mirror of
https://github.com/koreader/koreader
synced 2024-11-10 01:10:34 +00:00
406 lines
15 KiB
Lua
406 lines
15 KiB
Lua
local BlitBuffer = require("ffi/blitbuffer")
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local CacheItem = require("cacheitem")
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local CanvasContext = require("document/canvascontext")
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local DocCache = require("document/doccache")
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local DocSettings = require("docsettings")
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local Document = require("document/document")
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local DrawContext = require("ffi/drawcontext")
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local logger = require("logger")
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local util = require("util")
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local ffi = require("ffi")
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local C = ffi.C
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local pdf = nil
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local PdfDocument = Document:extend{
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_document = false,
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is_pdf = true,
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dc_null = DrawContext.new(),
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koptinterface = nil,
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provider = "mupdf",
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provider_name = "MuPDF",
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}
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function PdfDocument:init()
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if not pdf then pdf = require("ffi/mupdf") end
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self.koptinterface = require("document/koptinterface")
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self.koptinterface:setDefaultConfigurable(self.configurable)
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local ok
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ok, self._document = pcall(pdf.openDocument, self.file)
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if not ok then
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error(self._document) -- will contain error message
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end
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self:updateColorRendering()
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self.is_reflowable = self._document:isDocumentReflowable()
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self.reflowable_font_size = self:convertKoptToReflowableFontSize()
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-- no-op on PDF
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self:layoutDocument()
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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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self.render_mode = 0
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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:updateColorRendering()
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Document.updateColorRendering(self) -- will set self.render_color
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if self._document then
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self._document:setColorRendering(self.render_color)
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end
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end
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function PdfDocument:layoutDocument(font_size)
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if font_size then
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self.reflowable_font_size = font_size
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end
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self._document:layoutDocument(
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CanvasContext:getWidth(),
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CanvasContext:getHeight(),
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CanvasContext:scaleBySize(self.reflowable_font_size))
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end
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local default_font_size = 22
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-- the koptreader config goes from 0.1 to 3.0, but we want a regular font size
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function PdfDocument:convertKoptToReflowableFontSize(font_size)
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if font_size then
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return font_size * default_font_size
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end
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local size
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if DocSettings:hasSidecarFile(self.file) then
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local doc_settings = DocSettings:open(self.file)
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size = doc_settings:readSetting("kopt_font_size")
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end
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if size then
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return size * default_font_size
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elseif G_reader_settings:readSetting("kopt_font_size") then
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return G_reader_settings:readSetting("kopt_font_size") * default_font_size
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elseif G_defaults:readSetting("DKOPTREADER_CONFIG_FONT_SIZE") then
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return G_defaults:readSetting("DKOPTREADER_CONFIG_FONT_SIZE") * default_font_size
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else
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return default_font_size
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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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return false
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end
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self.is_locked = false
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self:_readMetadata()
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return true
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end
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function PdfDocument:comparePositions(pos1, pos2)
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return self.koptinterface:comparePositions(self, pos1, pos2)
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end
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function PdfDocument:getPageTextBoxes(pageno)
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local hash = "textbox|"..self.file.."|"..pageno
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local cached = DocCache:check(hash)
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if not cached then
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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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DocCache:insert(hash, CacheItem:new{text=text, size=text.size})
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return text
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else
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return cached.text
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end
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end
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function PdfDocument:getPanelFromPage(pageno, pos)
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return self.koptinterface:getPanelFromPage(self, pageno, pos)
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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:getTextBoxes(pageno)
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return self.koptinterface:getTextBoxes(self, pageno)
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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:nativeToPageRectTransform(pageno, rect)
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return self.koptinterface:nativeToPageRectTransform(self, pageno, rect)
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end
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function PdfDocument:getSelectedWordContext(word, nb_words, pos)
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return self.koptinterface:getSelectedWordContext(word, nb_words, pos)
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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:getPageBlock(pageno, x, y)
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return self.koptinterface:getPageBlock(self, pageno, x, y)
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end
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function PdfDocument:getUsedBBox(pageno)
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local hash = "pgubbox|"..self.file.."|"..self.reflowable_font_size.."|"..pageno
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local cached = DocCache: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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DocCache:insert(hash, CacheItem:new{
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ubbox = used,
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size = 256, -- might be closer to 160
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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:getPageLinks(pageno)
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local hash = "pglinks|"..self.file.."|"..self.reflowable_font_size.."|"..pageno
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local cached = DocCache:check(hash)
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if cached then
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return cached.links
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end
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local page = self._document:openPage(pageno)
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local links = page:getPageLinks()
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DocCache:insert(hash, CacheItem:new{
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links = links,
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size = 64 + (8 * 32 * #links),
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})
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page:close()
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return links
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end
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-- returns nil if file is not a pdf, true if document is a writable pdf, false else
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function PdfDocument:_checkIfWritable()
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local suffix = util.getFileNameSuffix(self.file)
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if string.lower(suffix) ~= "pdf" then return nil end
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if self.is_writable == nil then
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local handle = io.open(self.file, 'r+b')
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self.is_writable = handle ~= nil
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if handle then handle:close() end
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end
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return self.is_writable
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end
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local function _quadpointsFromPboxes(pboxes)
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-- will also need mupdf_h.lua to be evaluated once
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-- but this is guaranteed at this point
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local n = #pboxes
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local quadpoints = ffi.new("fz_quad[?]", n)
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for i=1, n do
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-- The order must be left bottom, right bottom, left top, right top.
