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LaTeX: support elliptical corners in rounded boxes
This commit is contained in:
Jean-François B
parent
f78d86554c
commit
de60cd8618
@ -1178,12 +1178,15 @@ inserted via the :dudir:`raw` directive) and the CSS syntax is only imitated.
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* A colon in place of the equal sign will break LaTeX.
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* As a rule, avoid inserting unneeded spaces in the key values.
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* ``...border-width`` or ``...padding`` expect a *single* dimension: they can not
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be used so far with space separated dimensions.
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* Dimensional parameters such as ``border-width`` or ``padding`` expect a
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*unique* dimension: they can not be used so far with space separated
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dimensions. The sole property which handles space separated input is
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``box-shadow``.
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* ``...top-right-radius`` et al. values may be either a single or *two* space
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separated dimensions.
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.. versionchanged:: 6.2.0
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Formerly only circular corners were supported.
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* Dimension specifications must use TeX units such as ``pt`` or ``cm`` or
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``in``. The ``px`` unit is recognized by ``pdflatex`` and ``lualatex``
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@ -1196,6 +1199,12 @@ inserted via the :dudir:`raw` directive) and the CSS syntax is only imitated.
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double the backslash or to employ a raw Python string for the value of
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the :ref:`'sphinxsetup' <latexsphinxsetup>` key.
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* As a rule, avoid inserting unneeded spaces in the key values: especially
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for the radii an input such ``2 pt 3pt`` will break LaTeX. Beware also
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that ``\fboxsep \fboxsep`` will not be seen as space separated in LaTeX.
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You must use something such as ``{\fboxsep} \fboxsep``. Or use
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directly ``3pt 3pt`` which is a priori equivalent and simpler.
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The options are all named in a similar pattern which depends on a ``prefix``,
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which is then followed by an underscore, then the property name.
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@ -1219,15 +1228,16 @@ forget the underscore separating the prefix from the property names.
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| ``<prefix>_border-left-width``,
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| ``<prefix>_border-width``. The latter can (currently) be only a *single*
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dimension which then sets all four others.
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The default is that all those dimensions are equal. They are set to:
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* ``\fboxrule`` (i.e. a priori ``0.4pt``) for :rst:dir:`code-block`,
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* ``\fboxrule`` for :dudir:`topic` or contents_ directive,
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* ``1pt`` for :dudir:`warning` and other "strong" admonitions,
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* ``0.5pt`` for :dudir:`note` and other "light" admonitions. The framing
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style of the "lighbox" used for them in absence of usage of CSS-named
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options will be emulated by the richer "heavybox" if setting
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``border-left-width`` and ``border-right-width`` both to ``0pt``.
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The default is that all those dimensions are equal. They are set to:
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* ``\fboxrule`` (i.e. a priori ``0.4pt``) for :rst:dir:`code-block`,
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* ``\fboxrule`` for :dudir:`topic` or contents_ directive,
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* ``1pt`` for :dudir:`warning` and other "strong" admonitions,
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* ``0.5pt`` for :dudir:`note` and other "light" admonitions. The framing
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style of the "lighbox" used for them in absence of usage of CSS-named
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options will be emulated by the richer "heavybox" if setting
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``border-left-width`` and ``border-right-width`` both to ``0pt``.
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- ``<prefix>_box-decoration-break`` can be set to either ``clone`` or
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``slice`` and configures the behavior at page breaks.
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@ -1239,20 +1249,21 @@ forget the underscore separating the prefix from the property names.
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| ``<prefix>_padding-left``,
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| ``<prefix>_padding``. The latter can (currently) be only a *single*
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dimension which then sets all four others.
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The default is that all those dimensions are equal. They are set to:
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* ``\fboxsep`` (i.e. a priori ``3pt``) for :rst:dir:`code-block`,
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* ``5pt`` for :dudir:`topic` or contents_ directive,
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* a special value for :dudir:`warning` and other "strong" admonitions,
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which ensures a backward compatible behavior.
