- }
- if {[winfo exists $window]} {
- Log $slave "Destroy toplevel $window" NOTICE
- destroy $window
- }
-
- # clean up tkInit(slave)
- disallowTk $slave
- return
-}
-
-proc ::safe::tkTopLevel {slave display} {
- variable tkSafeId
- incr tkSafeId
- set w ".safe$tkSafeId"
- if {[catch {toplevel $w -screen $display -class SafeTk} msg]} {
- return -code error -errorcode {TK TOPLEVEL SAFE} \
- "Unable to create toplevel for safe slave \"$slave\" ($msg)"
- }
- Log $slave "New toplevel $w" NOTICE
-
- set msg "Untrusted Tcl applet ($slave)"
- wm title $w $msg
-
- # Control frame (we must create a style for it)
- ttk::style layout TWarningFrame {WarningFrame.border -sticky nswe}
- ttk::style configure TWarningFrame -background red
-
- set wc $w.fc
- ttk::frame $wc -relief ridge -borderwidth 4 -style TWarningFrame
-
- # We will destroy the interp when the window is destroyed
- bindtags $wc [concat Safe$wc [bindtags $wc]]
- bind Safe$wc <Destroy> [list ::safe::tkDelete %W $w $slave]
-
- ttk::label $wc.l -text $msg -anchor w
-
- # We want the button to be the last visible item
- # (so be packed first) and at the right and not resizing horizontally
-
- # frame the button so it does not expand horizontally
- # but still have the default background instead of red one from the parent
- ttk::frame $wc.fb -borderwidth 0
- ttk::button $wc.fb.b -text "Delete" \
- -command [list ::safe::tkDelete $w $w $slave]
- pack $wc.fb.b -side right -fill both
- pack $wc.fb -side right -fill both -expand 1
- pack $wc.l -side left -fill both -expand 1 -ipady 2
- pack $wc -side bottom -fill x
-
- # Container frame
- frame $w.c -container 1
- pack $w.c -fill both -expand 1
-
- # return both the toplevel window name and the id to use for embedding
- list $w [winfo id $w.c]
-}
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