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-- https://bugs.ghostscript.com/show_bug.cgi?id=695130
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quadpoints[i-1].ll.x = pboxes[i].x
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quadpoints[i-1].ll.y = pboxes[i].y + pboxes[i].h - 1
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quadpoints[i-1].lr.x = pboxes[i].x + pboxes[i].w - 1
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quadpoints[i-1].lr.y = pboxes[i].y + pboxes[i].h - 1
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quadpoints[i-1].ul.x = pboxes[i].x
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quadpoints[i-1].ul.y = pboxes[i].y
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quadpoints[i-1].ur.x = pboxes[i].x + pboxes[i].w - 1
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quadpoints[i-1].ur.y = pboxes[i].y
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end
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return quadpoints, n
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end
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local function _quadpointsToPboxes(quadpoints, n)
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-- reverse of previous function
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local pboxes = {}
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for i=1, n do
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table.insert(pboxes, {
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x = quadpoints[i-1].ul.x,
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y = quadpoints[i-1].ul.y,
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w = quadpoints[i-1].lr.x - quadpoints[i-1].ul.x + 1,
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h = quadpoints[i-1].lr.y - quadpoints[i-1].ul.y + 1,
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})
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end
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return pboxes
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end
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function PdfDocument:saveHighlight(pageno, item)
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local can_write = self:_checkIfWritable()
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if can_write ~= true then return can_write end
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self.is_edited = true
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local quadpoints, n = _quadpointsFromPboxes(item.pboxes)
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local page = self._document:openPage(pageno)
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local annot_type = C.PDF_ANNOT_HIGHLIGHT
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local annot_color = BlitBuffer.colorFromName(item.color)
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if item.drawer == "lighten" then
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annot_type = C.PDF_ANNOT_HIGHLIGHT
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elseif item.drawer == "underscore" then
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annot_type = C.PDF_ANNOT_UNDERLINE
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elseif item.drawer == "strikeout" then
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annot_type = C.PDF_ANNOT_STRIKE_OUT
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end
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-- NOTE: For highlights, display style may differ compared to ReaderView:drawHighlightRect...
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-- (e.g., we do a MUL blend, MuPDF currently appears to do an OVER blend).
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page:addMarkupAnnotation(quadpoints, n, annot_type, annot_color) -- may update/adjust quadpoints
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-- Update pboxes with the possibly adjusted coordinates (this will have it updated
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-- in self.view.highlight.saved[page])
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item.pboxes = _quadpointsToPboxes(quadpoints, n)
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page:close()
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self:resetTileCacheValidity()
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end
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function PdfDocument:deleteHighlight(pageno, item)
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local can_write = self:_checkIfWritable()
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if can_write ~= true then return can_write end
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self.is_edited = true
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local quadpoints, n = _quadpointsFromPboxes(item.pboxes)
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local page = self._document:openPage(pageno)
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local annot = page:getMarkupAnnotation(quadpoints, n)
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if annot ~= nil then
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page:deleteMarkupAnnotation(annot)
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self:resetTileCacheValidity()
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end
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page:close()
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end
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function PdfDocument:updateHighlightContents(pageno, item, contents)
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local can_write = self:_checkIfWritable()
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if can_write ~= true then return can_write end
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self.is_edited = true
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local quadpoints, n = _quadpointsFromPboxes(item.pboxes)
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local page = self._document:openPage(pageno)
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local annot = page:getMarkupAnnotation(quadpoints, n)
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if annot ~= nil then
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page:updateMarkupAnnotation(annot, contents)
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self:resetTileCacheValidity()
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end
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page:close()
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end
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function PdfDocument:writeDocument()
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logger.info("writing document to", self.file)
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self._document:writeDocument(self.file)
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end
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function PdfDocument:close()
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-- NOTE: We can't just rely on Document:close's return code for that, as we need self._document
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-- in :writeDocument, and it would have been destroyed.
