| 1 | package require Tk |
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| 2 | package require snit |
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| 3 | package require trycatch |
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| 4 | package require markupparser |
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| 5 | |
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| 6 | namespace import trycatch::* |
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| 7 | interp alias {} prefs {} ::Notebook::prefs |
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| 8 | |
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| 9 | #----------------------------------------------------------------------- |
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| 10 | # TITLE: |
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| 11 | # renderpane.tcl |
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| 12 | # |
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| 13 | # AUTHOR: |
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| 14 | # Will Duquette |
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| 15 | # |
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| 16 | # DESCRIPTION: |
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| 17 | # A read-only text widget designed to render Notebook markup. |
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| 18 | # From the standpoint of the caller, the "render" method replaces |
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| 19 | # the "insert" and "delete" methods, which are effectively no-ops. |
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| 20 | # |
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| 21 | # All necessary text widget commands are delegated down to the text |
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| 22 | # widget. This widget knows how to render and tag Notebook markup, |
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| 23 | # but it doesn't provide any of the active behavior. |
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| 24 | # |
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| 25 | # LICENSE: |
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| 26 | # Copyright (C) 2005 by William H. Duquette. This file may |
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| 27 | # be used subject to the terms in license.txt. |
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| 28 | # |
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| 29 | #----------------------------------------------------------------------- |
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| 30 | |
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| 31 | snit::widgetadaptor renderpane { |
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| 32 | #------------------------------------------------------------------- |
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| 33 | # Text Widget Adaptation |
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| 34 | |
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| 35 | # Disable the insert and delete methods, to make this readonly. |
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| 36 | method insert {args} {} |
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| 37 | method delete {args} {} |
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| 38 | |
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| 39 | # Pass all otherwise undefined methods and options to the real |
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| 40 | # text widget, so that the remaining behavior is as expected. |
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| 41 | delegate method * to hull |
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| 42 | delegate option * to hull |
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| 43 | |
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| 44 | #------------------------------------------------------------------- |
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| 45 | # Widget options |
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| 46 | |
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| 47 | # The command to use to query about a link's existence. Must take |
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| 48 | # a page name as argument and return 1 if it exists, and 0 otherwise. |
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| 49 | option -querycommand {} |
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| 50 | |
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| 51 | # The command to call when a page title is clicked. Should take the |
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| 52 | # title as its argument. |
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| 53 | option -titlecommand {} |
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| 54 | |
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| 55 | # The command to call when a page link is clicked. Should take the |
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| 56 | # name of the page to link to as its argument. |
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| 57 | option -linkcommand {} |
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| 58 | |
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| 59 | # The command to call when a magic button is clicked. The command |
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| 60 | # should take one argument, the script to execute. |
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| 61 | option -buttoncommand {} |
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| 62 | |
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| 63 | # The command to call when a macroerror is clicked. The command |
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| 64 | # should take one argument, the text of the macro. |
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| 65 | option -macroerrorcommand {} |
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| 66 | |
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| 67 | # The command to call to write a message to the message line |
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| 68 | option -messagecommand {} |
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| 69 | |
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| 70 | # The notebook file directory; used as the root for relative paths. |
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| 71 | option -dbdir {} |
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| 72 | |
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| 73 | # The missing image to show when [!image !] could not be resolved |
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| 74 | option -missingimage "" |
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| 75 | |
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| 76 | #------------------------------------------------------------------- |
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| 77 | # Instance Variables |
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| 78 | |
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| 79 | # The code associated with a magic button, where the index is |
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| 80 | # $button-$index. $button is the displayed text for the button |
