changes.txt

可以把HTML转化成PDF

CHANGES.txt - 10/23/2002
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CHANGES IN HTMLDOC v1.8.23

    NEW FEATURES

	- HTMLDOC now supports a full alpha channel in PNG
	  files.
	- HTMLDOC now reports an error when a table, image, or
	  section of text overflows into an adjacent table cell
	  or off the right edge of the page.

    CHANGES

	- The NEW SHEET page comment now breaks on N-up
	  boundaries when N is greater than 1.

    BUG FIXES

	- HTMLDOC tried to format tables with no rows or
	  columns. While the HTML in technically not in error,
	  it is not exactly something you'd expect someone to
	  do.
	- HTMLDOC didn't report an error when it could not
	  find the specified title page file.
	- HTMLDOC could crash if it was unable to create its
	  output files.
	- HTMLDOC could crash when writing HTML output
	  containing unknown HTML elements.
	- HTMLDOC could crash when writing HTML output if the
	  output document had no title.
	- The htmlGetText() function used a fixed-size (10k)
	  buffer which allowed for a buffer overflow.  The new
	  code (from HTMLDOC 1.9) allocates its buffer instead.
	- The header/footer text was not centered properly if
	  the header/footer font size was different than the
	  default body font size.
	- The GUI interface incorrectly localized URLs when
	  doing a "save as" operation.
	- The PNG background color was not correct for PNG files
	  using <= 8 bits per pixel.
	- The HTML parser didn't close the current list item if
	  an intermediate block element (P, PRE, etc.) was
	  inside the previous, unterminated list item.


CHANGES IN HTMLDOC v1.8.22

    NEW FEATURES

	- Now support many Windows code pages in addition to ISO
	  charsets.

    BUG FIXES

	- HTMLDOC could crash when checking if a URL is already
	  cached.
	- HTMLDOC didn't adjust the top margin when changing the
	  page header if the comment didn't appear at the top of
	  a page.
	- HTMLDOC didn't initialize the right number of TOC
	  headings.
	- When using a logo image in the header, the header was
	  placed too low on the page.


CHANGES IN HTMLDOC v1.8.21

    NEW FEATURES

	- HTMLDOC now supports heading levels 1 to 15.
	- HTMLDOC now allows the author to omit headings from
	  the TOC using the _HD_OMIT_TOC attribute.
	- HTMLDOC now supports remote book files when running
	  from the command-line.
	- HTMLDOC now supports hexadecimal character constants
	  (&#xFF)

    CHANGES

	- HTMLDOC now calculates the resolution of the body
	  image using the printable width instead of the page
	  width.
	- HTMLDOC should now compile out-of-the-box using the
	  Cygwin tools.
	- HTMLDOC no longer inserts whitespace between text
	  inside DIV elements.
	- HTMLDOC now supports quoted usernames and passwords in
	  URLs.
	- HTMLDOC now defaults unknown colors to white for
	  background colors and black for foreground colors. 
	  This should make documents that use non-standard color
	  names still appear readable.

    BUG FIXES

	- "make install" didn't work in the fonts directory.
	- "&euro;" didn't work, while "&#128;" did: the
	  character name table was not sorted properly...
	- Links didn't always point to the right page in PDF
	  output.
	- XRX comment output could crash HTMLDOC.
	- Fixed-width columns in tables could be resized by
	  HTMLDOC.
	- When writing PostScript commands, some printers reset
	  their duplexing state when a new setpagedevice command
	  is received; we now cache the current duplex state and
	  change it only as needed.
	- The MEDIA SIZE comment didn't adjust the printable
	  size for the current landscape setting.
	- HTMLDOC placed the header one line too high.
	- When continuing a chapter onto the next page, H3 and
	  higher headings would be indented the wrong amount.


CHANGES IN HTMLDOC v1.8.20

    NEW FEATURES

	- New --nup and NUMBER-UP options for PostScript and PDF
	  output.
	- HTMLDOC now logs HTML errors.
	- HTMLDOC now supports the A3, B, Legal, and Tabloid
	  size names.
	- HTMLDOC now supports embedding of the base Type1 fonts
	  in PostScript and PDF output.

    CHANGES

	- The HTML parser now allows BODY to auto-close HEAD and
	  visa-versa.

    BUG FIXES

	- HTMLDOC wouldn't compile using GCC under HP-UX due to
	  a badly "fixed" system header file (vmtypes.h).
	- Generating a book without a table-of-contents would
	  produce a bad PDF file.
	- The Xerox XRX comments used the wrong units for the
	  media size, points instead of millimeters.
	- IMG elements with links that use the ALIGN attribute
	  didn't get the links.
	- Header and footer comments would interfere with the
	  top and bottom margin settings.
	- Fixed a bug in the htmlReadFile() function which
	  caused user-provided title pages not to be displayed
	  in PS or PDF output.
	- The table-of-contents would inherit the last media
	  settings in the document, but use the initial settings
	  when formatting.


CHANGES IN HTMLDOC v1.8.19

    NEW FEATURES

	- Now support the "subject" meta variable.

