| 1 | REBOL [
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| 2 | Title: "RebGUI edit feel"
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| 3 | Owner: "Ashley G. Trüter"
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| 4 | Purpose: "Edit support for RebGUI widgets."
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| 5 | Acknowledgements: {
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| 6 | Edit functionality based on the work of Carl Sassenrath (%view-edit.r SDK source)
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| 7 | Undo / Redo based on the work of Romano Paolo Tenca http://www.rebol.it/~romano/edit-text-undo.txt
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| 8 | Soundex function derived from Allen Kamp's http:ne//www.rebol.org/library/scripts-download/soundex.r
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| 9 | Dictionaries sourced from AbiWord http://www.abisource.com/downloads/dictionaries/Windows/
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| 10 | Spell-check based on code in this thread: http://www.rebol.org/ml-display-thread.r?m=rmlNYQC
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| 11 | }
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| 12 | History: {
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| 13 | 25 Reinstated rev#19-20 changes lost in rev#21
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| 14 | 26 Added Ctrl-Enter hard tab support
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| 15 | 27 process-keystroke fix (Volker)
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| 16 | 39 Spell-check restores focal-face
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| 17 | 48 Incorporated Cyphre's changes
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| 18 | 49 Added support for new spinner widget
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| 19 | 50 alt-down support for area (Graham)
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| 20 | 51 Added references to behaviors/*
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| 21 | 52 Added action-on-tab (Graham)
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| 22 | 58 tab-on-enter now fires after next-field calc (to avoid conflict with show-focus)
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| 23 | into-widget now handles tab-panel correctly
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| 24 | 65 Cleaned up comments
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| 25 | Spell-check creates %dictionary/ if not present
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| 26 | 66 Renamed focus to show-focus and moved to %rebgui-functions.r
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| 27 | 72 spellcheck moved to %rebgui-functions.r
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| 28 | 78 Replaced soundex with new language-neutral algorithm
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| 29 | 81 Wrapped current-word and edit-text caret handling in a gui-error/continue block
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| 30 | 88 Fixed nasty long-standing focus bug in feel/engage/down (related to changing focus with mouse)
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| 31 | 93 Added on-edit handler
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| 32 | 94 Changed on-alt-click to trigger on 'alt-up
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| 33 | }
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| 34 | ]
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| 35 |
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| 36 | edit: make object! [
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| 37 |
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| 38 | siblings: none
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| 39 | caret: none
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| 40 |
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| 41 | letter: make bitset! [#"A" - #"Z" #"a" - #"z" #"'"]
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| 42 | capital: make bitset! [#"A" - #"Z"]
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| 43 | other: negate letter
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| 44 |
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| 45 | ;
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| 46 | ; --- Spellcheck ---
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| 47 | ;
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| 48 |
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| 49 | edits: make function! [
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| 50 | words [block!]
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| 51 | /local result ln w
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| 52 | ][
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| 53 | result: copy []
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| 54 | foreach word words [
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| 55 | ; deletion
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| 56 | repeat n ln: length? word [
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| 57 | insert tail result head remove at copy word n
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| 58 | ]
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| 59 | ; transposition
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| 60 | repeat n ln - 1 [
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| 61 | insert tail result head change change at copy word n pick word n + 1 pick word n
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| 62 | ]
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| 63 | foreach ch "abcdefghijklmnopqrstuvwxyz" [
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| 64 | ; alteration
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| 65 | repeat n ln [
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| 66 | poke w: copy word n ch
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| 67 | insert tail result w
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| 68 | ]
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| 69 | ; insertion
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| 70 | repeat n ln + 1 [
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| 71 | insert tail result head insert at copy word n ch
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| 72 | ]
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| 73 | ]
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| 74 | ]
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| 75 | result
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| 76 | ]
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| 77 |
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| 78 | lookup-word: make function! [
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| 79 | word [string!]
