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[fix] Optimize cre highlights onTap and drawing (#3508)

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drawXPointerSavedHighlight() and onTapXPointerSavedHighlight were
looping thru all credocuments highlights, which was expensive.
Now, we first check with cheaper getPageFromXPointer() the highlights
are on the current page before doing more expensive stuff.

Closes #3503.
This commit is contained in:
poire-z
2017-11-20 21:58:58 +01:00
committed by Frans de Jonge
parent a6de9ff7d4
commit 2697a30166
2 changed files with 60 additions and 18 deletions
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37
frontend/apps/reader/modules/readerhighlight.lua
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@@ -178,7 +178,7 @@ function ReaderHighlight:onTapPageSavedHighlight(ges)
if boxes then
for index, box in pairs(boxes) do
if inside_box(pos, box) then
logger.dbg("Tap on hightlight")
logger.dbg("Tap on highlight")
return self:onShowHighlightDialog(page, i)
end
end
@@ -189,18 +189,39 @@ function ReaderHighlight:onTapPageSavedHighlight(ges)
end
function ReaderHighlight:onTapXPointerSavedHighlight(ges)
local cur_page
-- In scroll mode, we'll need to check for highlights in previous or next
-- page too as some parts of them may be displayed
local neighbour_pages = self.view.view_mode ~= "page" and 1 or 0
local pos = self.view:screenToPageTransform(ges.pos)
for page, _ in pairs(self.view.highlight.saved) do
local items = self.view.highlight.saved[page]
if items then
for i = 1, #items do
if not cur_page then
cur_page = self.ui.document:getPageFromXPointer(self.ui.document:getXPointer())
end
local pos0, pos1 = items[i].pos0, items[i].pos1
local boxes = self.ui.document:getScreenBoxesFromPositions(pos0, pos1)
if boxes then
for index, box in pairs(boxes) do
if inside_box(pos, box) then
logger.dbg("Tap on hightlight")
return self:onShowHighlightDialog(page, i)
-- document:getScreenBoxesFromPositions() is expensive, so we
-- first check this item is on current page
local page0 = self.ui.document:getPageFromXPointer(pos0)
local page1 = self.ui.document:getPageFromXPointer(pos1)
local start_page = math.min(page0, page1)
local end_page = math.max(page0, page1)
-- In scroll mode, we may be displaying cur_page and cur_page+1, so
-- we have to check the highlight start_page is <= cur_page+1.
-- Same thinking with highlight's end_page >= cur_page-1 as we may
-- be displaying a part of cur_page-1.
-- (A highlight starting on cur_page-17 and ending on cur_page+13 is
-- a highlight to consider)
if start_page <= cur_page + neighbour_pages and end_page >= cur_page - neighbour_pages then
local boxes = self.ui.document:getScreenBoxesFromPositions(pos0, pos1)
if boxes then
for index, box in pairs(boxes) do
if inside_box(pos, box) then
logger.dbg("Tap on highlight")
return self:onShowHighlightDialog(page, i)
end
end
end
end
@@ -561,7 +582,7 @@ function ReaderHighlight:saveHighlight()
self.ui.bookmark:addBookmark(bookmark_item)
end
--[[
-- disable exporting hightlights to My Clippings
-- disable exporting highlights to My Clippings
-- since it's not portable and there is a better Evernote plugin
-- to do the same thing
if self.selected_text.text ~= "" then