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| Comment: | Continuing work on the syntax bubble diagrams. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
f73a84dfb073d4a038540ced733b12e4 |
| User & Date: | drh 2008-10-01 19:48:34 |
|
2008-10-01
| ||
| 21:28 | Continuing work on the bubble syntax diagram generator. (check-in: 4b56572316 user: drh tags: trunk) | |
| 19:48 | Continuing work on the syntax bubble diagrams. (check-in: f73a84dfb0 user: drh tags: trunk) | |
| 17:25 | Continuing work on the bubble syntax diagrams. (check-in: 2bb38606e0 user: drh tags: trunk) | |
Changes to art/syntax/bubble-generator.tcl.
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wm withdraw .
# Graphs:
#
set all_graphs {
alter-table-stmt {
stack
{line ALTER TABLE {opt {line database-name .}} table-name}
{tailbranch
{line RENAME TO new-table-name}
{line ADD {opt COLUMN} column-def}
}
}
X-create-table-stmt-1 {
stack
{line CREATE {or {} TEMP TEMPORARY} TABLE}
{opt {line IF NOT EXISTS}}
{line {opt {line database-name .}} table-name}
{tailbranch
{line ( {loop column-def ,} {loop {} {, table-constraint}} )}
{line AS select-stmt}
}
}
create-table-stmt {
stack
{line CREATE {or {} TEMP TEMPORARY} TABLE {opt {line IF NOT EXISTS}}}
{line {opt {line database-name .}} table-name
{tailbranch
{line ( {loop column-def ,} {loop {} {, table-constraint}} )}
{line AS select-stmt}
}
}
}
column-def {
................................................................................
}
type-name {
line {loop name {}} {or {}
{line ( number )}
{line ( number , number )}
}
}
X-column-def-c {
line column-name {or
{}
{line type-name}
{line type-name ( number )}
{line type-name ( number , number )}
} {loop {} column-constraint}
}
X-column-def-b {
line column-name {opt
{line type-name
{opt
{line ( number {opt {line , number}} )}
}
}
} {loop {} column-constraint}
}
column-constraint {
stack
{opt {line CONSTRAINT name}}
{or
{line PRIMARY KEY conflict-clause {opt AUTOINCREMENT}}
{line NOT NULL conflict-clause}
{line UNIQUE conflict-clause}
{line CHECK ( expr )}
{line DEFAULT {or value {line ( expr )}}}
{line COLLATE collation-name}
{line foreign-key-clause}
}
}
table-constraint {
stack
{opt {line CONSTRAINT name}}
{or
{line {or {line PRIMARY KEY} UNIQUE}
( column-list ) conflict-clause}
{line CHECK ( expr )}
{line FOREIGN KEY ( column-list ) foreign-key-clause }
}
}
foreign-key-clause {
stack
{line REFERENCES foreign-table {opt {line ( column-list )}}}
{toploop
{or
{line ON {or DELETE UPDATE INSERT}
{or {line SET NULL} {line SET DEFAULT}
CASCADE RESTRICT
}
}
{line MATCH name}
nil
}
{}
}
{or
{line {opt NOT} DEFERRABLE
{or
{}
{line INITIALLY DEFERRED}
{line INITIALLY IMMEDIATE}
}
}
nil
}
}
X-foreign-key-action {
or
{line MATCH name}
{line ON {or DELETE UPDATE INSERT}
{or {line SET NULL} {line SET DEFAULT}
CASCADE RESTRICT
}
}
}
X-foreign-key-deferment {
line {opt NOT} DEFERRABLE
{or
{}
{line INITIALLY DEFERRED}
{line INITIALLY IMMEDIATE}
}
}
conflict-clause {
opt {line ON CONFLICT {or ROLLBACK ABORT FAIL IGNORE REPLACE}}
}
}
# Draw the button bar
#
set bn 0
foreach {name graph} $all_graphs {
incr bn
................................................................................
set b .bb.b$bn
button $b -text Everything -command {draw_all_graphs}
pack $b -side top -fill x -expand 1
set tagcnt 0 ;# tag counter
set font1 {Helvetica 16 bold} ;# default token font
set font2 {Helvetica 15} ;# default variable font
set RADIUS 13 ;# default turn radius
set DPI 80 ;# dots per inch
# Draw a right-hand turn around. Approximately a ")"
#
proc draw_right_turnback {tag x y0 y1} {
global RADIUS
................................................................................
