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A lightweight HTML and CSS Parser in C

Home Page: https://www.msweet.org/htmlcss

License: Apache License 2.0

Makefile 0.63% C 66.84% HTML 30.90% CSS 1.53% Shell 0.09%

html css c ttf otf

htmlcss's Introduction

HTMLCSS - Lightweight HTML/CSS Library

HTMLCSS is a lightweight HTML/CSS parser written in C that allows applications to prepare a HTML document for rendering or conversion. HTMLCSS is extremely portable and only requires a C99 compiler like GCC, Clang, Visual C, etc. HTMLCSS is also extremely memory efficient, utilizing a shared string pool and smart CSS cache to minimize the size of a HTML document in memory.

I'm providing HTMLCSS as open source under the Apache License Version 2.0 with exceptions for use with GPL2/LGPL2 applications which allows you do pretty much do whatever you like with it. Please do provide feedback and report bugs to the Github project page so that everyone can benefit.

Features

Features include:

HTML 5 markup parser
CSS 3 stylesheet parser
OFC/OFF/TTC/TTF font file parser (metadata and metrics only)
GIF/JPG/PNG image file parser (metadata only)
Functions to calculate CSS properties for a given node in a HTML document
Functions to extract HTML "runs" consisting of CSS properties, content strings, and image references that can be rendered directly, including the :before and :after content from a stylesheet

HTMLCSS does not support dynamic HTML content created using Javascript in a HTML document, as such content is typically used for interactive web pages while HTMLCSS is intended for use with static content.

Requirements

You'll need a C99 compiler like GCC, Clang, or Visual C, along with a POSIX- compliant make program.

Building

Run make to build the library and unit test program.

Installing

Run make install to install the library and header files under /usr/local. To install in a different location, specify the "prefix" variable, e.g.:

make install prefix=/some/other/directory

Using

See the file DOCUMENTATION.md for documentation on using the library.

Legal Stuff

HTMLCSS is licensed under the Apache License Version 2.0 with an exception to allow linking against GPL2/LGPL2-only software. See the files "LICENSE" and "NOTICE" for more information.

htmlcss's People

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hoathienvu8x lxsoros moneytech linecode zousenming strogo myheyj szout tao-meng

htmlcss's Issues

SVG support

Add support for the W3C's SVG file format, in order to get dimension information for formatting.

OFC/OFF/TTC/TTF compliant font file parser

Need an ISO 14496-22 Open Font Format font parser to get character/glyph widths and font style information for formatting running.

win32 support?

Hello!

I just attempted a very basic compilation with cl *.c -Fetesthtmlcss.exe to see how far it would go. Turns out, very far.

The only files conflicting are:

> grep -r unistd .
./common-private.h:#    include <unistd.h>
./font-find.c:#include <unistd.h>
./sha3.c:#include <unistd.h>

common-private.h already does a win32 check. Do you think it would be possible to port the other candidates?

Thanks and kind regards,
Ingwie

when run with command line(./testhtmlcss --html test.html) and with Vulnerability detector tool ASAN
I could get the message:

==2423395==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 1280 byte(s) in 5 object(s) allocated from:
#0 0x7f2fb0cd2961 in realloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98961)
#1 0x40fc89 in hc_create_props /home/software/htmlcss/css-compute.c:2666
#2 0x40fc89 in hcNodeComputeCSSProperties /home/software/htmlcss/css-compute.c:1854

    Direct leak of 160 byte(s) in 5 object(s) allocated from:
#0 0x7f2fb0cd279a in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9879a)
#1 0x43b98a in hcDictNew /home/software/htmlcss/dict.c:161

    Direct leak of 160 byte(s) in 5 object(s) allocated from:
#0 0x7f2fb0cd279a in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9879a)
#1 0x43b121 in hcDictCopy /home/software/htmlcss/dict.c:59

    Indirect leak of 384 byte(s) in 5 object(s) allocated from:
#0 0x7f2fb0cd2961 in realloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98961)
#1 0x43bed4 in hcDictSetKeyValue /home/software/htmlcss/dict.c:237

    Indirect leak of 224 byte(s) in 5 object(s) allocated from:
#0 0x7f2fb0cd279a in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x9879a)
#1 0x43b26c in hcDictCopy /home/software/htmlcss/dict.c:66

    SUMMARY: AddressSanitizer: 2208 byte(s) leaked in 25 allocation(s).


you can click [this ](https://github.com/wanghualei2/crash_collect/blob/master/htmlcss/test.html)to get test.html

Support vertical fonts/layout, Unicode beyond plane 0

Currently the font metrics code only supports Unicode plane 0 and horizontal fonts. Should read the vmtx table, when present, and support computation of extends for vertical layout.

example of html+css rendering

Hello

is there a silple example of html+css rendering ?

thank you

Vincent Torri