mirror of https://github.com/koreader/koreader
Merge remote-tracking branch 'origin/new_ui_code' into new_ui_code
Qingping Hou
12 years ago
commit
86a3ff6447
@ -0,0 +1,153 @@
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require "cache"
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require "ui/geometry"
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DjvuDocument = Document:new{
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_document = false,
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-- libdjvulibre manages its own additional cache, default value is hard written in c module.
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djvulibre_cache_size = nil,
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dc_null = DrawContext.new()
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}
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function DjvuDocument:init()
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local ok
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ok, self._document = pcall(djvu.openDocument, self.file, self.djvulibre_cache_size)
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if not ok then
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self.error_message = self.doc -- will contain error message
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return
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end
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self.is_open = true
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self.info.has_pages = true
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self:_readMetadata()
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end
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function DjvuDocument:_readMetadata()
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self.info.number_of_pages = self._document:getPages()
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return true
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end
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function DjvuDocument:close()
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if self.is_open then
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self.is_open = false
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self._document:close()
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end
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end
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function DjvuDocument:getNativePageDimensions(pageno)
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local hash = "pgdim|"..self.file.."|"..pageno
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local cached = Cache:check(hash)
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if cached then
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return cached[1]
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end
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local page = self._document:openPage(pageno)
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local page_size_w, page_size_h = page:getSize(self.dc_null)
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local page_size = Geom:new{ w = page_size_w, h = page_size_h }
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Cache:insert(hash, CacheItem:new{ page_size })
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page:close()
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return page_size
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end
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function DjvuDocument:getUsedBBox(pageno)
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--local hash = "pgubbox|"..self.file.."|"..pageno
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--local cached = Cache:check(hash)
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--if cached then
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--return cached.data
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--end
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--local page = self._document:openPage(pageno)
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local used = {}
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used.x, used.y, used.w, used.h = 0.01, 0.01, -0.01, -0.01
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--Cache:insert(hash, CacheItem:new{ used })
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--page:close()
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return used
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end
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function DjvuDocument:getPageText(pageno)
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-- is this worth caching? not done yet.
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local page = self._document:openPage(pageno)
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local text = page:getPageText()
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page:close()
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return text
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end
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function DjvuDocument:renderPage(pageno, rect, zoom, rotation)
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local hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation
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local page_size = self:getPageDimensions(pageno, zoom, rotation)
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-- this will be the size we actually render
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local size = page_size
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-- we prefer to render the full page, if it fits into cache
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if not Cache:willAccept(size.w * size.h / 2) then
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-- whole page won't fit into cache
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DEBUG("rendering only part of the page")
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-- TODO: figure out how to better segment the page
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if not rect then
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DEBUG("aborting, since we do not have a specification for that part")
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-- required part not given, so abort
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return
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end
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-- only render required part
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hash = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..tostring(rect)
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size = rect
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end
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-- prepare cache item with contained blitbuffer
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local tile = CacheItem:new{
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size = size.w * size.h / 2 + 64, -- estimation
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excerpt = size,
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pageno = pageno,
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bb = Blitbuffer.new(size.w, size.h)
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}
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-- create a draw context
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local dc = DrawContext.new()
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dc:setRotate(rotation)
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-- correction of rotation
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if rotation == 90 then
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dc:setOffset(page_size.w, 0)
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elseif rotation == 180 then
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dc:setOffset(page_size.w, page_size.h)
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elseif rotation == 270 then
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dc:setOffset(0, page_size.h)
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end
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dc:setZoom(zoom)
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-- render
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local page = self._document:openPage(pageno)
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page:draw(dc, tile.bb, size.x, size.y)
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page:close()
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Cache:insert(hash, tile)
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return tile
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end
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-- a hint for the cache engine to paint a full page to the cache
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-- TODO: this should trigger a background operation
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function DjvuDocument:hintPage(pageno, zoom, rotation)
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self:renderPage(pageno, nil, zoom, rotation)
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end
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function DjvuDocument:drawPage(target, x, y, rect, pageno, zoom, rotation)
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local hash_full_page = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation
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local hash_excerpt = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..tostring(rect)
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local tile = Cache:check(hash_full_page)
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if not tile then
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tile = Cache:check(hash_excerpt)
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if not tile then
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DEBUG("rendering")
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tile = self:renderPage(pageno, rect, zoom, rotation)
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end
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end
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DEBUG("now painting", tile)
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target:blitFrom(tile.bb, x, y, rect.x - tile.excerpt.x, rect.y - tile.excerpt.y, rect.w, rect.h)
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end
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function DjvuDocument:invertTextYAxel(pageno, text_table)
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local _, height = self.doc:getOriginalPageSize(pageno)
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for _,text in pairs(text_table) do
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for _,line in ipairs(text) do
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line.y0, line.y1 = (height - line.y1), (height - line.y0)
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end
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end
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return text_table
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end
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DocumentRegistry:addProvider("djvu", "application/djvu", DjvuDocument)
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@ -0,0 +1,57 @@
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require "ui/dialog" -- for Menu
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FileChooser = Menu:new{
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path = ".",
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parent = nil,
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show_hidden = false,
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filter = function(filename) return true end,
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}
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function FileChooser:init()
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self:changeToPath(self.path)
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end
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function FileChooser:changeToPath(path)
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local dirs = {}
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local files = {}
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self.path = path
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for f in lfs.dir(self.path) do
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if self.show_hidden or not string.match(f, "^%.[^.]") then
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local filename = self.path.."/"..f
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local filemode = lfs.attributes(filename, "mode")
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if filemode == "directory" and f ~= "." and f~=".." then
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table.insert(dirs, f)
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elseif filemode == "file" then
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if self.filter(filename) then
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table.insert(files, f)
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end
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end
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end
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end
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table.sort(dirs)
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if self.path ~= "/" then table.insert(dirs, 1, "..") end
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table.sort(files)
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self.item_table = {}
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for _, dir in ipairs(dirs) do
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table.insert(self.item_table, { text = dir.."/", path = self.path.."/"..dir })
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end
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for _, file in ipairs(files) do
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table.insert(self.item_table, { text = file, path = self.path.."/"..file })
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end
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Menu.init(self) -- call parent's init()
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end
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function FileChooser:onSelect()
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local selected = self.item_table[(self.page-1)*self.perpage+self.selected.y]
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if lfs.attributes(selected.path, "mode") == "directory" then
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UIManager:close(self)
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self:changeToPath(selected.path)
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UIManager:show(self)
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else
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UIManager:close(self)
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self.on_select_callback(self.item_table[self.selected.y])
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end
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return true
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end
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