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* doc/theme-format.txt: described new theme format.
* src/themes/Bright, src/themes/Crux: added version 2 themes.
331 lines
13 KiB
Plaintext
331 lines
13 KiB
Plaintext
Themes are in a simple XML-subset format. There are multiple versions
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of the theme format, and a given theme can support more than one format.
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Version 1: THEMEDIR/metacity-1/metacity-theme-1.xml
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(original metacity format)
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Version 2: THEMEDIR/metacity-1/metacity-theme-2.xml
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The subdirectory name is "metacity-1" in all versions.
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As you might expect, older versions of metacity will not understand
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newer theme formats. However, newer versions will use old themes.
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Metacity will always use the newest theme format it understands that
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the X server supports. Some format versions are only supported if you
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have the right X server features.
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Each format *requires* the corresponding filename. If you put version
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2 format features in the metacity-1/metacity-theme-1.xml file, then
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metacity will get angry.
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This document has separate sections for each format version. You may
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want to read the document in reverse order, since the base features
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are discussed under version 1.
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New Features in Theme Format Version 2
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======================================
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The optional attributes rounded_top_left, rounded_top_right,
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rounded_bottom_left and rounded_bottom_right on <frame_geometry>
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should now be the radius of the corner in pixels. You may still use
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the values "false" for 0 and "true" for 5, which means v1 values will
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still work just fine.
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<frame_geometry> has a new optional attribute, hide_buttons. If this
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is true, no buttons will be displayed on the titlebar.
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Anywhere you can use a positive integer, you can use an integer constant.
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As well as constant integers and reals, you may define constant colours,
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thus:
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<constant name="RevoltingPink" value="#FF00FF"/>
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<constant name="Background" value="gtk:bg[NORMAL]"/>
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<frame_style> has two new optional attributes, background and alpha.
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If you specify alpha, you must specify background. background is a
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colour used for the background of the frame. alpha is the transparency
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as a real between 0.0 and 1.0. If the current X server does not support
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alpha channels, the value is ignored.
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The filename attribute of <image> may begin with "theme:". If so, the
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rest of the string is the name of a theme icon. The 64x64 version of the
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icon is used, except for fallback mini_icons, which use the 16x16 version.
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This does not affect ordinary resizing. For example:
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<button function="close" state="normal">
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<draw_ops>
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<include name="active_button"/>
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<image filename="theme:gnome-logout" x="2" y="2"
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width="width-4" height="height-4"/>
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<!-- Note: not "theme:gnome-logout.png" or similar. -->
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</draw_ops>
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</button>
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<menu_icon>s are parsed but ignored.
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Fallback icons can be specified using <fallback>. There are two
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optional arguments, icon and mini_icon. The values of these arguments
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are identical to that of the filename attribute of <image>. Fallback
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icons are used when a window does not supply its own icon. If a fallback
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icon is not specified with <fallback>, Metacity will use a built-in
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icon, as in metacity-theme-1.
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The <arc> element, as well as the original start_angle and end_angle
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attributes, may be given from and to attributes. The values of these
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attributes are given in degrees clockwise, with 0 being straight up.
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For example:
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<arc from="0.0" to="90.0" filled="true" color="#FF00FF"
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x="0" y="5" width="15" height="15"/>
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<frame state="shaded"> may now take an optional resize attribute, with
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the same interpretation as the resize attribute on <frame state="normal">.
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If this attribute is omitted for state="shaded", it defaults to "both".
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(If it is omitted for state="normal", it remains an error.)
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In addition to the four <button> functions which are required in
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metacity-theme-1, there are six new functions in metacity-theme-2:
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shade, unshade, above, unabove, stick and unstick.
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Overview of Theme Format Version 1
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==================================
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<?xml version="1.0"?>
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<metacity_theme>
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<!-- Only one info section is allowed -->
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<info>
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<name>Foo</name>
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<author>Foo P. Bar</author>
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<copyright>whoever, 2002</copyright>
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<date>Jan 31 2005</date>
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<description>A sentence about the theme.</description>
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</info>
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<!-- define a frame geometry to be referenced later -->
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<!-- frame_geometry has an optional has_title attribute which
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determines whether the title text height is included in the
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height calculation. if not specified, defaults to true.
