mirror of https://github.com/koreader/koreader
Qrcode support (#6844)
2 new widgets: - QRWidget, that's like an ImageWidget, but with a text property that will be converted to a QR code ; - QRMessage, that's like an InfoMessage, but shows the message as QR code. Moreover, it adds the ability to export QR codes to the text editor. 1 new plugin: - Generate QR codes from clipboard Changes to text editor plugin: - Add the ability to export QR codes.reviewable/pr6848/r1
jperon
4 years ago
committed by
GitHub
parent
8403154d4d
commit
43ba8a1173
@ -1 +1 @@
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Subproject commit 444a70965acb8348e8e15bed1af41560e9786831
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Subproject commit a4dab90a4c6bd2b7fdb51736dc0d3a5fcfe94c13
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@ -0,0 +1,114 @@
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--[[--
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Widget that displays a qr code.
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It vanishes on key press or after a given timeout.
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Example:
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local UIManager = require("ui/uimanager")
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local _ = require("gettext")
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local Screen = require("device").screen
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local sample
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sample = QRMessage:new{
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text = _("my message"),
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height = Screen:scaleBySize(400),
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width = Screen:scaleBySize(400),
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timeout = 5, -- This widget will vanish in 5 seconds.
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}
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UIManager:show(sample)
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]]
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local Blitbuffer = require("ffi/blitbuffer")
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local CenterContainer = require("ui/widget/container/centercontainer")
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local Device = require("device")
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local FrameContainer = require("ui/widget/container/framecontainer")
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local Geom = require("ui/geometry")
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local GestureRange = require("ui/gesturerange")
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local QRWidget = require("ui/widget/qrwidget")
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local InputContainer = require("ui/widget/container/inputcontainer")
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local UIManager = require("ui/uimanager")
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local Input = Device.input
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local Screen = Device.screen
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local Size = require("ui/size")
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local QRMessage = InputContainer:new{
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modal = true,
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timeout = nil, -- in seconds
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text = nil, -- The text to encode.
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width = nil, -- The width. Keep it nil to use original width.
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height = nil, -- The height. Keep it nil to use original height.
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dismiss_callback = function() end,
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alpha = nil,
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scale_factor = 1,
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}
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function QRMessage:init()
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if Device:hasKeys() then
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self.key_events = {
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AnyKeyPressed = { { Input.group.Any },
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seqtext = "any key", doc = "close dialog" }
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}
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end
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if Device:isTouchDevice() then
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self.ges_events.TapClose = {
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GestureRange:new{
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ges = "tap",
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range = Geom:new{
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x = 0, y = 0,
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w = Screen:getWidth(),
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h = Screen:getHeight(),
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}
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}
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}
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end
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local padding = Size.padding.fullscreen
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local image_widget = QRWidget:new{
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text = self.text,
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width = self.width and (self.width - 2 * padding),
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height = self.height and (self.height - 2 * padding),
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alpha = self.alpha,
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scale_factor = self.scale_factor,
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}
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local frame = FrameContainer:new{
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background = Blitbuffer.COLOR_WHITE,
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padding = padding,
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image_widget,
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}
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self[1] = CenterContainer:new{
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dimen = Screen:getSize(),
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frame,
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}
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end
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function QRMessage:onCloseWidget()
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UIManager:setDirty(nil, function()
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return "ui", self[1][1].dimen
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end)
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return true
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end
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function QRMessage:onShow()
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-- triggered by the UIManager after we got successfully shown (not yet painted)
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UIManager:setDirty(self, function()
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return "ui", self[1][1].dimen
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end)
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if self.timeout then
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UIManager:scheduleIn(self.timeout, function() UIManager:close(self) end)
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end
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return true
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end
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function QRMessage:onAnyKeyPressed()
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-- triggered by our defined key events
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self.dismiss_callback()
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UIManager:close(self)
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end
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function QRMessage:onTapClose()
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self.dismiss_callback()
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UIManager:close(self)
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end
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return QRMessage
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@ -0,0 +1,54 @@
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--[[
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QRWidget shows a QR code for a given text.
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]]
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local Blitbuffer = require("ffi/blitbuffer")
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local ImageWidget = require("ui/widget/imagewidget")
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local logger = require("logger")
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local qrencode = require("ffi/qrencode")
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local _ = require("gettext")
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local QRWidget = ImageWidget:extend{
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scale_factor = nil,
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text = ""
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-- see ImageWidget for other options.
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}
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function QRWidget:init()
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local text = self.text
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if #text > 2953 then
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local truncated = _("... (truncated...)")
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text = text:sub(1, 2953 - #truncated) .. truncated
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end
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local ok, grid = qrencode.qrcode(text)
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if not ok then
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logger.info("QRWidget: failed to generate QR code.")
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return
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else
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local sq_size
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if self.width then
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if self.height then
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sq_size = math.min(self.width, self.height)/#grid
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else
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sq_size = self.width/#grid
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end
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elseif self.height then
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sq_size = self.height/#grid
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else sq_size = 1
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end
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sq_size = math.floor(sq_size)
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local grid_size = sq_size * #grid
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local bb = Blitbuffer.new(grid_size, grid_size)
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local white = Blitbuffer.COLOR_WHITE
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for x, col in ipairs(grid) do
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for y, lgn in ipairs(col) do
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if lgn < 0 then
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bb:paintRect((x - 1) * sq_size, (y - 1) * sq_size, sq_size, sq_size, white)
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end
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end
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end
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self.image = bb
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end
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end
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return QRWidget
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@ -0,0 +1,6 @@
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local _ = require("gettext")
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return {
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name = "qrclipboard",
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fullname = _("QR from clipboard"),
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description = _([[This plugin generates a QR code from clipboard content.]]),
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}
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@ -0,0 +1,33 @@
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--[[--
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This plugin generates a QR code from clipboard content.
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--]]--
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local Device = require("device")
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local QRMessage = require("ui/widget/qrmessage")
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local UIManager = require("ui/uimanager")
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local WidgetContainer = require("ui/widget/container/widgetcontainer")
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local _ = require("gettext")
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local QRClipboard = WidgetContainer:new{
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name = "qrclipboard",
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is_doc_only = false,
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}
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function QRClipboard:init()
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self.ui.menu:registerToMainMenu(self)
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end
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function QRClipboard:addToMainMenu(menu_items)
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menu_items.qrclipboard = {
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text = _("QR from clipboard"),
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callback = function()
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UIManager:show(QRMessage:new{
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text = Device.input.getClipboardText(),
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width = Device.screen:getWidth(),
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height = Device.screen:getHeight()
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})
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end,
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}
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end
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return QRClipboard
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