2022-05-18 04:29:08 +01:00
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-- primitives for editing text
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Text = {}
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2022-05-18 06:36:10 +01:00
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local utf8 = require 'utf8'
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2022-05-21 06:18:39 +01:00
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local Debug_new_render = false
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2022-05-21 02:16:13 +01:00
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2022-05-22 04:52:44 +01:00
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-- return values:
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-- y coordinate drawn until in px
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-- position of start of final screen line drawn
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2022-05-20 14:09:37 +01:00
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function Text.draw(line, line_width, line_index)
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2022-05-18 04:29:08 +01:00
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love.graphics.setColor(0,0,0)
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2022-05-20 01:29:14 +01:00
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-- wrap long lines
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local x = 25
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local y = line.y
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local pos = 1
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2022-05-22 04:52:44 +01:00
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local screen_line_starting_pos = 1
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2022-05-20 01:29:14 +01:00
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if line.fragments == nil then
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Text.compute_fragments(line, line_width)
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2022-05-18 04:29:08 +01:00
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end
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2022-05-22 00:41:34 +01:00
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line.screen_line_starting_pos = nil -- TODO: avoid recomputing on every repaint
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2022-05-21 06:16:51 +01:00
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if Debug_new_render then print('--') end
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2022-05-20 01:29:14 +01:00
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for _, f in ipairs(line.fragments) do
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local frag, frag_text = f.data, f.text
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-- render fragment
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local frag_width = math.floor(frag_text:getWidth()*Zoom)
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if x + frag_width > line_width then
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assert(x > 25) -- no overfull lines
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2022-05-22 00:24:07 +01:00
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if line_index > Screen_top1.line or pos > Screen_top1.pos then
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2022-05-20 14:58:17 +01:00
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y = y + math.floor(15*Zoom)
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2022-05-22 06:08:13 +01:00
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if New_foo then print('text: new screen line', y, Screen_height, screen_line_starting_pos) end
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2022-05-22 04:52:44 +01:00
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screen_line_starting_pos = pos
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2022-05-21 06:16:51 +01:00
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if Debug_new_render then print('y', y) end
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2022-05-20 14:58:17 +01:00
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end
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2022-05-20 01:29:14 +01:00
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x = 25
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2022-05-20 06:07:12 +01:00
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if line.screen_line_starting_pos == nil then
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line.screen_line_starting_pos = {1, pos}
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else
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table.insert(line.screen_line_starting_pos, pos)
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end
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2022-05-22 06:08:13 +01:00
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if line_index > Screen_top1.line or pos > Screen_top1.pos then
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if y + math.floor(15*Zoom) >= Screen_height then
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return y, screen_line_starting_pos
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end
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end
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2022-05-20 01:29:14 +01:00
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end
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2022-05-22 00:24:07 +01:00
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if Debug_new_render then print('checking to draw', pos, Screen_top1.pos) end
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if line_index > Screen_top1.line or pos >= Screen_top1.pos then
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2022-05-21 06:16:51 +01:00
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if Debug_new_render then print('drawing '..frag) end
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2022-05-20 14:58:17 +01:00
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love.graphics.draw(frag_text, x,y, 0, Zoom)
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end
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2022-05-20 01:29:14 +01:00
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-- render cursor if necessary
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local frag_len = utf8.len(frag)
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2022-05-22 00:24:07 +01:00
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if line_index == Cursor1.line then
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if pos <= Cursor1.pos and pos + frag_len > Cursor1.pos then
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Text.draw_cursor(x+Text.cursor_x2(frag, Cursor1.pos-pos+1), y)
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2022-05-20 01:29:14 +01:00
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end
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end
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x = x + frag_width
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pos = pos + frag_len
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end
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2022-05-22 00:24:07 +01:00
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if line_index == Cursor1.line and Cursor1.pos == pos then
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2022-05-20 13:40:42 +01:00
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Text.draw_cursor(x, y)
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2022-05-20 06:35:26 +01:00
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end
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2022-05-21 06:16:51 +01:00
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Debug_new_render = false
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2022-05-22 04:52:44 +01:00
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return y, screen_line_starting_pos
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2022-05-18 04:29:08 +01:00
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end
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2022-05-20 01:29:14 +01:00
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-- manual tests:
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-- draw with small line_width of 100
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-- short words break on spaces
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-- long words break when they must
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2022-05-18 04:29:08 +01:00
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2022-05-20 13:40:42 +01:00
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function Text.draw_cursor(x, y)
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love.graphics.setColor(1,0,0)
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love.graphics.circle('fill', x,y+math.floor(15*Zoom), 2)
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love.graphics.setColor(0,0,0)
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2022-05-20 13:41:25 +01:00
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Cursor_x = x
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Cursor_y = y+math.floor(15*Zoom)
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2022-05-20 13:40:42 +01:00
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end
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2022-05-20 06:58:04 +01:00
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function Text.compute_fragments(line, line_width)
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line.fragments = {}
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local x = 25
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-- try to wrap at word boundaries
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for frag in line.data:gmatch('%S*%s*') do
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local frag_text = love.graphics.newText(love.graphics.getFont(), frag)
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local frag_width = math.floor(frag_text:getWidth()*Zoom)
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--? print('x: '..tostring(x)..'; '..tostring(line_width-x)..'px to go')
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--? print('frag: ^'..frag..'$ is '..tostring(frag_width)..'px wide')
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if x + frag_width > line_width then
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while x + frag_width > line_width do
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if x < 0.8*line_width then
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-- long word; chop it at some letter
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-- We're not going to reimplement TeX here.
