
proc Mosaic_Load { url {newwin goto} } {
    global mosaic uri
    if ![info exists mosaic(pid)] {
	set mosaic(pid) [PsByName $uri(mosaicApp)]
	if {[string length $mosaic(pid)] == 0} {
	    Exmh_Status "Starting $uri(mosaicApp)"
	    set mosaic(pid) [exec $uri(mosaicApp) $url &]
	    return
	} else {
	    Exmh_Status "$uri(mosaicApp) pid $mosaic(pid)"
	}
    }
    if [catch {open /tmp/Mosaic.$mosaic(pid) w} out] {
	error $out
    }
    puts $out $newwin
    puts $out $url
    close $out
    catch {unset mosaic(fail)}
    if [catch {exec kill -USR1 $mosaic(pid)} err] {
	if [info exists mosaic(fail)] {
	    Exmh_Status "Cannot signal xmosaic $mosaic(pid)"
	    unset mosaic(pid)
	    unset mosaic(fail)
	    error $err
	} else {
	    set mosaic(fail) $err
	    unset mosaic(pid)
	    Mosaic_Load $url
	}
    }
}
proc Mosaic_ShowPart { tkw part } {
    global uri
    if {! $uri(viewHtml)} {
	set start [$tkw index insert]
	$tkw insert insert "View HTML contents with "
	if {$uri(viewer) == "other"} {
	    $tkw insert insert $uri(viewerApp)
	} else {
	    $tkw insert insert $uri(viewer)
	}
	set end [$tkw index insert]
	$tkw insert insert "\n"
	TextButtonRange $tkw $start $end [list Mosaic_ShowPartDirect $tkw $part]

    } else {
	Mosaic_ShowPartDirect $tkw $part
    }
}
proc Mosaic_ShowPartDirect { tkw part } {
    global mimeHdr mime
    set fileName $mimeHdr($part,file)
    catch {exec rm -f /tmp/exmh.[pid].html}
    exec ln -s $fileName /tmp/exmh.[pid].html
    set fileName /tmp/exmh.[pid].html
    Exmh_Status "HTML Load $fileName"
    $tkw insert insert "Viewing HTML ...\n"
    URI_StartViewer file://localhost$fileName
}