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| 81 | # and $index is the index of the first character of the displayed text. |
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| 82 | variable bcode |
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| 83 | |
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| 84 | # Counter used to generate names for horizontal line elements in |
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| 85 | # the text pane. |
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| 86 | variable counter 0 |
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| 87 | |
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| 88 | # Escape character substitutions |
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| 89 | # TBD: Some of this should probably be done as part of markup parsing. |
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| 90 | variable escapeMapping \ |
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| 91 | "< < > > &lb; \[ &rb; \] & &" |
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| 92 | |
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| 93 | # Image List -- loaded images, for later destruction |
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| 94 | variable imageList {} |
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| 95 | |
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| 96 | # Image Data array: the index is the text widget index of the image, |
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| 97 | # and the value is the text to display. |
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| 98 | variable imageData |
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| 99 | |
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| 100 | typevariable defaultMissingImage |
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| 101 | |
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| 102 | # Type constructor: build resources |
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| 103 | typeconstructor { |
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| 104 | set defaultMissingImage [ image create photo -data { |
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| 105 | R0lGODlhIAAgAIAAADNmmQUFBSwAAAAAIAAgAAACYIyPqZvgD6OcztCLn81c7g4C36Vwo8cE2Kml |
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| 106 | B6lSb1VOLBS3iJx3NRoSNWy9zA/oG/JAR6RRuTTtntIZ9WldFYk3YpC5RXWdvOkVZtZis7D1GBeO |
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| 107 | pNVfad1+p+fLrn6qAAA7q |
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| 108 | } ] |
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| 109 | } |
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| 110 | |
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| 111 | #----------------------------------------------------------------------- |
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| 112 | # Constructor and Destructor |
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| 113 | |
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| 114 | constructor {args} { |
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| 115 | set options(-querycommand) [codename DefaultQueryCmd] |
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| 116 | set options(-missingimage) $defaultMissingImage |
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| 117 | |
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| 118 | # Next, create the rotext pane. |
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| 119 | installhull using text \ |
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| 120 | -insertwidth 0 \ |
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| 121 | -borderwidth 5 \ |
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| 122 | -relief flat \ |
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| 123 | -setgrid true \ |
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| 124 | -wrap word \ |
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| 125 | -cursor xterm |
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| 126 | |
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| 127 | # At present, all delegated options are delegated to the |
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| 128 | # hull component, so now we can configure. |
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| 129 | $self configurelist $args |
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| 130 | |
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| 131 | # Next, create the bullet icons |
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| 132 | image create bitmap $win.bullet1 -data { |
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| 133 | #define button_width 8 |
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| 134 | #define button_height 8 |
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| 135 | static unsigned char button_bits[] = { |
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| 136 | 0x00, 0x3c, 0x7e, 0x7e, 0x7e, 0x7e, 0x3c, 0x00}; |
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| 137 | } |
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| 138 | |
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| 139 | image create bitmap $win.bullet2 -data { |
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| 140 | #define bullet2_width 8 |
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| 141 | #define bullet2_height 8 |
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| 142 | static unsigned char bullet2_bits[] = { |
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| 143 | 0x00, 0x18, 0x3c, 0x7e, 0x7e, 0x3c, 0x18, 0x00}; |
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| 144 | } |
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| 145 | |
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| 146 | image create bitmap $win.bullet3 -data { |
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| 147 | #define bullet3_width 8 |
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| 148 | #define bullet3_height 8 |
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| 149 | static unsigned char bullet3_bits[] = { |
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| 150 | 0x00, 0x00, 0x00, 0x7e, 0x7e, 0x00, 0x00, 0x00}; |
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| 151 | } |
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| 152 | |
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| 153 | # Next, add the markup tags, using the user preferences. |
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| 154 | $self UsePreferences |
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| 155 | |
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| 156 | # Next, copy the default Text bindings to the renderpane, |
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| 157 | # and adjust the bindtags so that the Text bindings no longer |
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| 158 | # matter. This will allow us to override them. |
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| 159 | |
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| 160 | foreach sym [bind Text] { |
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| 161 | bind $win $sym [bind Text $sym] |
