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pdfdocument: cache page text (#10450)

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Updating the selection queries the same page tens of times per second. This prevents KOReader from keeping up with high-frequency input event streams.

Fixes #10443. Relies on koreader/koreader-base#1612.
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hrdl 2023-05-18 20:08:50 +00:00 committed by GitHub
parent 796574e5cd
commit 20101baef6
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1 changed files with 11 additions and 4 deletions
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15
frontend/document/pdfdocument.lua
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@ -103,10 +103,17 @@ function PdfDocument:comparePositions(pos1, pos2)
end
function PdfDocument:getPageTextBoxes(pageno)
local page = self._document:openPage(pageno)
local text = page:getPageText()
page:close()
return text
local hash = "textbox|"..self.file.."|"..pageno
local cached = DocCache:check(hash)
if not cached then
local page = self._document:openPage(pageno)
local text = page:getPageText()
page:close()
DocCache:insert(hash, CacheItem:new{text=text, size=text.size})
return text
else
return cached.text
end
end
function PdfDocument:getPanelFromPage(pageno, pos)