# Draw a bubble containing $txt.
#
proc draw_bubble {txt} {
global tagcnt
incr tagcnt
set tag x$tagcnt
if {$txt=="nil"} {
return [list $tag 0 0]
}
if {[regexp {^[a-z]} $txt]} {
set font $::font2
set istoken 0
} else {
set font $::font1
set istoken 1
................................................................................
# descripts a single term.
#
proc draw_line {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::RADIUS
set exx 0
set exy 0
foreach term $lx {
set m [draw_diagram $term]
foreach {t texx texy} $m break
if {$exx>0} {
set xn [expr {$exx+$sep}]
................................................................................
# Draw a sequence of terms from right to left.
#
proc draw_backwards_line {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::RADIUS
set exx 0
set exy 0
set lb {}
set n [llength $lx]
for {set i [expr {$n-1}]} {$i>=0} {incr i -1} {
lappend lb [lindex $lx $i]
}
................................................................................
# Draw a sequence of terms from top to bottom.
#
proc draw_stack {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::RADIUS
set btm 0
foreach term $lx {
set m [draw_diagram $term]
foreach {t exx exy} $m break
foreach {tx0 ty0 tx1 ty1} [.c bbox $t] break
if {$btm==0} {
set btm $ty1
................................................................................
return [list $tag $exit_x $exit_y]
}
proc draw_loop {forward back} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::RADIUS
set vsep [expr {$sep/2}]
foreach {ft fexx fexy} [draw_diagram $forward] break
foreach {fx0 fy0 fx1 fy1} [.c bbox $ft] break
set fw [expr {$fx1-$fx0}]
foreach {bt bexx bexy} [draw_backwards_line $back] break
foreach {bx0 by0 bx1 by1} [.c bbox $bt] break
................................................................................
return [list $tag $x1 $fexy]
}
proc draw_toploop {forward back} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::RADIUS
set vsep [expr {$sep/2}]
foreach {ft fexx fexy} [draw_diagram $forward] break
foreach {fx0 fy0 fx1 fy1} [.c bbox $ft] break
set fw [expr {$fx1-$fx0}]
foreach {bt bexx bexy} [draw_backwards_line $back] break
foreach {bx0 by0 bx1 by1} [.c bbox $bt] break
................................................................................
return [list $tag $x1 $fexy]
}
proc draw_or {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::RADIUS
set vsep [expr {$sep/2}]
set n [llength $lx]
set i 0
set mxw 0
foreach term $lx {
set m($i) [set mx [draw_diagram $term]]
set tx [lindex $mx 0]
foreach {x0 y0 x1 y1} [.c bbox $tx] break
set w [expr {$x1-$x0}]
if {$w>$mxw} {set mxw $w}
incr i
}
set mxw [expr {$mxw+20}] ;# extra space for arrowheads
set x0 0 ;# entry x
set x1 $sep ;# decender
set x2 [expr {$sep*2}] ;# start of choice
set x3 [expr {$mxw+$x2}] ;# end of choice
set x4 [expr {$x3+$sep}] ;# accender
set x5 [expr {$x4+$sep}] ;# exit x
for {set i 0} {$i<$n} {incr i} {
foreach {t texx texy} $m($i) break
foreach {tx0 ty0 tx1 ty1} [.c bbox $t] break
................................................................................
set w [expr {$tx1-$tx0}]
set dx [expr {($mxw-$w)/2 + $x2}]
.c move $t $dx 0
set texx [expr {$texx+$dx}]
set m($i) [list $t $texx $texy]
foreach {tx0 ty0 tx1 ty1} [.c bbox $t] break
if {$i==0} {
.c create line 0 0 $dx 0 -width 2 -tags $tag
.c create line $texx $texy [expr {$x5+1}] $texy -width 2 -tags $tag
set exy $texy
.c create arc -$sep 0 $sep [expr {$sep*2}] \
-width 2 -start 90 -extent -90 -tags $tag -style arc
.c create arc $x4 0 [expr {$x4+2*$sep}] [expr {2*$sep}] \
-width 2 -start 180 -extent -90 -tags $tag -style arc
set btm $ty1
................................................................................
