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netsurf/Docs/Options

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Common NetSurf user options 4nd December 2014
--------------------------------------------------------------------------------
This document outlines the common configuration options supported by the
NetSurf core.
Overview
========
The users configurations are generally stored in a "Choices" file
and are loaded at browser startup. Most user interfaces provide a
way to configure these parameters in a manner consistant with the
toolkit in use.
The user choices are stored as a simple key:value list.
Each entry has a type, one of: boolean, integer, unsigned integer,
hexadecimal colour value or string.
General Options
===============
+----------------------+--------+-----------+----------------------------------+
| Option Key | Type | Default | Description |
+----------------------+--------+-----------+----------------------------------+
| http_proxy | bool | false | An HTTP proxy should be used. |
| | | | |
| http_proxy | bool | false | An HTTP proxy should be used. |
| | | | |
| http_proxy_host | string | NULL | Hostname of proxy. |
| | | | |
| http_proxy_port | int | 8080 | Proxy port. |
| | | | |
| http_proxy_auth | int | 0 | Proxy authentication method. |
| | | | |
| http_proxy_auth_user | string | NULL | Proxy authentication user name |
| | | | |
| http_proxy_auth_pass | string | NULL | Proxy authentication password |
| | | | |
| http_proxy_noproxy | string | localhost | Proxy omission list |
| | | | |
| font_size | int | 128 | Default font size / 0.1pt. |
| | | | |
| font_min_size | int | 85 | Minimum font size. |
| | | | |
| font_sans | string | NULL | Default sans serif font |
| | | | |
| font_serif | string | NULL | Default serif font |
| | | | |
| font_mono | string | NULL | Default monospace font
| | | | |
| font_cursive | string | NULL | Default cursive font
| | | | |
| font_fantasy | string | NULL | Default fantasy font
| | | | |
| accept_language | string | NULL | Accept-Language header.
| | | | |
| accept_charset | string | NULL | Accept-Charset header.
| | | | |
| memory_cache_size | int | 12MiB | Preferred maximum size of memory |
| | | | cache in bytes. |
| | | | |
| disc_cache_size | uint | 1GiB | Preferred expiry size of disc |
| | | | cache in bytes. |
| | | | |
| disc_cache_age | int | 28 | Preferred expiry age of disc |
| | | | cache in days. |
| | | | |
| block_advertisements | bool | false | Whether to block advertisements
| | | | |
| do_not_track | bool | false | Disable website tracking [1]
| | | | |
| minimum_gif_delay | int | 10 | Minimum GIF animation delay
| | | | |
| send_referer | bool | true | Whether to send the referer HTTP |
| | | | header. |
| | | | |
| foreground_images | bool | true | Whether to fetch foreground images
| | | | |
| background_images | bool | true | Whether to fetch background images
| | | | |
| animate_images | bool | true | Whether to animate images
| | | | |
| enable_javascript | bool | false | Whether to execute javascript
| | | | |
| script_timeout | int | 10 | Maximum time to wait for a script|
| | | | to run in seconds |
| | | | |
| expire_url | int | 28 | How many days to retain URL data |
| | | | for. |
| | | | |
| font_default | int | 0 | Default font family
| | | | |
| ca_bundle | string | NULL | ca-bundle location
| | | | |
| ca_path | string | NULL | ca-path location
| | | | |
| cookie_file | string | NULL | Cookie file location
| | | | |
| cookie_jar | string | NULL | Cookie jar location
| | | | |
| homepage_url | string | NULL | Home page location
| | | | |
| search_url_bar | bool | false | search web from url bar
| | | | |
| search_provider | int | 0 | default web search provider
| | | | |
| url_suggestion | bool | true | URL completion in url bar
| | | | |
| window_x | int | 0 | default x position of new windows
| | | | |
| window_y | int | 0 | default y position of new windows
| | | | |
| window_width | int | 0 | default width of new windows
| | | | |
| window_height | int | 0 | default height of new windows
| | | | |
| window_screen_width | int | 0 | width of screen when above |
| | | | options were saved |
| | | | |
| window_screen_height | int | 0 | height of screen when above |
| | | | options were saved |
| | | | |
| toolbar_status_size | int | 6667 | default size of status bar vs. |
| | | | h scroll bar |
| | | | |
| scale | int | 100 | default window scale
| | | | |
| incremental_reflow | bool | true | Whether to reflow web pages while|
| | | | objects are fetching |
| | | | |
| min_reflow_period | uint | 25 | Minimum time (in cs) between HTML|
| | | | reflows while objects are fetching
| | | | |
| core_select_menu | bool | false | Use core selection menu |
| | | | |
+----------------------+--------+-----------+----------------------------------+
[1] http://www.w3.org/Submission/2011/SUBM-web-tracking-protection-20110224/#dnt-uas
Fetcher options
===============
+--------------------------+------+------+-------------------------------------+
| Option Key | Type | Dflt | Description |
+--------------------------+------+------+-------------------------------------+
| max_fetchers | int | 24 | Maximum simultaneous active fetchers|
| | | | |
| max_fetchers_per_host | int | 5 | Maximum simultaneous active fetchers|
| | | | per host. (<=option_max_fetchers |
| | | | else it makes no sense) [2] |
| | | | |
| max_cached_fetch_handles | int | 6 | Maximum number of inactive fetchers |
| | | | cached. The total number of handles|
| | | | netsurf will therefore have open is|
| | | | this plus option_max_fetchers. |
| | | | |
| suppress_curl_debug | bool | true | Suppress debug output from cURL. |
| | | | |
| target_blank | bool | true | Whether to allow target="_blank" |
| | | | |
| button_2_tab | bool | true | Whether second mouse button opens in|
| | | | new tab. |
| | | | |
+--------------------------+------+------+-------------------------------------+
[2] Note that rfc2616 section 8.1.4 says that there should be no more
than two keepalive connections per host. None of the main browsers
follow this as it slows page fetches down considerably.