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local b = Text.nearest_cursor_pos(frag, line_width - x)
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--? print('space for '..tostring(b)..' graphemes')
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local frag1 = string.sub(frag, 1, b)
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local frag1_text = love.graphics.newText(love.graphics.getFont(), frag1)
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local frag1_width = math.floor(frag1_text:getWidth()*Zoom)
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--? print('inserting '..frag1..' of width '..tostring(frag1_width)..'px')
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table.insert(line.fragments, {data=frag1, text=frag1_text})
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frag = string.sub(frag, b+1)
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frag_text = love.graphics.newText(love.graphics.getFont(), frag)
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frag_width = math.floor(frag_text:getWidth()*Zoom)
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end
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x = 25 -- new line
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end
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end
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if #frag > 0 then
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--? print('inserting '..frag..' of width '..tostring(frag_width)..'px')
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table.insert(line.fragments, {data=frag, text=frag_text})
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end
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end
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end
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2022-05-21 22:03:06 +01:00
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function Text.textinput(t)
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2022-05-18 06:36:10 +01:00
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if love.mouse.isDown('1') then return end
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2022-05-19 04:22:57 +01:00
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Text.insert_at_cursor(t)
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end
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function Text.insert_at_cursor(t)
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2022-05-18 06:36:10 +01:00
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local byte_offset
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2022-05-22 00:24:07 +01:00
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if Cursor1.pos > 1 then
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byte_offset = utf8.offset(Lines[Cursor1.line].data, Cursor1.pos-1)
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2022-05-18 06:36:10 +01:00
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else
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byte_offset = 0
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end
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].data = string.sub(Lines[Cursor1.line].data, 1, byte_offset)..t..string.sub(Lines[Cursor1.line].data, byte_offset+1)
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Lines[Cursor1.line].fragments = nil
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Cursor1.pos = Cursor1.pos+1
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2022-05-18 06:36:10 +01:00
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end
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-- Don't handle any keys here that would trigger love.textinput above.
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function Text.keychord_pressed(chord)
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2022-05-21 06:18:39 +01:00
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--? Debug_new_render = true
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2022-05-18 06:36:10 +01:00
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if chord == 'return' then
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2022-05-22 00:24:07 +01:00
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local byte_offset = utf8.offset(Lines[Cursor1.line].data, Cursor1.pos)
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table.insert(Lines, Cursor1.line+1, {mode='text', data=string.sub(Lines[Cursor1.line].data, byte_offset)})
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Lines[Cursor1.line].data = string.sub(Lines[Cursor1.line].data, 1, byte_offset-1)
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Lines[Cursor1.line].fragments = nil
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Cursor1.line = Cursor1.line+1
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Cursor1.pos = 1
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2022-05-18 06:36:10 +01:00
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save_to_disk(Lines, Filename)
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2022-05-19 04:22:57 +01:00
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elseif chord == 'tab' then
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Text.insert_at_cursor('\t')
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save_to_disk(Lines, Filename)
