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654 lines
17 KiB
654 lines
17 KiB
# entry.tcl --
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#
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# This file defines the default bindings for Tk entry widgets and provides
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# procedures that help in implementing those bindings.
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#
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# Copyright (c) 1992-1994 The Regents of the University of California.
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# Copyright (c) 1994-1997 Sun Microsystems, Inc.
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#
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# See the file "license.terms" for information on usage and redistribution
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# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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#-------------------------------------------------------------------------
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# Elements of tk::Priv that are used in this file:
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#
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# afterId - If non-null, it means that auto-scanning is underway
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# and it gives the "after" id for the next auto-scan
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# command to be executed.
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# mouseMoved - Non-zero means the mouse has moved a significant
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# amount since the button went down (so, for example,
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# start dragging out a selection).
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# pressX - X-coordinate at which the mouse button was pressed.
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# selectMode - The style of selection currently underway:
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# char, word, or line.
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# x, y - Last known mouse coordinates for scanning
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# and auto-scanning.
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# data - Used for Cut and Copy
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#-------------------------------------------------------------------------
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#-------------------------------------------------------------------------
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# The code below creates the default class bindings for entries.
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#-------------------------------------------------------------------------
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bind Entry <<Cut>> {
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if {![catch {tk::EntryGetSelection %W} tk::Priv(data)]} {
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clipboard clear -displayof %W
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clipboard append -displayof %W $tk::Priv(data)
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%W delete sel.first sel.last
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unset tk::Priv(data)
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}
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}
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bind Entry <<Copy>> {
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if {![catch {tk::EntryGetSelection %W} tk::Priv(data)]} {
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clipboard clear -displayof %W
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clipboard append -displayof %W $tk::Priv(data)
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unset tk::Priv(data)
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}
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}
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bind Entry <<Paste>> {
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catch {
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if {[tk windowingsystem] ne "x11"} {
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catch {
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%W delete sel.first sel.last
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}
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}
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%W insert insert [::tk::GetSelection %W CLIPBOARD]
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tk::EntrySeeInsert %W
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}
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}
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bind Entry <<Clear>> {
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# ignore if there is no selection
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catch { %W delete sel.first sel.last }
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}
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bind Entry <<PasteSelection>> {
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if {$tk_strictMotif || ![info exists tk::Priv(mouseMoved)]
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|| !$tk::Priv(mouseMoved)} {
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tk::EntryPaste %W %x
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}
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}
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bind Entry <<TraverseIn>> {
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%W selection range 0 end
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%W icursor end
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}
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# Standard Motif bindings:
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bind Entry <1> {
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tk::EntryButton1 %W %x
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%W selection clear
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}
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bind Entry <B1-Motion> {
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set tk::Priv(x) %x
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tk::EntryMouseSelect %W %x
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}
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bind Entry <Double-1> {
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set tk::Priv(selectMode) word
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tk::EntryMouseSelect %W %x
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catch {%W icursor sel.last}
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}
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bind Entry <Triple-1> {
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set tk::Priv(selectMode) line
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tk::EntryMouseSelect %W %x
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catch {%W icursor sel.last}
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}
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bind Entry <Shift-1> {
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set tk::Priv(selectMode) char
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%W selection adjust @%x
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}
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bind Entry <Double-Shift-1> {
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set tk::Priv(selectMode) word
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tk::EntryMouseSelect %W %x
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}
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bind Entry <Triple-Shift-1> {
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set tk::Priv(selectMode) line
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tk::EntryMouseSelect %W %x
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}
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bind Entry <B1-Leave> {
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set tk::Priv(x) %x
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tk::EntryAutoScan %W
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}
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bind Entry <B1-Enter> {
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tk::CancelRepeat
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}
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bind Entry <ButtonRelease-1> {
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tk::CancelRepeat
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}
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bind Entry <Control-1> {
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%W icursor @%x
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}
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bind Entry <<PrevChar>> {
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tk::EntrySetCursor %W [expr {[%W index insert] - 1}]
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}
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bind Entry <<NextChar>> {
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tk::EntrySetCursor %W [expr {[%W index insert] + 1}]
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}
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bind Entry <<SelectPrevChar>> {
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tk::EntryKeySelect %W [expr {[%W index insert] - 1}]
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tk::EntrySeeInsert %W
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}
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bind Entry <<SelectNextChar>> {
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tk::EntryKeySelect %W [expr {[%W index insert] + 1}]
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tk::EntrySeeInsert %W
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}
