55 lines
1.4 KiB
Lua
55 lines
1.4 KiB
Lua
-- primitives for editing text
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Text = {}
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function Text.draw(line, line_index, cursor_line, y, cursor_pos)
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love.graphics.setColor(0,0,0)
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local love_text = love.graphics.newText(love.graphics.getFont(), line.data)
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love.graphics.draw(love_text, 25,y, 0, Zoom)
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if line_index == cursor_line then
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-- cursor
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love.graphics.print('_', Text.cursor_x(line.data, cursor_pos), y+6) -- drop the cursor down a bit to account for the increased font size
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end
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end
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function Text.nearest_cursor_pos(line, x, hint)
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if x == 0 then
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return 1
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end
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local max_x = Text.cursor_x(line, #line+1)
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if x > max_x then
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return #line+1
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end
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local currx = Text.cursor_x(line, hint)
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if currx > x-2 and currx < x+2 then
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return hint
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end
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local left, right = 1, #line+1
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if currx > x then
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right = hint
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else
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left = hint
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end
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while left < right-1 do
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local curr = math.floor((left+right)/2)
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local currxmin = Text.cursor_x(line, curr)
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local currxmax = Text.cursor_x(line, curr+1)
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if currxmin <= x and x < currxmax then
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return curr
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end
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if currxmin > x then
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right = curr
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else
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left = curr
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end
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end
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return right
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end
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function Text.cursor_x(line_data, cursor_pos)
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local line_before_cursor = line_data:sub(1, cursor_pos-1)
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local text_before_cursor = love.graphics.newText(love.graphics.getFont(), line_before_cursor)
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return 25+text_before_cursor:getWidth()*Zoom
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end
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return Text
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