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| 80 | /local result
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| 81 | ][
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| 82 | any [
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| 83 | not empty? result: intersect locale*/dict make hash! word: reduce [word]
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| 84 | not empty? result: intersect locale*/dict make hash! edits word
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| 85 | result: word
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| 86 | ]
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| 87 | sort result
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| 88 | ]
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| 89 |
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| 90 | ;
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| 91 | ; --- Edit ---
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| 92 | ;
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| 93 |
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| 94 | insert?: true
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| 95 |
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| 96 | keymap: [
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| 97 | #"^H" back-char
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| 98 | #"^~" del-char
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| 99 | #"^M" enter
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| 100 | #"^A" all-text
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| 101 | #"^C" copy-text
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| 102 | #"^X" cut-text
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| 103 | #"^V" paste-text
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| 104 | #"^T" clear-tail
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| 105 | #"^Z" undo
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| 106 | #"^Y" redo
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| 107 | #"^[" undo-all
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| 108 | #"^S" spellcheck
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| 109 | #"^/" ctrl-enter
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| 110 | ]
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| 111 |
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| 112 | ; Text highlight functions (but, do not reshow the face)
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| 113 |
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| 114 | hilight-text: make function! [start end][
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| 115 | view*/highlight-start: start
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| 116 | view*/highlight-end: end
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| 117 | ]
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| 118 |
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| 119 | hilight-all: make function! [face] [
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| 120 | either empty? face/text [unlight-text] [
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| 121 | view*/highlight-start: head face/text
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| 122 | view*/highlight-end: tail face/text
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| 123 | ]
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| 124 | ]
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| 125 |
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| 126 | unlight-text: make function! [] [
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| 127 | view*/highlight-start: view*/highlight-end: none
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| 128 | ]
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| 129 |
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| 130 | hilight?: make function! [] [
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| 131 | all [
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| 132 | object? view*/focal-face
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| 133 | string? view*/highlight-start
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| 134 | string? view*/highlight-end
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| 135 | not zero? offset? view*/highlight-end view*/highlight-start
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| 136 | ]
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| 137 | ]
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| 138 |
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| 139 | hilight-range?: make function! [/local start end] [
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| 140 | start: view*/highlight-start
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| 141 | end: view*/highlight-end
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| 142 | if negative? offset? start end [start: end end: view*/highlight-start]
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| 143 | reduce [start end]
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| 144 | ]
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| 145 |
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| 146 | ; Text focus functions
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| 147 |
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| 148 | tabbed?: make function! [ ; Returns TRUE if a widget can be tabbed to.
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| 149 | face [object!]
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| 150 | ] [
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| 151 | all [
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| 152 | face/show?
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| 153 | find behaviors/tabbed face/type
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| 154 | not find face/options 'info
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| 155 | face
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| 156 | ]
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| 157 | ]
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| 158 |
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| 159 | cyclic?: make function! [ ; Returns TRUE if a face sets up it's own closed tab cycle.
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| 160 | face [object!]
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| 161 | ] [
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| 162 | all [find behaviors/cyclic face/type face]
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| 163 | ]
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| 164 |
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| 165 | unfocus: make function! [/local face] [
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| 166 | if face: view*/focal-face [
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| 167 | if all [face/type <> 'face get in face/action 'on-unfocus] [
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| 168 | unless face/action/on-unfocus face [return false]
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| 169 | ]
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| 170 | all [
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| 171 | view*/caret
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| 172 | in face 'caret
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| 173 | face/caret: index? view*/caret
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| 174 | ]
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| 175 | all [
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| 176 | face/type = 'button
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| 177 | face/feel/over face false none
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| 178 | ]
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| 179 | ]
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| 180 | view*/focal-face: view*/caret: none
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| 181 | unlight-text
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| 182 | all [face show face]
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| 183 | true
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| 184 | ]
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| 185 |
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| 186 | ; Copy and delete functions
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| 187 |
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| 188 | copy-selected-text: make function! [/local start end][
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| 189 | if hilight? [
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| 190 | set [start end] hilight-range?
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| 191 | write clipboard:// copy/part start end
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| 192 | true
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| 193 | ] ; else return false
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| 194 | ]
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| 195 |
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| 196 | delete-selected-text: make function! [/local start end] [
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| 197 | if hilight? [
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| 198 | set [start end] hilight-range?
