# text.tcl -- # # This file defines the default bindings for Tk text widgets and provides # procedures that help in implementing the bindings. # # RCS: @(#) $Id: text.tcl,v 1.12 2000/04/17 23:24:29 ericm Exp $ # # Copyright (c) 1992-1994 The Regents of the University of California. # Copyright (c) 1994-1997 Sun Microsystems, Inc. # Copyright (c) 1998 by Scriptics Corporation. # # See the file "license.terms" for information on usage and redistribution # of this file, and for a DISCLAIMER OF ALL WARRANTIES. # #------------------------------------------------------------------------- # Elements of tkPriv that are used in this file: # # afterId - If non-null, it means that auto-scanning is underway # and it gives the "after" id for the next auto-scan # command to be executed. # char - Character position on the line; kept in order # to allow moving up or down past short lines while # still remembering the desired position. # mouseMoved - Non-zero means the mouse has moved a significant # amount since the button went down (so, for example, # start dragging out a selection). # prevPos - Used when moving up or down lines via the keyboard. # Keeps track of the previous insert position, so # we can distinguish a series of ups and downs, all # in a row, from a new up or down. # selectMode - The style of selection currently underway: # char, word, or line. # x, y - Last known mouse coordinates for scanning # and auto-scanning. #------------------------------------------------------------------------- #------------------------------------------------------------------------- # The code below creates the default class bindings for entries. #------------------------------------------------------------------------- # Standard Motif bindings: bind Text <1> { tkTextButton1 %W %x %y %W tag remove sel 0.0 end } bind Text <B1-Motion> { set tkPriv(x) %x set tkPriv(y) %y tkTextSelectTo %W %x %y } bind Text <Double-1> { set tkPriv(selectMode) word tkTextSelectTo %W %x %y catch {%W mark set insert sel.last} catch {%W mark set anchor sel.first} } bind Text <Triple-1> { set tkPriv(selectMode) line tkTextSelectTo %W %x %y catch {%W mark set insert sel.last} catch {%W mark set anchor sel.first} } bind Text <Shift-1> { tkTextResetAnchor %W @%x,%y set tkPriv(selectMode) char tkTextSelectTo %W %x %y } bind Text <Double-Shift-1> { set tkPriv(selectMode) word tkTextSelectTo %W %x %y 1 } bind Text <Triple-Shift-1> { set tkPriv(selectMode) line tkTextSelectTo %W %x %y } bind Text <B1-Leave> { set tkPriv(x) %x set tkPriv(y) %y tkTextAutoScan %W } bind Text <B1-Enter> { tkCancelRepeat } bind Text <ButtonRelease-1> { tkCancelRepeat } bind Text <Control-1> { %W mark set insert @%x,%y } bind Text <Left> { tkTextSetCursor %W insert-1c } bind Text <Right> { tkTextSetCursor %W insert+1c } bind Text <Up> { tkTextSetCursor %W [tkTextUpDownLine %W -1] } bind Text <Down> { tkTextSetCursor %W [tkTextUpDownLine %W 1] } bind Text <Shift-Left> { tkTextKeySelect %W [%W index {insert - 1c}] } bind Text <Shift-Right> { tkTextKeySelect %W [%W index {insert + 1c}] } bind Text <Shift-Up> { tkTextKeySelect %W [tkTextUpDownLine %W -1] } bind Text <Shift-Down> { tkTextKeySelect %W [tkTextUpDownLine %W 1] } bind Text <Control-Left> { tkTextSetCursor %W [tkTextPrevPos %W insert tcl_startOfPreviousWord] } bind Text <Control-Right> { tkTextSetCursor %W [tkTextNextWord %W insert] } bind Text <Control-Up> { tkTextSetCursor %W [tkTextPrevPara %W insert] } bind Text <Control-Down> { tkTextSetCursor %W [tkTextNextPara %W insert] } bind Text <Shift-Control-Left> { tkTextKeySelect %W [tkTextPrevPos %W insert tcl_startOfPreviousWord] } bind Text <Shift-Control-Right> { tkTextKeySelect %W [tkTextNextWord %W insert] } bind Text <Shift-Control-Up> { tkTextKeySelect %W [tkTextPrevPara %W insert] } bind Text <Shift-Control-Down> { tkTextKeySelect %W [tkTextNextPara %W insert] } bind Text <Prior> { tkTextSetCursor %W [tkTextScrollPages %W -1] } bind Text <Shift-Prior> { tkTextKeySelect %W [tkTextScrollPages %W -1] } bind Text <Next> { tkTextSetCursor %W [tkTextScrollPages %W 1] } bind Text <Shift-Next> { tkTextKeySelect %W [tkTextScrollPages %W 1] } bind Text <Control-Prior> { %W xview scroll -1 page } bind Text <Control-Next> { %W xview scroll 1 page } bind Text <Home> { tkTextSetCursor %W {insert linestart} } bind Text <Shift-Home> { tkTextKeySelect %W {insert linestart} } bind Text <End> { tkTextSetCursor %W {insert lineend} } bind Text <Shift-End> { tkTextKeySelect %W {insert lineend} } bind Text <Control-Home> { tkTextSetCursor %W 1.0 } bind Text <Control-Shift-Home> { tkTextKeySelect %W 1.0 } bind Text <Control-End> { tkTextSetCursor %W {end - 1 char} } bind Text <Control-Shift-End> { tkTextKeySelect %W {end - 1 char} } bind Text <Tab> { tkTextInsert %W \t focus %W break } bind Text <Shift-Tab> { # Needed only to keep <Tab> binding from triggering; doesn't # have to actually do anything. break } bind Text <Control-Tab> { focus [tk_focusNext %W] } bind Text <Control-Shift-Tab> { focus [tk_focusPrev %W] } bind Text <Control-i> { tkTextInsert %W \t } bind Text <Return> { tkTextInsert %W \n } bind Text <Delete> { if {[string compare [%W tag nextrange sel 1.0 end] ""]} { %W delete sel.first sel.last } else { %W delete insert %W see insert } } bind Text <BackSpace> { if {[string compare [%W tag nextrange sel 1.0 end] ""]} { %W delete sel.first sel.last } elseif {[%W compare insert != 1.0]} { %W delete insert-1c %W see insert } } bind Text <Control-space> { %W mark set anchor insert } bind Text <Select> { %W mark set anchor insert } bind Text <Control-Shift-space> { set tkPriv(selectMode) char tkTextKeyExtend %W insert } bind Text <Shift-Select> { set tkPriv(selectMode) char tkTextKeyExtend %W insert } bind Text <Control-slash> { %W tag add sel 1.0 end } bind Text <Control-backslash> { %W tag remove sel 1.0 end } bind Text <<Cut>> { tk_textCut %W } bind Text <<Copy>> { tk_textCopy %W } bind Text <<Paste>> { tk_textPaste %W } bind Text <<Clear>> { catch {%W delete sel.first sel.last} } bind Text <<PasteSelection>> { if {!$tkPriv(mouseMoved) || $tk_strictMotif} { tkTextPaste %W %x %y } } bind Text <Insert> { catch {tkTextInsert %W [selection get -displayof %W]} } bind Text <KeyPress> { tkTextInsert %W %A } # Ignore all Alt, Meta, and Control keypresses unless explicitly bound. # Otherwise, if a widget binding for one of these is defined, the # <KeyPress> class binding will also fire and insert the character, # which is wrong. Ditto for <Escape>. bind Text <Alt-KeyPress> {# nothing } bind Text <Meta-KeyPress> {# nothing} bind Text <Control-KeyPress> {# nothing} bind Text <Escape> {# nothing} bind Text <KP_Enter> {# nothing} if {[string equal $tcl_platform(platform) "macintosh"]} { bind Text <Command-KeyPress> {# nothing} } # Additional emacs-like bindings: bind Text <Control-a> { if {!$tk_strictMotif} { tkTextSetCursor %W {insert linestart} } } bind Text <Control-b> { if {!$tk_strictMotif} { tkTextSetCursor %W insert-1c } } bind Text <Control-d> { if {!$tk_strictMotif} { %W delete insert } } bind Text <Control-e> { if {!$tk_strictMotif} { tkTextSetCursor %W {insert lineend} } } bind Text <Control-f> { if {!$tk_strictMotif} { tkTextSetCursor %W insert+1c } } bind Text <Control-k> { if {!$tk_strictMotif} { if {[%W compare insert == {insert lineend}]} { %W delete insert } else { %W delete insert {insert lineend} } } } bind Text <Control-n> { if {!$tk_strictMotif} { tkTextSetCursor %W [tkTextUpDownLine %W 1] } } bind Text <Control-o> { if {!$tk_strictMotif} { %W insert insert \n %W mark set insert insert-1c } } bind Text <Control-p> { if {!