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1/*
2 Copyright (C) 2024 Rubén Beltrán del Río
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see https://map.tranquil.systems.
16 */
17import Cocoa
18import SwiftUI
19
20class MapTextEditorController: NSViewController {
21
22 @Binding var document: MapDocument
23 var highlightRanges: [Range<String.Index>] {
24 didSet {
25 updateHighlights()
26 }
27 }
28
29 var selectedRange: Int {
30 didSet {
31 updateHighlights()
32 focusOnResult()
33 }
34 }
35
36 let onChange: () -> Void
37
38 private let vertexRegex = MapParsingPatterns.vertex
39 private let edgeRegex = MapParsingPatterns.edge
40 private let blockerRegex = MapParsingPatterns.blocker
41 private let opportunityRegex = MapParsingPatterns.opportunity
42 private let noteRegex = MapParsingPatterns.note
43 private let stageRegex = MapParsingPatterns.stage
44 private let groupRegex = MapParsingPatterns.group
45
46 private let changeDebouncer: Debouncer = Debouncer(seconds: 1)
47
48 init(
49 document: Binding<MapDocument>, highlightRanges: [Range<String.Index>], selectedRange: Int,
50 onChange: @escaping () -> Void
51 ) {
52 self._document = document
53 self.onChange = onChange
54 self.highlightRanges = highlightRanges
55 self.selectedRange = selectedRange
56 super.init(nibName: nil, bundle: nil)
57 }
58
59 required init?(coder: NSCoder) {
60 fatalError("init(coder:) has not been implemented")
61 }
62
63 override func loadView() {
64 let scrollView = NSTextView.scrollableTextView()
65 let textView = scrollView.documentView as! NSTextView
66
67 scrollView.translatesAutoresizingMaskIntoConstraints = false
68
69 textView.backgroundColor = .ui.background
70 textView.allowsUndo = true
71 textView.delegate = self
72 textView.textStorage?.delegate = self
73 textView.string = self.document.text
74 textView.isEditable = true
75 textView.font = .monospacedSystemFont(ofSize: 16.0, weight: .regular)
76 self.view = scrollView
77 }
78
79 override func viewDidAppear() {
80 self.view.window?.makeFirstResponder(self.view)
81 updateHighlights()
82 }
83
84 private var textView: NSTextView? {
85 return (view as? NSScrollView)?.documentView as? NSTextView
86 }
87
88 private func updateHighlights() {
89 if let textView {
90 if let textStorage = textView.textStorage {
91 textStorage.removeAttribute(
92 .backgroundColor, range: NSRange(location: 0, length: textStorage.length))
93
94 for range in highlightRanges {
95 let nsRange = NSRange(range, in: textStorage.string)
96
97 textStorage.addAttribute(.backgroundColor, value: NSColor.syntax.match, range: nsRange)
98 }
99
100 textView.needsDisplay = true
101
102 }
103 }
104 }
105
106 private func focusOnResult() {
107 if let textView {
108 if let textStorage = textView.textStorage {
109 if selectedRange < highlightRanges.count {
110 let range = highlightRanges[selectedRange]
111 let nsRange = NSRange(range, in: textStorage.string)
112 textView.scrollRangeToVisible(nsRange)
113 textView.selectedRange = nsRange
114 }
115 }
116 }
117 }
118
119 private func setSelectionColor() {
120 guard let textView = self.textView else { return }
121
122 var selectedTextAttributes = textView.selectedTextAttributes
123 selectedTextAttributes[.backgroundColor] = NSColor.yellow.withAlphaComponent(0.3)
124 textView.selectedTextAttributes = selectedTextAttributes
125 }
126}
127
128extension MapTextEditorController: NSTextViewDelegate {
129
130 func textDidChange(_ obj: Notification) {
131 if let textField = obj.object as? NSTextView {
132 self.document.text = textField.string
133
134 changeDebouncer.debounce {
135 DispatchQueue.main.async {
136 self.onChange()
137 }
138 }
139 }
140 }
141
142 func textView(_ view: NSTextView, shouldChangeTextIn: NSRange, replacementString: String?) -> Bool
143 {
144 let range = Range(shouldChangeTextIn, in: view.string)
145 let target = view.string[range!]
