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Redraw current page if necessary on pressing Back

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For PDF and DjVu files (but not for crereader) the command handler for
"Back" key can call addJump() in order to avoid losing the top of the
jump history on return. This (addJump()) can cause the TOC to be
retrieved and the message "Retrieving TOC..." to be displayed.
If this happens then we need to redraw the current page after displaying
our own "Already first jump!" message.
This commit is contained in:
Tigran Aivazian 2012-09-26 16:05:07 +01:00
parent 0987c2826e
commit 5d82ffe984
1 changed files with 9 additions and 0 deletions
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9
unireader.lua
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@ -2261,7 +2261,13 @@ function UniReader:addAllCommands()
"go backward in jump history", "go backward in jump history",
function(unireader) function(unireader)
local prev_jump_no = 0 local prev_jump_no = 0
local need_refresh = false
if unireader.jump_history.cur > #unireader.jump_history then if unireader.jump_history.cur > #unireader.jump_history then
-- addJump() will cause a "Retrieving TOC..." msg, so we'll
-- need to redraw the page after our own
-- ifo msg "Already first jump!" below
if not self.toc then need_refresh = true end
-- if cur points to head, put current page in history -- if cur points to head, put current page in history
unireader:addJump(self.pageno) unireader:addJump(self.pageno)
prev_jump_no = unireader.jump_history.cur - 2 prev_jump_no = unireader.jump_history.cur - 2
@ -2274,6 +2280,9 @@ function UniReader:addAllCommands()
unireader:goto(unireader.jump_history[prev_jump_no].page, true) unireader:goto(unireader.jump_history[prev_jump_no].page, true)
else else
showInfoMsgWithDelay("Already first jump!", 2000, 1) showInfoMsgWithDelay("Already first jump!", 2000, 1)
if need_refresh then
unireader:redrawCurrentPage()
end
end end
end) end)
self.commands:add(KEY_BACK,MOD_SHIFT,"Back", self.commands:add(KEY_BACK,MOD_SHIFT,"Back",