$tk_strictMotif} { tkTextSetCursor %W [tkTextUpDownLine %W -1] } } bind Text <Control-t> { if {!$tk_strictMotif} { tkTextTranspose %W } } if {[string compare $tcl_platform(platform) "windows"]} { bind Text <Control-v> { if {!$tk_strictMotif} { tkTextScrollPages %W 1 } } } bind Text <Meta-b> { if {!$tk_strictMotif} { tkTextSetCursor %W [tkTextPrevPos %W insert tcl_startOfPreviousWord] } } bind Text <Meta-d> { if {!$tk_strictMotif} { %W delete insert [tkTextNextWord %W insert] } } bind Text <Meta-f> { if {!$tk_strictMotif} { tkTextSetCursor %W [tkTextNextWord %W insert] } } bind Text <Meta-less> { if {!$tk_strictMotif} { tkTextSetCursor %W 1.0 } } bind Text <Meta-greater> { if {!$tk_strictMotif} { tkTextSetCursor %W end-1c } } bind Text <Meta-BackSpace> { if {!$tk_strictMotif} { %W delete [tkTextPrevPos %W insert tcl_startOfPreviousWord] insert } } bind Text <Meta-Delete> { if {!$tk_strictMotif} { %W delete [tkTextPrevPos %W insert tcl_startOfPreviousWord] insert } } # Macintosh only bindings: # if text black & highlight black -> text white, other text the same if {[string equal $tcl_platform(platform) "macintosh"]} { bind Text <FocusIn> { %W tag configure sel -borderwidth 0 %W configure -selectbackground systemHighlight -selectforeground systemHighlightText } bind Text <FocusOut> { %W tag configure sel -borderwidth 1 %W configure -selectbackground white -selectforeground black } bind Text <Option-Left> { tkTextSetCursor %W [tkTextPrevPos %W insert tcl_startOfPreviousWord] } bind Text <Option-Right> { tkTextSetCursor %W [tkTextNextWord %W insert] } bind Text <Option-Up> { tkTextSetCursor %W [tkTextPrevPara %W insert] } bind Text <Option-Down> { tkTextSetCursor %W [tkTextNextPara %W insert] } bind Text <Shift-Option-Left> { tkTextKeySelect %W [tkTextPrevPos %W insert tcl_startOfPreviousWord] } bind Text <Shift-Option-Right> { tkTextKeySelect %W [tkTextNextWord %W insert] } bind Text <Shift-Option-Up> { tkTextKeySelect %W [tkTextPrevPara %W insert] } bind Text <Shift-Option-Down> { tkTextKeySelect %W [tkTextNextPara %W insert] } # End of Mac only bindings } # A few additional bindings of my own. bind Text <Control-h> { if {!$tk_strictMotif} { if {[%W compare insert != 1.0]} { %W delete insert-1c %W see insert } } } bind Text <2> { if {!$tk_strictMotif} { %W scan mark %x %y set tkPriv(x) %x set tkPriv(y) %y set tkPriv(mouseMoved) 0 } } bind Text <B2-Motion> { if {!$tk_strictMotif} { if {(%x != $tkPriv(x)) || (%y != $tkPriv(y))} { set tkPriv(mouseMoved) 1 } if {$tkPriv(mouseMoved)} { %W scan dragto %x %y } } } set tkPriv(prevPos) {} # The MouseWheel will typically only fire on Windows. However, # someone could use the "event generate" command to produce one # on other platforms. bind Text <MouseWheel> { %W yview scroll [expr {- (%D / 120) * 4}] units } if {[string equal "unix" $tcl_platform(platform)]} { # Support for mousewheels on Linux/Unix commonly comes through mapping # the wheel to the extended buttons. If you have a mousewheel, find # Linux configuration info at: # http://www.inria.fr/koala/colas/mouse-wheel-scroll/ bind Text <4> { if {!$tk_strictMotif} { %W yview scroll -5 units } } bind Text <5> { if {!$tk_strictMotif} { %W yview scroll 5 units } } } # tkTextClosestGap -- # Given x and y coordinates, this procedure finds the closest boundary # between characters to the given coordinates and returns the index # of the character just after the boundary. # # Arguments: # w - The text window. # x - X-coordinate within the window. # y - Y-coordinate within the window. proc tkTextClosestGap {w x y} { set pos [$w index @$x,$y] set bbox [$w bbox $pos] if {[string equal $bbox ""]} { return $pos } if {($x - [lindex $bbox 0]) < ([lindex $bbox 2]/2)} { return $pos } $w index "$pos + 1 char" } # tkTextButton1 -- # This procedure is invoked to handle button-1 presses in text # widgets. It moves the insertion cursor, sets the selection anchor, # and claims the input focus. # # Arguments: # w - The text window in which the button was pressed. # x - The x-coordinate of the button press. # y - The x-coordinate of the button press. proc tkTextButton1 {w x y} { global tkPriv set tkPriv(selectMode) char set tkPriv(mouseMoved) 0 set tkPriv(pressX) $x $w mark set insert [tkTextClosestGap $w $x $y] $w mark set anchor insert if {[string equal [$w cget -state] "normal"]} {focus $w} } # tkTextSelectTo -- # This procedure is invoked to extend the selection, typically when # dragging it with the mouse. Depending on the selection mode (character, # word, line) it selects in different-sized units. This procedure # ignores mouse motions initially until the mouse has moved from # one character to another or until there have been multiple clicks. # # Arguments: # w - The text window in which the button was pressed. # x - Mouse x position. # y - Mouse y position. proc tkTextSelectTo {w x y {extend 0}} { global tkPriv tcl_platform set cur [tkTextClosestGap $w $x $y] if {[catch {$w index anchor}]} { $w mark set anchor $cur } set anchor [$w index anchor] if {[$w compare $cur != $anchor] || (abs($tkPriv(pressX) - $x) >= 3)} { set tkPriv(mouseMoved) 1 } switch $tkPriv(selectMode) { char { if {[$w compare $cur < anchor]} { set first $cur set last anchor } else { set first anchor set last $cur } } word { if {[$w compare $cur < anchor]} { set first [tkTextPrevPos $w "$cur + 1c" tcl_wordBreakBefore] if { !$extend } { set last [tkTextNextPos $w "anchor" tcl_wordBreakAfter] } else { set last anchor } } else { set last [tkTextNextPos $w "$cur - 1c" tcl_wordBreakAfter] if { !$extend } { set first [tkTextPrevPos $w anchor tcl_wordBreakBefore] } else { set first anchor } } } line { if {[$w compare $cur < anchor]} { set first [$w index "$cur linestart"] set last [$w index "anchor - 1c lineend + 1c"] } else { set first [$w index "anchor linestart"] set last [$w index "$cur lineend + 1c"] } } } if {$tkPriv(mouseMoved) || [string compare $tkPriv(selectMode) "char"]} { if {[string compare $tcl_platform(platform) "unix"] \ && [$w compare $cur < anchor]} { $w mark set insert $first } else { $w mark set insert $last } $w tag remove sel 0.0 $first $w tag add sel $first $last $w tag remove sel $last end update idletasks } } # tkTextKeyExtend -- # This procedure handles extending the selection from the keyboard, # where the point to extend to is really the boundary between two # characters rather than a particular character. # # Arguments: # w - The text window. # index - The point to which the selection is to be extended. proc tkTextKeyExtend {w index} { global tkPriv set cur [$w index $index] if {[catch {$w index anchor}]} { $w mark set anchor $cur } set anchor [$w index anchor] if {[$w compare $cur < anchor]} { set first $cur set last anchor } else { set first anchor set last $cur } $w tag remove sel 0.0 $first $w tag add sel $first $last $w tag remove sel $last end } # tkTextPaste -- # This procedure sets the insertion cursor to the mouse position, # inserts the selection, and sets the focus to the window. # # Arguments: # w - The text window. # x, y - Position of the mouse. proc tkTextPaste {w x y} { $w mark set insert [tkTextClosestGap $w $x $y] catch {$w insert insert [selection get -displayof $w]} if {[string equal [$w cget -state] "normal"]} {focus $w} } # tkTextAutoScan -- # This procedure is invoked when the mouse leaves a text window # with button 1 down. It scrolls the window up, down, left, or right, # depending on where the mouse is (this information was saved in # tkPriv(x) and tkPriv(y)), and reschedules itself as