Lumacs/test_highlight.lua

-- Test script for syntax highlighting API
print("Testing syntax highlighting API...")

-- Simple function to highlight keywords in a line
function highlight_keywords(buf, line_num, keywords)
    local line_text = buf:line(line_num)

    for _, keyword in ipairs(keywords) do
        -- Find all occurrences of this keyword
        local start_pos = 1
        while true do
            local pos = string.find(line_text, keyword, start_pos, true)
            if not pos then break end

            -- Create a range for this keyword
            local range = lumacs.Range(
                lumacs.Position(line_num, pos - 1),
                lumacs.Position(line_num, pos + #keyword - 1)
            )

            -- Create text attribute for keywords (blue, bold)
            local attr = lumacs.TextAttribute(
                lumacs.ColorType.Keyword,
                lumacs.Style.Bold
            )

            -- Set the style
            buf:set_style(range, attr)

            message(string.format("Highlighted '%s' at line %d, col %d-%d",
                keyword, line_num, pos-1, pos+#keyword-1))

            start_pos = pos + #keyword
        end
    end
end

-- Test it on the buffer
local buf = editor.buffer
local keywords = {"function", "local", "end", "if", "then", "for", "while"}

-- Highlight keywords in all lines
for line = 0, buf:line_count() - 1 do
    highlight_keywords(buf, line, keywords)
end

-- Check what styles we have on line 0
local styles = buf:get_line_styles(0)
message(string.format("Line 0 has %d styled ranges", #styles))

message("Syntax highlighting test complete!")