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| 199 | remove/part start end
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| 200 | view*/caret: start
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| 201 | view*/focal-face/line-list: none
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| 202 | unlight-text
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| 203 | true
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| 204 | ] ; else return false
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| 205 | ]
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| 206 |
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| 207 | cut-text: make function! [] [
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| 208 | undo-add face
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| 209 | copy-selected-text face
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| 210 | delete-selected-text
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| 211 | ]
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| 212 |
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| 213 | paste-text: make function! [] [
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| 214 | undo-add face
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| 215 | delete-selected-text
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| 216 | face/line-list: none
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| 217 | view*/caret: insert view*/caret read clipboard://
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| 218 | ]
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| 219 |
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| 220 | ; Undo / Redo functions
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| 221 |
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| 222 | undo-max: 20 ; max number of undo levels, none = unlimited
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| 223 |
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| 224 | undo-add: make function! [face] [
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| 225 | if in face 'undo [
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| 226 | insert clear face/undo at copy face/text index? view*/caret
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| 227 | if all [undo-max undo-max < length? head face/undo] [remove head face/undo]
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| 228 | face/undo: tail face/undo
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| 229 | ]
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| 230 | ]
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| 231 |
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| 232 | undo-get: make function! [face] [
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| 233 | face/text: head view*/caret: first face/undo
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| 234 | face/line-list: none
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| 235 | remove face/undo
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| 236 | ]
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| 237 |
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| 238 | ; Cursor movement functions
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| 239 |
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| 240 | word-limits: make bitset! " ^/^-^m/[](){}^""
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| 241 | word-limits: reduce [word-limits complement word-limits]
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| 242 |
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| 243 | current-word: make function! [str /local s ns] [
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| 244 | unless string? str [gui-error/continue reform ["Current word trap" type? str str] exit]
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| 245 | set [s] word-limits
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| 246 | s: any [all [s: find/reverse str s next s] head str]
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| 247 | set [ns] word-limits
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| 248 | ns: any [find str ns tail str]
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| 249 | ; hilight word
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| 250 | hilight-text s ns
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| 251 | show view*/focal-face
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| 252 | ]
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| 253 |
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| 254 | next-word: make function! [str /local s ns] [
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| 255 | set [s ns] word-limits
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| 256 | any [all [s: find str s find s ns] tail str]
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| 257 | ]
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| 258 |
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| 259 | back-word: make function! [str /local s ns] [
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| 260 | set [s ns] word-limits
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| 261 | any [all [ns: find/reverse str ns ns: find/reverse ns s next ns] head str]
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| 262 | ]
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| 263 |
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| 264 | end-of-line: make function! [str] [
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| 265 | any [find str "^/" tail str]
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| 266 | ]
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| 267 |
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| 268 | beg-of-line: make function! [str /local nstr] [
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| 269 | either nstr: find/reverse str "^/" [next nstr] [head str]
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| 270 | ]
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| 271 |
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| 272 | next-field: make function! [face /wrap] [
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| 273 | unless face/parent-face [return none]
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| 274 | unless find [object! block!] type?/word get in face/parent-face 'pane [ ; An iterated face may of course be tabbable, too.
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| 275 | return none ; I don't handle this case for now, though.
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| 276 | ]
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| 277 |
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| 278 | siblings: compose [(face/parent-face/pane)]
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| 279 |
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| 280 | unless wrap [siblings: find/tail siblings face]
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| 281 |
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| 282 | foreach sibling siblings [ ; Return younger siblings, nieces and nephews.
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| 283 | if target: any [
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| 284 | tabbed? sibling
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| 285 | into-widget/forwards sibling
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| 286 | ][
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| 287 | return target
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| 288 | ]
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| 289 | ]
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| 290 |
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| 291 | all [ ; Return aunts, uncles and cousins.
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| 292 | not cyclic? face/parent-face
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| 293 | target: next-field face/parent-face
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| 294 | return target
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| 295 | ]
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| 296 |
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| 297 | all [ ; Return older siblings.
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| 298 | target: next-field/wrap face
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| 299 | return target
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| 300 | ]
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| 301 | ]
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| 302 |
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| 303 | back-field: make function! [face /wrap] [
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| 304 | unless face/parent-face [return none]
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| 305 | unless find [object! block!] type?/word get in face/parent-face 'pane [ ; An iterated faces may of course be tabbable, too.
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| 306 | return none ; I don't handle this case for now, though.
