Editing Module:Adjacent stations/doc (section)

== Hierarchy and list of parameters ==
# The first layer of the table is data for the entire system, as well as output options.
# Under the system table is the list of lines.
# The third layer is data for a given line.
# Each line can have 'types'. This can be either types of services or branches of the line.
# The fifth layer is data for a given type.

If not specified, all keys and values are strings.

=== Main layer (1) ===
{| class="wikitable"
|+
!Parameter
!Type
!Used in {{Tl|Adjacent stations}}
!Description
|-
|<code>["lang"]</code>
|String
|{{Yes}}
|Values are <code>"en-US"</code> and <code>"en-GB"</code>. If not set, <code>"en-GB"</code> is assumed.
|-
|<code>["system title"]</code>
|String
|{{Yes}}
|Text in the middle cell of the header.
|-
|<code>["system icon"]</code>
|String
|{{Yes}}
|Image used in the middle cell of the {{tl|Adjacent stations}} header and by {{tl|Rail icon}}.
|-
|<code>["system icon format"]</code>
|String
|{{No}}
|Icon type, used by {{tl|Rail icon}}. If specified and not <code>"image"</code>, the value is passed to the function that implements {{tl|Rail color box}}.
|-
|<code>["system color"]</code>
|String
|{{No}}
|RGB hex triplet (three or six characters, like <code>"BE2D2C"</code> or <code>"039"</code>). Can be called by using only one parameter in {{tl|Rail color}}.
|-
|<code>["header stop noun"]</code>
|String
|{{Yes}}
|The noun after 'preceding' and 'following' in the left and right header cells. Default value is <code>"station"</code>.
|-
|<code>["name format"]</code>
|String
|{{No}}
|CSS for the header of {{tl|Infobox station}} and anything else using the <code>style</code> function with {{para|1|header}}. Values can be strings or nested tables, with the first level being for the line (whatever's in {{para|style2}} of {{tl|Infobox station}}). The second level is currently unused. The first entry in a nested table with no key (i.e. with key <code>1</code>) is the default.
|-
|<code>["header background color"]</code>
|String
|{{No}}
|RGB hex triplet for {{tl|Infobox station}} subheaders and anything else using the <code>style</code> function with {{para|1|subheader}}. By default, it is a light gray. Values can be strings or nested tables, like those for <code>"name format"</code>.
|-
|<code>["header text color"]</code>
|String
|{{No}}
|RGB hex triplet for {{tl|Infobox station}} subheaders and anything else using the <code>style</code> function with {{para|1|subheader}}. By default, it is calculated based on the header background color. Values can be strings or nested tables, like those for <code>["name format"]</code>.
|-
|<code>["station format"]</code>
|Table or string
|{{Yes}}
|Table containing station format strings. The first entry without a specified key (i.e. with the key being the number <code>1</code>) is the default, and all other entries must have keys corresponding to the input. Format strings without wikilink brackets are converted to links, with the input (usually the station name) used as the displayed text. Tables can be nested within this table to indicate options based on the line and line type passed to this template.

<code>%1</code>, <code>%2</code> and <code>%3</code> can be used in all strings regardless of the level of nesting to be replaced respectively by the station input, the line input (after alias replacement) and the type input (after alias replacement).
|-
|<code>["lines"]</code>
|Table
|{{Yes}}
|Data table containing line tables.
|-
|<code>["aliases"]</code>
|Table
|{{Yes}}
|Table containing aliases (as table keys) for lines (as values). All keys are lowercase, as the input is treated as case-insensitive by being lower-cased.
|}

=== Station format table (2) ===
{| class="wikitable"
|+
!Parameter
!Type
!Used in {{Tl|Adjacent stations}}
!Description
|-
|<code>[1]</code>
|String
|{{Yes}}
|Default format.
|-
|<code>["''non-default station name''"]</code>
|String or table
|{{Yes}}
|Format for a non-default station, or line-specific format table.
|}

=== Line-specific format table (3) ===
{| class="wikitable"
|+
!Parameter
!Type
!Used in {{Tl|Adjacent stations}}
!Description
|-
|<code>[1]</code>
|String
|{{Yes}}
|Default format.
|-
|<code>["''line name''"]</code>
|String or table
|{{Yes}}
|Format for a non-default station, or type-specific format table.
|}

=== Type-specific format table (4) ===
{| class="wikitable"
|+
!Parameter
!Type
!Used in {{Tl|Adjacent stations}}
!Description
|-
|<code>[1]</code>
|String
|{{Yes}}
|Default format.
|-
|<code>["''type name''"]</code>
|String
|{{Yes}}
|Format for a non-default station.
|}