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| 162 | } |
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| 163 | |
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| 164 | set bt [bindtags $win] |
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| 165 | set ndx [lsearch -exact $bt Text] |
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| 166 | bindtags $win [lreplace $bt $ndx $ndx] |
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| 167 | |
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| 168 | # Next, remove the <<Cut>> and <<Paste>> tags, etc., since renderpanes |
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| 169 | # aren't editable. |
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| 170 | bind $win <<Cut>> "" |
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| 171 | bind $win <<Paste>> "" |
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| 172 | bind $win <<Undo>> "" |
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| 173 | bind $win <<Redo>> "" |
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| 174 | |
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| 175 | # When over an active tag, the cursor should be a hand. |
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| 176 | foreach tag {title link button macroerror} { |
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| 177 | $hull tag bind $tag <Enter> \ |
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| 178 | [mymethod EnterHandler $tag %x %y] |
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| 179 | |
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| 180 | $hull tag bind $tag <Leave> \ |
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| 181 | [mymethod LeaveHandler $tag %x %y] |
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| 182 | } |
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| 183 | |
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| 184 | # While over images, display the -text and path. |
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| 185 | $hull tag bind image <Enter> [mymethod EnterImage %x %y] |
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| 186 | $hull tag bind image <Leave> [mymethod LeaveImage %x %y] |
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| 187 | |
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| 188 | # Prepare to receive preferences events; unregister on |
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| 189 | # destroy. |
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| 190 | prefs register $selfns [mymethod UsePreferences] |
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| 191 | |
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| 192 | # Add better navigation keys |
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| 193 | bind $win <Key-Down> [list $hull yview scroll 1 units] |
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| 194 | bind $win <Key-Up> [list $hull yview scroll -1 units] |
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| 195 | bind $win <Key-Next> [list $hull yview scroll 1 pages] |
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| 196 | bind $win <Key-Prior> [list $hull yview scroll -1 pages] |
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| 197 | bind $win <Key-Home> [list $hull yview moveto 0] |
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| 198 | bind $win <Key-End> [list $hull yview moveto 1] |
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| 199 | |
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| 200 | # Add mouse interactions |
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| 201 | $hull tag bind title <1> \ |
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| 202 | [mymethod TitleHandler %x %y] |
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| 203 | |
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| 204 | $hull tag bind link <1> \ |
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| 205 | [mymethod LinkHandler %x %y] |
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| 206 | |
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| 207 | $hull tag bind button <ButtonRelease-1> \ |
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| 208 | [mymethod ButtonHandler %x %y] |
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| 209 | |
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| 210 | $hull tag bind macroerror <ButtonRelease-1> \ |
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| 211 | [mymethod MacroErrorHandler %x %y] |
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| 212 | |
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| 213 | } |
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| 214 | |
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| 215 | destructor { |
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| 216 | catch {prefs unregister $selfns} |
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| 217 | catch {image delete $win.bullet1 $win.bullet2 $win.bullet3} |
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| 218 | catch {$self FreeImages} |
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| 219 | } |
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| 220 | |
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| 221 | #----------------------------------------------------------------------- |
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| 222 | # Public methods |
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| 223 | |
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| 224 | # Render a page into the page. Uses ::markupparser::parseWithHandler |
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| 225 | # and ParseHandler to do the job. |
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| 226 | method render {title text} { |
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| 227 | variable sty |
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| 228 | |
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| 229 | # FIRST, delete all text from the text widget. |
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| 230 | $hull del 1.0 end |
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| 231 | |
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| 232 | # NEXT, forget all images |
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| 233 | $self FreeImages |
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| 234 | |
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| 235 | # NEXT, forget about any magic buttons; we'll build a new set. |
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| 236 | array unset bcode |
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| 237 | |
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| 238 | # NEXT, render the title |
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| 239 | if { $title ne "" } { |
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| 240 | $hull insert end " $title\n" title |
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| 241 | $hull insert end "\n" |
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| 242 | } |
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| 243 | |
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| 244 | # NEXT, enable the default text style and indent |
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| 245 | set sty(para) "" |