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| 307 | ]
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| 308 |
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| 309 | siblings: reverse compose [(face/parent-face/pane)]
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| 310 |
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| 311 | unless wrap [siblings: find/tail siblings face]
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| 312 |
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| 313 | foreach sibling siblings [ ; Return younger siblings, nieces and nephews.
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| 314 | if target: any [
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| 315 | tabbed? sibling
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| 316 | into-widget/backwards sibling
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| 317 | ][
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| 318 | return target
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| 319 | ]
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| 320 | ]
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| 321 | all [ ; Return aunts, uncles and cousins.
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| 322 | not cyclic? face/parent-face
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| 323 | target: back-field face/parent-face
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| 324 | return target
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| 325 | ]
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| 326 |
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| 327 | all [ ; Return older siblings.
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| 328 | target: back-field/wrap face
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| 329 | return target
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| 330 | ]
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| 331 | ]
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| 332 |
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| 333 | into-widget: make function! [
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| 334 | "Recursivly returns the first tabbable face in parent's face pane tree."
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| 335 | face [object!]
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| 336 | /forwards
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| 337 | /backwards
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| 338 | /local
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| 339 | target children
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| 340 | ][
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| 341 | unless find [object! block!] type?/word get in face 'pane [ ; An iterated faces may of course be tabbable, too. I don't handle this case for now, though.
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| 342 | return none
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| 343 | ]
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| 344 | unless face/show? [ ; Tab-panel panes have show?: false
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| 345 | return none
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| 346 | ]
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| 347 | children: compose [(face/pane)]
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| 348 | catch [
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| 349 | foreach child either backwards [reverse children] [children] [
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| 350 | if target: any [
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| 351 | tabbed? child ; The successing face is tabbable, so just return it.
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| 352 | either backwards [
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| 353 | into-widget/backwards child
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| 354 | ][
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| 355 | into-widget child
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| 356 | ]
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| 357 | ][
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| 358 | throw target
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| 359 | ]
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| 360 | ]
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| 361 | ]
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| 362 | ]
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| 363 |
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| 364 | keys-to-insert: make bitset! #{01000000FFFFFFFFFFFFFFFFFFFFFF7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF}
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| 365 |
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| 366 | insert-char: make function! [face char] [
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| 367 | delete-selected-text
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| 368 | unless any [insert? tail? view*/caret "^/" = first view*/caret] [remove view*/caret] ; AGT #25
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| 369 | insert view*/caret char
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| 370 | view*/caret: next view*/caret
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| 371 | ]
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| 372 |
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| 373 | move: make function! [event ctrl plain] [
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| 374 | either event/shift [
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| 375 | any [view*/highlight-start view*/highlight-start: view*/caret]
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| 376 | ] [unlight-text]
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| 377 | view*/caret: either event/control ctrl plain
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| 378 | if event/shift [
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| 379 | either view*/caret = view*/highlight-start [unlight-text] [view*/highlight-end: view*/caret]
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| 380 | ]
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| 381 | ]
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| 382 |
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| 383 | move-y: make function! [face delta /local pos tmp tmp2] [
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| 384 | tmp: offset-to-caret face 0x2 + delta + pos: caret-to-offset face view*/caret
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| 385 | tmp2: caret-to-offset face tmp
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| 386 | either tmp2/y <> pos/y [tmp] [view*/caret]
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| 387 | ]
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| 388 |
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| 389 | edit-text: make function! [
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| 390 | face event
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| 391 | /local key edge para caret scroll page-up page-down face-size
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| 392 | ][
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| 393 | face-size: face/size - either face/edge [2 * face/edge/size] [0]
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| 394 | key: event/key
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| 395 | if char? key [
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| 396 | either find keys-to-insert key [
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| 397 | undo-add face
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| 398 | insert-char face key
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| 399 | ] [key: select keymap key]
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| 400 | ]
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| 401 | if word? key [
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| 402 | page-up: [move-y face face-size - sizes/font-height - sizes/font-height * 0x-1]
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| 403 | page-down: [move-y face face-size - sizes/font-height * 0x1]
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| 404 | do select [
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| 405 | left [move event [back-word view*/caret] [back view*/caret]]
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| 406 | right [move event [next-word view*/caret] [next view*/caret]]
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| 407 | up [move event page-up [move-y face sizes/font-height * 0x-1]]
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| 408 | down [move event page-down [move-y face sizes/font-height * 0x1]]
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| 409 | page-up [move event [head view*/caret] page-up]
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| 410 | page-down [move event [tail view*/caret] page-down]
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| 411 | home [move event [head view*/caret] [beg-of-line view*/caret]]
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| 412 | end [move event [tail view*/caret] [end-of-line view*/caret]]
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| 413 | insert [either event/shift [paste-text] [insert?: complement insert?]]
