mirror of
https://github.com/koreader/koreader
synced 2024-11-16 06:12:56 +00:00
850be52177
TouchMenu: added options to menu items with the following defaults:
keep_menu_open = false
hold_keep_menu_open = true
So, default for Tap callback is to close menu, and for Hold callback
to keep menu open.
In both cases, provide the TouchMenu instance as the 1st argument to
the callback functions (instead of a refresh_menu_func I added in #3941)
so the callback can do more things, like closing, refreshing,
changing menu items text and re-ordering...
ReaderZooming: show symbol for default (like it was done for
ReaderFont, ReaderHyphenation...)
TextEditor plugin: update the previously opened files list in real
time, so the menu can be kept open and used as the TextEditor main
interface.
SSH plugin: keep menu open and update the Start/Stop state in real time
ReadTimer plugin: tried to do what feels right (but I don't use it)
Also remove forgotten cp in the move/paste file code
651 lines
27 KiB
Lua
651 lines
27 KiB
Lua
--[[--
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ReaderLink is an abstraction for document-specific link interfaces.
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]]
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local ConfirmBox = require("ui/widget/confirmbox")
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local Device = require("device")
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local Event = require("ui/event")
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local Geom = require("ui/geometry")
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local GestureRange = require("ui/gesturerange")
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local InfoMessage = require("ui/widget/infomessage")
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local InputContainer = require("ui/widget/container/inputcontainer")
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local LinkBox = require("ui/widget/linkbox")
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local Notification = require("ui/widget/notification")
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local UIManager = require("ui/uimanager")
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local ffiutil = require("ffi/util")
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local logger = require("logger")
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local util = require("util")
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local _ = require("gettext")
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local Screen = Device.screen
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local T = ffiutil.template
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local ReaderLink = InputContainer:new{
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location_stack = {}
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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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self.ui:registerPostInitCallback(function()
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self.ui.menu:registerToMainMenu(self)
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end)
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-- For relative local file links
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local directory, filename = util.splitFilePathName(self.ui.document.file) -- luacheck: no unused
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self.document_dir = directory
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end
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function ReaderLink:onReadSettings(config)
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-- called when loading new document
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self.location_stack = {}
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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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local function isTapToFollowLinksOn()
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return not G_reader_settings:isFalse("tap_to_follow_links")
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end
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local function isSwipeToGoBackEnabled()
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return G_reader_settings:readSetting("swipe_to_go_back") == true
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end
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local function isSwipeToFollowFirstLinkEnabled()
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return G_reader_settings:readSetting("swipe_to_follow_first_link") == true
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end
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local function isSwipeToFollowNearestLinkEnabled()
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return G_reader_settings:readSetting("swipe_to_follow_nearest_link") == true
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end
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local function isSwipeToJumpToLatestBookmarkEnabled()
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return G_reader_settings:readSetting("swipe_to_jump_to_latest_bookmark") == true
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end
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function ReaderLink:addToMainMenu(menu_items)
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-- insert table to main reader menu
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menu_items.follow_links = {
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text = _("Links"),
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sub_item_table = {
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{
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text = _("Tap to follow links"),
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checked_func = isTapToFollowLinksOn,
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callback = function()
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G_reader_settings:saveSetting("tap_to_follow_links",
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not isTapToFollowLinksOn())
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end,
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separator = true,
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help_text = _([[Tap on links to follow them.]]),
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},
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{
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text = _("Swipe to go back"),
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checked_func = isSwipeToGoBackEnabled,
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callback = function()
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G_reader_settings:saveSetting("swipe_to_go_back",
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not isSwipeToGoBackEnabled())
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end,
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help_text = _([[Swipe to the right to go back to the previous location after you have followed a link. When the location stack is empty, swiping to the right takes you to the previous page.]]),
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},
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{
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text = _("Swipe to follow first link on page"),
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checked_func = isSwipeToFollowFirstLinkEnabled,
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callback = function()
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G_reader_settings:saveSetting("swipe_to_follow_first_link",
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not isSwipeToFollowFirstLinkEnabled())
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if isSwipeToFollowFirstLinkEnabled() then
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G_reader_settings:delSetting("swipe_to_follow_nearest_link") -- can't have both
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end
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end,
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help_text = _([[Swipe to the left to follow the first link in the current page.]]),
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},
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{
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text = _("Swipe to follow nearest link"),
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checked_func = isSwipeToFollowNearestLinkEnabled,
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callback = function()
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G_reader_settings:saveSetting("swipe_to_follow_nearest_link",
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not isSwipeToFollowNearestLinkEnabled())
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if isSwipeToFollowNearestLinkEnabled() then
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G_reader_settings:delSetting("swipe_to_follow_first_link") -- can't have both
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end
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end,
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help_text = _([[Swipe to the left to follow the link nearest to where you started the swipe. This is useful when a small font is used and tapping on small links is tedious.]]),
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separator = true,
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},
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{
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text = _("Swipe to jump to latest bookmark"),
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checked_func = isSwipeToJumpToLatestBookmarkEnabled,
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callback = function()
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G_reader_settings:saveSetting("swipe_to_jump_to_latest_bookmark",
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not isSwipeToJumpToLatestBookmarkEnabled())
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end,
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help_text = _([[Swipe to the left to go the most recently bookmarked page.
