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fix bug in jump_history

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record current page when jump_history.cur points to
empty head.
This commit is contained in:
Qingping Hou
2012-04-30 20:33:10 +08:00
parent c818d7e90e
commit c275862ffe
1 changed files with 17 additions and 1 deletions
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18
unireader.lua
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@@ -1683,6 +1683,10 @@ function UniReader:showJumpHist()
local jump_item = self.jump_history[item_no]
self.jump_history.cur = item_no
self:goto(jump_item.page, true)
-- set new head if we reached the top of backward stack
if self.jump_history.cur == #self.jump_history then
self.jump_history.cur = self.jump_history.cur + 1
end
else
self:redrawCurrentPage()
end
@@ -1888,7 +1892,15 @@ function UniReader:addAllCommands()
self.commands:add(KEY_BACK,nil,"Back",
"go backward in jump history",
function(unireader)
local prev_jump_no = unireader.jump_history.cur - 1
local prev_jump_no = 0
if unireader.jump_history.cur > #unireader.jump_history then
-- if cur points to head, put current page in history
unireader:addJump(self.pageno)
prev_jump_no = unireader.jump_history.cur - 2
else
prev_jump_no = unireader.jump_history.cur - 1
end
if prev_jump_no >= 1 then
unireader.jump_history.cur = prev_jump_no
unireader:goto(unireader.jump_history[prev_jump_no].page, true)
@@ -1903,6 +1915,10 @@ function UniReader:addAllCommands()
if next_jump_no <= #self.jump_history then
unireader.jump_history.cur = next_jump_no
unireader:goto(unireader.jump_history[next_jump_no].page, true)
-- set new head if we reached the top of backward stack
if unireader.jump_history.cur == #unireader.jump_history then
unireader.jump_history.cur = unireader.jump_history.cur + 1
end
else
showInfoMsgWithDelay("Already last jump!", 2000, 1)
end