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| 246 | set sty(txt) "" |
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| 247 | set indent 0 |
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| 248 | |
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| 249 | # NEXT, render the page's text |
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| 250 | foreach {tag value} [::markupparser::parse $text] { |
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| 251 | switch -exact -- $tag { |
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| 252 | META { } |
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| 253 | HASH { |
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| 254 | # FIRST, #--- is always displayed specially. |
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| 255 | if {[string match "#---*" $value]} { |
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| 256 | $self InsertHLine |
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| 257 | continue |
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| 258 | } |
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| 259 | |
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| 260 | # NEXT, if the prefs flag is set then all directives |
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| 261 | # are displayed. |
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| 262 | if {[prefs get displaydirectives]} { |
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| 263 | $hull insert end $value pre |
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| 264 | continue |
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| 265 | } |
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| 266 | |
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| 267 | # NEXT, display directives based on what they are. |
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| 268 | if {[string match "#pre*" $value]} { |
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| 269 | # Skip it. |
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| 270 | } elseif {[string match "#unpre*" $value]} { |
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| 271 | # Skip it. |
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| 272 | } elseif {[string match "#meta*" $value]} { |
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| 273 | # Skip it. |
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| 274 | } elseif {[string match "#rem*" $value]} { |
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| 275 | # Skip it. |
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| 276 | } elseif {[string match "#data*" $value]} { |
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| 277 | # Skip it |
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| 278 | } elseif {[string match "#undata*" $value]} { |
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| 279 | # Skip it |
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| 280 | } elseif {[string match "#Tcl*" $value]} { |
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| 281 | # Skip it |
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| 282 | } elseif {[string match "#unTcl*" $value]} { |
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| 283 | # Skip it |
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| 284 | } else { |
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| 285 | $hull insert end $value pre |
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| 286 | } |
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| 287 | } |
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| 288 | PRE { |
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| 289 | $hull insert end $value pre |
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| 290 | } |
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| 291 | TCL { |
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| 292 | $hull insert end $value tcl |
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| 293 | } |
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| 294 | DATA { |
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| 295 | array set fields $value |
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| 296 | $hull insert end $fields(data) pre |
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| 297 | } |
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| 298 | H { |
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| 299 | set lev [lindex $value 0] |
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| 300 | set htext [lindex $value 1] |
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| 301 | |
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| 302 | $hull insert end "$htext\n" header$lev |
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| 303 | } |
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| 304 | P { |
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| 305 | set ptype [lindex $value 0] |
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| 306 | set indent [lindex $value 1] |
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| 307 | |
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| 308 | # FIRST, basic paragraph setup. |
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| 309 | set sty(bold) "" |
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| 310 | set sty(italic) "" |
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| 311 | set sty(mono) "" |
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| 312 | set sty(strike) "" |
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| 313 | set sty(small) "" |
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| 314 | set sty(header) "" |
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| 315 | set sty(para) "" |
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| 316 | set sty(txt) "" |
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| 317 | set sty(link) "link" |
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| 318 | set sty(button) "button" |
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| 319 | |
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| 320 | # NEXT, set up for bulleted and indented paragraphs |
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| 321 | |
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| 322 | if {$ptype eq "*"} { |
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| 323 | set sty(para) "indent$indent" |
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| 324 | set sty(txt) $sty(para) |
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| 325 | set sty(link) [concat $sty(txt) link] |
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| 326 | set sty(button) [concat $sty(txt) button] |
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| 327 | |
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| 328 | set lead [string repeat "\t" [expr {$indent - 1}]] |
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| 329 | |
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| 330 | switch $indent { |
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| 331 | 1 {set image $win.bullet1} |
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| 332 | 2 {set image $win.bullet2} |
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| 333 | default {set image $win.bullet3} |