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This can be useful to quickly swipe back and forth between what you are reading and some reference page (for example notes, a map or a characters list).
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If any of the other Swipe to follow link options is enabled, this will work only when the current page contains no link.]]),
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},
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}
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}
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menu_items.go_to_previous_location = {
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text = _("Go back to previous location"),
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enabled_func = function() return #self.location_stack > 0 end,
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callback = function() self:onGoBackLink() end,
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hold_callback = function(touchmenu_instance)
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UIManager:show(ConfirmBox:new{
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text = _("Clear location history?"),
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ok_text = _("Clear"),
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ok_callback = function()
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self.location_stack = {}
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touchmenu_instance:closeMenu()
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end,
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})
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end,
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}
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end
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--- Check if a xpointer to <a> node really points to itself
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function ReaderLink:isXpointerCoherent(a_xpointer)
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-- Get screen coordinates of xpointer
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local doc_margins = self.ui.document._document:getPageMargins()
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local doc_y, doc_x = self.ui.document:getPosFromXPointer(a_xpointer)
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local top_y = self.ui.document:getCurrentPos()
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-- (strange, but using doc_margins.top is accurate even in scroll mode)
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local screen_y = doc_y - top_y + doc_margins["top"]
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local screen_x = doc_x + doc_margins["left"]
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-- Get again link and a_xpointer from this position
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local re_link_xpointer, re_a_xpointer = self.ui.document:getLinkFromPosition({x = screen_x, y = screen_y}) -- luacheck: no unused
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-- We should get the same a_xpointer. If not, crengine has messed up
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-- and we should not trust this xpointer to get back to this link.
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if re_a_xpointer ~= a_xpointer then
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-- Try it again with screen_x+1 (in the rare cases where screen_x
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-- fails, screen_x+1 usually works - probably something in crengine,
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-- but easier to workaround here that way)
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re_link_xpointer, re_a_xpointer = self.ui.document:getLinkFromPosition({x = screen_x+1, y = screen_y}) -- luacheck: no unused
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if re_a_xpointer ~= a_xpointer then
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logger.info("not coherent a_xpointer:", a_xpointer)
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return false
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end
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end
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return true
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end
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--- Gets link from gesture.
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-- `Document:getLinkFromPosition()` behaves differently depending on
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-- document type, so this function provides a wrapper.
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function ReaderLink:getLinkFromGes(ges)
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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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if pos then
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-- link box in native page
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local link, lbox = self.ui.document:getLinkFromPosition(pos.page, pos)
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if link and lbox then
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return {
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link = link,
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lbox = lbox,
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pos = pos,
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}
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end
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end
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else
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local link_xpointer, a_xpointer = self.ui.document:getLinkFromPosition(ges.pos)
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logger.dbg("getLinkFromPosition link_xpointer:", link_xpointer)
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logger.dbg("getLinkFromPosition a_xpointer:", a_xpointer)
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-- On some documents, crengine may sometimes give a wrong a_xpointer
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-- (in some Wikipedia saved as EPUB, it would point to some other <A>
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-- element in the same paragraph). If followed then back, we could get
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-- to a different page. So, we check here how valid it is, and if not,
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-- we just discard it so that addCurrentLocationToStack() is used.
