reduce ambitions a bit: page up/down need not start screen from the middle of a line
But we still have work to do for cursor up/down.
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27
main.lua
27
main.lua
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@ -38,7 +38,7 @@ require 'icons'
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-- once, and read them passively thereafter.
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Lines = {{mode='text', data=''}}
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Cursor_line = 1
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Cursor_pos = 15 -- in Unicode codepoints, from 1 to utf8.len(line) + 1
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Cursor_pos = 1 -- in Unicode codepoints, from 1 to utf8.len(line) + 1
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Screen_width, Screen_height, Screen_flags = 0, 0, nil
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@ -47,8 +47,7 @@ Cursor_x, Cursor_y = 0, 0 -- in pixels
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-- scrolling support
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Screen_top_line = 1
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Screen_bottom_line = 1
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Top_screen_line_starting_pos = 6 -- when top of screen starts in between a wrapped line
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Bottom_screen_line_starting_pos = 1 -- when bottom of screen starts in between a wrapped line
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Top_screen_line_starting_pos = 1 -- when top of screen starts in between a wrapped line
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Current_drawing_mode = 'line'
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Previous_drawing_mode = nil
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@ -61,17 +60,18 @@ Filename = love.filesystem.getUserDirectory()..'/lines.txt'
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function love.load(arg)
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-- maximize window
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--? love.window.setMode(0, 0) -- maximize
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--? Screen_width, Screen_height, Screen_flags = love.window.getMode()
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--? -- shrink slightly to account for window decoration
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--? Screen_width = Screen_width-100
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--? Screen_height = Screen_height-100
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Screen_width = 120
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Screen_height = 200
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love.window.setMode(0, 0) -- maximize
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Screen_width, Screen_height, Screen_flags = love.window.getMode()
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-- shrink slightly to account for window decoration
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Screen_width = Screen_width-100
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Screen_height = Screen_height-100
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-- for testing line wrap
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--? Screen_width = 120
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--? Screen_height = 200
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love.window.setMode(Screen_width, Screen_height)
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love.window.setTitle('Text with Lines')
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Line_width = 100
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--? Line_width = math.floor(Screen_width/2/40)*40
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--? Line_width = 100
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Line_width = math.floor(Screen_width/2/40)*40
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love.keyboard.setTextInput(true) -- bring up keyboard on touch screen
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love.keyboard.setKeyRepeat(true)
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if #arg > 0 then
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@ -178,7 +178,8 @@ function keychord_pressed(chord)
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elseif chord == 'pagedown' then
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Screen_top_line = Screen_bottom_line
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Cursor_line = Screen_top_line
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Cursor_pos = 1
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Top_screen_line_starting_pos = 1
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Cursor_pos = Top_screen_line_starting_pos
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Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary()
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elseif chord == 'pageup' then
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-- duplicate some logic from love.draw
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10
text.lua
10
text.lua
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@ -26,13 +26,6 @@ function Text.draw(line, line_width, line_index)
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y = y + math.floor(15*Zoom)
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if New_render then print('y', y) end
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end
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if y > Screen_height then
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if line.screen_line_starting_pos then
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Bottom_screen_line_starting_pos = line.screen_line_starting_pos[#line.screen_line_starting_pos]
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else
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Bottom_screen_line_starting_pos = 1
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end
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end
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x = 25
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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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@ -294,8 +287,11 @@ function Text.keychord_pressed(chord)
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end
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end
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if Cursor_line > Screen_bottom_line then
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print('screen top before:', Screen_top_line, Top_screen_line_starting_pos)
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Screen_top_line = Cursor_line
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print('scroll up preserving cursor')
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Text.scroll_up_while_cursor_on_screen()
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print('screen top after:', Screen_top_line, Top_screen_line_starting_pos)
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end
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else
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-- move down one screen line in current line
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