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| 334 | } |
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| 335 | |
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| 336 | $hull insert end "$lead" $sty(para) |
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| 337 | $hull image create end -image $image -align center |
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| 338 | $hull insert end "\t" $sty(para) |
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| 339 | } elseif {$indent > 0} { |
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| 340 | set sty(para) "indent$indent" |
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| 341 | set sty(txt) $sty(para) |
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| 342 | set sty(link) [concat $sty(txt) link] |
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| 343 | set sty(button) [concat $sty(txt) button] |
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| 344 | |
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| 345 | $hull insert end [string repeat "\t" $indent] $sty(para) |
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| 346 | } |
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| 347 | } |
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| 348 | STY { |
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| 349 | switch -exact -- [lindex $value 0] { |
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| 350 | m1 { |
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| 351 | set sty(mono) "mono" |
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| 352 | set sty(header) "" |
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| 353 | set sty(small) ""} |
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| 354 | m0 { |
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| 355 | set sty(mono) "" |
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| 356 | } |
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| 357 | b1 { |
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| 358 | set sty(bold) "bold" |
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| 359 | set sty(header) "" |
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| 360 | set sty(small) "" |
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| 361 | } |
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| 362 | b0 { |
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| 363 | set sty(bold) "" |
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| 364 | } |
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| 365 | i1 { |
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| 366 | set sty(italic) "italic" |
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| 367 | set sty(header) "" |
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| 368 | set sty(small) "" |
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| 369 | } |
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| 370 | i0 { |
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| 371 | set sty(italic) "" |
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| 372 | } |
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| 373 | h1 { |
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| 374 | set sty(header) "header3" |
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| 375 | set sty(bold) "" |
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| 376 | set sty(italic) "" |
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| 377 | set sty(mono) "" |
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| 378 | set sty(small) "" |
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| 379 | } |
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| 380 | h0 { |
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| 381 | set sty(header) "" |
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| 382 | } |
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| 383 | s1 { |
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| 384 | set sty(small) "small" |
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| 385 | set sty(bold) "" |
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| 386 | set sty(italic) "" |
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| 387 | set sty(mono) "" |
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| 388 | set sty(header) "" |
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| 389 | } |
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| 390 | s0 { |
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| 391 | set sty(small) "" |
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| 392 | } |
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| 393 | x1 { |
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| 394 | set sty(strike) "strike" |
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| 395 | } |
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| 396 | x0 { |
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| 397 | set sty(strike) "" |
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| 398 | } |
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| 399 | default {error "Unknown style: [lindex $value 1]"} |
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| 400 | } |
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| 401 | |
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| 402 | # Build the style list |
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| 403 | if {$sty(header) ne ""} { |
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| 404 | set theFont $sty(header) |
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| 405 | } |
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| 406 | |
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| 407 | set sty(txt) "$sty(para) $sty(mono)$sty(bold)$sty(italic) $sty(strike) $sty(header) $sty(small)" |
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| 408 | set sty(link) [concat $sty(txt) link] |
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| 409 | set sty(button) [concat $sty(txt) button] |
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| 410 | } |
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| 411 | LINK { |
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| 412 | #set value [NormalizeSpace $value] |
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| 413 | |
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| 414 | if {![regexp {^([^|]+)\|(.*$)} $value dummy linktext name]} { |
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| 415 | set linktext $value |
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| 416 | set name $value |
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| 417 | } |
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| 418 | set linktext [NormalizeNewlines $linktext] |
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| 419 | set name [NormalizeSpace $name] |
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| 420 | |
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| 421 | # If it exists, show it normally; if not, show it differently. |
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| 422 | if {[$self QueryLink $name]} { |
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| 423 | set index [$hull index insert] |
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| 424 | $hull insert end $linktext $sty(link) |
