mirror of
https://github.com/koreader/koreader
synced 2024-11-13 19:11:25 +00:00
312 lines
9.4 KiB
Lua
312 lines
9.4 KiB
Lua
local Device = require("ui/device")
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local Screen = require("ui/screen")
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local Input = require("ui/input")
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local Event = require("ui/event")
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local DEBUG = require("dbg")
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local _ = require("gettext")
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-- initialize output module, this must be initialized before Input
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Screen:init()
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-- initialize the input handling
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Input:init()
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local WAVEFORM_MODE_INIT = 0x0 -- Screen goes to white (clears)
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local WAVEFORM_MODE_DU = 0x1 -- Grey->white/grey->black
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local WAVEFORM_MODE_GC16 = 0x2 -- High fidelity (flashing)
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local WAVEFORM_MODE_GC4 = WAVEFORM_MODE_GC16 -- For compatibility
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local WAVEFORM_MODE_GC16_FAST = 0x3 -- Medium fidelity
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local WAVEFORM_MODE_A2 = 0x4 -- Faster but even lower fidelity
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local WAVEFORM_MODE_GL16 = 0x5 -- High fidelity from white transition
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local WAVEFORM_MODE_GL16_FAST = 0x6 -- Medium fidelity from white transition
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local WAVEFORM_MODE_AUTO = 0x101
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-- there is only one instance of this
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local UIManager = {
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default_refresh_type = 0, -- 0 for partial refresh, 1 for full refresh
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default_waveform_mode = WAVEFORM_MODE_GC16, -- high fidelity waveform
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fast_waveform_mode = WAVEFORM_MODE_A2,
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-- force to repaint all the widget is stack, will be reset to false
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-- after each ui loop
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repaint_all = false,
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-- force to do full refresh, will be reset to false
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-- after each ui loop
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full_refresh = false,
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-- force to do patial refresh, will be reset to false
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-- after each ui loop
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patial_refresh = false,
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-- trigger a full refresh when counter reaches FULL_REFRESH_COUNT
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FULL_REFRESH_COUNT = DRCOUNTMAX,
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refresh_count = 0,
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_running = true,
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_window_stack = {},
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_execution_stack = {},
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_dirty = {}
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}
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-- register & show a widget
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function UIManager:show(widget, x, y)
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-- put widget on top of stack
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table.insert(self._window_stack, {x = x or 0, y = y or 0, widget = widget})
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-- and schedule it to be painted
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self:setDirty(widget)
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-- tell the widget that it is shown now
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widget:handleEvent(Event:new("Show"))
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-- check if this widget disables double tap gesture
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if widget.disable_double_tap then
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Input.disable_double_tap = true
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end
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end
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-- unregister a widget
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function UIManager:close(widget)
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Input.disable_double_tap = DGESDETECT_DISABLE_DOUBLE_TAP
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local dirty = false
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for i = #self._window_stack, 1, -1 do
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if self._window_stack[i].widget == widget then
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table.remove(self._window_stack, i)
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dirty = true
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elseif self._window_stack[i].widget.disable_double_tap then
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Input.disable_double_tap = true
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end
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end
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if dirty then
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-- schedule remaining widgets to be painted
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for i = 1, #self._window_stack do
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self:setDirty(self._window_stack[i].widget)
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end
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end
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end
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-- schedule an execution task
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function UIManager:schedule(time, action)
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table.insert(self._execution_stack, { time = time, action = action })
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end
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-- schedule task in a certain amount of seconds (fractions allowed) from now
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function UIManager:scheduleIn(seconds, action)
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local when = { util.gettime() }
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local s = math.floor(seconds)
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local usecs = (seconds - s) * 1000000
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when[1] = when[1] + s
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when[2] = when[2] + usecs
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if when[2] > 1000000 then
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when[1] = when[1] + 1
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when[2] = when[2] - 1000000
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end
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self:schedule(when, action)
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end
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-- register a widget to be repainted
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function UIManager:setDirty(widget, refresh_type)
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-- "auto": request full refresh
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-- "full": force full refresh
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-- "partial": partial refresh
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if not refresh_type then
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refresh_type = "auto"
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end
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self._dirty[widget] = refresh_type
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end
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-- signal to quit
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function UIManager:quit()
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self._running = false
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end
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-- transmit an event to registered widgets
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function UIManager:sendEvent(event)
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-- top level widget has first access to the event
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if self._window_stack[#self._window_stack].widget:handleEvent(event) then
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return
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end
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-- if the event is not consumed, active widgets can access it
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for _, widget in ipairs(self._window_stack) do
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if widget.widget.is_always_active then
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if widget.widget:handleEvent(event) then return end
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end
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if widget.widget.active_widgets then
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for _, active_widget in ipairs(widget.widget.active_widgets) do
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if active_widget:handleEvent(event) then return end
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end
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end
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end
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end
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function UIManager:checkTasks()
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local now = { util.gettime() }
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-- check if we have timed events in our queue and search next one
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local wait_until = nil
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local all_tasks_checked
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repeat
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all_tasks_checked = true
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for i = #self._execution_stack, 1, -1 do
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local task = self._execution_stack[i]
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if not task.time
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or task.time[1] < now[1]
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or task.time[1] == now[1] and task.time[2] < now[2] then
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-- task is pending to be executed right now. do it.
