SQLite-PPL/contrib/sqlitecon.tcl at master · FlashSQL/SQLite-PPL · GitHub

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# A Tk console widget for SQLite. Invoke sqlitecon::create with a window name,

# a prompt string, a title to set a new top-level window, and the SQLite

# database handle. For example:

# sqlitecon::create .sqlcon {sql:- } {SQL Console} db

# A toplevel window is created that allows you to type in SQL commands to

# be processed on the spot.

# A limited set of dot-commands are supported:

# .table

# .schema ?TABLE?

# .mode list|column|multicolumn|line

# .exit

# In addition, a new SQL function named "edit()" is created. This function

# takes a single text argument and returns a text result. Whenever the

# the function is called, it pops up a new toplevel window containing a

# text editor screen initialized to the argument. When the "OK" button

# is pressed, whatever revised text is in the text editor is returned as

# the result of the edit() function. This allows text fields of SQL tables

# to be edited quickly and easily as follows:

# UPDATE table1 SET dscr = edit(dscr) WHERE rowid=15;

# Create a namespace to work in

namespace eval ::sqlitecon {

# do nothing

}

# Create a console widget named $w. The prompt string is $prompt.

# The title at the top of the window is $title. The database connection

# object is $db

proc sqlitecon::create {w prompt title db} {

upvar #0 $w.t v

if {[winfo exists $w]} {destroy $w}

if {[info exists v]} {unset v}

toplevel $w

wm title $w $title

wm iconname $w $title

frame $w.mb -bd 2 -relief raised

pack $w.mb -side top -fill x

menubutton $w.mb.file -text File -menu $w.mb.file.m

menubutton $w.mb.edit -text Edit -menu $w.mb.edit.m

pack $w.mb.file $w.mb.edit -side left -padx 8 -pady 1

set m [menu $w.mb.file.m -tearoff 0]

$m add command -label {Close} -command "destroy $w"

sqlitecon::create_child $w $prompt $w.mb.edit.m

set v(db) $db

$db function edit ::sqlitecon::_edit

}

# This routine creates a console as a child window within a larger

# window. It also creates an edit menu named "$editmenu" if $editmenu!="".

# The calling function is responsible for posting the edit menu.

proc sqlitecon::create_child {w prompt editmenu} {

upvar #0 $w.t v

if {$editmenu!=""} {

set m [menu $editmenu -tearoff 0]

$m add command -label Cut -command "sqlitecon::Cut $w.t"

$m add command -label Copy -command "sqlitecon::Copy $w.t"

$m add command -label Paste -command "sqlitecon::Paste $w.t"

$m add command -label {Clear Screen} -command "sqlitecon::Clear $w.t"

$m add separator

$m add command -label {Save As...} -command "sqlitecon::SaveFile $w.t"

catch {$editmenu config -postcommand "sqlitecon::EnableEditMenu $w"}

}

scrollbar $w.sb -orient vertical -command "$w.t yview"

pack $w.sb -side right -fill y

text $w.t -font fixed -yscrollcommand "$w.sb set"

pack $w.t -side right -fill both -expand 1

bindtags $w.t Sqlitecon

set v(editmenu) $editmenu

set v(history) 0

set v(historycnt) 0

set v(current) -1

set v(prompt) $prompt

set v(prior) {}

set v(plength) [string length $v(prompt)]

set v(x) 0

set v(y) 0

set v(mode) column

set v(header) on

$w.t mark set insert end

$w.t tag config ok -foreground blue

$w.t tag config err -foreground red

$w.t insert end $v(prompt)

$w.t mark set out 1.0

after idle "focus $w.t"