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| 425 | } else { |
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| 426 | $hull insert end "\[" [concat $sty(txt) warning] |
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| 427 | set index [$hull index insert] |
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| 428 | $hull insert end $linktext $sty(link) |
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| 429 | $hull insert end "\]" [concat $sty(txt) warning] |
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| 430 | } |
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| 431 | |
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| 432 | # Save the page to link to in bcode. |
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| 433 | set bcode([string tolower $linktext]-$index) $name |
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| 434 | } |
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| 435 | BTN { |
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| 436 | if {[regexp {^([^|]+)\|(.*$)} $value dummy bname code]} { |
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| 437 | set bname [NormalizeNewlines $bname] |
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| 438 | set index [$hull index insert] |
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| 439 | set bcode([string tolower $bname]-$index) $code |
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| 440 | $hull insert end $bname $sty(button) |
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| 441 | } else { |
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| 442 | $hull insert end "\[%$value%\]" warningmono |
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| 443 | } |
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| 444 | } |
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| 445 | OBJECT { |
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| 446 | set obj [getobj $value] |
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| 447 | switch -exact [lindex $obj 0] { |
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| 448 | image { |
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| 449 | $self InsertImage $obj |
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| 450 | } |
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| 451 | error { |
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| 452 | $hull insert end "\[!$value!\]" warningmono |
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| 453 | $self Msg [lindex $obj 1] |
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| 454 | } |
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| 455 | default { |
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| 456 | $hull insert end "\[!$value!\]" warningmono |
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| 457 | $self Msg "Unrecognized object type: $value" |
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| 458 | } |
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| 459 | } |
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| 460 | } |
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| 461 | MACRO { |
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| 462 | # We should see this only if macro expansion failed for this |
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| 463 | # macro |
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| 464 | $hull insert end "\[@$value@\]" macroerror |
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| 465 | } |
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| 466 | TXT - |
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| 467 | HTML { |
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| 468 | # Normalize normal text: replace the whitespace between lines |
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| 469 | # a single space. |
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| 470 | regsub -all {\s*\n\s*} $value " " value |
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| 471 | $hull insert end [string map $escapeMapping $value] $sty(txt) |
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| 472 | } |
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| 473 | BR { |
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| 474 | $hull insert end "\n" $sty(txt) |
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| 475 | $hull insert end [string repeat "\t" $indent] $sty(para) |
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| 476 | } |
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| 477 | /P - |
|---|
| 478 | NL { |
|---|
| 479 | $hull insert end "\n" $sty(txt) |
|---|
| 480 | } |
|---|
| 481 | default {error "Unknown markup tag: $tag"} |
|---|
| 482 | } |
|---|
| 483 | } |
|---|
| 484 | } |
|---|
| 485 | |
|---|
| 486 | # Tag text that matches the search text. |
|---|
| 487 | method searchfor {searchText} { |
|---|
| 488 | $hull tag remove search 1.0 end |
|---|
| 489 | |
|---|
| 490 | set pattern [string trim $searchText] |
|---|
| 491 | |
|---|
| 492 | if {$pattern eq ""} { |
|---|
| 493 | return |
|---|
| 494 | } |
|---|
| 495 | |
|---|
| 496 | set done 0 |
|---|
| 497 | set index 1.0 |
|---|
| 498 | set count 0 |
|---|
| 499 | while {1} { |
|---|
| 500 | set index [$hull search -nocase -count count -- $pattern $index end] |
|---|
| 501 | |
|---|
| 502 | if {$index eq ""} { |
|---|
| 503 | return |
|---|
| 504 | } |
|---|
| 505 | |
|---|
| 506 | set endIndex [$hull index "$index + $count chars"] |
|---|
| 507 | |
|---|
| 508 | $hull tag add search $index $endIndex |
|---|
| 509 | |
|---|
| 510 | set index $endIndex |
|---|
| 511 | } |
|---|
| 512 | } |
|---|
| 513 | |
|---|
| 514 | |
|---|
| 515 | #----------------------------------------------------------------------- |
|---|
| 516 | # Private Methods and Procs |
|---|
| 517 | |
|---|
| 518 | # Given the name of a tag that's been clicked on, and the x,y pixel |
|---|
| 519 | # coordinates of the click, return the tagged text. |
|---|
| 520 | method GetTagText {tag x y} { |
|---|
| 521 | set range [$hull tag prevrange $tag "@$x,$y +1 chars"] |
|---|
| 522 | |
|---|
| 523 | return [$hull get [lindex $range 0] [lindex $range 1]] |
|---|
| 524 | } |
|---|
| 525 | |
|---|
| 526 | # Given the name of a tag that's been clicked on, and the x,y pixel |
|---|
| 527 | # coordinates of the click, return the range {startIndex endIndex}. |
|---|
| 528 | method GetTagRange {tag x y} { |
|---|
| 529 | return [$hull tag prevrange $tag "@$x,$y +1 chars"] |
|---|
| 530 | } |
|---|
| 531 | |
|---|
| 532 | # Returns 1 if a link exists and 0 otherwise. Uses the -querycommand. |
|---|
| 533 | method QueryLink {name} { |
|---|
| 534 | set command $options(-querycommand) |
|---|
| 535 | lappend command $name |
|---|
| 536 | return [uplevel \#0 $command] |
|---|
| 537 | } |
|---|
| 538 | |
|---|
| 539 | # Default query; always returns true. |
|---|
| 540 | proc DefaultQueryCmd {args} { |
|---|
| 541 | return 1 |
|---|
| 542 | } |
|---|
| 543 | |
|---|
| 544 | # Called when a special tag is entered |
|---|
| 545 | method EnterHandler {tag x y} { |
|---|
| 546 | $hull configure -cursor hand2 |
|---|
| 547 | |
|---|
| 548 | if {$tag eq "link" || $tag eq "button"} { |
|---|
| 549 | set range [$self GetTagRange $tag $x $y] |
|---|
| 550 | set name [$hull get [lindex $range 0] [lindex $range 1]] |
|---|
| 551 | set index [lindex $range 0] |
|---|
| 552 | |
|---|