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2022-05-18 06:36:10 +01:00
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elseif chord == 'left' then
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2022-05-22 00:24:07 +01:00
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assert(Lines[Cursor1.line].mode == 'text')
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if Cursor1.pos > 1 then
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Cursor1.pos = Cursor1.pos-1
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2022-05-18 06:36:10 +01:00
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else
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2022-05-22 00:24:07 +01:00
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local new_cursor_line = Cursor1.line
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2022-05-18 06:36:10 +01:00
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while new_cursor_line > 1 do
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new_cursor_line = new_cursor_line-1
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if Lines[new_cursor_line].mode == 'text' then
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2022-05-22 00:24:07 +01:00
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Cursor1.line = new_cursor_line
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Cursor1.pos = utf8.len(Lines[Cursor1.line].data) + 1
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2022-05-18 06:36:10 +01:00
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break
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end
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end
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2022-05-22 00:24:07 +01:00
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if Cursor1.line < Screen_top1.line then
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Screen_top1.line = Cursor1.line
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2022-05-19 01:22:04 +01:00
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end
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2022-05-18 06:36:10 +01:00
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end
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elseif chord == 'right' then
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2022-05-22 00:24:07 +01:00
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assert(Lines[Cursor1.line].mode == 'text')
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if Cursor1.pos <= utf8.len(Lines[Cursor1.line].data) then
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Cursor1.pos = Cursor1.pos+1
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2022-05-18 06:36:10 +01:00
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else
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2022-05-22 00:24:07 +01:00
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local new_cursor_line = Cursor1.line
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2022-05-18 06:36:10 +01:00
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while new_cursor_line <= #Lines-1 do
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new_cursor_line = new_cursor_line+1
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if Lines[new_cursor_line].mode == 'text' then
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2022-05-22 00:24:07 +01:00
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Cursor1.line = new_cursor_line
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Cursor1.pos = 1
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2022-05-18 06:36:10 +01:00
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break
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end
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end
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2022-05-22 00:24:07 +01:00
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if Cursor1.line > Screen_bottom1.line then
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Screen_top1.line = Cursor1.line
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2022-05-19 01:22:04 +01:00
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end
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2022-05-18 06:36:10 +01:00
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end
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elseif chord == 'home' then
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2022-05-22 00:24:07 +01:00
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Cursor1.pos = 1
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2022-05-18 06:36:10 +01:00
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elseif chord == 'end' then
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2022-05-22 00:24:07 +01:00
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Cursor1.pos = utf8.len(Lines[Cursor1.line].data) + 1
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2022-05-18 06:36:10 +01:00
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elseif chord == 'backspace' then
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2022-05-22 00:24:07 +01:00
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if Cursor1.pos > 1 then
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local byte_start = utf8.offset(Lines[Cursor1.line].data, Cursor1.pos-1)