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The default is that all those dimensions are equal. They are set to:
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.. important:: Prior to 5.1.0 there was no separate customizability of
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padding for warning-type boxes in PDF via LaTeX output. The sum of
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padding and border-width (as set for example for :dudir:`warning` by
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``warningborder``, now also named ``div.warning_border-width``) was
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kept to a certain constant value. This limited the border-width
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to small values else the border could overlap the text contents.
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This behavior is kept as default.
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* ``\fboxsep`` (i.e. a priori ``3pt``) for :rst:dir:`code-block`,
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* ``5pt`` for :dudir:`topic` or contents_ directive,
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* a special value for :dudir:`warning` and other "strong" admonitions,
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which ensures a backward compatible behavior.
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.. important:: Prior to 5.1.0 there was no separate customizability of
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padding for warning-type boxes in PDF via LaTeX output. The sum of
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padding and border-width (as set for example for :dudir:`warning` by
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``warningborder``, now also named ``div.warning_border-width``) was
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kept to a certain constant value. This limited the border-width
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to small values else the border could overlap the text contents.
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This behavior is kept as default.
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* the same padding behavior is obeyed per default for :dudir:`note` or
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other "light" admonitions when using ``sphinxheavybox``.
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@ -1260,13 +1271,17 @@ forget the underscore separating the prefix from the property names.
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| ``<prefix>_border-top-right-radius``,
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| ``<prefix>_border-bottom-right-radius``,
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| ``<prefix>_border-bottom-left-radius``,
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| ``<prefix>_border-radius``. The latter can (currently) be only a *single*
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dimension which then sets all four others (rounded corners are
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circular arcs only, no ellipses).
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The default is that all those dimensions are equal. They are set to:
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| ``<prefix>_border-radius``. Each can be either a single, or *two*,
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space separated, dimensions. The last one sets the first four to be
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identical to itself.
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* ``\fboxsep`` (i.e. a priori ``3pt``) for :rst:dir:`code-block` (since 6.0.0).
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* ``0pt`` for all other directives; this means to use straight corners.
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The default is that all four corners are either circular or straight,
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with common radii:
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* ``\fboxsep`` (i.e. a priori ``3pt``) for :rst:dir:`code-block` (since 6.0.0).
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* ``0pt`` for all other directives; this means to use straight corners.
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See a remark above about traps with spaces in LaTeX.
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- ``<prefix>_box-shadow`` is special in so far as it may be:
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* the ``none`` keyword,
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@ -1316,10 +1331,9 @@ forget the underscore separating the prefix from the property names.
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``clone`` for all other directives, but this will probably change at
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7.0.0.
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- Prior to 6.2.0, rounded corners forced a constant border width: the
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separate settings were ignored in favor of the sole
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``<prefix>_border-width``. Now (up to) 4 distinct radii happily cohabit
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with (up to) 4 distinct border widths.
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- Prior to 6.2.0, and since 5.1.0, the situation was that only circular
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rounded corners were supported and that a rounded corner forced the whole
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frame to use ``<prefix>_border-width`` for all four sides.
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- Inset shadows are incompatible with rounded corners. In case
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both are specified the inset shadow will simply be ignored.
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@ -1624,7 +1638,7 @@ satisfactory.
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Refer to :ref:`additionalcss` for important syntax information regarding the
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other keys. The default
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configuration uses no shadow, a border-width of ``\fboxrule``, a padding of
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``\fboxsep``, rounded corners (with radius ``\fboxsep``) and background and
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``\fboxsep``, circular corners with radii ``\fboxsep`` and background and
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border colors as for the default rendering of code-blocks.
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When a ``\sphinxbox`` usage is nested within another one, it will ignore the
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@ -9,6 +9,16 @@
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% Or we could use extra package "picture". We opt for custom wrappers
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% \spx@moveto, \spx@lineto, ..., working with old versions.