an "after" # command so that the window continues to scroll until the mouse # moves back into the window or the mouse button is released. # # Arguments: # w - The text window. proc tkTextAutoScan {w} { global tkPriv if {![winfo exists $w]} return if {$tkPriv(y) >= [winfo height $w]} { $w yview scroll 2 units } elseif {$tkPriv(y) < 0} { $w yview scroll -2 units } elseif {$tkPriv(x) >= [winfo width $w]} { $w xview scroll 2 units } elseif {$tkPriv(x) < 0} { $w xview scroll -2 units } else { return } tkTextSelectTo $w $tkPriv(x) $tkPriv(y) set tkPriv(afterId) [after 50 [list tkTextAutoScan $w]] } # tkTextSetCursor # Move the insertion cursor to a given position in a text. Also # clears the selection, if there is one in the text, and makes sure # that the insertion cursor is visible. Also, don't let the insertion # cursor appear on the dummy last line of the text. # # Arguments: # w - The text window. # pos - The desired new position for the cursor in the window. proc tkTextSetCursor {w pos} { global tkPriv if {[$w compare $pos == end]} { set pos {end - 1 chars} } $w mark set insert $pos $w tag remove sel 1.0 end $w see insert } # tkTextKeySelect # This procedure is invoked when stroking out selections using the # keyboard. It moves the cursor to a new position, then extends # the selection to that position. # # Arguments: # w - The text window. # new - A new position for the insertion cursor (the cursor hasn't # actually been moved to this position yet). proc tkTextKeySelect {w new} { global tkPriv if {[string equal [$w tag nextrange sel 1.0 end] ""]} { if {[$w compare $new < insert]} { $w tag add sel $new insert } else { $w tag add sel insert $new } $w mark set anchor insert } else { if {[$w compare $new < anchor]} { set first $new set last anchor } else { set first anchor set last $new } $w tag remove sel 1.0 $first $w tag add sel $first $last $w tag remove sel $last end } $w mark set insert $new $w see insert update idletasks } # tkTextResetAnchor -- # Set the selection anchor to whichever end is farthest from the # index argument. One special trick: if the selection has two or # fewer characters, just leave the anchor where it is. In this # case it doesn't matter which point gets chosen for the anchor, # and for the things like Shift-Left and Shift-Right this produces # better behavior when the cursor moves back and forth across the # anchor. # # Arguments: # w - The text widget. # index - Position at which mouse button was pressed, which determines # which end of selection should be used as anchor point. proc tkTextResetAnchor {w index} { global tkPriv if {[string equal [$w tag ranges sel] ""]} { $w mark set anchor $index return } set a [$w index $index] set b [$w index sel.first] set c [$w index sel.last] if {[$w compare $a < $b]} { $w mark set anchor sel.last return } if {[$w compare $a > $c]} { $w mark set anchor sel.first return } scan $a "%d.%d" lineA chA scan $b "%d.%d" lineB chB scan $c "%d.%d" lineC chC if {$lineB < $lineC+2} { set total [string length [$w get $b $c]] if {$total <= 2} { return } if {[string length [$w get $b $a]] < ($total/2)} { $w mark set anchor sel.last } else { $w mark set anchor sel.first } return } if {($lineA-$lineB) < ($lineC-$lineA)} { $w mark set anchor sel.last } else { $w mark set anchor sel.first } } # tkTextInsert -- # Insert a string into a text at the point of the insertion cursor. # If there is a selection in the text, and it covers the point of the # insertion cursor, then delete the selection before inserting. # # Arguments: # w - The text window in which to insert the string # s - The string to insert (usually just a single character) proc tkTextInsert {w s} { if {[string equal $s ""] || [string equal [$w cget -state] "disabled"]} { return } catch { if {[$w compare