mirror of
https://github.com/koreader/koreader.git
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8e4516b824
In regional zoom mode double tap will zoom to the tapped region(paragraph or column, etc., detected optically via libk2pdfopt). As the first demo, this feature is only turned on in flipping mode by tapping the top-left corner of the screen. Eventually we may incorporate this feature in "free" zoom mode.
127 lines
3.7 KiB
Lua
127 lines
3.7 KiB
Lua
local Cache = require("cache")
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local CacheItem = require("cacheitem")
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local KoptOptions = require("ui/data/koptoptions")
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local KoptInterface = require("document/koptinterface")
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local Document = require("document/document")
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local Configurable = require("ui/reader/configurable")
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local DrawContext = require("ffi/drawcontext")
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local PdfDocument = Document:new{
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_document = false,
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-- muPDF manages its own additional cache
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mupdf_cache_size = 5 * 1024 * 1024,
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dc_null = DrawContext.new(),
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options = KoptOptions,
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koptinterface = KoptInterface,
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}
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function PdfDocument:init()
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require "libs/libkoreader-pdf"
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self.configurable:loadDefaults(self.options)
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local ok
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ok, self._document = pcall(pdf.openDocument, self.file, self.mupdf_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.info.configurable = true
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if self._document:needsPassword() then
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self.is_locked = true
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else
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self:_readMetadata()
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end
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end
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function PdfDocument:unlock(password)
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if not self._document:authenticatePassword(password) then
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self._document:close()
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return false, "wrong password"
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end
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self.is_locked = false
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return self:_readMetadata()
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end
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function PdfDocument:getPageTextBoxes(pageno)
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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 PdfDocument:getWordFromPosition(spos)
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return self.koptinterface:getWordFromPosition(self, spos)
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end
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function PdfDocument:getTextFromPositions(spos0, spos1)
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return self.koptinterface:getTextFromPositions(self, spos0, spos1)
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end
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function PdfDocument:getPageBoxesFromPositions(pageno, ppos0, ppos1)
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return self.koptinterface:getPageBoxesFromPositions(self, pageno, ppos0, ppos1)
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end
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function PdfDocument:getOCRWord(pageno, wbox)
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return self.koptinterface:getOCRWord(self, pageno, wbox)
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end
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function PdfDocument:getOCRText(pageno, tboxes)
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return self.koptinterface:getOCRText(self, pageno, tboxes)
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end
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function PdfDocument:getPageRegions(pageno)
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return self.koptinterface:getPageRegions(self, pageno)
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end
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function PdfDocument: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.ubbox
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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.x0, used.y0, used.x1, used.y1 = page:getUsedBBox()
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local pwidth, pheight = page:getSize(self.dc_null)
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-- clamp to page BBox
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if used.x0 < 0 then used.x0 = 0 end
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if used.x1 > pwidth then used.x1 = pwidth end
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if used.y0 < 0 then used.y0 = 0 end
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if used.y1 > pheight then used.y1 = pheight end
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--@TODO give size for cacheitem? 02.12 2012 (houqp)
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Cache:insert(hash, CacheItem:new{
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ubbox = used,
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})
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page:close()
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return used
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end
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function PdfDocument:getPageBBox(pageno)
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return self.koptinterface:getPageBBox(self, pageno)
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end
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function PdfDocument:getPageDimensions(pageno, zoom, rotation)
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return self.koptinterface:getPageDimensions(self, pageno, zoom, rotation)
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end
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function PdfDocument:renderPage(pageno, rect, zoom, rotation, gamma, render_mode)
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return self.koptinterface:renderPage(self, pageno, rect, zoom, rotation, gamma, render_mode)
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end
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function PdfDocument:hintPage(pageno, zoom, rotation, gamma, render_mode)
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return self.koptinterface:hintPage(self, pageno, zoom, rotation, gamma, render_mode)
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end
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function PdfDocument:drawPage(target, x, y, rect, pageno, zoom, rotation, gamma, render_mode)
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return self.koptinterface:drawPage(self, target, x, y, rect, pageno, zoom, rotation, gamma, render_mode)
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end
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function PdfDocument:register(registry)
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registry:addProvider("pdf", "application/pdf", self)
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registry:addProvider("cbz", "application/cbz", self)
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registry:addProvider("xps", "application/xps", self)
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end
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return PdfDocument
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