} else {
set dy [expr {$btm - $ty0 + $vsep}]
if {$dy<2*$sep} {set dy [expr {2*$sep}]}
.c move $t 0 $dy
set texy [expr {$texy+$dy}]
if {$dx>$x2} {
.c create line $x2 $dy $dx $dy -width 2 -tags $tag -arrow last
.c create line $texx $texy $x3 $texy -width 2 -tags $tag -arrow last
}
set y1 [expr {$dy-2*$sep}]
.c create arc $x1 $y1 [expr {$x1+2*$sep}] $dy \
-width 2 -start 180 -extent 90 -style arc -tags $tag
set y2 [expr {$texy-2*$sep}]
.c create arc [expr {$x3-$sep}] $y2 $x4 $texy \
-width 2 -start 270 -extent 90 -style arc -tags $tag
................................................................................
return [list $tag $x5 $exy]
}
proc draw_tail_branch {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::RADIUS
set vsep [expr {$sep/2}]
set n [llength $lx]
set i 0
foreach term $lx {
set m($i) [set mx [draw_diagram $term]]
incr i
}
................................................................................
proc draw_diagram {spec} {
set n [llength $spec]
if {$n==1} {
return [draw_bubble $spec]
}
if {$n==0} {
return [draw_line {}]
}
set cmd [lindex $spec 0]
if {$cmd=="line"} {
return [draw_line [lrange $spec 1 end]]
}
if {$cmd=="stack"} {
return [draw_stack [lrange $spec 1 end]]
................................................................................
if {$cmd=="toploop"} {
return [draw_toploop [lindex $spec 1] [lindex $spec 2]]
}
if {$cmd=="or"} {
return [draw_or [lrange $spec 1 end]]
}
if {$cmd=="opt"} {
return [draw_or [list {} [lindex $spec 1]]]
}
if {$cmd=="tailbranch"} {
return [draw_tail_branch [lrange $spec 1 end]]
}
error "unknown operator: $cmd"
}
|
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wm withdraw .
# Graphs:
#
set all_graphs {
alter-table-stmt {
stack
{line ALTER TABLE {optx database-name .} table-name}
{tailbranch
{line RENAME TO new-table-name}
{line ADD {optx COLUMN} column-def}
}
}
analyze-stmt {
line ANALYZE {optx database-name .} table-name
}
attach-stmt {
line ATTACH {or DATABASE nil} database-filename AS attachment-name
}
begin-stmt {
line BEGIN {or nil DEFERRED IMMEDIATE EXCLUSIVE}
{optx TRANSACTION {optx name}}
}
commit-stmt {
line {or COMMIT END} {optx TRANSACTION {optx name}}
}
rollback-stmt {
line ROLLBACK {optx TRANSACTION {optx name}}
}
create-index-stmt {
stack
{line CREATE {opt UNIQUE} INDEX {opt IF NOT EXISTS}}
{line {optx database-name .} index-name
ON table-name ( {loop indexed-column {}} )}
}
indexed-column {
line column-name {optx COLLATE collation-name} {or ASC DESC nil}
}
create-table-stmt {
stack
{line CREATE {or {} TEMP TEMPORARY} TABLE {opt IF NOT EXISTS}}
{line {optx database-name .} table-name
{tailbranch
{line ( {loop column-def ,} {loop {} {, table-constraint}} )}
{line AS select-stmt}
}
}
}
column-def {
................................................................................