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%
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% - ellipse. This package extends pict2e with elliptical arcs. Its author
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% Daan Leijen also has contributed package longfbox which is part of
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% TeXLive. Had I known about it, I would perhaps have based Sphinx CSS on
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% top of longfbox at least partly. But this would not have spared me all
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% the work in sphinx.sty, which was a long walk until 6.2.0 version.
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% Besides I don't need the breakable boxes from longfbox, as Sphinx has
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% its own rather advanced layer on top of framed. I would need to check if
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% some thorny color issues solved by Sphinx (and not by tcolorbox) at page
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% breaks are solved by longfbox as well. (I have not tested)
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% At 6.2.0 refactoring, we do not wait for at begin document to try to load
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% pict2e. Actually since 6.0.0 the default is for code-blocks to use
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% rounded boxes, and the only reason since then to wait "at begin document"
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@ -42,6 +52,28 @@
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options setting radii have all been ignored}}%
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}%
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\IfFileExists{ellipse.sty}
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{\RequirePackage{ellipse}}
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{\PackageWarningNoLine{sphinx}{%
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The package ellipse is required for elliptical corners.\MessageBreak
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It does not seem to be available on your system.\MessageBreak
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All non-straight corners will use circle arcs.%
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}%
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\AtEndDocument{\PackageWarningNoLine{sphinx}{%
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The package ellipse is required for elliptical corners.\MessageBreak
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As it does not seem to be available on your system,\MessageBreak
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all non-straight corners have used circle arcs.}}%
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}%
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% Surprisingly it seems ellipse.sty uses a \@tempdimd which does not exist in
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% LaTeX. Was it removed at some point? Perhaps ellipse.sty was always tested
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% with some other package? I don't see it being defined in packages longfbox,
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% longbox, or options either. Or pict2e stopped defining it at some point? I
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% was very surprised that my first very test after completing the coding would
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% fail with an error about \@tempdimd, but simply defining it, everything
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% does seem to work fine! Not thoroughly tested, though.
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\@ifpackageloaded{ellipse}{\ifdefined\@tempdimd\else\newdimen\@tempdimd\fi}{}
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% Provides box registers \spx@tempboxa, \spx@tempboxb usable in other places
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\newbox\spx@tempboxa
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\newbox\spx@tempboxb
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@ -71,10 +103,14 @@
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\newdimen\spx@boxes@shadow@xoffset
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\newdimen\spx@boxes@shadow@yoffset
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%
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\newdimen\spx@boxes@radius@topleft % only circular arcs, x-radius same as y-radius
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\newdimen\spx@boxes@radius@topright
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\newdimen\spx@boxes@radius@bottomright
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\newdimen\spx@boxes@radius@bottomleft
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\newdimen\spx@boxes@radius@topleft@x
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\newdimen\spx@boxes@radius@topright@x
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\newdimen\spx@boxes@radius@bottomright@x
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\newdimen\spx@boxes@radius@bottomleft@x
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\newdimen\spx@boxes@radius@topleft@y
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\newdimen\spx@boxes@radius@topright@y
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\newdimen\spx@boxes@radius@bottomright@y
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\newdimen\spx@boxes@radius@bottomleft@y
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%
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% These colors will be set to colors defined appropriately by caller of
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% \spx@boxes@fcolorbox@setup macro
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@ -95,6 +131,22 @@
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%
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% The #1 is one of: pre, topic, warning, danger, etc....
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%
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% We delay until here the parsing of radii options to extract x and y
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% components.
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\def\spx@boxes@setradii#1 #2 #3\@nnil#4#5{%
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#4\dimexpr#1\relax
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#5\dimexpr#2\relax
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\ifdim#5=-\maxdimen#5#4\fi
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% if one of them is zero or negative set both to zero
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\ifdim#4>\z@\else#4\z@#5\z@\fi
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\ifdim#5>\z@\else#4\z@#5\z@\fi
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}%
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% if ellipse.sty is not available ignore the second component of all radii
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% specifications, use circle arcs with radius the x component
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\@ifpackageloaded{ellipse}
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{}
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{\def\spx@boxes@setradii#1 #2 #3\@nnil#4#5{#4\dimexpr#1\relax #5#4}}
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% Using \dimexpr for maximal user input flexibility.
