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// Copyright (C) 2024 Rubén Beltrán del Río
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see https://map.tranquil.systems.
import AppKit
extension Wmap {
class SyntaxHighlighter {
private var cachedSyntaxElements: [SyntaxElement] = []
private var lineToElementsMap: [Int: [SyntaxElement]] = [:]
func updateSyntaxElements(from parsedMap: [Entity]) {
cachedSyntaxElements = parsedMap.flatMap { $0.syntaxElements }
// Build line-to-elements mapping for fast lookup
lineToElementsMap.removeAll()
for element in cachedSyntaxElements {
let line = element.range.start.line
lineToElementsMap[line, default: []].append(element)
}
}
func applySyntaxHighlighting(textStorage: NSTextStorage, range: NSRange) {
// Get the line range that encompasses the edited range
let string = textStorage.string as NSString
let lineRange = string.lineRange(for: range)
// Apply highlighting to elements that intersect with the line range
for element in cachedSyntaxElements {
// Safely convert string range to NSRange with bounds checking
guard element.range.stringRange.lowerBound <= element.range.stringRange.upperBound,
element.range.stringRange.upperBound <= textStorage.string.endIndex
else {
continue
}
let nsRange = NSRange(element.range.stringRange, in: textStorage.string)
// Only process elements that intersect with our update area
guard nsRange.location != NSNotFound,
nsRange.location + nsRange.length <= textStorage.length,
NSIntersectionRange(nsRange, lineRange).length > 0
else {
continue
}
let color = colorForSyntaxType(element.type)
textStorage.addAttribute(.foregroundColor, value: color, range: nsRange)
}
}
private func colorForSyntaxType(_ type: SyntaxType) -> NSColor {
switch type {
case .keyword:
return NSColor.Theme.Syntax.option
case .vertexLabel:
return NSColor.Theme.Syntax.vertex
case .number:
return NSColor.Theme.Syntax.number
case .symbol:
return NSColor.Theme.Syntax.symbol
case .shape:
return NSColor.Theme.Syntax.option
case .text:
return NSColor.Theme.Syntax.text
case .punctuation:
return NSColor.Theme.Syntax.punctuation
case .stageNumber:
return NSColor.Theme.Syntax.option
}
}
}
}
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