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local DocumentRegistry = require("document/documentregistry")
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if DocumentRegistry:getReferenceCount(self.file) == 1 then
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-- We're the final reference to this Document instance.
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if self.is_edited then
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self:writeDocument()
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end
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end
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Document.close(self)
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end
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function PdfDocument:getLinkFromPosition(pageno, pos)
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return self.koptinterface:getLinkFromPosition(self, pageno, pos)
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end
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function PdfDocument:clipPagePNGFile(pos0, pos1, pboxes, drawer, filename)
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return self.koptinterface:clipPagePNGFile(self, pos0, pos1, pboxes, drawer, filename)
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end
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function PdfDocument:clipPagePNGString(pos0, pos1, pboxes, drawer)
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return self.koptinterface:clipPagePNGString(self, pos0, pos1, pboxes, drawer)
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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:getCoverPageImage()
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return self.koptinterface:getCoverPageImage(self)
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end
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function PdfDocument:findText(pattern, origin, reverse, case_insensitive, page)
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return self.koptinterface:findText(self, pattern, origin, reverse, case_insensitive, page)
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end
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function PdfDocument:findAllText(pattern, case_insensitive, nb_context_words, max_hits)
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return self.koptinterface:findAllText(self, pattern, case_insensitive, nb_context_words, max_hits)
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end
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function PdfDocument:renderPage(pageno, rect, zoom, rotation, gamma, hinting)
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return self.koptinterface:renderPage(self, pageno, rect, zoom, rotation, gamma, hinting)
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end
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function PdfDocument:hintPage(pageno, zoom, rotation, gamma)
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return self.koptinterface:hintPage(self, pageno, zoom, rotation, gamma)
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end
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function PdfDocument:drawPage(target, x, y, rect, pageno, zoom, rotation, gamma)
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return self.koptinterface:drawPage(self, target, x, y, rect, pageno, zoom, rotation, gamma)
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end
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function PdfDocument:register(registry)
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--- Document types ---
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registry:addProvider("cbt", "application/vnd.comicbook+tar", self, 100)
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registry:addProvider("cbz", "application/vnd.comicbook+zip", self, 100)
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registry:addProvider("cbz", "application/x-cbz", self, 100) -- Alternative mimetype for OPDS.
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registry:addProvider("cfb", "application/octet-stream", self, 80) -- Compound File Binary, a Microsoft general-purpose file with a file-system-like structure.
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registry:addProvider("docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document", self, 80)
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registry:addProvider("epub", "application/epub+zip", self, 50)
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registry:addProvider("epub3", "application/epub+zip", self, 50)
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registry:addProvider("fb2", "application/fb2", self, 80)
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registry:addProvider("htm", "text/html", self, 90)
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registry:addProvider("html", "text/html", self, 90)
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registry:addProvider("mobi", "application/x-mobipocket-ebook", self, 80)
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registry:addProvider("pdf", "application/pdf", self, 100)
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registry:addProvider("pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation", self, 80)
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registry:addProvider("tar", "application/x-tar", self, 10)
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registry:addProvider("txt", "text/plain", self, 80)
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registry:addProvider("xhtml", "application/xhtml+xml", self, 90)
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registry:addProvider("xml", "application/xml", self, 10)
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registry:addProvider("xps", "application/oxps", self, 100)
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registry:addProvider("xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", self, 80)
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registry:addProvider("zip", "application/zip", self, 20)
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--- Picture types ---
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registry:addProvider("gif", "image/gif", self, 90)
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-- MS HD Photo == JPEG XR
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registry:addProvider("hdp", "image/vnd.ms-photo", self, 90)
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registry:addProvider("j2k", "image/jp2", self, 90)
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registry:addProvider("jp2", "image/jp2", self, 90)
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registry:addProvider("jpeg", "image/jpeg", self, 90)
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registry:addProvider("jpg", "image/jpeg", self, 90)
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-- JPEG XR
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registry:addProvider("jxr", "image/jxr", self, 90)
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registry:addProvider("pam", "image/x-portable-arbitrarymap", self, 90)
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registry:addProvider("pbm", "image/x‑portable‑bitmap", self, 90)
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registry:addProvider("pgm", "image/x‑portable‑bitmap", self, 90)
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registry:addProvider("png", "image/png", self, 90)
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registry:addProvider("pnm", "image/x‑portable‑bitmap", self, 90)
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registry:addProvider("ppm", "image/x‑portable‑bitmap", self, 90)
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registry:addProvider("svg", "image/svg+xml", self, 80)
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registry:addProvider("tif", "image/tiff", self, 90)
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registry:addProvider("tiff", "image/tiff", self, 90)
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-- Windows Media Photo == JPEG XR
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registry:addProvider("wdp", "image/vnd.ms-photo", self, 90)
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end
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return PdfDocument
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