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local byte_end = utf8.offset(Lines[Cursor1.line].data, Cursor1.pos)
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2022-05-18 06:36:10 +01:00
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if byte_start then
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if byte_end then
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].data = string.sub(Lines[Cursor1.line].data, 1, byte_start-1)..string.sub(Lines[Cursor1.line].data, byte_end)
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2022-05-18 06:36:10 +01:00
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else
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].data = string.sub(Lines[Cursor1.line].data, 1, byte_start-1)
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2022-05-18 06:36:10 +01:00
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end
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].fragments = nil
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Cursor1.pos = Cursor1.pos-1
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2022-05-18 06:36:10 +01:00
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end
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2022-05-22 00:24:07 +01:00
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elseif Cursor1.line > 1 then
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if Lines[Cursor1.line-1].mode == 'drawing' then
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table.remove(Lines, Cursor1.line-1)
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2022-05-18 06:36:10 +01:00
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else
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-- join lines
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2022-05-22 00:24:07 +01:00
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Cursor1.pos = utf8.len(Lines[Cursor1.line-1].data)+1
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Lines[Cursor1.line-1].data = Lines[Cursor1.line-1].data..Lines[Cursor1.line].data
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Lines[Cursor1.line-1].fragments = nil
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table.remove(Lines, Cursor1.line)
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2022-05-18 06:36:10 +01:00
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end
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2022-05-22 00:24:07 +01:00
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Cursor1.line = Cursor1.line-1
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2022-05-18 06:36:10 +01:00
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end
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save_to_disk(Lines, Filename)
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elseif chord == 'delete' then
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2022-05-22 00:24:07 +01:00
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if Cursor1.pos <= utf8.len(Lines[Cursor1.line].data) then
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local byte_start = utf8.offset(Lines[Cursor1.line].data, Cursor1.pos)
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local byte_end = utf8.offset(Lines[Cursor1.line].data, Cursor1.pos+1)
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2022-05-18 06:36:10 +01:00
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if byte_start then
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if byte_end then
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].data = string.sub(Lines[Cursor1.line].data, 1, byte_start-1)..string.sub(Lines[Cursor1.line].data, byte_end)
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2022-05-18 06:36:10 +01:00
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else
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].data = string.sub(Lines[Cursor1.line].data, 1, byte_start-1)
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2022-05-18 06:36:10 +01:00
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end
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].fragments = nil
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-- no change to Cursor1.pos
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2022-05-18 06:36:10 +01:00
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end
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2022-05-22 00:24:07 +01:00
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elseif Cursor1.line < #Lines then
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if Lines[Cursor1.line+1].mode == 'drawing' then
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table.remove(Lines, Cursor1.line+1)
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2022-05-18 06:36:10 +01:00
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else
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-- join lines
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2022-05-22 00:24:07 +01:00
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Lines[Cursor1.line].data = Lines[Cursor1.line].data..Lines[Cursor1.line+1].data
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Lines[Cursor1.line].fragments = nil
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table.remove(Lines, Cursor1.line+1)