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if a_xpointer and not self:isXpointerCoherent(a_xpointer) then
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a_xpointer = nil
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end
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if link_xpointer ~= "" then
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-- This link's target xpointer is more precise than a classic
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-- xpointer to top of a page: we can show a marker at its
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-- y-position in target page
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return {
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xpointer = link_xpointer,
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marker_xpointer = link_xpointer,
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from_xpointer = a_xpointer,
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}
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end
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end
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end
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--- Highlights a linkbox if available and goes to it.
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function ReaderLink:showLinkBox(link)
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if link and link.lbox then -- pdfdocument
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-- screen box that holds the link
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local sbox = self.view:pageToScreenTransform(link.pos.page,
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self.ui.document:nativeToPageRectTransform(link.pos.page, link.lbox))
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if sbox then
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UIManager:show(LinkBox:new{
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box = sbox,
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timeout = FOLLOW_LINK_TIMEOUT,
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callback = function() self:onGotoLink(link.link) end
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})
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return true
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end
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elseif link and link.xpointer ~= "" then -- credocument
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return self:onGotoLink(link)
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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(_, ges)
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if not isTapToFollowLinksOn() then return end
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local link = self:getLinkFromGes(ges)
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if link then
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return self:showLinkBox(link)
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end
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end
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--- Remember current location so we can go back to it
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function ReaderLink:addCurrentLocationToStack()
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if self.ui.document.info.has_pages then
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table.insert(self.location_stack, self.ui.paging:getBookLocation())
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else
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table.insert(self.location_stack, {
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xpointer = self.ui.rolling:getBookLocation(),
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})
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end
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end
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--- Goes to link.
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function ReaderLink:onGotoLink(link, neglect_current_location)
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logger.dbg("onGotoLink:", link)
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if self.ui.document.info.has_pages then
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-- internal pdf links have a "page" attribute, while external ones have an "uri" attribute
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if link.page then -- Internal link
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logger.dbg("Internal link:", link)
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if not neglect_current_location then
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self:addCurrentLocationToStack()
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end
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self.ui:handleEvent(Event:new("GotoPage", link.page + 1))
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return true
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end
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link = link.uri -- external link
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else
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-- For crengine, internal links may look like :
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-- #_doc_fragment_0_Organisation (link from anchor)
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-- /body/DocFragment/body/ul[2]/li[5]/text()[3].16 (xpointer from full-text search)
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-- If the XPointer does not exist (or is a full url), we will jump to page 1
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-- Best to check that this link exists in document with the following,
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-- which accepts both of the above legitimate xpointer as input.
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if self.ui.document:isXPointerInDocument(link.xpointer) then
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logger.dbg("Internal link:", link)
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if not neglect_current_location then
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if link.from_xpointer then
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-- We have a more precise xpointer than the xpointer to top of
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-- current page that addCurrentLocationToStack() would give, and
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-- we may be able to show a marker when back
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local saved_location
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if self.view.view_mode == "scroll" then
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-- In scroll mode, we still use the top of page as the
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-- xpointer to go back to, so we get back to the same view.
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-- We can still show the marker at the link position
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saved_location = {
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xpointer = self.ui.rolling:getBookLocation(),
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marker_xpointer = link.from_xpointer,
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}
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else
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-- In page mode, we use the same for go to and for marker,
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-- as 'page mode' ensures we get back to the same view.
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saved_location = {
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xpointer = link.from_xpointer,
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marker_xpointer = link.from_xpointer,
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}
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end
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table.insert(self.location_stack, saved_location)
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else
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self:addCurrentLocationToStack()
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end
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end
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self.ui:handleEvent(Event:new("GotoXPointer", link.xpointer, link.marker_xpointer))
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return true
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end
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end
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logger.dbg("External link:", link)
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-- Check if it is a wikipedia link
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local wiki_lang, wiki_page = link.xpointer:match([[https?://([^%.]+).wikipedia.org/wiki/([^/]+)]])
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if wiki_lang and wiki_page then
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logger.dbg("Wikipedia link:", wiki_lang, wiki_page)
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-- Ask for user confirmation before launching lookup (on a
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-- wikipedia page saved as epub, full of wikipedia links, it's
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-- too easy to click on links when wanting to change page...)