}

bind Sqlitecon <1> {sqlitecon::Button1 %W %x %y}

bind Sqlitecon <B1-Motion> {sqlitecon::B1Motion %W %x %y}

bind Sqlitecon <B1-Leave> {sqlitecon::B1Leave %W %x %y}

bind Sqlitecon <B1-Enter> {sqlitecon::cancelMotor %W}

bind Sqlitecon <ButtonRelease-1> {sqlitecon::cancelMotor %W}

bind Sqlitecon <KeyPress> {sqlitecon::Insert %W %A}

bind Sqlitecon <Left> {sqlitecon::Left %W}

bind Sqlitecon <Control-b> {sqlitecon::Left %W}

bind Sqlitecon <Right> {sqlitecon::Right %W}

bind Sqlitecon <Control-f> {sqlitecon::Right %W}

bind Sqlitecon <BackSpace> {sqlitecon::Backspace %W}

bind Sqlitecon <Control-h> {sqlitecon::Backspace %W}

bind Sqlitecon <Delete> {sqlitecon::Delete %W}

bind Sqlitecon <Control-d> {sqlitecon::Delete %W}

bind Sqlitecon <Home> {sqlitecon::Home %W}

bind Sqlitecon <Control-a> {sqlitecon::Home %W}

bind Sqlitecon <End> {sqlitecon::End %W}

bind Sqlitecon <Control-e> {sqlitecon::End %W}

bind Sqlitecon <Return> {sqlitecon::Enter %W}

bind Sqlitecon <KP_Enter> {sqlitecon::Enter %W}

bind Sqlitecon <Up> {sqlitecon::Prior %W}

bind Sqlitecon <Control-p> {sqlitecon::Prior %W}

bind Sqlitecon <Down> {sqlitecon::Next %W}

bind Sqlitecon <Control-n> {sqlitecon::Next %W}

bind Sqlitecon <Control-k> {sqlitecon::EraseEOL %W}

bind Sqlitecon <<Cut>> {sqlitecon::Cut %W}

bind Sqlitecon <<Copy>> {sqlitecon::Copy %W}

bind Sqlitecon <<Paste>> {sqlitecon::Paste %W}

bind Sqlitecon <<Clear>> {sqlitecon::Clear %W}

# Insert a single character at the insertion cursor

proc sqlitecon::Insert {w a} {

$w insert insert $a

$w yview insert

}

# Move the cursor one character to the left

proc sqlitecon::Left {w} {

upvar #0 $w v

scan [$w index insert] %d.%d row col

if {$col>$v(plength)} {

$w mark set insert "insert -1c"

}

# Erase the character to the left of the cursor

proc sqlitecon::Backspace {w} {

upvar #0 $w v

scan [$w index insert] %d.%d row col

if {$col>$v(plength)} {

$w delete {insert -1c}

}

# Erase to the end of the line

proc sqlitecon::EraseEOL {w} {

upvar #0 $w v

scan [$w index insert] %d.%d row col

if {$col>=$v(plength)} {

$w delete insert {insert lineend}

}

# Move the cursor one character to the right

proc sqlitecon::Right {w} {

$w mark set insert "insert +1c"

}

# Erase the character to the right of the cursor

proc sqlitecon::Delete w {

$w delete insert

}

# Move the cursor to the beginning of the current line

proc sqlitecon::Home w {

upvar #0 $w v

scan [$w index insert] %d.%d row col

$w mark set insert $row.$v(plength)

}

# Move the cursor to the end of the current line

proc sqlitecon::End w {

$w mark set insert {insert lineend}

}

# Add a line to the history

proc sqlitecon::addHistory {w line} {

upvar #0 $w v

if {$v(historycnt)>0} {

set last [lindex $v(history) [expr $v(historycnt)-1]]

if {[string compare $last $line]} {

lappend v(history) $line

incr v(historycnt)

}

} else {

set v(history) [list $line]

set v(historycnt) 1

}

set v(current) $v(historycnt)

}

# Called when "Enter" is pressed. Do something with the line

# of text that was entered.

proc sqlitecon::Enter w {

upvar #0 $w v

scan [$w index insert] %d.%d row col

set start $row.$v(plength)

set line [$w get $start "$start lineend"]

$w insert end \n

$w mark set out end

if {$v(prior)==""} {

set cmd $line

} else {

set cmd $v(prior)\n$line

}

if {[string index $cmd 0]=="." || [$v(db) complete $cmd]} {

regsub -all {\n} [string trim $cmd] { } cmd2

addHistory $w $cmd2

set rc [catch {DoCommand $w $cmd} res]

if {![winfo exists $w]} return

if {$rc} {

$w insert end $res\n err

} elseif {[string length $res]>0} {

$w insert end $res\n ok

}

set v(prior) {}

$w insert end $v(prompt)