    CHANGES

	- Updated the HTML parser to use HTML 4.0 rules for
	  embedding elements inside a LI.
	- Now check for a TYPE attribute on EMBED elements, so
	  that embedded Flash files do not get treated as HTML.
	- Now put the COPYRIGHT meta data in the Author field in
	  a PDF file along with the AUTHOR meta data (if any).
	- No longer embed the prolog.ps command header when
	  PostScript commands are not being embedded in the
	  output.
	- HTMLDOC now properly ignores the HTML 4.0 COL element.

    BUG FIXES

	- Squeezed tables were not centered or right-aligned
	  properly.
	- Cells didn't align properly if they were the first
	  things on the page, or if there were several
	  intervening empty cells.
	- The preferred cell width handling didn't account for
	  the minimum cell width, which could cause some tables
	  to become too large.
	- Remote URLs didn't always resolve properly (like the
	  images from the Google web page...)
	- The font width loading code didn't force the
	  non-breaking space to have the same width as a regular
	  space.
	- PRE text didn't adjust the line height for the tallest
	  fragment in the line.
	- HTMLDOC tried to seek backwards when reading HTML
	  from the standard input.
	- The media margin comments did not work properly when
	  the current media orientation was landscape.


CHANGES IN HTMLDOC v1.8.18

    NEW FEATURES

	- Added support for remote HTML title pages.

    CHANGES

	- Now accept all JPEG files, even if they don't start
	  with an APPn marker.
	- Now only start a new page for a chapter/filter if we
	  aren't already at the top of a page.

    BUG FIXES

	- ROWSPAN handling in tables has been updated to match
	  the MSIE behavior, where the current rowspan is
	  reduced by the minimum rowspan in the table; that is,
	  if you use "ROWSPAN=17" for all cells in a row,
	  HTMLDOC now treats this as if you did not use ROWSPAN
	  at all.  It is unclear if this is what the W3C
	  intends.
	- The "--webpage" option didn't force toc levels to 0,
	  which caused a bad page object reference to be
	  inserted in the PDF output file.
	- Background colors in nested tables didn't always get
	  drawn in the right order, resulting in the wrong
	  colors showing through.
	- The HEADER page comment didn't set the correct top
	  position in landscape orientation.


CHANGES IN HTMLDOC v1.8.17

    NEW FEATURES

	- Improved table-of-contents generation, with chapter
	  headings at the top of new TOC pages and page numbers
	  based on the header/footer string.
	- Added new "--no-localfiles" option to disable access
	  to local files for added security in web services.
	- Long lines in book files can not be broken up using
	  a trailing backslash.
	- Added a modern "skin" to the GUI interface.

    CHANGES

	- Made some changes in how COLSPAN and ROWSPAN are
	  handled to better match how Netscape and MSIE format
	  things.
	- HTMLDOC now handles .book files with CR, LF, or CR LF
	  line endings.
	- Changed the TOC numbering to use 32-bit integers
	  instead of 8-bit integers...
	- Now handle local links with quoted (%HH) characters.
	- The command-line interface no longer sets PDF output
	  mode when using --continuous or --webpage.
	- HTMLDOC now opens HTML output files in binary mode to
	  prevent extra CR's under Windows, and strips incoming
	  CR's from PRE text.
	- Now support inserting the current chapter and heading
	  in the table-of-contents headers and footers.
	  
    BUG FIXES

	- The table cell border and background were offset by
	  the cellpadding when they should only be offset by the
	  cellspacing.
	- The buffer used for periods that lead up to the page
	  number in the table-of-contents was not large enough
	  for a legal-size document in landscape format.
	- If a book only contained chapter headings, the PDF
	  bookmarks would be missing the last chapter heading.
	- Table cells that ended with a break would render
	  incorrectly.
	- Fixed the table pre-format sizing code to properly
	  account for borders, padding, etc.
	- Fixed the table squeezing code to honor minimum widths
	  and properly resize the remaining space.
	- The MEDIA SIZE page comment did not reset the printable
	  width and length of the page.
	- Tables that used COLSPAN did not honor WIDTH values in
	  non-spanned cells.


CHANGES IN HTMLDOC v1.8.16

    CHANGES

	- Now break before and after DIV groups to match most
	  browsers (the HTML spec is ambivalent about it...)

    BUG FIXES

	- HR elements didn't render properly.
	- Background images didn't render properly and could
	  lock up HTMLDOC.
	- The "HALF PAGE" comment would lock up HTMLDOC -
	  HTMLDOC would keep adding pages until it ran out of
	  memory.
	- SUP and SUB used a fixed (reduced) size instead of
	  using a smaller size from the current one.
	- Empty cells could cause unnecessary vertical alignment
	  on the same row.


CHANGES IN HTMLDOC v1.8.15

    NEW FEATURES

	- Now support media source, type, and color attributes
	  in PS output.
	- Now support per-page size, margins, headers, footers,
	  orientation, and duplexing.
	- Now support plain text for headers and footers, with $
	  variables to include page numbers and so forth.
	- New device control prolog file for printer-specific
	  option commands.
	- Now support a new continuous web page mode that
	  doesn't automatically insert a page break with each
	  HTML file or URL (--continuous).
	- Now draw border around inline images as needed.
	- Now support MacOS X (only command-line at present).
	- Now support the "page-break-before", "text-align",
	  "vertical-align" style attributes, but only for style
	  information in an element's STYLE attribute.

    CHANGES

	- Now load images into memory only as needed, and unload