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| 414 | back-char [
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| 415 | undo-add face
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| 416 | any [
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| 417 | delete-selected-text
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| 418 | head? view*/caret
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| 419 | either event/control [
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| 420 | tmp: view*/caret
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| 421 | remove/part view*/caret: back-word tmp tmp
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| 422 | ] [remove view*/caret: back view*/caret]
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| 423 | ]
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| 424 | ]
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| 425 | del-char [
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| 426 | undo-add face
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| 427 | either event/shift [unless face/type = 'password [cut-text]] [ ; shift+Del cut
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| 428 | any [
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|---|
| 429 | delete-selected-text
|
|---|
| 430 | tail? view*/caret
|
|---|
| 431 | either event/control [
|
|---|
| 432 | remove/part view*/caret back next-word view*/caret
|
|---|
| 433 | if tail? next view*/caret [remove back tail view*/caret]
|
|---|
| 434 | ] [remove view*/caret]
|
|---|
| 435 | ]
|
|---|
| 436 | ]
|
|---|
| 437 | ]
|
|---|
| 438 | enter [
|
|---|
| 439 | either find behaviors/action-on-enter face/type [
|
|---|
| 440 | all [face/type = 'spinner face/action/on-unfocus face]
|
|---|
| 441 | set-focus face
|
|---|
| 442 | face/action/on-click face
|
|---|
| 443 | ][
|
|---|
| 444 | undo-add face
|
|---|
| 445 | insert-char face "^/"
|
|---|
| 446 | ]
|
|---|
| 447 | ]
|
|---|
| 448 | ctrl-enter [undo-add face insert-char face tab]
|
|---|
| 449 | all-text [hilight-all face]
|
|---|
| 450 | copy-text [unless face/type = 'password [copy-selected-text face unlight-text]]
|
|---|
| 451 | cut-text [unless face/type = 'password [cut-text]]
|
|---|
| 452 | paste-text [paste-text]
|
|---|
| 453 | clear-tail [
|
|---|
| 454 | undo-add face
|
|---|
| 455 | remove/part view*/caret end-of-line view*/caret
|
|---|
| 456 | ]
|
|---|
| 457 | undo [
|
|---|
| 458 | if all [in face 'undo not head? face/undo] [
|
|---|
| 459 | insert face/undo at copy face/text index? view*/caret
|
|---|
| 460 | face/undo: back face/undo
|
|---|
| 461 | undo-get face
|
|---|
| 462 | ]
|
|---|
| 463 | ]
|
|---|
| 464 | redo [
|
|---|
| 465 | if all [in face 'undo not tail? face/undo] [
|
|---|
| 466 | face/undo: insert face/undo at copy face/text index? view*/caret
|
|---|
| 467 | undo-get face
|
|---|
| 468 | ]
|
|---|
| 469 | ]
|
|---|
| 470 | undo-all [
|
|---|
| 471 | if in face 'esc [
|
|---|
| 472 | clear face/text
|
|---|
| 473 | all [in face 'undo clear face/undo]
|
|---|
| 474 | all [string? face/esc insert face/text face/esc]
|
|---|
| 475 | view*/caret: tail face/text
|
|---|
| 476 | ]
|
|---|
| 477 | ]
|
|---|
| 478 | spellcheck [
|
|---|
| 479 | request-spellcheck face
|
|---|
| 480 | ]
|
|---|
| 481 | ] key
|
|---|
| 482 | ]
|
|---|
| 483 | ; scroll to keep caret visible
|
|---|
| 484 | edge: face/edge
|
|---|
| 485 | para: face/para
|
|---|
| 486 | scroll: face/para/scroll
|
|---|
| 487 |
|
|---|
| 488 | if error? try [
|
|---|
| 489 | caret: caret-to-offset face view*/caret
|
|---|
| 490 |
|
|---|
| 491 | if caret/y < (edge/size/y + para/origin/y + para/indent/y) [ ; above top visible row ?