} else {

set v(prior) $cmd

regsub -all {[^ ]} $v(prompt) . x

$w insert end $x

}

$w mark set insert end

$w mark set out {insert linestart}

$w yview insert

}

# Execute a single SQL command. Pay special attention to control

# directives that begin with "."

# The return value is the text output from the command, properly

# formatted.

proc sqlitecon::DoCommand {w cmd} {

upvar #0 $w v

set mode $v(mode)

set header $v(header)

if {[regexp {^(\.[a-z]+)} $cmd all word]} {

if {$word==".mode"} {

regexp {^.[a-z]+ +([a-z]+)} $cmd all v(mode)

return {}

} elseif {$word==".exit"} {

destroy [winfo toplevel $w]

return {}

} elseif {$word==".header"} {

regexp {^.[a-z]+ +([a-z]+)} $cmd all v(header)

return {}

} elseif {$word==".tables"} {

set mode multicolumn

set cmd {SELECT name FROM sqlite_master WHERE type='table'

UNION ALL

SELECT name FROM sqlite_temp_master WHERE type='table'}

$v(db) eval {PRAGMA database_list} {

if {$name!="temp" && $name!="main"} {

append cmd "UNION ALL SELECT name FROM $name.sqlite_master\

WHERE type='table'"

}

append cmd { ORDER BY 1}

} elseif {$word==".fullschema"} {

set pattern %

regexp {^.[a-z]+ +([^ ]+)} $cmd all pattern

set mode list

set header 0

set cmd "SELECT sql FROM sqlite_master WHERE tbl_name LIKE '$pattern'

AND sql NOT NULL UNION ALL SELECT sql FROM sqlite_temp_master

WHERE tbl_name LIKE '$pattern' AND sql NOT NULL"

$v(db) eval {PRAGMA database_list} {

if {$name!="temp" && $name!="main"} {

append cmd " UNION ALL SELECT sql FROM $name.sqlite_master\

WHERE tbl_name LIKE '$pattern' AND sql NOT NULL"

}

} elseif {$word==".schema"} {

set pattern %

regexp {^.[a-z]+ +([^ ]+)} $cmd all pattern

set mode list

set header 0

set cmd "SELECT sql FROM sqlite_master WHERE name LIKE '$pattern'

AND sql NOT NULL UNION ALL SELECT sql FROM sqlite_temp_master

WHERE name LIKE '$pattern' AND sql NOT NULL"

$v(db) eval {PRAGMA database_list} {

if {$name!="temp" && $name!="main"} {

append cmd " UNION ALL SELECT sql FROM $name.sqlite_master\

WHERE name LIKE '$pattern' AND sql NOT NULL"

}

} else {

return \

".exit\n.mode line|list|column\n.schema ?TABLENAME?\n.tables"

}

set res {}

if {$mode=="list"} {

$v(db) eval $cmd x {

set sep {}

foreach col $x(*) {

append res $sep$x($col)

set sep |

}

append res \n

}

if {[info exists x(*)] && $header} {

set sep {}

set hdr {}

foreach col $x(*) {

append hdr $sep$col

set sep |

}

set res $hdr\n$res

}

} elseif {[string range $mode 0 2]=="col"} {

set y {}

$v(db) eval $cmd x {

foreach col $x(*) {

if {![info exists cw($col)] || $cw($col)<[string length $x($col)]} {

set cw($col) [string length $x($col)]

}

lappend y $x($col)

}

if {[info exists x(*)] && $header} {

set hdr {}

set ln {}

set dash ---------------------------------------------------------------

append dash ------------------------------------------------------------

foreach col $x(*) {

if {![info exists cw($col)] || $cw($col)<[string length $col]} {

set cw($col) [string length $col]

}

lappend hdr $col

lappend ln [string range $dash 1 $cw($col)]

}

set y [concat $hdr $ln $y]

}

if {[info exists x(*)]} {

set format {}

set arglist {}

set arglist2 {}

set i 0

foreach col $x(*) {

lappend arglist x$i

append arglist2 " \$x$i"

incr i

append format " %-$cw($col)s"

}

set format [string trimleft $format]\n

if {[llength $arglist]>0} {

foreach $arglist $y "append res \[format [list $format] $arglist2\]"