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bind Entry <<PrevWord>> {
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tk::EntrySetCursor %W [tk::EntryPreviousWord %W insert]
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}
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bind Entry <<NextWord>> {
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tk::EntrySetCursor %W [tk::EntryNextWord %W insert]
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}
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bind Entry <<SelectPrevWord>> {
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tk::EntryKeySelect %W [tk::EntryPreviousWord %W insert]
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tk::EntrySeeInsert %W
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}
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bind Entry <<SelectNextWord>> {
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tk::EntryKeySelect %W [tk::EntryNextWord %W insert]
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tk::EntrySeeInsert %W
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}
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bind Entry <<LineStart>> {
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tk::EntrySetCursor %W 0
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}
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bind Entry <<SelectLineStart>> {
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tk::EntryKeySelect %W 0
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tk::EntrySeeInsert %W
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}
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bind Entry <<LineEnd>> {
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tk::EntrySetCursor %W end
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}
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bind Entry <<SelectLineEnd>> {
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tk::EntryKeySelect %W end
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tk::EntrySeeInsert %W
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}
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bind Entry <Delete> {
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if {[%W selection present]} {
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%W delete sel.first sel.last
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} else {
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%W delete insert
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}
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}
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bind Entry <BackSpace> {
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tk::EntryBackspace %W
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}
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bind Entry <Control-space> {
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%W selection from insert
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}
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bind Entry <Select> {
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%W selection from insert
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}
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bind Entry <Control-Shift-space> {
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%W selection adjust insert
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}
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bind Entry <Shift-Select> {
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%W selection adjust insert
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}
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bind Entry <<SelectAll>> {
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%W selection range 0 end
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}
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bind Entry <<SelectNone>> {
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%W selection clear
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}
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bind Entry <KeyPress> {
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tk::CancelRepeat
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tk::EntryInsert %W %A
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}
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# Ignore all Alt, Meta, and Control keypresses unless explicitly bound.
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# Otherwise, if a widget binding for one of these is defined, the
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# <KeyPress> class binding will also fire and insert the character,
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# which is wrong. Ditto for Escape, Return, and Tab.
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bind Entry <Alt-KeyPress> {# nothing}
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bind Entry <Meta-KeyPress> {# nothing}
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bind Entry <Control-KeyPress> {# nothing}
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bind Entry <Escape> {# nothing}
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bind Entry <Return> {# nothing}
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bind Entry <KP_Enter> {# nothing}
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bind Entry <Tab> {# nothing}
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bind Entry <Prior> {# nothing}
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bind Entry <Next> {# nothing}
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if {[tk windowingsystem] eq "aqua"} {
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bind Entry <Command-KeyPress> {# nothing}
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}
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# Tk-on-Cocoa generates characters for these two keys. [Bug 2971663]
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bind Entry <<NextLine>> {# nothing}
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bind Entry <<PrevLine>> {# nothing}
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# On Windows, paste is done using Shift-Insert. Shift-Insert already
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# generates the <<Paste>> event, so we don't need to do anything here.
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if {[tk windowingsystem] ne "win32"} {
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bind Entry <Insert> {
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catch {tk::EntryInsert %W [::tk::GetSelection %W PRIMARY]}
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}
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}
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# Additional emacs-like bindings:
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bind Entry <Control-d> {
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if {!$tk_strictMotif} {
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%W delete insert
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}
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}
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bind Entry <Control-h> {
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if {!$tk_strictMotif} {
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tk::EntryBackspace %W
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}
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}
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bind Entry <Control-k> {
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if {!$tk_strictMotif} {
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%W delete insert end
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}
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}
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bind Entry <Control-t> {
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if {!$tk_strictMotif} {
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tk::EntryTranspose %W
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}
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}
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bind Entry <Meta-b> {
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if {!$tk_strictMotif} {
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tk::EntrySetCursor %W [tk::EntryPreviousWord %W insert]
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}
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}
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bind Entry <Meta-d> {
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if {!$tk_strictMotif} {
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%W delete insert [tk::EntryNextWord %W insert]
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}
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}
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bind Entry <Meta-f> {
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if {!$tk_strictMotif} {
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tk::EntrySetCursor %W [tk::EntryNextWord %W insert]
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}
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}
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bind Entry <Meta-BackSpace> {
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if {!$tk_strictMotif} {
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%W delete [tk::EntryPreviousWord %W insert] insert
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}
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}
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bind Entry <Meta-Delete> {
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if {!$tk_strictMotif} {
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%W delete [tk::EntryPreviousWord %W insert] insert
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}
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}
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# A few additional bindings of my own.