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-- But first check if this wikipedia article has been saved as EPUB
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local epub_filename = util.replaceInvalidChars(wiki_page:gsub("_", " ")) .. "."..string.upper(wiki_lang)..".epub"
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local epub_fullpath
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-- either in current book directory
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local last_file = G_reader_settings:readSetting("lastfile")
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if last_file then
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local current_book_dir = last_file:match("(.*)/")
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local epub_path = current_book_dir .. "/" .. epub_filename
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if util.pathExists(epub_path) then
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epub_fullpath = epub_path
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end
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end
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-- or in wikipedia save directory
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if not epub_fullpath then
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local dir = G_reader_settings:readSetting("wikipedia_save_dir")
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if not dir then dir = G_reader_settings:readSetting("home_dir") end
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if not dir then dir = require("apps/filemanager/filemanagerutil").getDefaultDir() end
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if dir then
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local epub_path = dir .. "/" .. epub_filename
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if util.pathExists(epub_path) then
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epub_fullpath = epub_path
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end
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end
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end
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if epub_fullpath then
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local MultiConfirmBox = require("ui/widget/multiconfirmbox")
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UIManager:show(MultiConfirmBox:new{
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text = T(_("Would you like to read this Wikipedia %1 article?\n\n%2\n\nThis article has previously been saved as EPUB. You may wish to read the saved EPUB instead."), wiki_lang:upper(), wiki_page:gsub("_", " "), epub_fullpath),
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choice1_text = _("Read online"),
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choice1_callback = function()
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UIManager:nextTick(function()
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self.ui:handleEvent(Event:new("LookupWikipedia", wiki_page, false, true, wiki_lang))
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end)
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end,
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choice2_text = _("Read EPUB"),
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choice2_callback = function()
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UIManager:scheduleIn(0.1, function()
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self.ui:switchDocument(epub_fullpath)
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end)
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end,
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})
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else
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UIManager:show(ConfirmBox:new{
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text = T(_("Would you like to read this Wikipedia %1 article?\n\n%2\n"), wiki_lang:upper(), wiki_page:gsub("_", " ")),
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ok_callback = function()
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UIManager:nextTick(function()
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self.ui:handleEvent(Event:new("LookupWikipedia", wiki_page, false, true, wiki_lang))
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end)
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end
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})
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end
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return true
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end
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-- Check if it is a link to a local file
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local linked_filename = link.xpointer:gsub("^file:", "") -- remove local file protocol if any
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local anchor
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if linked_filename:find("?") then -- remove any query string (including any following anchor)
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linked_filename, anchor = linked_filename:match("^(.-)(%?.*)$")
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elseif linked_filename:find("#") then -- remove any anchor
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linked_filename, anchor = linked_filename:match("^(.-)(#.*)$")
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end
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linked_filename = ffiutil.joinPath(self.document_dir, linked_filename) -- get full path
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linked_filename = ffiutil.realpath(linked_filename) -- clean full path from ./ or ../
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if linked_filename and lfs.attributes(linked_filename, "mode") == "file" then
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local DocumentRegistry = require("document/documentregistry")
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local provider = DocumentRegistry:getProvider(linked_filename)
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if provider then
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-- Display filename with anchor or query string, so the user gets
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-- this information and can manually go to the appropriate place
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local display_filename = linked_filename
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if anchor then
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display_filename = display_filename .. anchor
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end
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UIManager:show(ConfirmBox:new{
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text = T(_("Would you like to read this local document?\n\n%1\n"), display_filename),
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ok_callback = function()
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UIManager:scheduleIn(0.1, function()
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self.ui:switchDocument(linked_filename)
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end)
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end
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})
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else
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UIManager:show(InfoMessage:new{
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text = T(_("Link to unsupported local file:\n%1"), link.xpointer),
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})
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end
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return true
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end
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-- Not supported
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UIManager:show(InfoMessage:new{
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text = T(_("Invalid or external link:\n%1"), link.xpointer),
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-- no timeout to allow user to type that link in his web browser
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})
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-- don't propagate, user will notice and tap elsewhere if he wants to change page
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return true
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end
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--- Goes back to previous location.
