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cre: tweak current page highlights detection

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No need to use current page and xpointers. We can use
'pos', in both scroll and page modes, as it is always
accurate to show the y of the current view.
This commit is contained in:
poire-z
2019-03-13 13:05:50 +01:00
parent 1a4faad17c
commit 0948a4b656
2 changed files with 30 additions and 60 deletions
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45
frontend/apps/reader/modules/readerhighlight.lua
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@@ -207,7 +207,7 @@ function ReaderHighlight:onTapXPointerSavedHighlight(ges)
-- showing menu...). We might want to cache these boxes per page (and
-- clear that cache when page layout change or highlights are added
-- or removed).
local cur_page, cur_page2, cur_scroll_top, cur_scroll_bottom
local cur_view_top, cur_view_bottom
local pos = self.view:screenToPageTransform(ges.pos)
for page, _ in pairs(self.view.highlight.saved) do
local items = self.view.highlight.saved[page]
@@ -216,37 +216,22 @@ function ReaderHighlight:onTapXPointerSavedHighlight(ges)
local pos0, pos1 = items[i].pos0, items[i].pos1
-- document:getScreenBoxesFromPositions() is expensive, so we
-- first check this item is on current page
local is_in_view = false
if self.view.view_mode == "page" then
if not cur_page then
cur_page = self.ui.document:getPageFromXPointer(self.ui.document:getXPointer())
if self.ui.document:getVisiblePageCount() > 1 then
cur_page2 = cur_page + 1
end
end
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)
if start_page <= cur_page and end_page >= cur_page then
is_in_view = true
elseif cur_page2 and start_page <= cur_page2 and end_page >= cur_page2 then
is_in_view = true
end
else
if not cur_scroll_top then
cur_scroll_top = self.ui.document:getPosFromXPointer(self.ui.document:getXPointer())
cur_scroll_bottom = cur_scroll_top + self.ui.dimen.h
end
local spos0 = self.ui.document:getPosFromXPointer(pos0)
local spos1 = self.ui.document:getPosFromXPointer(pos1)
local start_pos = math.min(spos0, spos1)
local end_pos = math.max(spos0, spos1)
if start_pos <= cur_scroll_bottom and end_pos >= cur_scroll_top then
is_in_view = true
if not cur_view_top then
-- Even in page mode, it's safer to use pos and ui.dimen.h
-- than pages' xpointers pos, even if ui.dimen.h is a bit
-- larger than pages' heights
cur_view_top = self.ui.document:getCurrentPos()
if self.view.view_mode == "page" and self.ui.document:getVisiblePageCount() > 1 then
cur_view_bottom = cur_view_top + 2 * self.ui.dimen.h
else
cur_view_bottom = cur_view_top + self.ui.dimen.h
end
end
if is_in_view then
local spos0 = self.ui.document:getPosFromXPointer(pos0)
local spos1 = self.ui.document:getPosFromXPointer(pos1)
local start_pos = math.min(spos0, spos1)
local end_pos = math.max(spos0, spos1)
if start_pos <= cur_view_bottom and end_pos >= cur_view_top then
local boxes = self.ui.document:getScreenBoxesFromPositions(pos0, pos1, true) -- get_segments=true
if boxes then
for index, box in pairs(boxes) do