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2022-05-18 06:36:10 +01:00
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end
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end
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save_to_disk(Lines, Filename)
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elseif chord == 'up' then
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2022-05-22 00:24:07 +01:00
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assert(Lines[Cursor1.line].mode == 'text')
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--? print('up', Cursor1.pos, Screen_top1.pos)
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2022-05-21 00:41:21 +01:00
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local screen_line_index,screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line()
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if screen_line_starting_pos == 1 then
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2022-05-21 06:46:32 +01:00
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--? print('cursor is at first screen line of its line')
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2022-05-21 04:32:00 +01:00
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-- line is done; skip to previous text line
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2022-05-22 00:24:07 +01:00
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local new_cursor_line = Cursor1.line
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2022-05-20 16:55:45 +01:00
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while new_cursor_line > 1 do
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new_cursor_line = new_cursor_line-1
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if Lines[new_cursor_line].mode == 'text' then
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2022-05-22 00:24:07 +01:00
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Cursor1.line = new_cursor_line
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if Lines[Cursor1.line].screen_line_starting_pos == nil then
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Cursor1.pos = Text.nearest_cursor_pos(Lines[Cursor1.line].data, Cursor_x)
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2022-05-20 23:19:43 +01:00
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break
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|
|
|
end
|
2022-05-21 04:32:00 +01:00
|
|
|
-- previous text line found, pick its final screen line
|
2022-05-22 00:24:07 +01:00
|
|
|
local screen_line_starting_pos = Lines[Cursor1.line].screen_line_starting_pos
|
2022-05-20 23:19:43 +01:00
|
|
|
screen_line_starting_pos = screen_line_starting_pos[#screen_line_starting_pos]
|
2022-05-21 06:46:32 +01:00
|
|
|
--? print('previous screen line starts at pos '..tostring(screen_line_starting_pos)..' of its line')
|
2022-05-22 00:24:07 +01:00
|
|
|
if Screen_top1.line == Cursor1.line and Screen_top1.pos == screen_line_starting_pos then
|
|
|
|
Screen_top1.pos = screen_line_starting_pos
|
|
|
|
--? print('pos of top of screen is also '..tostring(Screen_top1.pos)..' of the same line')
|
2022-05-21 00:41:21 +01:00
|
|
|
end
|
2022-05-22 00:24:07 +01:00
|
|
|
local s = string.sub(Lines[Cursor1.line].data, screen_line_starting_pos)
|
|
|
|
Cursor1.pos = screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1
|
2022-05-20 16:55:45 +01:00
|
|
|
break
|
|
|
|
end
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
2022-05-22 00:24:07 +01:00
|
|
|
if Cursor1.line < Screen_top1.line then
|
|
|
|
Screen_top1.line = Cursor1.line
|
2022-05-20 16:55:45 +01:00
|
|
|
end
|
|
|
|
else
|
2022-05-21 04:32:00 +01:00
|
|
|
-- move up one screen line in current line
|
2022-05-21 06:46:32 +01:00
|
|
|
--? print('cursor is NOT at first screen line of its line')
|
2022-05-20 16:55:45 +01:00
|
|
|
assert(screen_line_index > 1)
|
2022-05-22 00:24:07 +01:00
|
|
|
new_screen_line_starting_pos = Lines[Cursor1.line].screen_line_starting_pos[screen_line_index-1]
|
2022-05-21 06:46:32 +01:00
|
|
|
--? print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos))
|
2022-05-22 00:24:07 +01:00
|
|
|
if Screen_top1.line == Cursor1.line and Screen_top1.pos == screen_line_starting_pos then
|
|
|
|
Screen_top1.pos = new_screen_line_starting_pos
|
|
|
|
--? print('also setting pos of top of screen to '..tostring(Screen_top1.pos))
|
2022-05-21 00:41:21 +01:00
|
|
|
end
|
2022-05-22 00:24:07 +01:00
|
|
|
local s = string.sub(Lines[Cursor1.line].data, new_screen_line_starting_pos)
|
|
|
|
Cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1
|
|
|
|
--? print('cursor pos is now '..tostring(Cursor1.pos))
|
2022-05-19 01:22:04 +01:00
|
|
|
end
|
2022-05-18 06:36:10 +01:00
|
|
|
elseif chord == 'down' then
|
2022-05-22 00:24:07 +01:00
|
|
|
assert(Lines[Cursor1.line].mode == 'text')
|
2022-05-22 06:08:13 +01:00
|
|
|
print('down', Cursor1.line, Cursor1.pos, Screen_top1.line, Screen_top1.pos, Screen_bottom1.line, Screen_bottom1.pos)
|
2022-05-21 04:33:30 +01:00
|
|
|
if Text.cursor_at_final_screen_line() then
|
|
|
|
-- line is done, skip to next text line
|
2022-05-22 06:08:13 +01:00
|
|
|
print('cursor at final screen line of its line')
|
|
|
|
--? os.exit(1)
|
2022-05-22 00:24:07 +01:00
|
|
|
local new_cursor_line = Cursor1.line
|
2022-05-21 04:33:30 +01:00