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\def\spx@boxes@fcolorbox@setup#1{%
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\spx@boxes@border@top \dimexpr\@nameuse{spx@#1@border@top}\relax
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@ -108,10 +160,34 @@
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\spx@boxes@padding@bottom\dimexpr\@nameuse{spx@#1@padding@bottom}\relax
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\spx@boxes@padding@left \dimexpr\@nameuse{spx@#1@padding@left}\relax
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%
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\spx@boxes@radius@topleft \dimexpr\@nameuse{spx@#1@radius@topleft}\relax
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\spx@boxes@radius@topright \dimexpr\@nameuse{spx@#1@radius@topright}\relax
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\spx@boxes@radius@bottomright \dimexpr\@nameuse{spx@#1@radius@bottomright}\relax
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\spx@boxes@radius@bottomleft \dimexpr\@nameuse{spx@#1@radius@bottomleft}\relax
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\edef\spx@temp{\csname spx@#1@radius@topleft\endcsname\space}%
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\expandafter
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\spx@boxes@setradii
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\spx@temp
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{-\maxdimen}
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\@nnil
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\spx@boxes@radius@topleft@x\spx@boxes@radius@topleft@y
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\edef\spx@temp{\csname spx@#1@radius@topright\endcsname\space}%
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\expandafter
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\spx@boxes@setradii
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\spx@temp
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{-\maxdimen}
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\@nnil
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\spx@boxes@radius@topright@x\spx@boxes@radius@topright@y
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\edef\spx@temp{\csname spx@#1@radius@bottomright\endcsname\space}%
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\expandafter
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\spx@boxes@setradii
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\spx@temp
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{-\maxdimen}
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\@nnil
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\spx@boxes@radius@bottomright@x\spx@boxes@radius@bottomright@y
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\edef\spx@temp{\csname spx@#1@radius@bottomleft\endcsname\space}%
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\expandafter
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\spx@boxes@setradii
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\spx@temp
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{-\maxdimen}
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\@nnil
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\spx@boxes@radius@bottomleft@x\spx@boxes@radius@bottomleft@y
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%
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\@nameuse{ifspx@#1@withshadow}%
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\spx@boxes@withshadowtrue
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@ -160,10 +236,14 @@
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{% pict2e is available and loaded
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\def\spx@boxes@fcolorbox@setup@fcolorbox{%
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\if1% use rounded boxes only if needed
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\ifdim\spx@boxes@radius@topleft >\z@0\fi
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\ifdim\spx@boxes@radius@topright >\z@0\fi
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\ifdim\spx@boxes@radius@bottomright>\z@0\fi
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\ifdim\spx@boxes@radius@bottomleft >\z@0\fi
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\ifdim\spx@boxes@radius@topleft@x >\z@0\fi
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\ifdim\spx@boxes@radius@topright@x >\z@0\fi
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\ifdim\spx@boxes@radius@bottomright@x>\z@0\fi
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\ifdim\spx@boxes@radius@bottomleft@x >\z@0\fi
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\ifdim\spx@boxes@radius@topleft@y >\z@0\fi
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\ifdim\spx@boxes@radius@topright@y >\z@0\fi
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\ifdim\spx@boxes@radius@bottomright@y>\z@0\fi
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\ifdim\spx@boxes@radius@bottomleft@y >\z@0\fi
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1\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rectangle}%
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\else
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\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rounded}%
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@ -189,23 +269,23 @@
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% optimization.