}

} elseif {$mode=="multicolumn"} {

set y [$v(db) eval $cmd]

set max 0

foreach e $y {

if {$max<[string length $e]} {set max [string length $e]}

}

set ncol [expr {int(80/($max+2))}]

if {$ncol<1} {set ncol 1}

set nelem [llength $y]

set nrow [expr {($nelem+$ncol-1)/$ncol}]

set format "%-${max}s"

for {set i 0} {$i<$nrow} {incr i} {

set j $i

while 1 {

append res [format $format [lindex $y $j]]

incr j $nrow

if {$j>=$nelem} break

append res { }

}

append res \n

}

} else {

$v(db) eval $cmd x {

foreach col $x(*) {append res "$col = $x($col)\n"}

append res \n

}

return [string trimright $res]

}

# Change the line to the previous line

proc sqlitecon::Prior w {

upvar #0 $w v

if {$v(current)<=0} return

incr v(current) -1

set line [lindex $v(history) $v(current)]

sqlitecon::SetLine $w $line

}

# Change the line to the next line

proc sqlitecon::Next w {

upvar #0 $w v

if {$v(current)>=$v(historycnt)} return

incr v(current) 1

set line [lindex $v(history) $v(current)]

sqlitecon::SetLine $w $line

}

# Change the contents of the entry line

proc sqlitecon::SetLine {w line} {

upvar #0 $w v

scan [$w index insert] %d.%d row col

set start $row.$v(plength)

$w delete $start end

$w insert end $line

$w mark set insert end

$w yview insert

}

# Called when the mouse button is pressed at position $x,$y on

# the console widget.

proc sqlitecon::Button1 {w x y} {

global tkPriv

upvar #0 $w v

set v(mouseMoved) 0

set v(pressX) $x

set p [sqlitecon::nearestBoundry $w $x $y]

scan [$w index insert] %d.%d ix iy

scan $p %d.%d px py

if {$px==$ix} {

$w mark set insert $p

}

$w mark set anchor $p

focus $w

}

# Find the boundry between characters that is nearest

# to $x,$y

proc sqlitecon::nearestBoundry {w x y} {

set p [$w index @$x,$y]

set bb [$w bbox $p]

if {![string compare $bb ""]} {return $p}

if {($x-[lindex $bb 0])<([lindex $bb 2]/2)} {return $p}

$w index "$p + 1 char"

}

# This routine extends the selection to the point specified by $x,$y

proc sqlitecon::SelectTo {w x y} {

upvar #0 $w v

set cur [sqlitecon::nearestBoundry $w $x $y]

if {[catch {$w index anchor}]} {

$w mark set anchor $cur

}

set anchor [$w index anchor]

if {[$w compare $cur != $anchor] || (abs($v(pressX) - $x) >= 3)} {

if {$v(mouseMoved)==0} {

$w tag remove sel 0.0 end

}

set v(mouseMoved) 1

}

if {[$w compare $cur < anchor]} {

set first $cur

set last anchor

} else {

set first anchor

set last $cur

}

if {$v(mouseMoved)} {

$w tag remove sel 0.0 $first

$w tag add sel $first $last

$w tag remove sel $last end

update idletasks

}

# Called whenever the mouse moves while button-1 is held down.

proc sqlitecon::B1Motion {w x y} {

upvar #0 $w v

set v(y) $y

set v(x) $x

sqlitecon::SelectTo $w $x $y

}

# Called whenever the mouse leaves the boundries of the widget

# while button 1 is held down.

proc sqlitecon::B1Leave {w x y} {

upvar #0 $w v

set v(y) $y

set v(x) $x

sqlitecon::motor $w

}

# This routine is called to automatically scroll the window when

# the mouse drags offscreen.

proc sqlitecon::motor w {

upvar #0 $w v

if {![winfo exists $w]} return

if {$v(y)>=[winfo height $w]} {

$w yview scroll 1 units

} elseif {$v(y)<0} {

$w yview scroll -1 units

} else {

return

}

sqlitecon::SelectTo $w $v(x) $v(y)

set v(timer) [after 50 sqlitecon::motor $w]

