771

774

Try pressing `ctrl+l` then selecting `on`. It provides a useful orientation of
available hooks when programming live, and also mentions an important gotcha.

* This app encourages a style of development that requires top-level
  definitions to be decoupled from each other. No live functions load until
  all definitions have been run. However top-level globals are initialized as
  they're loaded. This makes a definition like this a very bad idea, assuming
  `Foo` and `Bar` are top-level variables:
    Foo = {
      Bar
    }
  Don't assume that Bar will exist when Foo is defined. We don't currently
  have any checks for this.

on.keychord_press = function(chord, key)
	if Animating then return end
	if Move then return end
	if Manifest_navigator.reload then
		load_manifest()
	end
	if chord == 'C-=' then
		-- zoom in
		Viewport.zoom = Viewport.zoom+0.1
		B()
	elseif chord == 'C--' then
		-- zoom out
		if (Viewport.zoom-0.1)*20 >= 1 then  -- disallow font size of 0
			Viewport.zoom = Viewport.zoom-0.1
			B()
		end
	elseif chord == 'C-0' then
		-- reset zoom
		Viewport.zoom = 1.0
		B()
	elseif chord == 'C-q' then
		live.send_to_app('QUIT')
	elseif Manifest_navigator.show then
		keychord_press_on_manifest_navigator(chord, key)
	elseif chord == 'C-n' then
		new_definition()
		A()
	elseif chord == 'C-l' then
		Manifest_navigator.show = true
		Manifest_navigator.for_delete = false
		initialize_manifest_navigator()
	elseif chord == 'C-d' then
		Manifest_navigator.show = true
		Manifest_navigator.for_delete = true
		initialize_manifest_navigator()
	elseif Cursor_node then
		print('a', Cursor_node.editor.line_cache[1])
		local old_top = {line=Cursor_node.editor.screen_top1.line, pos=Cursor_node.editor.screen_top1.pos}
		local old_definition_name = live.get_cmd_from_buffer(Cursor_node.editor.lines[1].data)
		edit.keychord_press(Cursor_node.editor, chord, key)
		if not eq(Cursor_node.editor.screen_top1, old_top) then
			Viewport.y = Cursor_node.y + y_of_schema1(Cursor_node.editor, Cursor_node.editor.screen_top1)
		end
		local definition_name = live.get_cmd_from_buffer(Cursor_node.editor.lines[1].data)
		maybe_update_key_in_definitions(old_definition_name, definition_name, Cursor_node)
		B(--[[preserve screen_top of cursor node]] true)
	else
		if chord == 'up' then
			Viewport.y = Viewport.y - scale(20)
			B()
		elseif chord == 'down' then
			Viewport.y = Viewport.y + scale(20)
			B()
		elseif chord == 'left' then
			Viewport.x = Viewport.x - scale(50)
			B()
		elseif chord == 'right' then
			Viewport.x = Viewport.x + scale(50)
			B()
		elseif chord == 'pageup' then
			Viewport.y = Viewport.y - App.screen.height/Viewport.zoom
			B()
		elseif chord == 'S-up' then
			Viewport.y = Viewport.y - App.screen.height/Viewport.zoom
			B()
		elseif chord == 'pagedown' then
			Viewport.y = Viewport.y + App.screen.height/Viewport.zoom
			B()
		elseif chord == 'S-down' then
			Viewport.y = Viewport.y + App.screen.height/Viewport.zoom
			B()
		elseif chord == 'S-left' then
			Viewport.x = Viewport.x - App.screen.width/Viewport.zoom
			B()
		elseif chord == 'S-right' then
			Viewport.x = Viewport.x + App.screen.width/Viewport.zoom
			B()
		end
	end
end

{"load_definition":716,"Manifest":769,"load_manifest":694,"get_manifest":768,"on.draw":565,"delete_definition":673,"Menu_background_color":611,"move_candidate_to_front_of_manifest":632,"on.load_settings":700,"Surface":422,"Menu_command_color":613,"text_input_on_manifest_navigator":634,"Menu_highlight_color":614,"vy":546,"table_and_array_both_empty":689,"Viewport":604,"manifest_navigator_candidates":638,"draw_manifest_navigator":677,"num_lines_for_manifest_navigator":676,"reset_manifest_navigator":772,"maybe_update_key_in_definitions":529,"load_from_iterator":670,"on.update":741,"get_definition_from_app":735,"font":353,"fw_app":"driver","sy":469,"manifest_navigator_down":635,"on":1,"initialize_manifest_navigator":773,"on_handle":547,"Manifest_navigator":495,"on_text":539,"on.mouse_press":722,"update_editor_box":711,"sx":544,"vx":545,"box_height":680,"schema1_of_y":667,"compute_layout":385,"on.key_release":720,"on.code_change":734,"y_of_schema1":364,"mouse_cursor":558,"Mouse_cursor":559,"add_hotkey_to_menu":616,"set_mouse_cursor":562,"Page":475,"draw_ticks":663,"on.mouse_release":721,"approximate":579,"tick_spec":660,"Menu_border_color":612,"scale":712,"on.text_input":521,"add_def_to_menu":640,"on.save_settings":742,"order_of_magnitude":573,"initialize_editor":678,"line_height":365,"Animating":770,"new_definition":767,"Cursor_node":172,"on.initialize":695,"draw_cursor":639,"A":713,"fw_parent":773,"manifest_navigator_up":628,"add_thick_line":400,"B":379,"copy_shape":396,"approximate_up":658,"manifest_coord":636,"on.keychord_press":774,"draw_menu_bar":641,"on.code_submit":766,"Ticks_font":669,"keychord_press_on_manifest_navigator":765,"Definitions":503,"manifest_index":637}