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function ReaderLink:onGoBackLink()
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local saved_location = table.remove(self.location_stack)
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if saved_location then
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logger.dbg("GoBack: restoring:", saved_location)
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self.ui:handleEvent(Event:new('RestoreBookLocation', saved_location))
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return true
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end
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end
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function ReaderLink:onSwipe(arg, ges)
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|
if ges.direction == "east" then
|
|
if isSwipeToGoBackEnabled() then
|
|
if #self.location_stack > 0 then
|
|
-- Remember if location stack is going to be empty, so we
|
|
-- can stop the propagation of next swipe back: so the user
|
|
-- knows it is empty and that next swipe back will get him
|
|
-- to previous page (and not to previous location)
|
|
self.swipe_back_resist = #self.location_stack == 1
|
|
return self:onGoBackLink()
|
|
elseif self.swipe_back_resist then
|
|
self.swipe_back_resist = false
|
|
-- Make that gesture don't do anything, and show a Notification
|
|
-- so the user knows why
|
|
UIManager:show(Notification:new{
|
|
text = _("Location history is empty"),
|
|
timeout = 2,
|
|
})
|
|
return true
|
|
end
|
|
end
|
|
elseif ges.direction == "west" then
|
|
local ret = false
|
|
if isSwipeToFollowFirstLinkEnabled() then
|
|
ret = self:onGoToPageLink(ges, true)
|
|
elseif isSwipeToFollowNearestLinkEnabled() then
|
|
ret = self:onGoToPageLink(ges)
|
|
end
|
|
-- If no link found, or no follow link option enabled,
|
|
-- jump to latest bookmark (if enabled)
|
|
if not ret and isSwipeToJumpToLatestBookmarkEnabled() then
|
|
ret = self:onGoToLatestBookmark(ges)
|
|
end
|
|
return ret
|
|
end
|
|
end
|
|
|
|
--- Goes to link nearest to the gesture (or first link in page)
|
|
function ReaderLink:onGoToPageLink(ges, use_page_first_link)
|
|
local selected_link = nil
|
|
if self.ui.document.info.has_pages then
|
|
local pos = self.view:screenToPageTransform(ges.pos)
|
|
if not pos then
|
|
return
|
|
end
|
|
local links = self.ui.document:getPageLinks(pos.page)
|
|
if not links or #links == 0 then
|
|
return
|
|
end
|
|
-- DEBUG("PDF Page links : ", links)
|
|
-- We may get multiple links: internal ones (with "page" key)
|
|
-- that we're interested in, but also external links (no "page", but
|
|
-- a "uri" key) that we don't care about.
|
|
-- [2] = {
|
|
-- ["y1"] = 107.88977050781,
|
|
-- ["x1"] = 176.60360717773,
|
|
-- ["y0"] = 97.944396972656,
|
|
-- ["x0"] = 97,
|
|
-- ["page"] = 347
|
|
-- },
|
|
local pos_x, pos_y = pos.x, pos.y
|
|
local shortest_dist = nil
|
|
local first_y0 = nil
|
|
for _, link in ipairs(links) do
|
|
if link["page"] then
|
|
if use_page_first_link then
|
|
-- Links may not be in the order they are in the page, so let's
|
|
-- find the one with the smallest y0.
|
|
if first_y0 == nil or link["y0"] < first_y0 then
|
|
selected_link = link
|
|
first_y0 = link["y0"]
|
|
end
|
|
else
|
|
local start_dist = math.pow(link.x0 - pos_x, 2) + math.pow(link.y0 - pos_y, 2)
|
|
local end_dist = math.pow(link.x1 - pos_x, 2) + math.pow(link.y1 - pos_y, 2)
|
|
local min_dist = math.min(start_dist, end_dist)
|
|
if shortest_dist == nil or min_dist < shortest_dist then
|
|
-- onGotoLink()'s GotoPage event needs the link
|
|
-- itself, and will use its "page" value
|
|
selected_link = link
|
|
shortest_dist = min_dist
|
|
end
|
|
end
|
|
end
|
|
end
|
|
else
|
|
local links = self.ui.document:getPageLinks()
|
|
if not links or #links == 0 then
|
|
return
|
|
end
|
|
-- DEBUG("CRE Page links : ", links)
|
|
-- We may get multiple links: internal ones (they have a "section" key)
|
|
-- that we're interested in, but also external links (no "section", but
|
|
-- a "uri" key) that we don't care about.