sel.first <= insert] \ && [$w compare sel.last >= insert]} { $w delete sel.first sel.last } } $w insert insert $s $w see insert } # tkTextUpDownLine -- # Returns the index of the character one line above or below the # insertion cursor. There are two tricky things here. First, # we want to maintain the original column across repeated operations, # even though some lines that will get passed through don't have # enough characters to cover the original column. Second, don't # try to scroll past the beginning or end of the text. # # Arguments: # w - The text window in which the cursor is to move. # n - The number of lines to move: -1 for up one line, # +1 for down one line. proc tkTextUpDownLine {w n} { global tkPriv set i [$w index insert] scan $i "%d.%d" line char if {[string compare $tkPriv(prevPos) $i]} { set tkPriv(char) $char } set new [$w index [expr {$line + $n}].$tkPriv(char)] if {[$w compare $new == end] || [$w compare $new == "insert linestart"]} { set new $i } set tkPriv(prevPos) $new return $new } # tkTextPrevPara -- # Returns the index of the beginning of the paragraph just before a given # position in the text (the beginning of a paragraph is the first non-blank # character after a blank line). # # Arguments: # w - The text window in which the cursor is to move. # pos - Position at which to start search. proc tkTextPrevPara {w pos} { set pos [$w index "$pos linestart"] while {1} { if {([string equal [$w get "$pos - 1 line"] "\n"] \ && [string compare [$w get $pos] "\n"]) \ || [string equal $pos "1.0"]} { if {[regexp -indices {^[ ]+(.)} [$w get $pos "$pos lineend"] \ dummy index]} { set pos [$w index "$pos + [lindex $index 0] chars"] } if {[$w compare $pos != insert] || [string equal $pos 1.0]} { return $pos } } set pos [$w index "$pos - 1 line"] } } # tkTextNextPara -- # Returns the index of the beginning of the paragraph just after a given # position in the text (the beginning of a paragraph is the first non-blank # character after a blank line). # # Arguments: # w - The text window in which the cursor is to move. # start - Position at which to start search. proc tkTextNextPara {w start} { set pos [$w index "$start linestart + 1 line"] while {[string compare [$w get $pos] "\n"]} { if {[$w compare $pos == end]} { return [$w index "end - 1c"] } set pos [$w index "$pos + 1 line"] } while {[string equal [$w get $pos] "\n"]} { set pos [$w index "$pos + 1 line"] if {[$w compare $pos == end]} { return [$w index "end - 1c"] } } if {[regexp -indices {^[ ]+(.)} [$w get $pos "$pos lineend"] \ dummy index]} { return [$w index "$pos + [lindex $index 0] chars"] } return $pos } # tkTextScrollPages -- # This is a utility procedure used in bindings for moving up and down # pages and possibly extending the selection along the way. It scrolls # the view in the widget by the number of pages, and it returns the # index of the character that is at the same position in the new view # as the insertion cursor used to be in the old view. # # Arguments: # w - The text window in which the cursor is to move. # count - Number of pages forward to scroll; may be negative # to scroll backwards. proc tkTextScrollPages {w count} { set bbox [$w bbox insert] $w yview scroll $count pages if {[string equal $bbox ""]} { return [$w index @[expr {[winfo height $w]/2}],0] } return [$w index @[lindex $bbox 0],[lindex $bbox 1]] } # tkTextTranspose -- # This procedure implements the "transpose" function for text widgets. # It tranposes the characters on either side of the insertion cursor, # unless the cursor is at the end of the line. In this case it # transposes the two characters to the left of the cursor. In either # case, the cursor ends up to the right of the transposed characters. # # Arguments: # w - Text window in which to transpose. proc