=== Line table (3) ===
A virtual line named <code>["_default"]</code> can be added to set default values for all lines. Currently, this is available for three parameters.
{| class="wikitable"
!Parameter
!Type
!Used in {{Tl|Adjacent stations}}
!Description
|-
|<code>["title"]</code>
|String
|{{Yes}}
|The text displayed in the middle cell, typically a link to the line's article. If not specified, then the data in <code>["_default"]</code> is used (<code>%1</code> in the default value is replaced by the input after alias replacement).
|-
|<code>["short name"]</code>
|String
|{{No}}
|Abbreviated line name used by {{tl|Rail color box}}.
|-
|<code>["icon"]</code>
|String
|{{No}}
|Image used by {{tl|Rail icon}}. If not specified, then the data in <code>["_default"]</code> is used (<code>%1</code> in the default value is replaced by the input after alias replacement).
|-
|<code>["icon format"]</code>
|String
|{{No}}
|Icon type used by {{tl|Rail icon}}. If specified and not <code>"image"</code>, the value is passed to the function that implements {{tl|Rail color box}}.
|-
|<code>["color"]</code>
|String
|{{Yes}}
|RGB hex triplet. Lines fall back to the <code>["_default"]</code> colour (if any) or the system's colour if they themselves do not have one; types fall back to the line's colour (if any), to the <code>["_default"]</code> colour (if any) or to the system's colour. This colour is used in the second and fourth columns of {{tl|Adjacent stations}}, and by {{tl|Rail color box}} and {{tl|Rail icon}} as the emphasised colour. By default, if a type and its line both have a colour, then the line's colour will be treated as the background colour (see next section) for the line name in the middle cell. This can be turned off by setting the type's background colour to <code>""</code> or <code>"transparent"</code>.
|-
|<code>["background color"]</code> 
|String
|{{Yes}}
|RGB hex triplet (three or six characters). This colour is optional and is only displayed behind the line name in the middle cell. The module adds transparency so that all text displayed over the background is legible.
|-
|<code>["border color"]</code>
|String
|{{No}}
|RGB hex triplet used by {{tl|Rail color box}}.
|-
|<code>["text color"]</code>
|String
|{{No}}
|RGB hex triplet used by {{tl|Rail color box}}.
|-
|<code>["left terminus"]</code>
|String
|{{Yes}}
|The station which is usually the left terminus of the line. If there are multiple stations by default, the value should be a table containing numbered values (e.g. <code>["left terminus"] = {"Chesham", "Amersham"}</code>). The key <code>["via"]</code> in that table can be used to append 'via' and the value's station link.
|-
|<code>["right terminus"]</code>
|String
|{{Yes}}
|The station which is usually the right terminus of the line; behaves like <code>["left terminus"]</code>.
|-
|<code>["note-mid"]</code>
|String
|{{Yes}}
|Default small text below line and type names. Overridden by {{para|note-mid}} in transclusion.
|-
|<code>["circular"]</code>
|Boolean
|{{Yes}}
|If the value is <code>true</code> then the termini will display without 'toward'/'towards'. May be overridden by type.
|-
|<code>["oneway-left"]</code> 
|Boolean
|{{Yes}}
|If the value is <code>true</code> then 'One-way operation' will display instead of the left terminus. 
|-
|<code>["oneway-right"]</code>
|Boolean
|{{Yes}}
|Right counterpart of oneway-left.
|-
|<code>["types"]</code>
|Table
|{{Yes}}
|Table containing the line type tables.
|}

=== Type table (5) ===
{| class="wikitable"
!Parameter
!Type
!Used in {{Tl|Adjacent stations}}
!Description
|-
|<code>["title"]</code>
|String
|{{Yes}}
|The name of the line type. In {{tl|Adjacent stations}}, this is displayed as normal-sized text below the line name in the middle cell; in {{tl|Rail color box}}, for some options this is displayed after the line name, separated from it by a spaced [[en dash]] (this is also used for the nonstop text). To avoid displaying a type name, set this to <code>""</code>.
|-
|<code>["short name"]</code>
|String
|{{No}}
|Abbreviated line name used by {{tl|Rail color box}}.
|-
|<code>["icon"]</code>
|String
|{{No}}
|Image used by {{tl|Rail icon}}.
|-
|<code>["icon format"]</code>
|String
|{{No}}
|Icon type used by {{tl|Rail icon}}. If specified and not <code>"image"</code>, the value is passed to the function that implements {{tl|Rail color box}}.
|-
|<code>["color"]</code>
|String
|{{Yes}}
|RGB hex triplet. Lines fall back to the <code>["_default"]</code> colour (if any) or the system's colour if they themselves do not have one; types fall back to the line's colour (if any), to the <code>["_default"]</code> colour (if any) or to the system's colour. This colour is used in the second and fourth columns of {{tl|Adjacent stations}}, and by {{tl|Rail color box}} and {{tl|Rail icon}} as the emphasised colour. By default, if a type and its line both have a colour, then the line's colour will be treated as the background colour (see next section) for the line name in the middle cell. This can be turned off by setting the type's background colour to <code>""</code> or <code>"transparent"</code>.
|-
|<code>["background color"]</code> 
|String
|{{Yes}}
|RGB hex triplet (three or six characters). This colour is optional and is only displayed behind the line name in the middle cell. The module adds transparency so that all text displayed over the background is legible.
|-
|<code>["border color"]</code>
|String
|{{No}}
|RGB hex triplet used by {{tl|Rail color box}}.
|-
|<code>["text color"]</code>
|String
|{{No}}
|RGB hex triplet used by {{tl|Rail color box}}.
|-
|<code>["left terminus"]</code>
|String
|{{Yes}}
|The station which is usually the left terminus of the line. Overrides line terminus. If there are multiple stations by default, the value should be a table containing numbered values (e.g. <code>["left terminus"] = {"Chesham", "Amersham"}</code>). The key <code>["via"]</code> in that table can be used to append 'via' and the value's station link.
|-
|<code>["right terminus"]</code>
|String
|{{Yes}}
|The station which is usually the right terminus of the line; behaves like <code>["left terminus"]</code>.
|-
|<code>["note-mid"]</code>
|String
|{{Yes}}
|Default small text below line and type names. Overridden by {{para|note-mid}} in transclusion.
|-
|<code>["circular"]</code>
|Boolean
|{{Yes}}
|If the value is <code>true</code> then the termini will display without 'toward'/'towards'.
<!-- Types currently do not have these parameters. However, it could make sense to add them if the need arises.
|-
|<code>["oneway-left"]</code> 
|Boolean
|{{Yes}}
|If the value is <code>true</code> then 'One-way operation' will display instead of the left terminus. 
|-
|<code>["oneway-right"]</code>
|Boolean
|{{Yes}}
|Right counterpart of oneway-left.
-->
|}