146
147 if target == "--" {
148 return false
149 }
150
151 return true
152 }
153}
154
155extension MapTextEditorController: NSTextStorageDelegate {
156
157 override func textStorageDidProcessEditing(_ obj: Notification) {
158 if let textStorage = obj.object as? NSTextStorage {
159 self.colorizeText(textStorage: textStorage)
160 }
161 }
162
163 private func colorizeText(textStorage: NSTextStorage) {
164 let range = NSMakeRange(0, textStorage.length)
165 var matches = vertexRegex.matches(in: textStorage.string, options: [], range: range)
166
167 for match in matches {
168 textStorage.addAttributes(
169 [.foregroundColor: NSColor.syntax.vertex], range: match.range(at: 1))
170 textStorage.addAttributes(
171 [.foregroundColor: NSColor.syntax.number], range: match.range(at: 2))
172 textStorage.addAttributes(
173 [.foregroundColor: NSColor.syntax.number], range: match.range(at: 3))
174 textStorage.addAttributes(
175 [.foregroundColor: NSColor.syntax.option], range: match.range(at: 4))
176 }
177
178 matches = edgeRegex.matches(in: textStorage.string, options: [], range: range)
179
180 for match in matches {
181 textStorage.addAttributes(
182 [.foregroundColor: NSColor.syntax.vertex], range: match.range(at: 1))
183 let arrowRange = match.range(at: 2)
184 textStorage.addAttributes(
185 [.foregroundColor: NSColor.syntax.symbol],
186 range: NSMakeRange(arrowRange.lowerBound - 1, arrowRange.length + 1))
187 textStorage.addAttributes(
188 [.foregroundColor: NSColor.syntax.vertex], range: match.range(at: 3))
189 }
190
191 matches = opportunityRegex.matches(in: textStorage.string, options: [], range: range)
192
193 for match in matches {
194 textStorage.addAttributes(
195 [.foregroundColor: NSColor.syntax.option], range: match.range(at: 1))
196 textStorage.addAttributes(
197 [.foregroundColor: NSColor.syntax.vertex], range: match.range(at: 2))
198 textStorage.addAttributes(
199 [.foregroundColor: NSColor.syntax.symbol], range: match.range(at: 3))
200 textStorage.addAttributes(
201 [.foregroundColor: NSColor.syntax.number], range: match.range(at: 4))
202 }
203
204 matches = blockerRegex.matches(in: textStorage.string, options: [], range: range)
205
206 for match in matches {
207 textStorage.addAttributes(
208 [.foregroundColor: NSColor.syntax.option], range: match.range(at: 1))
209 textStorage.addAttributes(
210 [.foregroundColor: NSColor.syntax.vertex], range: match.range(at: 2))
211 }
212
213 matches = noteRegex.matches(in: textStorage.string, options: [], range: range)
214
215 for match in matches {
216 textStorage.addAttributes(
217 [.foregroundColor: NSColor.syntax.option], range: match.range(at: 1))
218 textStorage.addAttributes(
219 [.foregroundColor: NSColor.syntax.number], range: match.range(at: 2))
220 textStorage.addAttributes(
221 [.foregroundColor: NSColor.syntax.number], range: match.range(at: 3))
222 }
223
224 matches = stageRegex.matches(in: textStorage.string, options: [], range: range)
225
226 for match in matches {
227 textStorage.addAttributes(
228 [.foregroundColor: NSColor.syntax.option], range: match.range(at: 1))
229 textStorage.addAttributes(
230 [.foregroundColor: NSColor.syntax.number], range: match.range(at: 2))
231 }
232
233 matches = groupRegex.matches(in: textStorage.string, options: [], range: range)
234
235 for match in matches {
236 textStorage.addAttributes(
237 [.foregroundColor: NSColor.syntax.option], range: match.range(at: 1))
238 textStorage.addAttributes(
239 [.foregroundColor: NSColor.syntax.vertex], range: match.range(at: 2))
240 }
241 }
242}
243
244struct MapTextEditor: NSViewControllerRepresentable {
245
246 @Binding var document: MapDocument
247 var highlightRanges: [Range<String.Index>]
248 var selectedRange: Int
249 var onChange: () -> Void = {}
250
251 func makeNSViewController(
252 context: NSViewControllerRepresentableContext<MapTextEditor>
253 ) -> MapTextEditorController {
254 return MapTextEditorController(
255 document: $document, highlightRanges: highlightRanges, selectedRange: selectedRange,
256 onChange: onChange)
257 }
258
259 func updateNSViewController(
260 _ nsViewController: MapTextEditorController,
261 context: NSViewControllerRepresentableContext<MapTextEditor>
262 ) {
263 nsViewController.highlightRanges = highlightRanges
264 nsViewController.selectedRange = selectedRange
265 }
266}