{"load_definition":716,"Manifest":769,"load_manifest":694,"get_manifest":768,"on.draw":565,"delete_definition":673,"Menu_background_color":611,"move_candidate_to_front_of_manifest":632,"on.load_settings":700,"Surface":422,"Menu_command_color":613,"text_input_on_manifest_navigator":634,"Menu_highlight_color":614,"vy":546,"table_and_array_both_empty":689,"Viewport":604,"manifest_navigator_candidates":638,"draw_manifest_navigator":677,"num_lines_for_manifest_navigator":676,"reset_manifest_navigator":772,"maybe_update_key_in_definitions":529,"load_from_iterator":670,"on.update":741,"get_definition_from_app":735,"font":353,"fw_app":"driver","sy":469,"manifest_navigator_down":635,"on":1,"initialize_manifest_navigator":773,"on_handle":547,"Manifest_navigator":495,"on_text":539,"on.mouse_press":722,"update_editor_box":711,"sx":544,"vx":545,"box_height":680,"schema1_of_y":667,"compute_layout":385,"on.key_release":720,"on.code_change":734,"y_of_schema1":364,"mouse_cursor":558,"Mouse_cursor":559,"add_hotkey_to_menu":616,"set_mouse_cursor":562,"Page":475,"draw_ticks":663,"on.mouse_release":721,"approximate":579,"tick_spec":660,"Menu_border_color":612,"scale":712,"on.text_input":521,"add_def_to_menu":640,"on.save_settings":742,"order_of_magnitude":573,"initialize_editor":678,"line_height":365,"Animating":770,"new_definition":767,"Cursor_node":172,"on.initialize":695,"draw_cursor":639,"A":713,"fw_parent":772,"manifest_navigator_up":628,"add_thick_line":400,"B":379,"copy_shape":396,"approximate_up":658,"manifest_coord":636,"on.keychord_press":739,"draw_menu_bar":641,"on.code_submit":766,"Ticks_font":669,"keychord_press_on_manifest_navigator":765,"Definitions":503,"manifest_index":637}

initialize_manifest_navigator = function()
	Manifest_navigator.candidates = Manifest
	Manifest_navigator.num_lines = num_lines_for_manifest_navigator(Manifest_navigator.candidates)
end

reset_manifest_navigator = function()
	Manifest_navigator.show = false
	Manifest_navigator.index = 1
	Manifest_navigator.filter = ''
end

{"load_definition":716,"Manifest":769,"load_manifest":694,"get_manifest":768,"on.draw":565,"delete_definition":673,"Menu_background_color":611,"move_candidate_to_front_of_manifest":632,"on.load_settings":700,"Surface":422,"Menu_command_color":613,"text_input_on_manifest_navigator":634,"Menu_highlight_color":614,"vy":546,"table_and_array_both_empty":689,"Viewport":604,"manifest_navigator_candidates":638,"draw_manifest_navigator":677,"num_lines_for_manifest_navigator":676,"reset_manifest_navigator":772,"maybe_update_key_in_definitions":529,"load_from_iterator":670,"on.update":741,"get_definition_from_app":735,"font":353,"fw_app":"driver","sy":469,"manifest_navigator_down":635,"on":1,"on_handle":547,"Manifest_navigator":495,"on_text":539,"on.mouse_press":722,"update_editor_box":711,"sx":544,"vx":545,"box_height":680,"schema1_of_y":667,"compute_layout":385,"on.key_release":720,"on.code_change":734,"y_of_schema1":364,"mouse_cursor":558,"Mouse_cursor":559,"add_hotkey_to_menu":616,"set_mouse_cursor":562,"Page":475,"draw_ticks":663,"on.mouse_release":721,"approximate":579,"tick_spec":660,"Menu_border_color":612,"scale":712,"on.text_input":521,"add_def_to_menu":640,"on.save_settings":742,"order_of_magnitude":573,"initialize_editor":678,"line_height":365,"Animating":770,"new_definition":767,"Cursor_node":172,"on.initialize":695,"draw_cursor":639,"A":713,"fw_parent":771,"manifest_navigator_up":628,"add_thick_line":400,"B":379,"copy_shape":396,"approximate_up":658,"manifest_coord":636,"on.keychord_press":739,"draw_menu_bar":641,"on.code_submit":766,"Ticks_font":669,"keychord_press_on_manifest_navigator":765,"Definitions":503,"manifest_index":637}

	if Manifest_navigator.num_lines == nil then
		Manifest_navigator.num_lines = num_lines_for_manifest_navigator(Manifest_navigator.candidates)
	end

end

end

	candidates = Manifest,  -- list of candidates matching filter

	-- candidates: list of candidates matching the filter

}

}

  --   on.draw

  --   on.draw (avoid modifying global state here)

-- ONE MAJOR GOTCHA
-- You might be used to programming with files. I think this approach is
-- superior, but it has one major drawback: you can't make any assumptions
-- about the order definitions are loaded in. In particular, don't mention one
-- global in the initialization of another.
--
-- Foo = { Bar }
--
-- Things might work fine for a long time before breaking.
--
-- As a corollary, never use the environment to modify this buffer. `on`
-- should always live in version id 1.
--
-- There are no such restrictions on function definitions.