}
type-name {
line {loop name {}} {or {}
{line ( number )}
{line ( number , number )}
}
}
column-constraint {
stack
{optx CONSTRAINT name}
{or
{line PRIMARY KEY conflict-clause {opt AUTOINCREMENT}}
{line NOT NULL conflict-clause}
{line UNIQUE conflict-clause}
{line CHECK ( expr )}
{line DEFAULT {or value {line ( expr )}}}
{line COLLATE collation-name}
{line foreign-key-clause}
}
}
table-constraint {
stack
{optx CONSTRAINT name}
{or
{line {or {line PRIMARY KEY} UNIQUE}
( column-list ) conflict-clause}
{line CHECK ( expr )}
{line FOREIGN KEY ( column-list ) foreign-key-clause }
}
}
foreign-key-clause {
stack
{line REFERENCES foreign-table {optx ( column-list )}}
{toploop
{or
{line ON {or DELETE UPDATE INSERT}
{or {line SET NULL} {line SET DEFAULT}
CASCADE RESTRICT
}
}
{line MATCH name}
nil
}
{}
}
{or
{line {optx NOT} DEFERRABLE
{or
{line INITIALLY DEFERRED}
{line INITIALLY IMMEDIATE}
{}
}
}
nil
}
}
conflict-clause {
opt {line ON CONFLICT {or ROLLBACK ABORT FAIL IGNORE REPLACE}}
}
expr {
or
{line literal-value}
{line {optx {optx database-name .} table-name .} column-name}
{line unary-operator expr}
{line expr binary-operator expr}
{line function-name ( {or {toploop expr ,} *} )}
{line ( expr )}
{line CAST ( expr AS type-name )}
{line expr COLLATE collation-name}
{line expr {optx NOT} {or LIKE GLOB REGEXP MATCH} expr
{optx ESCAPE expr}}
{line expr {or ISNULL NOTNULL {line IS NULL} {line NOT NULL}}}
{line expr {optx NOT} BETWEEN expr AND expr}
{line expr {optx NOT} IN
{or
{line ( select-stmt )}
{line ( {loop expr ,} )}
{line {optx database-name .} table-name}
}
}
{line {optx {optx NOT} EXISTS} ( select-stmt )}
{line CASE {optx expr} {loop {line WHEN expr THEN expr} {}}
{optx ELSE expr} END}
}
}
# Draw the button bar
#
set bn 0
foreach {name graph} $all_graphs {
incr bn
................................................................................
set b .bb.b$bn
button $b -text Everything -command {draw_all_graphs}
pack $b -side top -fill x -expand 1
set tagcnt 0 ;# tag counter
set font1 {Helvetica 16 bold} ;# default token font
set font2 {Helvetica 15} ;# default variable font
set RADIUS 9 ;# default turn radius
set HSEP 17 ;# horizontal separation
set VSEP 9 ;# vertical separation
set DPI 80 ;# dots per inch
# Draw a right-hand turn around. Approximately a ")"
#
proc draw_right_turnback {tag x y0 y1} {
global RADIUS
................................................................................
# Draw a bubble containing $txt.
#
proc draw_bubble {txt} {
global tagcnt
incr tagcnt
set tag x$tagcnt
if {$txt=="nil"} {
.c create line 0 0 1 0 -width 2 -tags $tag
return [list $tag 1 0]
}
if {[regexp {^[a-z]} $txt]} {
set font $::font2
set istoken 0
} else {
set font $::font1
set istoken 1
................................................................................
# descripts a single term.
#
proc draw_line {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::HSEP
set exx 0
set exy 0
foreach term $lx {
set m [draw_diagram $term]
foreach {t texx texy} $m break
if {$exx>0} {
set xn [expr {$exx+$sep}]
................................................................................
# Draw a sequence of terms from right to left.
#
proc draw_backwards_line {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::HSEP
set exx 0
set exy 0
set lb {}
set n [llength $lx]
for {set i [expr {$n-1}]} {$i>=0} {incr i -1} {
lappend lb [lindex $lx $i]
}
................................................................................
# Draw a sequence of terms from top to bottom.
#
proc draw_stack {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::VSEP
set btm 0
foreach term $lx {
set m [draw_diagram $term]
foreach {t exx exy} $m break
foreach {tx0 ty0 tx1 ty1} [.c bbox $t] break
if {$btm==0} {
set btm $ty1
................................................................................
return [list $tag $exit_x $exit_y]
}
proc draw_loop {forward back} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::VSEP
set vsep [expr {$sep/2}]
foreach {ft fexx fexy} [draw_diagram $forward] break
foreach {fx0 fy0 fx1 fy1} [.c bbox $ft] break
set fw [expr {$fx1-$fx0}]
foreach {bt bexx bexy} [draw_backwards_line $back] break
foreach {bx0 by0 bx1 by1} [.c bbox $bt] break
................................................................................
return [list $tag $x1 $fexy]
}
proc draw_toploop {forward back} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::VSEP
set vsep [expr {$sep/2}]
foreach {ft fexx fexy} [draw_diagram $forward] break
foreach {fx0 fy0 fx1 fy1} [.c bbox $ft] break
set fw [expr {$fx1-$fx0}]
foreach {bt bexx bexy} [draw_backwards_line $back] break
foreach {bx0 by0 bx1 by1} [.c bbox $bt] break
................................................................................