| 553 | set bcodeKey "[string tolower $name]-$index" |
|---|
| 554 | |
|---|
| 555 | # TBD: It would be better if there were a -hovercommand; |
|---|
| 556 | # it could be passed the relevant info, and the caller |
|---|
| 557 | # could decide how to use it. |
|---|
| 558 | |
|---|
| 559 | $self Msg $bcode($bcodeKey) |
|---|
| 560 | } |
|---|
| 561 | } |
|---|
| 562 | |
|---|
| 563 | # Called when a special tag is left |
|---|
| 564 | method LeaveHandler {tag x y} { |
|---|
| 565 | $hull configure -cursor xterm |
|---|
| 566 | |
|---|
| 567 | if {$tag eq "link" || $tag eq "button"} { |
|---|
| 568 | $self Msg "" |
|---|
| 569 | } |
|---|
| 570 | } |
|---|
| 571 | |
|---|
| 572 | # Called when an image is entered |
|---|
| 573 | method EnterImage {x y} { |
|---|
| 574 | set ndx [$hull index @$x,$y] |
|---|
| 575 | $self Msg $imageData($ndx) |
|---|
| 576 | } |
|---|
| 577 | |
|---|
| 578 | # Called when an image is left |
|---|
| 579 | method LeaveImage {x y} { |
|---|
| 580 | $self Msg "" |
|---|
| 581 | } |
|---|
| 582 | |
|---|
| 583 | # Called to write a message to the -messagecommand. |
|---|
| 584 | method Msg {text} { |
|---|
| 585 | if {$options(-messagecommand) eq ""} { |
|---|
| 586 | return |
|---|
| 587 | } |
|---|
| 588 | |
|---|
| 589 | set cmd $options(-messagecommand) |
|---|
| 590 | lappend cmd $text |
|---|
| 591 | uplevel \#0 $cmd |
|---|
| 592 | } |
|---|
| 593 | |
|---|
| 594 | # Called when the title is clicked. |
|---|
| 595 | method TitleHandler {x y} { |
|---|
| 596 | set command $options(-titlecommand) |
|---|
| 597 | |
|---|
| 598 | if {$command eq ""} { |
|---|
| 599 | return |
|---|
| 600 | } |
|---|
| 601 | |
|---|
| 602 | # As formatted, the title includes leading and trailing |
|---|
| 603 | # whitespace; delete it. |
|---|
| 604 | lappend command [string trim [$self GetTagText title $x $y]] |
|---|
| 605 | uplevel \#0 $command |
|---|
| 606 | } |
|---|
| 607 | |
|---|
| 608 | # Called when a link is clicked. |
|---|
| 609 | method LinkHandler {x y} { |
|---|
| 610 | set command $options(-linkcommand) |
|---|
| 611 | |
|---|
| 612 | if {$command eq ""} { |
|---|
| 613 | return |
|---|
| 614 | } |
|---|
| 615 | |
|---|
| 616 | set range [$self GetTagRange link $x $y] |
|---|
| 617 | set name [$hull get [lindex $range 0] [lindex $range 1]] |
|---|
| 618 | set index [lindex $range 0] |
|---|
| 619 | |
|---|
| 620 | lappend command $bcode([string tolower $name]-$index) |
|---|
| 621 | uplevel \#0 $command |
|---|
| 622 | } |
|---|
| 623 | |
|---|
| 624 | # Finds the button script and calls the button command |
|---|
| 625 | method ButtonHandler {x y} { |
|---|
| 626 | set command $options(-buttoncommand) |
|---|
| 627 | |
|---|
| 628 | if {$command eq ""} { |
|---|
| 629 | return |
|---|
| 630 | } |
|---|
| 631 | |
|---|
| 632 | set range [$self GetTagRange button $x $y] |
|---|
| 633 | set name [$hull get [lindex $range 0] [lindex $range 1]] |
|---|
| 634 | set index [lindex $range 0] |
|---|
| 635 | |
|---|
| 636 | lappend command $bcode([string tolower $name]-$index) |
|---|
| 637 | uplevel \#0 $command |
|---|
| 638 | } |
|---|
| 639 | |
|---|
| 640 | # Finds the macroerror macro text and calls the macroerror command |
|---|
| 641 | method MacroErrorHandler {x y} { |
|---|
| 642 | set command $options(-macroerrorcommand) |
|---|
| 643 | |
|---|
| 644 | if {$command eq ""} { |
|---|
| 645 | return |
|---|
| 646 | } |
|---|
| 647 | |
|---|
| 648 | # The macro [@ @] brackets are included in the text; remove |
|---|
| 649 | # them. |
|---|
| 650 | set macro [string range [$self GetTagText macroerror $x $y] 2 end-2] |
|---|
| 651 | |
|---|
| 652 | lappend command $macro |
|---|
| 653 | uplevel \#0 $command |
|---|
| 654 | } |
|---|
| 655 | |
|---|
| 656 | # defines and updates style tags when preferences change. |
|---|
| 657 | method UsePreferences {} { |
|---|
| 658 | # TBD: Make this a preference setting. |
|---|
| 659 | set tabWidth 0.2 |
|---|
| 660 | |
|---|
| 661 | $win.bullet1 configure \ |
|---|
| 662 | -foreground [prefs get normalfg] \ |
|---|
| 663 | -background [prefs get normalbg] \ |
|---|
| 664 | |
|---|
| 665 | $win.bullet2 configure \ |
|---|
| 666 | -foreground [prefs get normalfg] \ |
|---|
| 667 | -background [prefs get normalbg] \ |
|---|
| 668 | |
|---|
| 669 | $win.bullet3 configure \ |
|---|
| 670 | -foreground [prefs get normalfg] \ |
|---|
| 671 | -background [prefs get normalbg] \ |
|---|
| 672 | |
|---|
| 673 | $hull configure \ |
|---|
| 674 | -foreground [prefs get normalfg] \ |
|---|
| 675 | -background [prefs get normalbg] \ |
|---|
| 676 | -font [prefs get bodytext] \ |
|---|
| 677 | -tabs [list ${tabWidth}i [expr $tabWidth*2]i] |
|---|
| 678 | |
|---|
| 679 | $hull tag configure title \ |
|---|
| 680 | -font [prefs get titletext] \ |
|---|
| 681 | -foreground [prefs get titlefg] \ |
|---|
| 682 | -background [prefs get titlebg] |
|---|
| 683 | |
|---|
| 684 | $hull tag configure header1 \ |
|---|
| 685 | -font [prefs get header1text] |
|---|
| 686 | |
|---|
| 687 | $hull tag configure header2 \ |
|---|
| 688 | -font [prefs get header2text] |
|---|
| 689 | |
|---|
| 690 | $hull tag configure header3 \ |
|---|
| 691 | -font [prefs get header3text] |
|---|
| 692 | |
|---|
| 693 | $hull tag configure small \ |
|---|
| 694 | -font [prefs get smalltext] |
|---|
| 695 | |
|---|
| 696 | $hull tag configure bold \ |
|---|
| 697 | -font [concat [prefs get bodytext] bold] |
|---|
| 698 | |
|---|
| 699 | $hull tag configure italic \ |
|---|
| 700 | -font [concat [prefs get bodytext] italic] |
|---|
| 701 | |
|---|
| 702 | $hull tag configure bolditalic \ |
|---|
| 703 | -font [concat [prefs get bodytext] [list bold italic]] |
|---|
| 704 | |
|---|
| 705 | $hull tag configure mono \ |
|---|
| 706 | -font [prefs get monotext] |
|---|
| 707 | |
|---|
| 708 | $hull tag configure monobold \ |
|---|
| 709 | -font [concat [prefs get monotext] bold] |
|---|
| 710 | |
|---|
| 711 | $hull tag configure monoitalic \ |
|---|
| 712 | -font [concat [prefs get monotext] italic] |
|---|
| 713 | |
|---|
| 714 | $hull tag configure monobolditalic \ |
|---|
| 715 | -font [concat [prefs get monotext] [list bold italic]] |
|---|
| 716 | |
|---|
| 717 | $hull tag configure strike \ |
|---|
| 718 | -overstrike 1 |
|---|
| 719 | |
|---|
| 720 | $hull tag configure link \ |
|---|
| 721 | -foreground [prefs get linkfg] \ |
|---|
| 722 | -background [prefs get linkbg] |
|---|
| 723 | |
|---|
| 724 | $hull tag configure warning \ |
|---|
| 725 | -foreground [prefs get warningfg] \ |
|---|
| 726 | -background [prefs get warningbg] |
|---|
| 727 | |
|---|
| 728 | $hull tag configure warningmono \ |
|---|
| 729 | -font [prefs get monotext] \ |
|---|
| 730 | -foreground [prefs get warningfg] \ |
|---|
| 731 | -background [prefs get warningbg] |
|---|
| 732 | |
|---|
| 733 | $hull tag configure button \ |
|---|
| 734 | -foreground [prefs get buttonfg] \ |
|---|
| 735 | -background [prefs get buttonbg] |
|---|
| 736 | |
|---|
| 737 | $hull tag configure macroerror \ |
|---|
| 738 | -font [prefs get monotext] \ |
|---|
| 739 | -foreground [prefs get warningfg] \ |
|---|
| 740 | -background [prefs get warningbg] |
|---|
| 741 | |
|---|
| 742 | $hull tag configure pre \ |
|---|
| 743 | -font [prefs get monotext] \ |
|---|
| 744 | -foreground [prefs get prefg] \ |
|---|
| 745 | -background [prefs get prebg] |
|---|
| 746 | |
|---|
| 747 | $hull tag configure tcl \ |