tkTextTranspose w { set pos insert if {[$w compare $pos != "$pos lineend"]} { set pos [$w index "$pos + 1 char"] } set new [$w get "$pos - 1 char"][$w get "$pos - 2 char"] if {[$w compare "$pos - 1 char" == 1.0]} { return } $w delete "$pos - 2 char" $pos $w insert insert $new $w see insert } # tk_textCopy -- # This procedure copies the selection from a text widget into the # clipboard. # # Arguments: # w - Name of a text widget. proc tk_textCopy w { if {![catch {set data [$w get sel.first sel.last]}]} { clipboard clear -displayof $w clipboard append -displayof $w $data } } # tk_textCut -- # This procedure copies the selection from a text widget into the # clipboard, then deletes the selection (if it exists in the given # widget). # # Arguments: # w - Name of a text widget. proc tk_textCut w { if {![catch {set data [$w get sel.first sel.last]}]} { clipboard clear -displayof $w clipboard append -displayof $w $data $w delete sel.first sel.last } } # tk_textPaste -- # This procedure pastes the contents of the clipboard to the insertion # point in a text widget. # # Arguments: # w - Name of a text widget. proc tk_textPaste w { global tcl_platform catch { if {[string compare $tcl_platform(platform) "unix"]} { catch { $w delete sel.first sel.last } } $w insert insert [selection get -displayof $w -selection CLIPBOARD] } } # tkTextNextWord -- # Returns the index of the next word position after a given position in the # text. The next word is platform dependent and may be either the next # end-of-word position or the next start-of-word position after the next # end-of-word position. # # Arguments: # w - The text window in which the cursor is to move. # start - Position at which to start search. if {[string equal $tcl_platform(platform) "windows"]} { proc tkTextNextWord {w start} { tkTextNextPos $w [tkTextNextPos $w $start tcl_endOfWord] \ tcl_startOfNextWord } } else { proc tkTextNextWord {w start} { tkTextNextPos $w $start tcl_endOfWord } } # tkTextNextPos -- # Returns the index of the next position after the given starting # position in the text as computed by a specified function. # # Arguments: # w - The text window in which the cursor is to move. # start - Position at which to start search. # op - Function to use to find next position. proc tkTextNextPos {w start op} { set text "" set cur $start while {[$w compare $cur < end]} { set text $text[$w get $cur "$cur lineend + 1c"] set pos [$op $text 0] if {$pos >= 0} { ## Adjust for embedded windows and images ## dump gives us 3 items per window/image set dump [$w dump -image -window $start "$start + $pos c"] if {[llength $dump]} { set pos [expr {$pos + ([llength $dump]/3)}] } return [$w index "$start + $pos c"] } set cur [$w index "$cur lineend +1c"] } return end } # tkTextPrevPos -- # Returns the index of the previous position before the given starting # position in the text as computed by a specified function. # # Arguments: # w - The text window in which the cursor is to move. # start - Position at which to start search. # op - Function to use to find next position. proc tkTextPrevPos {w start op} { set text "" set cur $start while {[$w compare $cur > 0.0]} { set text [$w get "$cur linestart - 1c" $cur]$text set pos [$op $text end] if {$pos >= 0} { ## Adjust for embedded windows and images ## dump gives us 3 items per window/image set dump [$w dump -image -window "$cur linestart" "$start - 1c"] if {[llength $dump]} { ## This is a hokey extra hack for control-arrow movement ## that should be in a while loop to be correct (hobbs) if {[$w compare [lindex $dump 2] > \ "$cur linestart - 1c + $pos c"]} { incr pos -1 } set pos [expr {$pos + ([llength $dump]/3)}] } return [$w index "$cur linestart - 1c + $pos c"] } set cur [$w index "$cur linestart - 1c"] } return 0.0 }