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task.action()
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-- and remove from table
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table.remove(self._execution_stack, i)
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-- start loop again, since new tasks might be on the
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-- queue now
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all_tasks_checked = false
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elseif not wait_until
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or wait_until[1] > task.time[1]
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or wait_until[1] == task.time[1] and wait_until[2] > task.time[2] then
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-- task is to be run in the future _and_ is scheduled
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-- earlier than the tasks we looked at already
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-- so adjust to the currently examined task instead.
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wait_until = task.time
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end
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end
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until all_tasks_checked
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return wait_until
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end
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-- this is the main loop of the UI controller
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-- it is intended to manage input events and delegate
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-- them to dialogs
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function UIManager:run()
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self._running = true
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while self._running do
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local now = { util.gettime() }
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local wait_until = self:checkTasks()
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--DEBUG("---------------------------------------------------")
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--DEBUG("exec stack", self._execution_stack)
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--DEBUG("window stack", self._window_stack)
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--DEBUG("dirty stack", self._dirty)
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--DEBUG("---------------------------------------------------")
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-- stop when we have no window to show
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if #self._window_stack == 0 then
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DEBUG("no dialog left to show, would loop endlessly")
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return nil
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end
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-- repaint dirty widgets
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local dirty = false
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local request_full_refresh = false
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local force_full_refresh = false
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local force_patial_refresh = false
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local force_fast_refresh = false
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for _, widget in ipairs(self._window_stack) do
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if self.repaint_all or self._dirty[widget.widget] then
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widget.widget:paintTo(Screen.bb, widget.x, widget.y)
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if self._dirty[widget.widget] == "auto" then
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request_full_refresh = true
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end
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if self._dirty[widget.widget] == "full" then
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force_full_refresh = true
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end
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if self._dirty[widget.widget] == "partial" then
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force_patial_refresh = true
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end
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if self._dirty[widget.widget] == "fast" then
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force_fast_refresh = true
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end
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-- and remove from list after painting
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self._dirty[widget.widget] = nil
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-- trigger repaint
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dirty = true
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end
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end
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if self.full_refresh then
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dirty = true
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force_full_refresh = true
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end
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if self.patial_refresh then
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dirty = true
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force_patial_refresh = true
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end
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self.repaint_all = false
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self.full_refresh = false
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self.patial_refresh = false
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local refresh_type = self.default_refresh_type
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local waveform_mode = self.default_waveform_mode
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if dirty then
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if force_patial_refresh or force_fast_refresh then
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refresh_type = 0
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elseif force_full_refresh or self.refresh_count == self.FULL_REFRESH_COUNT - 1 then
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refresh_type = 1
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end
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if force_fast_refresh then
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waveform_mode = self.fast_waveform_mode
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end
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if self.update_region_func then
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local update_region = self.update_region_func()
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-- in some rare cases update region has 1 pixel offset
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Screen:refresh(refresh_type, waveform_mode,
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update_region.x-1, update_region.y-1,
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update_region.w+2, update_region.h+2)
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else
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Screen:refresh(refresh_type, waveform_mode)
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end
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if self.refresh_type == 1 then
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self.refresh_count = 0
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elseif not force_patial_refresh and not force_full_refresh then
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self.refresh_count = (self.refresh_count + 1)%self.FULL_REFRESH_COUNT
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end
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self.update_region_func = nil
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end
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self:checkTasks()
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-- wait for next event
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-- note that we will skip that if in the meantime we have tasks that are ready to run
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local input_event = nil
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if not wait_until then
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-- no pending task, wait endlessly
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input_event = Input:waitEvent()
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elseif wait_until[1] > now[1]
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or wait_until[1] == now[1] and wait_until[2] > now[2] then
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local wait_for = { s = wait_until[1] - now[1], us = wait_until[2] - now[2] }
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if wait_for.us < 0 then
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wait_for.s = wait_for.s - 1
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wait_for.us = 1000000 + wait_for.us
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end
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-- wait until next task is pending
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input_event = Input:waitEvent(wait_for.us, wait_for.s)
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end
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-- delegate input_event to handler
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if input_event then
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--DEBUG("in ui.lua:", input_event)
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if input_event == "IntoSS" then
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Device:intoScreenSaver()
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elseif input_event == "OutOfSS" then
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Device:outofScreenSaver()
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elseif input_event == "Charging" then
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Device:usbPlugIn()
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elseif input_event == "NotCharging" then
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Device:usbPlugOut()
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elseif input_event == "Light" then
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Device:getPowerDevice():toggleFrontlight()
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elseif (input_event == "Power" and not Device.screen_saver_mode) or
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input_event == "Suspend" then
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local InfoMessage = require("ui/widget/infomessage")
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self:show(InfoMessage:new{
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text = _("Standby"),
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timeout = 1,
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})
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Device:prepareSuspend()
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self:scheduleIn(0.5, function() Device:Suspend() end)
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elseif (input_event == "Power" and Device.screen_saver_mode) or
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input_event == "Resume" then
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Device:Resume()
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else
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self:sendEvent(input_event)
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end
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end
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end
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end
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return UIManager
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