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It also has an optional text_size="medium" attribute
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(same sizes as with Pango markup, xx-small thru medium thru
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xx-large)
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Finally it has optional args rounded_top_left=true,
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rounded_top_right=true, rounded_bottom_left=true,
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rounded_bottom_right=true.
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-->
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<frame_geometry name="normal" has_title="true" title_scale="medium">
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<distance name="left_width" value="6"/>
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<distance name="right_width" value="6"/>
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<distance name="bottom_height" value="7"/>
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<distance name="left_titlebar_edge" value="6"/>
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<distance name="right_titlebar_edge" value="6"/>
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<distance name="button_width" value="17"/>
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<distance name="button_height" value="17"/>
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<!-- alternative to button_width button_height distances -->
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<aspect_ratio name="button" value="1.0"/>
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<distance name="title_vertical_pad" value="4"/>
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<border name="title_border" left="3" right="12" top="4" bottom="3"/>
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<border name="button_border" left="0" right="0" top="1" bottom="1"/>
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</frame_geometry>
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<!-- inheritance is allowed; simply overwrites values from parent -->
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<frame_geometry name="borderless" parent="normal">
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<distance name="left_width" value="0"/>
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<distance name="right_width" value="0"/>
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<distance name="bottom_height" value="0"/>
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<distance name="left_titlebar_edge" value="0"/>
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<distance name="right_titlebar_edge" value="0"/>
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</frame_geometry>
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<!-- define a constant to use in positions/sizes of draw operations;
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constant names must start with a capital letter.
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-->
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<constant name="LineOffset" value="3"/>
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<!-- define drawing operations to be referenced later;
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these draw-op lists can also be placed inline.
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Positions/lengths are given as expressions.
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Operators are: +,-,*,/,%,`max`,`min`
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All operators are infix including `max` and `min`,
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i.e. "2 `max` 5"
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Some variables are predefined, and constants can also
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be used. Variables are:
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width - width of target area
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height - height of target area
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object_width - natural width of object being drawn
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object_height - natural height of object being drawn
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left_width - distance from left of frame to client window
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right_width - distance from right of frame to client window
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top_height - distance from top of frame to client window
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bottom_height - distance from bottom of frame to client window
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mini_icon_width - width of mini icon for window
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mini_icon_height - height of mini icon
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icon_width - width of large icon
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icon_height - height of large icon
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title_width - width of title text
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title_height - height of title text
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All these are always defined, except object_width/object_height
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which only exists for <image> right now.
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-->
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<draw_ops name="demo_all_ops">
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<line color="#00FF00" x1="LineOffset" y1="0" x2="0" y2="height"/>
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<line color="gtk:fg[NORMAL]"
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x1="width - 1" y1="0" x2="width - 1" y2="height"
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width="3" dash_on_length="2" dash_off_length="3"/>
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<rectangle color="blend/gtk:fg[NORMAL]/gtk:bg[NORMAL]/0.7"
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x="0" y="0" width="width - 1" height="height - 1" filled="true"/>
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<arc color="dark gray" x="0" y="0" width="width - 1" height="height - 1"
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filled="false" start_angle="30" extent_angle="180"/>
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<tint color="orange" alpha="0.5" x="0" y="0" width="width" height="height"/>
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<!-- may be vertical, horizontal, diagonal -->
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<gradient type="diagonal"
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x="10" y="30" width="width / 3" height="height / 4">
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<!-- any number of colors allowed here. A color can be
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a color name like "blue" (look at gcolorsel), a hex color
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as in HTML (#FFBB99), or a color from the gtk theme
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given as "gtk:base[NORMAL]", "gtk:fg[ACTIVE]", etc.