return [list $tag $x1 $fexy]
}
proc draw_or {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::VSEP
set vsep [expr {$sep/2}]
set n [llength $lx]
set i 0
set mxw 0
foreach term $lx {
set m($i) [set mx [draw_diagram $term]]
set tx [lindex $mx 0]
foreach {x0 y0 x1 y1} [.c bbox $tx] break
set w [expr {$x1-$x0}]
if {$i>0} {set w [expr {$w+20}]} ;# extra space for arrowheads
if {$w>$mxw} {set mxw $w}
incr i
}
set x0 0 ;# entry x
set x1 $sep ;# decender
set x2 [expr {$sep*2}] ;# start of choice
set xc [expr {$mxw/2}] ;# center point
set x3 [expr {$mxw+$x2}] ;# end of choice
set x4 [expr {$x3+$sep}] ;# accender
set x5 [expr {$x4+$sep}] ;# exit x
for {set i 0} {$i<$n} {incr i} {
foreach {t texx texy} $m($i) break
foreach {tx0 ty0 tx1 ty1} [.c bbox $t] break
................................................................................
set w [expr {$tx1-$tx0}]
set dx [expr {($mxw-$w)/2 + $x2}]
.c move $t $dx 0
set texx [expr {$texx+$dx}]
set m($i) [list $t $texx $texy]
foreach {tx0 ty0 tx1 ty1} [.c bbox $t] break
if {$i==0} {
if {$dx>$x2} {set ax last} {set ax none}
.c create line 0 0 $dx 0 -width 2 -tags $tag -arrow $ax
.c create line $texx $texy [expr {$x5+1}] $texy -width 2 -tags $tag
set exy $texy
.c create arc -$sep 0 $sep [expr {$sep*2}] \
-width 2 -start 90 -extent -90 -tags $tag -style arc
.c create arc $x4 0 [expr {$x4+2*$sep}] [expr {2*$sep}] \
-width 2 -start 180 -extent -90 -tags $tag -style arc
set btm $ty1
................................................................................
} else {
set dy [expr {$btm - $ty0 + $vsep}]
if {$dy<2*$sep} {set dy [expr {2*$sep}]}
.c move $t 0 $dy
set texy [expr {$texy+$dy}]
if {$dx>$x2} {
.c create line $x2 $dy $dx $dy -width 2 -tags $tag -arrow last
if {$dx<$xc-2} {set ax last} {set ax none}
.c create line $texx $texy $x3 $texy -width 2 -tags $tag -arrow $ax
}
set y1 [expr {$dy-2*$sep}]
.c create arc $x1 $y1 [expr {$x1+2*$sep}] $dy \
-width 2 -start 180 -extent 90 -style arc -tags $tag
set y2 [expr {$texy-2*$sep}]
.c create arc [expr {$x3-$sep}] $y2 $x4 $texy \
-width 2 -start 270 -extent 90 -style arc -tags $tag
................................................................................
return [list $tag $x5 $exy]
}
proc draw_tail_branch {lx} {
global tagcnt
incr tagcnt
set tag x$tagcnt
set sep $::VSEP
set vsep [expr {$sep/2}]
set n [llength $lx]
set i 0
foreach term $lx {
set m($i) [set mx [draw_diagram $term]]
incr i
}
................................................................................
proc draw_diagram {spec} {
set n [llength $spec]
if {$n==1} {
return [draw_bubble $spec]
}
if {$n==0} {
return [draw_bubble nil]
}
set cmd [lindex $spec 0]
if {$cmd=="line"} {
return [draw_line [lrange $spec 1 end]]
}
if {$cmd=="stack"} {
return [draw_stack [lrange $spec 1 end]]
................................................................................
if {$cmd=="toploop"} {
return [draw_toploop [lindex $spec 1] [lindex $spec 2]]
}
if {$cmd=="or"} {
return [draw_or [lrange $spec 1 end]]
}
if {$cmd=="opt"} {
set args [lrange $spec 1 end]
if {[llength $args]==1} {
return [draw_or [list nil [lindex $args 0]]]
} else {
return [draw_or [list nil "line $args"]]
}
}
if {$cmd=="optx"} {
set args [lrange $spec 1 end]
if {[llength $args]==1} {
return [draw_or [list [lindex $args 0] nil]]
} else {
return [draw_or [list "line $args" nil]]
}
}
if {$cmd=="tailbranch"} {
return [draw_tail_branch [lrange $spec 1 end]]
}
error "unknown operator: $cmd"
}
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