See https://bugzilla.mozilla.org/show_bug.cgi?id=423377#c4
PDF / Print options
===================
+------------------------+------+-------+--------------------------------------+
| Option Key | Type | Deflt | Description |
+------------------------+------+-------+--------------------------------------+
| margin_top | int | 10 | top margin of exported page |
| | | | |
| margin_bottom | int | 10 | bottom margin of exported page |
| | | | |
| margin_left | int | 10 | left margin of exported page |
| | | | |
| margin_right | int | 10 | right margin of exported page |
| | | | |
| export_scale | int | 70 | scale of exported content |
| | | | |
| suppress_images | bool | false | suppressing images in printed content|
| | | | |
| remove_backgrounds | bool | false | turning off all backgrounds for |
| | | | printed content |
| | | | |
| enable_loosening | bool | true | turning on content loosening for |
| | | | printed content |
| | | | |
| enable_PDF_compression | bool | true | compression of PDF documents |
| | | | |
| enable_PDF_password | bool | false | setting a password and encoding PDF |
| | | | documents |
+------------------------+------+-------+--------------------------------------+
System colours
==============
These are the css system colours which the browser also uses to style
generated output.
+--------------------------------+--------+------------+
| Option Key | Type | Default |
+--------------------------------+--------+------------+
| sys_colour_ActiveBorder | colour | 0x00d3d3d3 |
| sys_colour_ActiveCaption | colour | 0x00f1f1f1 |
| sys_colour_AppWorkspace | colour | 0x00f1f1f1 |
| sys_colour_Background | colour | 0x006e6e6e |
| sys_colour_ButtonFace | colour | 0x00f9f9f9 |
| sys_colour_ButtonHighlight | colour | 0x00ffffff |
| sys_colour_ButtonShadow | colour | 0x00aeaeae |
| sys_colour_ButtonText | colour | 0x004c4c4c |
| sys_colour_CaptionText | colour | 0x004c4c4c |
| sys_colour_GrayText | colour | 0x00505050 |
| sys_colour_Highlight | colour | 0x00c00800 |
| sys_colour_HighlightText | colour | 0x00ffffff |
| sys_colour_InactiveBorder | colour | 0x00f1f1f1 |
| sys_colour_InactiveCaption | colour | 0x00e6e6e6 |
| sys_colour_InactiveCaptionText | colour | 0x00a6a6a6 |
| sys_colour_InfoBackground | colour | 0x008fdfef |
| sys_colour_InfoText | colour | 0x00000000 |
| sys_colour_Menu | colour | 0x00f1f1f1 |
| sys_colour_MenuText | colour | 0x004e4e4e |
| sys_colour_Scrollbar | colour | 0x00cccccc |
| sys_colour_ThreeDDarkShadow | colour | 0x00aeaeae |
| sys_colour_ThreeDFace | colour | 0x00f9f9f9 |
| sys_colour_ThreeDHighlight | colour | 0x00ffffff |
| sys_colour_ThreeDLightShadow | colour | 0x00ffffff |
| sys_colour_ThreeDShadow | colour | 0x00d5d5d5 |
| sys_colour_Window | colour | 0x00f1f1f1 |
| sys_colour_WindowFrame | colour | 0x004e4e4e |
| sys_colour_WindowText | colour | 0x00000000 |
+--------------------------------+--------+------------+
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