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bind Entry <2> {
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if {!$tk_strictMotif} {
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::tk::EntryScanMark %W %x
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}
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}
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bind Entry <B2-Motion> {
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if {!$tk_strictMotif} {
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::tk::EntryScanDrag %W %x
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}
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}
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# ::tk::EntryClosestGap --
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# Given x and y coordinates, this procedure finds the closest boundary
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# between characters to the given coordinates and returns the index
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# of the character just after the boundary.
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#
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# Arguments:
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# w - The entry window.
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# x - X-coordinate within the window.
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proc ::tk::EntryClosestGap {w x} {
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set pos [$w index @$x]
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set bbox [$w bbox $pos]
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if {($x - [lindex $bbox 0]) < ([lindex $bbox 2]/2)} {
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return $pos
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}
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incr pos
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}
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# ::tk::EntryButton1 --
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# This procedure is invoked to handle button-1 presses in entry
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# widgets. It moves the insertion cursor, sets the selection anchor,
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# and claims the input focus.
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#
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# Arguments:
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# w - The entry window in which the button was pressed.
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# x - The x-coordinate of the button press.
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proc ::tk::EntryButton1 {w x} {
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variable ::tk::Priv
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set Priv(selectMode) char
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set Priv(mouseMoved) 0
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set Priv(pressX) $x
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$w icursor [EntryClosestGap $w $x]
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$w selection from insert
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if {"disabled" ne [$w cget -state]} {
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focus $w
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}
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}
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# ::tk::EntryMouseSelect --
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# This procedure is invoked when dragging out a selection with
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# the mouse. Depending on the selection mode (character, word,
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# line) it selects in different-sized units. This procedure
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# ignores mouse motions initially until the mouse has moved from
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# one character to another or until there have been multiple clicks.
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#
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# Arguments:
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# w - The entry window in which the button was pressed.
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# x - The x-coordinate of the mouse.
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proc ::tk::EntryMouseSelect {w x} {
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variable ::tk::Priv
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set cur [EntryClosestGap $w $x]
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set anchor [$w index anchor]
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if {($cur != $anchor) || (abs($Priv(pressX) - $x) >= 3)} {
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set Priv(mouseMoved) 1
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}
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switch $Priv(selectMode) {
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char {
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if {$Priv(mouseMoved)} {
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if {$cur < $anchor} {
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$w selection range $cur $anchor
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} elseif {$cur > $anchor} {
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$w selection range $anchor $cur
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} else {
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$w selection clear
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}
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}
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}
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word {
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if {$cur < $anchor} {
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set before [tcl_wordBreakBefore [$w get] $cur]
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set after [tcl_wordBreakAfter [$w get] [expr {$anchor-1}]]
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} elseif {$cur > $anchor} {
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set before [tcl_wordBreakBefore [$w get] $anchor]
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set after [tcl_wordBreakAfter [$w get] [expr {$cur - 1}]]
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} else {
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if {[$w index @$Priv(pressX)] < $anchor} {
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incr anchor -1
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}
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set before [tcl_wordBreakBefore [$w get] $anchor]
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set after [tcl_wordBreakAfter [$w get] $anchor]
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}
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if {$before < 0} {
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set before 0
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}
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if {$after < 0} {
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set after end
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}
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$w selection range $before $after
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}
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line {
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$w selection range 0 end
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}
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}
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if {$Priv(mouseMoved)} {
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$w icursor $cur
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}
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update idletasks
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}
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# ::tk::EntryPaste --
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# This procedure sets the insertion cursor to the current mouse position,
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# pastes the selection there, and sets the focus to the window.
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#
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# Arguments:
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# w - The entry window.
