bump base: crengine, freetype, libjpeg-turbo (#3928)

Includes:
- [build] FreeType: bump to 2.9.1
- [build] bump libjpeg-turbo to 1.5.3
- bump crengine:
 - Fix CSS selector specificity computation
 - [fix] crengine/src/lvfntman.cpp: improve letter_spacing limit
 - [fix] crengine/src/lvxml.cpp: add all empty HTML elements
 - html head styles: fix styles not being applied
 - Hyphenation: increase MAX_PATTERN_SIZE from 16 to 35
 - html documents: proper handling of <BR> tags
 - Allows requesting old (broken) XML/DOM building code
- cre.cpp: setStyleSheet(): accept filepath and/or css text,
  and added getIntProperty() and getStringProperty()

credocument/readerrolling: request older XML/DOM building code
for books previously opened, to not lose bookmarks and highlights

(unit tests update because of new handling of consecutive BR via css
pushed links down in the book)

frontend/apps/reader/modules/readerrolling.lua

@@ -108,6 +108,28 @@ function ReaderRolling:init()
 end
 
 function ReaderRolling:onReadSettings(config)
+    -- 20180503: some fix in crengine has changed the way the DOM is built
+    -- for HTML documents and may make XPATHs obtained from previous version
+    -- invalid.
+    -- We may request the previous (buggy) behaviour though, which we do
+    -- if we use a DocSetting previously made that may contain bookmarks
+    -- and highlights with old XPATHs.
+    -- (EPUB will use the same correct DOM code no matter what DOM version
+    -- we request here.)
+    if not config:readSetting("cre_dom_version") then
+        -- Not previously set, guess which DOM version to use
+        if config:readSetting("last_xpointer") then
+            -- We have a last_xpointer: this book was previously opened
+            -- with possibly a very old version: request the oldest
+            config:saveSetting("cre_dom_version", self.ui.document:getOldestDomVersion())
+        else
+            -- No previous xpointer: book never opened (or sidecar file
+            -- purged): we can use the latest DOM version
+            config:saveSetting("cre_dom_version", self.ui.document:getLatestDomVersion())
+        end
+    end
+    self.ui.document:requestDomVersion(config:readSetting("cre_dom_version"))
+
     local last_xp = config:readSetting("last_xpointer")
     local last_per = config:readSetting("last_percent")
     if last_xp then

frontend/document/credocument.lua

@@ -20,6 +20,7 @@ local CreDocument = Document:new{
 
     _document = false,
     _loaded = false,
+    _cre_dom_version = nil,
 
     line_space_percent = 100,
     default_font = G_reader_settings:readSetting("cre_font") or "Noto Serif",
@@ -120,6 +121,9 @@ function CreDocument:init()
         error(self._document)  -- will contain error message
     end
 
+    -- get DOM engine latest version
+    self._cre_dom_version = self._document:getIntProperty("crengine.dom.version")
+
     -- adjust font sizes according to screen dpi
     self._document:adjustFontSizes(Screen:getDPI())
 
@@ -137,6 +141,18 @@ function CreDocument:init()
     self.info.configurable = true
 end
 
+function CreDocument:getLatestDomVersion()
+    return self._cre_dom_version
+end
+
+function CreDocument:getOldestDomVersion()
+    return 20171225 -- arbitrary day in the past
+end
+
+function CreDocument:requestDomVersion(version)
+    self._document:setIntProperty("crengine.dom.version", version)
+end
+
 function CreDocument:loadDocument(full_document)
     if not self._loaded then
         local only_metadata = full_document == false

spec/unit/readerlink_spec.lua

@@ -16,9 +16,9 @@ describe("ReaderLink module", function()
         local readerui = ReaderUI:new{
             document = DocumentRegistry:openDocument(sample_epub),
         }
-        readerui.rolling:onGotoPage(4)
-        readerui.link:onTap(nil, {pos = {x = 336, y = 668}})
-        assert.is.same(36, readerui.rolling.current_page)
+        readerui.rolling:onGotoPage(6)
+        readerui.link:onTap(nil, {pos = {x = 336, y = 166}})
+        assert.is.same(40, readerui.rolling.current_page)
     end)
 
     it("should jump to links in pdf page mode", function()
@@ -53,11 +53,11 @@ describe("ReaderLink module", function()
         local readerui = ReaderUI:new{
             document = DocumentRegistry:openDocument(sample_epub),
         }
-        readerui.rolling:onGotoPage(4)
-        readerui.link:onTap(nil, {pos = {x = 336, y = 668}})
-        assert.is.same(36, readerui.rolling.current_page)
+        readerui.rolling:onGotoPage(6)
+        readerui.link:onTap(nil, {pos = {x = 336, y = 166}})
+        assert.is.same(40, readerui.rolling.current_page)
         readerui.link:onGoBackLink()
-        assert.is.same(4, readerui.rolling.current_page)
+        assert.is.same(6, readerui.rolling.current_page)
     end)
 
     it("should be able to go back after link jump in pdf page mode", function()