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123 lines
2.9 KiB
Lua
123 lines
2.9 KiB
Lua
local InputContainer = require("ui/widget/container/inputcontainer")
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local GestureRange = require("ui/gesturerange")
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local Geom = require("ui/geometry")
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local Screen = require("ui/screen")
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local Device = require("ui/device")
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local Event = require("ui/event")
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local DEBUG = require("dbg")
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local ReaderLink = InputContainer:new{
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link_states = {}
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}
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function ReaderLink:init()
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if Device:isTouchDevice() then
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self:initGesListener()
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end
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end
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function ReaderLink:initGesListener()
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if Device:isTouchDevice() then
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self.ges_events = {
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Tap = {
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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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Swipe = {
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GestureRange:new{
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ges = "swipe",
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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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}
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end
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end
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function ReaderLink:onSetDimensions(dimen)
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-- update listening according to new screen dimen
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if Device:isTouchDevice() then
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self:initGesListener()
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end
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end
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function ReaderLink:onTap(arg, ges)
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local function inside_box(pos, box)
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if pos then
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local x, y = pos.x, pos.y
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if box.x <= x and box.y <= y
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and box.x + box.w >= x
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and box.y + box.h >= y then
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return true
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end
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end
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end
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if self.ui.document.info.has_pages then
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local pos = self.view:screenToPageTransform(ges.pos)
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local page_links = self.ui.document:getPageLinks(pos.page)
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--DEBUG("page links", page_links)
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if page_links then
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for i = 1, #page_links do
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local link = page_links[i]
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-- enlarge tappable link box
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local lbox = Geom:new{
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x = link.x0 - Screen:scaleByDPI(15),
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y = link.y0 - Screen:scaleByDPI(15),
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w = link.x1 - link.x0 + Screen:scaleByDPI(30),
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h = link.y1 - link.y0 + Screen:scaleByDPI(30)
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}
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if inside_box(pos, lbox) and link.page then
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return self:onGotoLink(link)
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end
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end
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end
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else
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local link = self.ui.document:getLinkFromPosition(ges.pos)
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if link ~= "" then
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return self:onGotoLink(link)
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end
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end
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end
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function ReaderLink:onGotoLink(link)
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if self.ui.document.info.has_pages then
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table.insert(self.link_states, self.view.state.page)
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self.ui:handleEvent(Event:new("PageUpdate", link.page + 1))
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else
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table.insert(self.link_states, self.ui.document:getXPointer())
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self.document:gotoLink(link)
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self.ui:handleEvent(Event:new("UpdateXPointer"))
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end
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return true
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end
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function ReaderLink:onSwipe(arg, ges)
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if ges.direction == "east" then
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if self.ui.document.info.has_pages then
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local last_page = table.remove(self.link_states)
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if last_page then
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self.ui:handleEvent(Event:new("PageUpdate", last_page))
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return true
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end
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else
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local last_xp = table.remove(self.link_states)
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if last_xp then
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self.ui.document:gotoXPointer(last_xp)
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self.ui:handleEvent(Event:new("UpdateXPointer"))
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return true
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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 ReaderLink
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