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-->
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<color value="gtk:fg[SELECTED]"/>
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<!-- color obtained by a 0.5 alpha composite of the second color onto the first -->
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<color value="blend/gtk:bg[SELECTED]/gtk:fg[SELECTED]/0.5"/>
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</gradient>
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<!-- image has an optional colorize="#color" attribute to give the
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image a certain color -->
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<image filename="foo.png" alpha="0.7"
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x="10" y="30" width="width / 3" height="height / 4"/>
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<gtk_arrow state="normal" shadow="in" arrow="up"
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filled="true"
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x="2" y="2" width="width - 4" height="height - 4"/>
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<gtk_box state="normal" shadow="out"
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x="2" y="2" width="width - 4" height="height - 4"/>
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<gtk_vline state="normal" x="2" y1="0" y2="height"/>
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<!-- window's icon -->
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<icon alpha="0.7"
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x="10" y="30" width="width / 3" height="height / 4"/>
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<!-- window's title -->
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<title color="gtk:text[NORMAL]" x="20" y="30"/>
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<!-- include another draw ops list; has optional x/y/width/height attrs -->
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<include name="some_other_draw_ops"/>
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<!-- tile another draw ops list; has optional
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x/y/width/height/tile_xoffset/tile_yoffset -->
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<tile name="some_other_draw_ops" tile_width="10" tile_height="10"/>
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</draw_ops>
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<frame_style name="normal" geometry="normal">
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<!-- How to draw each piece of the frame.
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For each piece, a draw_ops can be given inline or referenced
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by name. If a piece is omitted, then nothing will be drawn
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for that piece.
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For each piece, the "width" and "height" variables in
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coordinate expressions refers to the dimensions of the piece,
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the origin is at the top left of the piece.
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So <rectangle x="0" y="0" width="width-1" height="height-1"/>
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will outline a piece.
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-->
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<piece position="entire_background" draw_ops="demo_all_ops"/>
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<piece position="left_titlebar_edge">
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<draw_ops>
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<line color="#00FF00" x1="0" y1="0" x2="0" y2="height"/>
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</draw_ops>
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</piece>
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<!-- The complete list of frame pieces:
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entire_background: whole frame
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titlebar: entire area above the app's window
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titlebar_middle: area of titlebar_background not considered
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part of an edge
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left_titlebar_edge: left side of titlebar background
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right_titlebar_edge: right side of titlebar background
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top_titlebar_edge: top side of titlebar background
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bottom_titlebar_edge: bottom side of titlebar background
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title: the title area (doesn't include buttons)
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left_edge: left edge of the frame
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right_edge: right edge of the frame
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bottom_edge: bottom edge of the frame
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overlay: same area as entire_background, but drawn after
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drawing all sub-pieces instead of before
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-->
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<!-- For buttons, drawing methods have to be provided for
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each of three states:
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normal, pressed, prelight
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and the button function or position must be provided:
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close, maximize, minimize, menu,
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left_left_background, left_middle_background,
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left_right_background, right_left_background,
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right_middle_background, right_right_background
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So a working theme needs 3*4 = 12 button declarations
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and a theme may have up to 3*10 = 30 button declarations
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in order to handle button-rearrangement preferences.
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(The name "function" for the attribute is from before the
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background values existed.)
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-->
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<button function="close" state="normal" draw_ops="previously_named"/>
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<button function="menu" state="normal">
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<draw_ops>
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<icon alpha="0.7"
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x="0" y="0" width="object_width" height="object_height"/>
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</draw_ops>
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</button>
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</frame_style>
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<!-- styles can inherit from each other with the parent="" attribute.
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In a subclass anything can be re-specified to override
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the parent style. -->
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<frame_style name="focused" parent="normal">
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<piece position="title">
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<draw_ops>
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<rectangle color="gtk:bg[SELECTED]"
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x="0" y="0" width="width-1" height="height-1"/>
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<title color="gtk:fg[SELECTED]" x="(width - title_width) / 2"
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y="(height - title_height) / 2"/>
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</draw_ops>
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</piece>
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</frame_style>
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<!-- Maps styles to states of frame.
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Focus: yes (focused), no (not focused)
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Window states: normal, maximized, shaded, maximized_and_shaded
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Window resizability: none, vertical, horizontal, both
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Everything unspecified just does the same as
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unfocused/normal/both.
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only state="normal" needs a resize="" attribute.
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-->
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<frame_style_set name="normal">
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<frame focus="yes" state="normal" resize="both" style="focused"/>
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<frame focus="no" state="normal" resize="both" style="normal"/>
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</frame_style_set>
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<!-- Each window type needs a style set
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Types: normal, dialog, modal_dialog, menu, utility, border
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-->
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<window type="normal" style_set="normal"/>
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<!-- For menu icons, drawing methods are needed for the same
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four types as the buttons, and GTK states
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(insensitive,prelight,normal,etc.)
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-->
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<menu_icon function="close" state="normal" draw_ops="previously_named"/>
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</metacity_theme>
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