|
|
|
while new_cursor_line < #Lines do
|
|
|
|
new_cursor_line = new_cursor_line+1
|
|
|
|
if Lines[new_cursor_line].mode == 'text' then
|
2022-05-22 00:24:07 +01:00
|
|
|
Cursor1.line = new_cursor_line
|
|
|
|
Cursor1.pos = Text.nearest_cursor_pos(Lines[Cursor1.line].data, Cursor_x)
|
2022-05-22 06:08:13 +01:00
|
|
|
print(Cursor1.pos)
|
2022-05-21 04:33:30 +01:00
|
|
|
break
|
|
|
|
end
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
2022-05-22 00:24:07 +01:00
|
|
|
if Cursor1.line > Screen_bottom1.line then
|
2022-05-22 06:08:13 +01:00
|
|
|
print('screen top before:', Screen_top1.line, Screen_top1.pos)
|
2022-05-22 00:24:07 +01:00
|
|
|
Screen_top1.line = Cursor1.line
|
2022-05-22 06:08:13 +01:00
|
|
|
print('scroll up preserving cursor')
|
2022-05-21 04:33:30 +01:00
|
|
|
Text.scroll_up_while_cursor_on_screen()
|
2022-05-22 06:08:13 +01:00
|
|
|
print('screen top after:', Screen_top1.line, Screen_top1.pos)
|
2022-05-21 04:33:30 +01:00
|
|
|
end
|
|
|
|
else
|
|
|
|
-- move down one screen line in current line
|
2022-05-22 06:08:13 +01:00
|
|
|
print('cursor is NOT at final screen line of its line')
|
2022-05-21 04:33:30 +01:00
|
|
|
local screen_line_index, screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line()
|
2022-05-22 00:24:07 +01:00
|
|
|
new_screen_line_starting_pos = Lines[Cursor1.line].screen_line_starting_pos[screen_line_index+1]
|
2022-05-22 06:08:13 +01:00
|
|
|
print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos))
|
2022-05-22 00:24:07 +01:00
|
|
|
local s = string.sub(Lines[Cursor1.line].data, new_screen_line_starting_pos)
|
|
|
|
Cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1
|
2022-05-22 07:02:04 +01:00
|
|
|
print('cursor pos is now', Cursor1.line, Cursor1.pos)
|
2022-05-22 00:24:07 +01:00
|
|
|
Screen_top1.line = Cursor1.line
|
2022-05-22 06:08:13 +01:00
|
|
|
print('scroll up preserving cursor')
|
2022-05-21 04:33:30 +01:00
|
|
|
Text.scroll_up_while_cursor_on_screen()
|
2022-05-22 06:08:13 +01:00
|
|
|
print('screen top after:', Screen_top1.line, Screen_top1.pos)
|
2022-05-19 01:22:04 +01:00
|
|
|
end
|
2022-05-22 06:08:13 +01:00
|
|
|
print('=>', Cursor1.line, Cursor1.pos, Screen_top1.line, Screen_top1.pos, Screen_bottom1.line, Screen_bottom1.pos)
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-05-21 00:41:21 +01:00
|
|
|
function Text.pos_at_start_of_cursor_screen_line()
|
2022-05-22 00:24:07 +01:00
|
|
|
if Lines[Cursor1.line].screen_line_starting_pos == nil then
|
2022-05-21 00:41:21 +01:00
|
|
|
return 1,1
|
|
|
|
end
|
2022-05-22 00:24:07 +01:00
|
|
|
for i=#Lines[Cursor1.line].screen_line_starting_pos,1,-1 do
|
|
|
|
local spos = Lines[Cursor1.line].screen_line_starting_pos[i]
|
|
|
|
if spos <= Cursor1.pos then
|
2022-05-21 00:41:21 +01:00
|
|
|
return i,spos
|
|
|
|
end
|
|
|
|
end
|
|
|
|
assert(false)
|
|
|
|
end
|
|
|
|
|
2022-05-21 04:33:30 +01:00
|
|
|
function Text.cursor_at_final_screen_line()
|
2022-05-22 00:24:07 +01:00
|
|
|
if Lines[Cursor1.line].screen_line_starting_pos == nil then
|
2022-05-21 04:33:30 +01:00
|
|
|
return true
|
|
|
|
end
|
2022-05-22 05:08:21 +01:00
|
|
|
screen_lines = Lines[Cursor1.line].screen_line_starting_pos
|
2022-05-22 06:08:13 +01:00
|
|
|
print(screen_lines[#screen_lines], Cursor1.pos)
|
2022-05-22 05:08:21 +01:00
|
|
|
return screen_lines[#screen_lines] <= Cursor1.pos
|
2022-05-21 04:33:30 +01:00
|
|
|
end
|
|
|
|
|
2022-05-19 02:19:27 +01:00
|
|
|
function Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary()
|
2022-05-22 00:24:07 +01:00
|
|
|
while Cursor1.line <= #Lines do
|
|
|
|
if Lines[Cursor1.line].mode == 'text' then
|
2022-05-19 02:19:27 +01:00
|
|
|
break
|
|
|
|
end
|
2022-05-22 00:24:07 +01:00
|
|
|
Cursor1.line = Cursor1.line + 1
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
|
|
|
-- hack: insert a text line at bottom of file if necessary
|
2022-05-22 00:24:07 +01:00
|
|
|
if Cursor1.line > #Lines then
|
|
|
|
assert(Cursor1.line == #Lines+1)
|
2022-05-19 02:19:27 +01:00
|
|
|
table.insert(Lines, {mode='text', data=''})
|
|
|
|
end
|
2022-05-22 00:24:07 +01:00
|
|
|
if Cursor1.line > Screen_bottom1.line then
|
|
|
|
Screen_top1.line = Cursor1.line
|
2022-05-19 02:19:27 +01:00
|
|
|
Text.scroll_up_while_cursor_on_screen()
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
function Text.scroll_up_while_cursor_on_screen()
|
2022-05-22 07:02:04 +01:00
|
|
|
local top2 = Text.to2(Cursor1)
|
|
|
|
--? print('cursor pos '..tostring(Cursor1.pos)..' is on the #'..tostring(top2.screen_line)..' screen line down')
|
|
|
|
local y = Screen_height - math.floor(15*Zoom)
|
2022-05-21 06:43:09 +01:00
|
|
|
-- duplicate some logic from love.draw
|
2022-05-19 02:19:27 +01:00
|
|
|
while true do
|
2022-05-22 07:02:04 +01:00
|
|
|
--? print(y, 'top2:', top2.line, top2.screen_line, top2.screen_pos)
|
|
|
|
if top2.line == 1 and top2.screen_line == 1 then break end
|
|
|
|
if top2.screen_line > 1 or Lines[top2.line-1].mode == 'text' then
|
|
|
|
local h = math.floor(15*Zoom)
|
|
|
|
if y - h < 15 then -- top margin = 15
|
|
|
|
break
|
|
|
|
end
|
|
|
|
y = y - h
|
2022-05-21 06:43:09 +01:00
|
|
|
else
|
2022-05-22 07:02:04 +01:00
|
|
|
assert(top2.line > 1)
|
|
|
|
assert(Lines[top2.line-1].mode == 'drawing')
|
|
|
|
-- We currently can't draw partial drawings, so either skip it entirely
|
|
|
|
-- or not at all.