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# x - X position of the mouse.
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proc ::tk::EntryPaste {w x} {
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$w icursor [EntryClosestGap $w $x]
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catch {$w insert insert [::tk::GetSelection $w PRIMARY]}
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if {"disabled" ne [$w cget -state]} {
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focus $w
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}
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}
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# ::tk::EntryAutoScan --
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# This procedure is invoked when the mouse leaves an entry window
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# with button 1 down. It scrolls the window left or right,
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# depending on where the mouse is, and reschedules itself as an
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# "after" command so that the window continues to scroll until the
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# mouse moves back into the window or the mouse button is released.
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#
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# Arguments:
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# w - The entry window.
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proc ::tk::EntryAutoScan {w} {
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variable ::tk::Priv
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set x $Priv(x)
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if {![winfo exists $w]} {
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return
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}
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if {$x >= [winfo width $w]} {
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$w xview scroll 2 units
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EntryMouseSelect $w $x
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} elseif {$x < 0} {
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$w xview scroll -2 units
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EntryMouseSelect $w $x
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}
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set Priv(afterId) [after 50 [list tk::EntryAutoScan $w]]
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}
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# ::tk::EntryKeySelect --
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# This procedure is invoked when stroking out selections using the
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# keyboard. It moves the cursor to a new position, then extends
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# the selection to that position.
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#
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# Arguments:
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# w - The entry window.
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# new - A new position for the insertion cursor (the cursor hasn't
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# actually been moved to this position yet).
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proc ::tk::EntryKeySelect {w new} {
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if {![$w selection present]} {
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$w selection from insert
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$w selection to $new
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} else {
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$w selection adjust $new
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}
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$w icursor $new
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}
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# ::tk::EntryInsert --
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# Insert a string into an entry at the point of the insertion cursor.
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# If there is a selection in the entry, and it covers the point of the
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# insertion cursor, then delete the selection before inserting.
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#
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# Arguments:
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# w - The entry window in which to insert the string
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# s - The string to insert (usually just a single character)
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proc ::tk::EntryInsert {w s} {
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if {$s eq ""} {
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return
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}
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catch {
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set insert [$w index insert]
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if {([$w index sel.first] <= $insert)
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&& ([$w index sel.last] >= $insert)} {
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$w delete sel.first sel.last
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}
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}
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$w insert insert $s
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EntrySeeInsert $w
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}
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# ::tk::EntryBackspace --
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# Backspace over the character just before the insertion cursor.
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# If backspacing would move the cursor off the left edge of the
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# window, reposition the cursor at about the middle of the window.
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#
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# Arguments:
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# w - The entry window in which to backspace.
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proc ::tk::EntryBackspace w {
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if {[$w selection present]} {
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$w delete sel.first sel.last
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} else {
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set x [expr {[$w index insert] - 1}]
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if {$x >= 0} {
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$w delete $x
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}
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if {[$w index @0] >= [$w index insert]} {
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set range [$w xview]
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set left [lindex $range 0]
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set right [lindex $range 1]
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$w xview moveto [expr {$left - ($right - $left)/2.0}]
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}
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}
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}
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# ::tk::EntrySeeInsert --
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# Make sure that the insertion cursor is visible in the entry window.
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# If not, adjust the view so that it is.
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#
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# Arguments:
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# w - The entry window.
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proc ::tk::EntrySeeInsert w {
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set c [$w index insert]
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if {($c < [$w index @0]) || ($c > [$w index @[winfo width $w]])} {
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$w xview $c
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}
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}
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# ::tk::EntrySetCursor -
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# Move the insertion cursor to a given position in an entry. Also
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# clears the selection, if there is one in the entry, and makes sure
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# that the insertion cursor is visible.
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#
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# Arguments:
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# w - The entry window.
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# pos - The desired new position for the cursor in the window.
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proc ::tk::EntrySetCursor {w pos} {
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$w icursor $pos
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$w selection clear
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EntrySeeInsert $w
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}
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# ::tk::EntryTranspose -
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# This procedure implements the "transpose" function for entry widgets.
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# It tranposes the characters on either side of the insertion cursor,
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# unless the cursor is at the end of the line. In this case it
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# transposes the two characters to the left of the cursor. In either
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# case, the cursor ends up to the right of the transposed characters.