|
|
-- [1] = {
|
|
-- ["end_x"] = 825,
|
|
-- ["uri"] = "",
|
|
-- ["end_y"] = 333511,
|
|
-- ["start_x"] = 90,
|
|
-- ["start_y"] = 333511
|
|
-- },
|
|
-- [2] = {
|
|
-- ["end_x"] = 366,
|
|
-- ["section"] = "#_doc_fragment_19_ftn_fn6",
|
|
-- ["end_y"] = 1201,
|
|
-- ["start_x"] = 352,
|
|
-- ["start_y"] = 1201
|
|
-- ["a_xpointer"] = "/body/DocFragment/body/div/p[12]/sup[3]/a[3].0",
|
|
-- },
|
|
-- Note: with some documents and some links, crengine may give wrong
|
|
-- coordinates, and our code below may miss or give the wrong first
|
|
-- or nearest link...
|
|
local pos_x, pos_y = ges.pos.x, ges.pos.y
|
|
local shortest_dist = nil
|
|
local first_start_y = nil
|
|
for _, link in ipairs(links) do
|
|
if link["section"] then
|
|
if use_page_first_link then
|
|
-- links may not be in the order they are in the page, so let's
|
|
-- find the one with the smallest start_y.
|
|
if first_start_y == nil or link["start_y"] < first_start_y then
|
|
selected_link = link
|
|
first_start_y = link["start_y"]
|
|
end
|
|
else
|
|
local start_dist = math.pow(link.start_x - pos_x, 2) + math.pow(link.start_y - pos_y, 2)
|
|
local end_dist = math.pow(link.end_x - pos_x, 2) + math.pow(link.end_y - pos_y, 2)
|
|
local min_dist = math.min(start_dist, end_dist)
|
|
if shortest_dist == nil or min_dist < shortest_dist then
|
|
selected_link = link
|
|
shortest_dist = min_dist
|
|
end
|
|
end
|
|
end
|
|
end
|
|
-- cre.cpp getPageLinks() does highlight found links :
|
|
-- sel.add( new ldomXRange(*links[i]) ); // highlight
|
|
-- and we'll find them highlighted when back from link.
|
|
-- So let's clear them now.
|
|
self.ui.document:clearSelection()
|
|
-- (Comment out previous line to visually see which links on the
|
|
-- page are not coherent: those not highlighted)
|
|
|
|
if selected_link then
|
|
logger.dbg("original selected_link", selected_link)
|
|
-- Make it a link as expected by onGotoLink
|
|
selected_link = {
|
|
xpointer = selected_link["section"],
|
|
marker_xpointer = selected_link["section"],
|
|
from_xpointer = selected_link["a_xpointer"],
|
|
}
|
|
logger.dbg("selected_link", selected_link)
|
|
-- Check from_xpointer is coherent, and unset it if not
|
|
if selected_link.from_xpointer and not self:isXpointerCoherent(selected_link.from_xpointer) then
|
|
selected_link.from_xpointer = nil
|
|
end
|
|
|
|
end
|
|
end
|
|
if selected_link then
|
|
return self:onGotoLink(selected_link)
|
|
end
|
|
end
|
|
|
|
function ReaderLink:onGoToLatestBookmark(ges)
|
|
local latest_bookmark = self.ui.bookmark:getLatestBookmark()
|
|
if latest_bookmark then
|
|
if self.ui.document.info.has_pages then
|
|
-- self:onGotoLink() needs something with a page attribute.
|
|
-- we need to substract 1 to bookmark page, as links start from 0
|
|
-- and onGotoLink will add 1 - we need a fake_link (with a single
|
|
-- page attribute) so we don't touch the bookmark itself
|
|
local fake_link = {}
|
|
fake_link.page = latest_bookmark.page - 1
|
|
return self:onGotoLink(fake_link)
|
|
else
|
|
-- Make it a link as expected by onGotoLink
|
|
local link
|
|
if latest_bookmark.pos0 then -- text highlighted, precise xpointer
|
|
link = {
|
|
xpointer = latest_bookmark.pos0,
|
|
marker_xpointer = latest_bookmark.pos0,
|
|
}
|
|
else -- page bookmarked, 'page' is a xpointer to top of page
|
|
link = {
|
|
xpointer = latest_bookmark.page,
|
|
}
|
|
end
|
|
return self:onGotoLink(link)
|
|
end
|
|
end
|
|
end
|
|
|
|
return ReaderLink
|