|---|
| 748 | -font [prefs get monotext] \ |
|---|
| 749 | -foreground [prefs get tclfg] \ |
|---|
| 750 | -background [prefs get tclbg] |
|---|
| 751 | |
|---|
| 752 | $hull tag configure search \ |
|---|
| 753 | -foreground [prefs get searchfg] \ |
|---|
| 754 | -background [prefs get searchbg] |
|---|
| 755 | |
|---|
| 756 | # Up to 9 levels of indent |
|---|
| 757 | for {set i 1} {$i <= 9} {incr i} { |
|---|
| 758 | $hull tag configure "indent$i" \ |
|---|
| 759 | -lmargin2 [expr $i*$tabWidth]i |
|---|
| 760 | } |
|---|
| 761 | |
|---|
| 762 | # Give highest priority to the selection to make it visible when some |
|---|
| 763 | # text with a non-default background is selected |
|---|
| 764 | $hull tag raise sel |
|---|
| 765 | } |
|---|
| 766 | |
|---|
| 767 | # Inserts a horizontal line into the pane by creating a frame widget. |
|---|
| 768 | method InsertHLine {} { |
|---|
| 769 | # First, create the frame as a child of the pane. |
|---|
| 770 | incr counter |
|---|
| 771 | set f $win.h$counter |
|---|
| 772 | |
|---|
| 773 | set width [expr {[winfo reqwidth $win] - 20}] |
|---|
| 774 | |
|---|
| 775 | frame $f -height 4 -width $width -background white \ |
|---|
| 776 | -borderwidth 2 -relief groove |
|---|
| 777 | |
|---|
| 778 | # Next, insert it into the pane. |
|---|
| 779 | $hull window create end -window $f -align center -pady 3 |
|---|
| 780 | $hull insert end "\n" pre |
|---|
| 781 | } |
|---|
| 782 | |
|---|
| 783 | # Removes leading and trailing whitespace, and reduces internal whitespace |
|---|
| 784 | # sequences to one space. |
|---|
| 785 | proc NormalizeSpace {text} { |
|---|
| 786 | regsub -all {\n} $text " " text |
|---|
| 787 | regsub -all {\s+} $text " " text |
|---|
| 788 | |
|---|
| 789 | return [string trim $text] |
|---|
| 790 | } |
|---|
| 791 | |
|---|
| 792 | # Reduces internal whitespace sequences which contain a newline |
|---|
| 793 | # to a single space. Other whitespace is left alone. |
|---|
| 794 | proc NormalizeNewlines {text} { |
|---|
| 795 | regsub -all {\s*\n\s*} $text " " text |
|---|
| 796 | |
|---|
| 797 | return $text |
|---|
| 798 | } |
|---|
| 799 | |
|---|
| 800 | # Parses an image request, and loads and inserts the image. |
|---|
| 801 | method InsertImage {arglist} { |
|---|
| 802 | set fileName [file join $options(-dbdir) [lindex $arglist 1]] |
|---|
| 803 | |
|---|
| 804 | array set opts [lindex $arglist 2] |
|---|
| 805 | |
|---|
| 806 | if {$opts(-text) ne ""} { |
|---|
| 807 | set disptext "$opts(-text): $fileName" |
|---|
| 808 | } else { |
|---|
| 809 | set disptext $fileName |
|---|
| 810 | } |
|---|
| 811 | |
|---|
| 812 | try { |
|---|
| 813 | set images [LoadImage $fileName $opts(-width) $opts(-height)] |
|---|
| 814 | } catch -msg msg { |
|---|
| 815 | puts "Couldn't load '$fileName': $msg" |
|---|
| 816 | set images [ list $options(-missingimage) ] |
|---|
| 817 | } |
|---|
| 818 | |
|---|
| 819 | # NEXT, insert it into the text window. If there's only one |
|---|
| 820 | # image, just insert it normally; otherwise, insert the strips. |
|---|
| 821 | # If there's a list, insert them in sequence. |
|---|
| 822 | if {[llength $images] == 1} { |
|---|
| 823 | set imageIndex [$hull index insert] |
|---|
| 824 | set imageData($imageIndex) $disptext |
|---|
| 825 | $hull image create end -image [lindex $images 0] \ |
|---|
| 826 | -padx $opts(-padwidth) |
|---|
| 827 | |
|---|
| 828 | $hull tag add image $imageIndex |
|---|
| 829 | } else { |
|---|
| 830 | foreach img $images { |
|---|
| 831 | if {[$hull compare insert > "insert linestart"]} { |
|---|
| 832 | $hull insert insert "\n" |
|---|
| 833 | } |
|---|
| 834 | set imageIndex [$hull index insert] |
|---|
| 835 | set imageData($imageIndex) $disptext |
|---|
| 836 | $hull image create end -image $img \ |
|---|
| 837 | -padx $opts(-padwidth) |
|---|
| 838 | $hull tag add image $imageIndex |
|---|
| 839 | } |
|---|
| 840 | } |
|---|
| 841 | } |
|---|
| 842 | |
|---|
| 843 | # Destroys all loaded images |
|---|
| 844 | method FreeImages {} { |
|---|
| 845 | array unset imageData |
|---|
| 846 | |
|---|
| 847 | foreach img $imageList { |
|---|
| 848 | image delete $img |
|---|
| 849 | } |
|---|
| 850 | set imageList {} |
|---|
| 851 | } |
|---|
| 852 | |
|---|
| 853 | # Loads an image, subsampling down to the desired size. |
|---|
| 854 | # Pass 0 width, 0 height for the default size. |
|---|
| 855 | # If the image is "tall", it's broken into strips; |
|---|
| 856 | # this helps everything scroll better. |
|---|
| 857 | proc LoadImage {filename {width 0} {height 0}} { |
|---|
| 858 | puts "LoadImage $filename" |
|---|
| 859 | if { [ file readable $filename ] } { |
|---|
| 860 | # FIRST, load the image |
|---|
| 861 | set img [image create photo -file $filename] |
|---|
| 862 | } elseif { [ lsearch [ image names ] $filename ] != -1 } { |
|---|
| 863 | # It is a valid tk image |
|---|
| 864 | set img $filename |
|---|
| 865 | } else { |
|---|
| 866 | error "$filename does not reference a valid image" |
|---|
| 867 | } |
|---|
| 868 | # NEXT, if the width and height are both 0, scale it.. |
|---|
| 869 | if {$width > 0 || $height > 0} { |
|---|
| 870 | # FIRST, figure out how to scale it. |
|---|
| 871 | set iwidth [image width $img] |
|---|
| 872 | set iheight [image height $img] |
|---|
| 873 | |
|---|
| 874 | if {$width == 0} { |
|---|
| 875 | set width $iwidth |
|---|
| 876 | } |
|---|
| 877 | |
|---|
| 878 | if {$height == 0} { |
|---|
| 879 | set height $iheight |
|---|
| 880 | } |
|---|
| 881 | |
|---|
| 882 | set scale 1 |
|---|
| 883 | |
|---|
| 884 | while {$iheight/$scale > $height || |
|---|
| 885 | $iwidth/$scale > $width} { |
|---|
| 886 | incr scale |
|---|
| 887 | } |
|---|
| 888 | |
|---|
| 889 | # NEXT, scale the image, and delete the original. |
|---|
| 890 | set iheight [expr {$iheight/$scale}] |
|---|
| 891 | set iwidth [expr {$iwidth/$scale}] |
|---|
| 892 | set dest [image create photo] |
|---|
| 893 | $dest copy $img -subsample $scale |
|---|
| 894 | |
|---|
| 895 | image delete $img |
|---|
| 896 | |
|---|
| 897 | set img $dest |
|---|
| 898 | } |
|---|
| 899 | |
|---|
| 900 | # NEXT, if the image is tall, cut it into horizontal strips, |
|---|
| 901 | # and return a list of the strips. This allows the text |
|---|
| 902 | # widget to scroll more nicely. |
|---|
| 903 | set iheight [image height $img] |
|---|
| 904 | set iwidth [image width $img] |
|---|
| 905 | |
|---|
| 906 | set stripHeight 25 |
|---|
| 907 | |
|---|
| 908 | if {1 || $iheight <= $stripHeight} { |
|---|
| 909 | lappend imageList $img |
|---|
| 910 | |
|---|
| 911 | return [list $img] |
|---|
| 912 | } |
|---|
| 913 | |
|---|
| 914 | set iy 0 |
|---|
| 915 | set results {} |
|---|
| 916 | while {$iy < $iheight} { |
|---|
| 917 | if {$iy + $stripHeight > $iheight} { |
|---|
| 918 | set stripHeight [expr {$iheight - $iy}] |
|---|
| 919 | } |
|---|
| 920 | |
|---|
| 921 | set strip [image create photo] |
|---|
| 922 | $strip copy $img -from 0 $iy $iwidth [incr iy $stripHeight] |
|---|
| 923 | lappend results $strip |
|---|
| 924 | lappend imageList $strip |
|---|
| 925 | } |
|---|
| 926 | |
|---|
| 927 | # NEXT, we no longer need the image from which we took the strips. |
|---|
| 928 | image delete $img |
|---|
| 929 | |
|---|
| 930 | return $results |
|---|
| 931 | } |
|---|
| 932 | } |
|---|
| 933 | |
|---|
| 934 | package provide renderpane 2.1.3 |
|---|