|
2022-05-22 17:15:56 +01:00
|
|
|
local h = 20 + Drawing.pixels(Lines[top2.line-1].h)
|
2022-05-22 07:02:04 +01:00
|
|
|
if y - h < 15 then
|
|
|
|
break
|
|
|
|
end
|
|
|
|
--? print('skipping drawing of height', h)
|
|
|
|
y = y - h
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
2022-05-22 07:02:04 +01:00
|
|
|
top2 = Text.previous_screen_line(top2)
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
2022-05-22 07:02:04 +01:00
|
|
|
--? print('top2 finally:', top2.line, top2.screen_line, top2.screen_pos)
|
|
|
|
Screen_top1 = Text.to1(top2)
|
|
|
|
--? print('top1 finally:', Screen_top1.line, Screen_top1.pos)
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
|
|
|
|
2022-05-18 06:53:09 +01:00
|
|
|
function Text.in_line(line, x,y)
|
2022-05-19 01:22:04 +01:00
|
|
|
if line.y == nil then return false end -- outside current page
|
2022-05-20 06:07:12 +01:00
|
|
|
if x < 16 then return false end
|
|
|
|
if y < line.y then return false end
|
|
|
|
if line.screen_line_starting_pos == nil then return y < line.y + math.floor(15*Zoom) end
|
|
|
|
return y < line.y + #line.screen_line_starting_pos * math.floor(15*Zoom)
|
2022-05-18 06:53:09 +01:00
|
|
|
end
|
|
|
|
|
2022-05-20 06:07:12 +01:00
|
|
|
function Text.move_cursor(line_index, line, mx, my)
|
2022-05-22 00:24:07 +01:00
|
|
|
Cursor1.line = line_index
|
2022-05-20 06:07:12 +01:00
|
|
|
if line.screen_line_starting_pos == nil then
|
2022-05-22 00:24:07 +01:00
|
|
|
Cursor1.pos = Text.nearest_cursor_pos(line.data, mx)
|
2022-05-20 06:07:12 +01:00
|
|
|
return
|
|
|
|
end
|
|
|
|
assert(line.fragments)
|
|
|
|
assert(my >= line.y)
|
|
|
|
-- duplicate some logic from Text.draw
|
|
|
|
local y = line.y
|
2022-05-20 06:26:15 +01:00
|
|
|
for screen_line_index,screen_line_starting_pos in ipairs(line.screen_line_starting_pos) do
|
2022-05-20 06:07:12 +01:00
|
|
|
local nexty = y + math.floor(15*Zoom)
|
|
|
|
if my < nexty then
|
2022-05-20 06:26:15 +01:00
|
|
|
-- On all wrapped screen lines but the final one, clicks past end of
|
|
|
|
-- line position cursor on final character of screen line.
|
|
|
|
-- (The final screen line positions past end of screen line as always.)
|
|
|
|
if mx > Line_width and screen_line_index < #line.screen_line_starting_pos then
|
2022-05-22 00:24:07 +01:00
|
|
|
Cursor1.pos = line.screen_line_starting_pos[screen_line_index+1]
|
2022-05-20 06:26:15 +01:00
|
|
|
return
|
|
|
|
end
|
2022-05-20 06:07:12 +01:00
|
|
|
local s = string.sub(line.data, screen_line_starting_pos)
|
2022-05-22 00:24:07 +01:00
|
|
|
Cursor1.pos = screen_line_starting_pos + Text.nearest_cursor_pos(s, mx) - 1
|
2022-05-20 06:07:12 +01:00
|
|
|
return
|
|
|
|
end
|
|
|
|
y = nexty
|
|
|
|
end
|
|
|
|
assert(false)
|
2022-05-18 06:53:09 +01:00
|
|
|
end
|
2022-05-20 06:07:12 +01:00
|
|
|
-- manual test:
|
|
|
|
-- line: abc
|
|
|
|
-- def
|
|
|
|
-- gh
|
|
|
|
-- fragments: abc, def, gh
|
|
|
|
-- click inside e
|
|
|
|
-- line_starting_pos = 1 + 3 = 4
|
|
|
|
-- nearest_cursor_pos('defgh', mx) = 2
|
2022-05-22 00:24:07 +01:00
|
|
|
-- Cursor1.pos = 4 + 2 - 1 = 5
|
2022-05-20 06:07:12 +01:00
|
|
|
-- manual test:
|
|
|
|
-- click inside h
|
|
|
|
-- line_starting_pos = 1 + 3 + 3 = 7
|
|
|
|
-- nearest_cursor_pos('gh', mx) = 2
|
2022-05-22 00:24:07 +01:00
|
|
|
-- Cursor1.pos = 7 + 2 - 1 = 8
|
2022-05-18 06:53:09 +01:00
|
|
|
|
2022-05-20 16:02:03 +01:00
|
|
|
function Text.nearest_cursor_pos(line, x)
|
2022-05-18 04:29:08 +01:00
|
|
|
if x == 0 then
|
|
|
|
return 1
|
|
|
|
end
|
2022-05-20 01:46:02 +01:00
|
|
|
local len = utf8.len(line)
|
|
|
|
local max_x = Text.cursor_x(line, len+1)
|
2022-05-18 04:29:08 +01:00
|
|
|
if x > max_x then
|
2022-05-20 01:46:02 +01:00
|
|
|
return len+1
|
2022-05-18 04:29:08 +01:00
|
|
|
end
|
2022-05-20 01:46:02 +01:00
|
|
|
local left, right = 1, len+1
|
2022-05-20 05:52:38 +01:00
|
|
|
--? print('--')
|
|
|
|
while true do
|
2022-05-18 04:29:08 +01:00
|
|
|
local curr = math.floor((left+right)/2)
|
|
|
|
local currxmin = Text.cursor_x(line, curr)
|
|
|
|
local currxmax = Text.cursor_x(line, curr+1)
|
2022-05-20 05:52:38 +01:00
|
|
|
--? print(x, left, right, curr, currxmin, currxmax)
|
2022-05-18 04:29:08 +01:00
|
|
|
if currxmin <= x and x < currxmax then
|
|
|
|
return curr
|
|
|
|
end
|
2022-05-20 05:52:38 +01:00
|
|
|
if left >= right-1 then
|
|
|
|
return right
|
|
|
|
end
|
2022-05-18 04:29:08 +01:00
|
|
|
if currxmin > x then
|
|
|
|
right = curr
|
|
|
|
else
|
|
|
|
left = curr
|
|
|
|
end
|
|
