1 files changed, 262 insertions, 0 deletions
diff --git a/tk8.6/library/safetk.tcl b/tk8.6/library/safetk.tcl
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+++ b/tk8.6/library/safetk.tcl
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+# 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]
+}