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#
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# Arguments:
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# w - The entry window.
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proc ::tk::EntryTranspose w {
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set i [$w index insert]
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if {$i < [$w index end]} {
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incr i
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}
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set first [expr {$i-2}]
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if {$first < 0} {
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|
return
|
|
}
|
|
set data [$w get]
|
|
set new [string index $data [expr {$i-1}]][string index $data $first]
|
|
$w delete $first $i
|
|
$w insert insert $new
|
|
EntrySeeInsert $w
|
|
}
|
|
|
|
# ::tk::EntryNextWord --
|
|
# Returns the index of the next word position after a given position in the
|
|
# entry. The next word is platform dependent and may be either the next
|
|
# end-of-word position or the next start-of-word position after the next
|
|
# end-of-word position.
|
|
#
|
|
# Arguments:
|
|
# w - The entry window in which the cursor is to move.
|
|
# start - Position at which to start search.
|
|
|
|
if {[tk windowingsystem] eq "win32"} {
|
|
proc ::tk::EntryNextWord {w start} {
|
|
set pos [tcl_endOfWord [$w get] [$w index $start]]
|
|
if {$pos >= 0} {
|
|
set pos [tcl_startOfNextWord [$w get] $pos]
|
|
}
|
|
if {$pos < 0} {
|
|
return end
|
|
}
|
|
return $pos
|
|
}
|
|
} else {
|
|
proc ::tk::EntryNextWord {w start} {
|
|
set pos [tcl_endOfWord [$w get] [$w index $start]]
|
|
if {$pos < 0} {
|
|
return end
|
|
}
|
|
return $pos
|
|
}
|
|
}
|
|
|
|
# ::tk::EntryPreviousWord --
|
|
#
|
|
# Returns the index of the previous word position before a given
|
|
# position in the entry.
|
|
#
|
|
# Arguments:
|
|
# w - The entry window in which the cursor is to move.
|
|
# start - Position at which to start search.
|
|
|
|
proc ::tk::EntryPreviousWord {w start} {
|
|
set pos [tcl_startOfPreviousWord [$w get] [$w index $start]]
|
|
if {$pos < 0} {
|
|
return 0
|
|
}
|
|
return $pos
|
|
}
|
|
|
|
# ::tk::EntryScanMark --
|
|
#
|
|
# Marks the start of a possible scan drag operation
|
|
#
|
|
# Arguments:
|
|
# w - The entry window from which the text to get
|
|
# x - x location on screen
|
|
|
|
proc ::tk::EntryScanMark {w x} {
|
|
$w scan mark $x
|
|
set ::tk::Priv(x) $x
|
|
set ::tk::Priv(y) 0 ; # not used
|
|
set ::tk::Priv(mouseMoved) 0
|
|
}
|
|
|
|
# ::tk::EntryScanDrag --
|
|
#
|
|
# Marks the start of a possible scan drag operation
|
|
#
|
|
# Arguments:
|
|
# w - The entry window from which the text to get
|
|
# x - x location on screen
|
|
|
|
proc ::tk::EntryScanDrag {w x} {
|
|
# Make sure these exist, as some weird situations can trigger the
|
|
# motion binding without the initial press. [Bug #220269]
|
|
if {![info exists ::tk::Priv(x)]} { set ::tk::Priv(x) $x }
|
|
# allow for a delta
|
|
if {abs($x-$::tk::Priv(x)) > 2} {
|
|
set ::tk::Priv(mouseMoved) 1
|
|
}
|
|
$w scan dragto $x
|
|
}
|
|
|
|
# ::tk::EntryGetSelection --
|
|
#
|
|
# Returns the selected text of the entry with respect to the -show option.
|
|
#
|
|
# Arguments:
|
|
# w - The entry window from which the text to get
|
|
|
|
proc ::tk::EntryGetSelection {w} {
|
|
set entryString [string range [$w get] [$w index sel.first] \
|
|
[expr {[$w index sel.last] - 1}]]
|
|
if {[$w cget -show] ne ""} {
|
|
return [string repeat [string index [$w cget -show] 0] \
|
|
[string length $entryString]]
|
|
}
|
|
return $entryString
|
|
}
|
|
|