|
|
end
|
2022-05-20 05:52:38 +01:00
|
|
|
assert(false)
|
2022-05-18 04:29:08 +01:00
|
|
|
end
|
|
|
|
|
|
|
|
function Text.cursor_x(line_data, cursor_pos)
|
|
|
|
local line_before_cursor = line_data:sub(1, cursor_pos-1)
|
|
|
|
local text_before_cursor = love.graphics.newText(love.graphics.getFont(), line_before_cursor)
|
2022-05-20 00:35:52 +01:00
|
|
|
return 25 + math.floor(text_before_cursor:getWidth()*Zoom)
|
2022-05-18 04:29:08 +01:00
|
|
|
end
|
|
|
|
|
2022-05-20 01:29:14 +01:00
|
|
|
function Text.cursor_x2(s, cursor_pos)
|
|
|
|
local s_before_cursor = s:sub(1, cursor_pos-1)
|
|
|
|
local text_before_cursor = love.graphics.newText(love.graphics.getFont(), s_before_cursor)
|
|
|
|
return math.floor(text_before_cursor:getWidth()*Zoom)
|
|
|
|
end
|
|
|
|
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2022-05-22 00:24:07 +01:00
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function Text.to2(pos1)
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2022-05-22 07:02:04 +01:00
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assert(Lines[pos1.line].mode == 'text')
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2022-05-22 00:24:07 +01:00
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local result = {line=pos1.line, screen_line=1}
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2022-05-22 06:08:13 +01:00
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if Lines[pos1.line].screen_line_starting_pos == nil then
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2022-05-22 00:24:07 +01:00
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result.screen_pos = pos1.pos
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else
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for i=#Lines[pos1.line].screen_line_starting_pos,1,-1 do
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local spos = Lines[pos1.line].screen_line_starting_pos[i]
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2022-05-22 07:02:04 +01:00
|
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if spos <= pos1.pos then
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2022-05-22 00:24:07 +01:00
|
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result.screen_line = i
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2022-05-22 07:02:04 +01:00
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result.screen_pos = pos1.pos - spos + 1
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2022-05-22 00:24:07 +01:00
|
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|
break
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end
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end
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end
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assert(result.screen_pos)
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|
|
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return result
|
|
|
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end
|
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|
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function Text.to1(pos2)
|
|
|
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local result = {line=pos2.line, pos=pos2.screen_pos}
|
|
|
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if pos2.screen_line > 1 then
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2022-05-22 07:02:04 +01:00
|
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result.pos = Lines[pos2.line].screen_line_starting_pos[pos2.screen_line] + pos2.screen_pos - 1
|
2022-05-22 00:24:07 +01:00
|
|
|
end
|
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return result
|
|
|
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end
|
|
|
|
|
2022-05-22 07:02:04 +01:00
|
|
|
function Text.previous_screen_line(pos2)
|
|
|
|
if pos2.screen_line > 1 then
|
|
|
|
return {line=pos2.line, screen_line=pos2.screen_line-1, screen_pos=1}
|
|
|
|
elseif pos2.line == 1 then
|
|
|
|
return pos2
|
|
|
|
elseif Lines[pos2.line-1].mode == 'drawing' then
|
|
|
|
return {line=pos2.line-1, screen_line=1, screen_pos=1}
|
|
|
|
else
|
|
|
|
local l = Lines[pos2.line-1]
|
|
|
|
if l.screen_line_starting_pos == nil then
|
|
|
|
return {line=pos2.line-1, screen_line=1, screen_pos=1}
|
|
|
|
else
|
|
|
|
return {line=pos2.line-1, screen_line=#Lines[pos2.line-1].screen_line_starting_pos, screen_pos=1}
|
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-05-18 04:29:08 +01:00
|
|
|
return Text
|