}

# This routine cancels the scrolling motor if it is active

proc sqlitecon::cancelMotor w {

upvar #0 $w v

catch {after cancel $v(timer)}

catch {unset v(timer)}

}

# Do a Copy operation on the stuff currently selected.

proc sqlitecon::Copy w {

if {![catch {set text [$w get sel.first sel.last]}]} {

clipboard clear -displayof $w

clipboard append -displayof $w $text

}

# Return 1 if the selection exists and is contained

# entirely on the input line. Return 2 if the selection

# exists but is not entirely on the input line. Return 0

# if the selection does not exist.

proc sqlitecon::canCut w {

set r [catch {

scan [$w index sel.first] %d.%d s1x s1y

scan [$w index sel.last] %d.%d s2x s2y

scan [$w index insert] %d.%d ix iy

}]

if {$r==1} {return 0}

if {$s1x==$ix && $s2x==$ix} {return 1}

return 2

}

# Do a Cut operation if possible. Cuts are only allowed

# if the current selection is entirely contained on the

# current input line.

proc sqlitecon::Cut w {

if {[sqlitecon::canCut $w]==1} {

sqlitecon::Copy $w

$w delete sel.first sel.last

}

# Do a paste opeation.

proc sqlitecon::Paste w {

if {[sqlitecon::canCut $w]==1} {

$w delete sel.first sel.last

}

if {[catch {selection get -displayof $w -selection CLIPBOARD} topaste]

&& [catch {selection get -displayof $w -selection PRIMARY} topaste]} {

return

}

if {[info exists ::$w]} {

set prior 0

foreach line [split $topaste \n] {

if {$prior} {

sqlitecon::Enter $w

update

}

set prior 1

$w insert insert $line

}

} else {

$w insert insert $topaste

}

# Enable or disable entries in the Edit menu

proc sqlitecon::EnableEditMenu w {

upvar #0 $w.t v

set m $v(editmenu)

if {$m=="" || ![winfo exists $m]} return

switch [sqlitecon::canCut $w.t] {

0 {

$m entryconf Copy -state disabled

$m entryconf Cut -state disabled

}

1 {

$m entryconf Copy -state normal

$m entryconf Cut -state normal

}

2 {

$m entryconf Copy -state normal

$m entryconf Cut -state disabled

}

# Prompt the user for the name of a writable file. Then write the

# entire contents of the console screen to that file.

proc sqlitecon::SaveFile w {

set types {

{{Text Files} {.txt}}

{{All Files} *}

}

set f [tk_getSaveFile -filetypes $types -title "Write Screen To..."]

if {$f!=""} {

if {[catch {open $f w} fd]} {

tk_messageBox -type ok -icon error -message $fd

} else {

puts $fd [string trimright [$w get 1.0 end] \n]

close $fd

}

# Erase everything from the console above the insertion line.

proc sqlitecon::Clear w {

$w delete 1.0 {insert linestart}

}

# An in-line editor for SQL

proc sqlitecon::_edit {origtxt {title {}}} {

for {set i 0} {[winfo exists .ed$i]} {incr i} continue

set w .ed$i

toplevel $w

wm protocol $w WM_DELETE_WINDOW "$w.b.can invoke"

wm title $w {Inline SQL Editor}

frame $w.b

pack $w.b -side bottom -fill x

button $w.b.can -text Cancel -width 6 -command [list set ::$w 0]

button $w.b.ok -text OK -width 6 -command [list set ::$w 1]

button $w.b.cut -text Cut -width 6 -command [list ::sqlitecon::Cut $w.t]

button $w.b.copy -text Copy -width 6 -command [list ::sqlitecon::Copy $w.t]

button $w.b.paste -text Paste -width 6 -command [list ::sqlitecon::Paste $w.t]

set ::$w {}

pack $w.b.cut $w.b.copy $w.b.paste $w.b.can $w.b.ok\

-side left -padx 5 -pady 5 -expand 1

if {$title!=""} {

label $w.title -text $title

pack $w.title -side top -padx 5 -pady 5

}

text $w.t -bg white -fg black -yscrollcommand [list $w.sb set]

pack $w.t -side left -fill both -expand 1

scrollbar $w.sb -orient vertical -command [list $w.t yview]

pack $w.sb -side left -fill y

$w.t insert end $origtxt

vwait ::$w

if {[set ::$w]} {

set txt [string trimright [$w.t get 1.0 end]]

} else {

set txt $origtxt

}

destroy $w

return $txt

}

SQLite-PPL/contrib/sqlitecon.tcl at master · FlashSQL/SQLite-PPL · GitHub

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