move reader code into frontend/apps/reader

it makes more sense to completely separate the UI framework and
application code

also move frontend/ui/configurable.lua to frontend/configurable.lua

frontend/apps/reader/modules/readercropping.lua

@@ -0,0 +1,163 @@
+local InputContainer = require("ui/widget/container/inputcontainer")
+local UIManager = require("ui/uimanager")
+local Geom = require("ui/geometry")
+local Event = require("ui/event")
+local Screen = require("ui/screen")
+local LeftContainer = require("ui/widget/container/leftcontainer")
+local RightContainer = require("ui/widget/container/rightcontainer")
+local FrameContainer = require("ui/widget/container/framecontainer")
+local VerticalGroup = require("ui/widget/verticalgroup")
+local HorizontalGroup = require("ui/widget/horizontalgroup")
+local BBoxWidget = require("ui/widget/bboxwidget")
+local HorizontalSpan = require("ui/widget/horizontalspan")
+local Button = require("ui/widget/button")
+local Math = require("optmath")
+local DEBUG = require("dbg")
+
+local PageCropDialog = VerticalGroup:new{
+    ok_text = "OK",
+    cancel_text = "Cancel",
+    ok_callback = function() end,
+    cancel_callback = function() end,
+    button_width = math.floor(Screen:scaleByDPI(70)),
+}
+
+function PageCropDialog:init()
+    local horizontal_group = HorizontalGroup:new{}
+    local ok_button = Button:new{
+        text = self.ok_text,
+        callback = self.ok_callback,
+        width = self.button_width,
+        bordersize = 2,
+        radius = 7,
+        text_font_face = "cfont",
+        text_font_size = 20,
+    }
+    local cancel_button = Button:new{
+        text = self.cancel_text,
+        callback = self.cancel_callback,
+        width = self.button_width,
+        bordersize = 2,
+        radius = 7,
+        text_font_face = "cfont",
+        text_font_size = 20,
+    }
+    local ok_container = RightContainer:new{
+        dimen = Geom:new{ w = Screen:getWidth()*0.33, h = Screen:getHeight()/12},
+        ok_button,
+    }
+    local cancel_container = LeftContainer:new{
+        dimen = Geom:new{ w = Screen:getWidth()*0.33, h = Screen:getHeight()/12},
+        cancel_button,
+    }
+    table.insert(horizontal_group, ok_container)
+    table.insert(horizontal_group, HorizontalSpan:new{ width = Screen:getWidth()*0.34})
+    table.insert(horizontal_group, cancel_container)
+    self[2] = FrameContainer:new{
+        horizontal_group,
+        background = 0,
+        bordersize = 0,
+        padding = 0,
+    }
+end
+
+local ReaderCropping = InputContainer:new{}
+
+function ReaderCropping:onPageCrop(mode)
+    if mode == "auto" then return end
+    self.ui:handleEvent(Event:new("CloseConfig"))
+    -- backup original view dimen
+    self.orig_view_dimen = Geom:new{w = self.view.dimen.w, h = self.view.dimen.h}
+    -- backup original view bgcolor
+    self.orig_view_bgcolor = self.view.outer_page_color
+    self.view.outer_page_color = 7 -- gray bgcolor
+    -- backup original zoom mode as cropping use "page" zoom mode
+    self.orig_zoom_mode = self.view.zoom_mode
+    -- backup original page scroll
+    self.orig_page_scroll = self.view.page_scroll
+    self.view.page_scroll = false
+    -- backup and disable original hinting state
+    self.ui:handleEvent(Event:new("DisableHinting"))
+    -- backup original reflow mode as cropping use non-reflow mode
+    self.orig_reflow_mode = self.document.configurable.text_wrap
+    if self.orig_reflow_mode == 1 then
+        self.document.configurable.text_wrap = 0
+        -- if we are in reflow mode, then we are already in page
+        -- mode, just force readerview to recalculate visible_area
+        self.view:recalculate()
+    else
+        self.ui:handleEvent(Event:new("SetZoomMode", "page", "cropping"))
+    end
+    self.ui:handleEvent(Event:new("SetDimensions",
+        Geom:new{w = Screen:getWidth(), h = Screen:getHeight()*11/12})
+    )
+    self.bbox_widget = BBoxWidget:new{
+        crop = self,
+        ui = self.ui,
+        view = self.view,
+        document = self.document,
+    }
+    self.crop_dialog = PageCropDialog:new{
+        self.bbox_widget,
+        ok_callback = function() self:onConfirmPageCrop() end,
+        cancel_callback = function() self:onCancelPageCrop() end,
+    }
+    UIManager:show(self.crop_dialog)
+    return true
+end
+
+function ReaderCropping:onConfirmPageCrop()
+    --DEBUG("new bbox", new_bbox)
+    UIManager:close(self.crop_dialog)
+    local new_bbox = self.bbox_widget:getModifiedPageBBox()
+    self.ui:handleEvent(Event:new("BBoxUpdate", new_bbox))
+    local pageno = self.view.state.page
+    self.document.bbox[pageno] = new_bbox
+    self.document.bbox[Math.oddEven(pageno)] = new_bbox
+    self:exitPageCrop(true)
+    return true
+end
+
+function ReaderCropping:onCancelPageCrop()
+    UIManager:close(self.crop_dialog)
+    self:exitPageCrop(false)
+    return true
+end
+
+function ReaderCropping:exitPageCrop(confirmed)
+    -- restore hinting state
+    self.ui:handleEvent(Event:new("RestoreHinting"))
+    -- restore page scroll
+    self.view.page_scroll = self.orig_page_scroll
+    -- restore view bgcolor
+    self.view.outer_page_color = self.orig_view_bgcolor
+    -- restore reflow mode
+    self.document.configurable.text_wrap = self.orig_reflow_mode
+    -- restore view dimens
+    self.ui:handleEvent(Event:new("RestoreDimensions", self.orig_view_dimen))
+    self.view:recalculate()
+    -- Exiting should have the same look and feel with entering.
+    if self.orig_reflow_mode == 1 then
+        self.ui:handleEvent(Event:new("RestoreZoomMode"))
+    else
+        if confirmed then
+            -- if original zoom mode is not "content", set zoom mode to "contentwidth"
+            self.ui:handleEvent(Event:new("SetZoomMode",
+                self.orig_zoom_mode:find("content") and self.orig_zoom_mode or "contentwidth"))
+            self.ui:handleEvent(Event:new("InitScrollPageStates"))
+        else
+            self.ui:handleEvent(Event:new("SetZoomMode", self.orig_zoom_mode))
+        end
+    end
+    UIManager.repaint_all = true
+end
+
+function ReaderCropping:onReadSettings(config)
+    self.document.bbox = config:readSetting("bbox")
+end
+
+function ReaderCropping:onSaveSettings()
+    self.ui.doc_settings:saveSetting("bbox", self.document.bbox)
+end
+
+return ReaderCropping