|
|---|
| 492 | scroll/y: round/to scroll/y - caret/y sizes/font-height ; scroll to make caret visible
|
|---|
| 493 | ]
|
|---|
| 494 |
|
|---|
| 495 | if caret/y > (face-size/y - sizes/font-height) [ ; below bottom visible row ? (face-size takes edge into account)
|
|---|
| 496 | scroll/y: round/to (scroll/y + ((face-size/y - sizes/font-height) - caret/y)) sizes/font-height
|
|---|
| 497 | ]
|
|---|
| 498 |
|
|---|
| 499 | unless para/wrap? [
|
|---|
| 500 | if caret/x < (edge/size/x + para/origin/x + para/indent/x) [
|
|---|
| 501 | scroll/x: scroll/x - caret/x + (edge/size/x + para/origin/x + para/indent/x)
|
|---|
| 502 | ]
|
|---|
| 503 | if caret/x > (face-size/x - para/margin/x) [
|
|---|
| 504 | scroll/x: scroll/x + (face-size/x - para/margin/x - caret/x)
|
|---|
| 505 | ]
|
|---|
| 506 | ]
|
|---|
| 507 |
|
|---|
| 508 | if scroll <> face/para/scroll [
|
|---|
| 509 | face/para/scroll: scroll
|
|---|
| 510 | if face/type = 'area [face/key-scroll?: true]
|
|---|
| 511 | ]
|
|---|
| 512 | ] [gui-error/continue reform ["Caret trap" face/type face/para]]
|
|---|
| 513 | show face
|
|---|
| 514 | ]
|
|---|
| 515 |
|
|---|
| 516 | feel: make object! [
|
|---|
| 517 | redraw: detect: over: none
|
|---|
| 518 | engage: func [face act event /local txt] [
|
|---|
| 519 | do select [
|
|---|
| 520 | key [
|
|---|
| 521 | unless all [get in face/action 'on-key not face/action/on-key face event] [
|
|---|
| 522 | txt: copy face/text
|
|---|
| 523 | edit-text face event
|
|---|
| 524 | all [
|
|---|
| 525 | get in face/action 'on-edit
|
|---|
| 526 | strict-not-equal? txt face/text
|
|---|
| 527 | face/action/on-edit face
|
|---|
| 528 | ]
|
|---|
| 529 | ]
|
|---|
| 530 | ]
|
|---|
| 531 | down [
|
|---|
| 532 | either event/double-click [
|
|---|
| 533 | all [view*/caret not empty? view*/caret current-word view*/caret]
|
|---|
| 534 | ][
|
|---|
| 535 | either face = view*/focal-face [
|
|---|
| 536 | unlight-text
|
|---|
| 537 | view*/caret: offset-to-caret face event/offset
|
|---|
| 538 | show face
|
|---|
| 539 | ] [
|
|---|
| 540 | caret: offset-to-caret face event/offset
|
|---|
| 541 | set-focus face
|
|---|
| 542 | ]
|
|---|
| 543 | ]
|
|---|
| 544 | ]
|
|---|
| 545 | over [
|
|---|
| 546 | unless view*/caret = offset-to-caret face event/offset [
|
|---|
| 547 | unless view*/highlight-start [view*/highlight-start: view*/caret]
|
|---|
| 548 | view*/highlight-end: view*/caret: offset-to-caret face event/offset
|
|---|
| 549 | show face
|
|---|
| 550 | ]
|
|---|
| 551 | ]
|
|---|
| 552 | alt-up [face/action/on-alt-click face]
|
|---|
| 553 | scroll-line [face/action/on-scroll face event/offset]
|
|---|
| 554 | scroll-page [face/action/on-scroll/page face event/offset]
|
|---|
| 555 | ] act
|
|---|
| 556 | ]
|
|---|
| 557 | ]
|
|---|
| 558 | ] |
|---|