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\def\spx@boxes@fcolorbox@setup@openbottom{%
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\spx@boxes@border@bottom \z@
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\spx@boxes@radius@bottomright\z@
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\spx@boxes@radius@bottomleft \z@
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\spx@boxes@radius@bottomright@x\z@ \spx@boxes@radius@bottomright@y\z@
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\spx@boxes@radius@bottomleft@x \z@ \spx@boxes@radius@bottomleft@y \z@
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\spx@boxes@fcolorbox@setup@fcolorbox
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}%
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\def\spx@boxes@fcolorbox@setup@opentop{%
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\spx@boxes@border@top \z@
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\spx@boxes@radius@topright\z@
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\spx@boxes@radius@topleft \z@
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\spx@boxes@radius@topright@x\z@ \spx@boxes@radius@topright@y\z@
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\spx@boxes@radius@topleft@x \z@ \spx@boxes@radius@topleft@y \z@
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\spx@boxes@fcolorbox@setup@fcolorbox
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}%
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\def\spx@boxes@fcolorbox@setup@openboth{%
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\spx@boxes@border@top \z@
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\spx@boxes@border@bottom \z@
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\spx@boxes@radius@topright\z@
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\spx@boxes@radius@topleft \z@
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\spx@boxes@radius@bottomright\z@
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\spx@boxes@radius@bottomleft \z@
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\spx@boxes@radius@bottomright@x\z@ \spx@boxes@radius@bottomright@y\z@
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\spx@boxes@radius@bottomleft@x \z@ \spx@boxes@radius@bottomleft@y \z@
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\spx@boxes@radius@topright@x\z@ \spx@boxes@radius@topright@y\z@
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\spx@boxes@radius@topleft@x \z@ \spx@boxes@radius@topleft@y \z@
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\def\spx@boxes@fcolorbox{\spx@boxes@fcolorbox@rectangle}%
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}%
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@ -567,9 +647,12 @@
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% one filling up to external border, the second one actually filling for the
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% background paradoxically on top of it, up to internal border path.
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%
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% This 6.2.0 abandonment of \strokepath allowed great simplifcation in
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% This 6.2.0 abandonment of \strokepath allowed great simplification in
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% supporting opentop, openbottom and openboth situations, and it can
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% allow automatic support of openleft and openright analogs.
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%
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% And 6.2.0 also implements elliptical arcs thanks to ellipse package,
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% which extends pict2e.
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% Currently, inset shadow is not supported.
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%
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@ -588,43 +671,89 @@
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\def\spx@moveto(#1,#2){\moveto({\strip@pt\dimexpr#1\relax},{\strip@pt\dimexpr#2\relax})}
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\def\spx@lineto(#1,#2){\lineto({\strip@pt\dimexpr#1\relax},{\strip@pt\dimexpr#2\relax})}
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% attention here the [N] becomes mandatory
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% \circlearc[<N>]{<X>}{<Y>}{<RAD>}{<ANGLE1>}{<ANGLE2>}
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\def\spx@circlearc[#1]#2#3#4%#5#6
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{\circlearc[#1]{\strip@pt\dimexpr#2\relax}%
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{\strip@pt\dimexpr#3\relax}%
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{\strip@pt\dimexpr#4\relax}}
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{\strip@pt\dimexpr#4\relax}%
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}
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% attention here too the [N] becomes mandatory
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% the core path macro of ellipse.sty. Thanks to Daan Leijen, author of this
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% package.
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% \elliparc [<initial>]{<center-x>}{<center-y>}{<x-rad>}{<y-rad>}{<start-angle>}{<end-angle>}
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% maybe this wrapper is unneeded but I don't have real time to check
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\def\spx@elliparc[#1]#2#3#4#5%#6#7
|
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{\elliparc[#1]{\strip@pt\dimexpr#2\relax}%
|
||||
{\strip@pt\dimexpr#3\relax}%
|
||||
{\strip@pt\dimexpr#4\relax}%
|
||||
{\strip@pt\dimexpr#5\relax}%
|
||||
}
|
||||
|
||||
% Macro whose execution prepares a path to be either stroked or filled
|
||||
% Only fill operation is used at 6.2.0. The radii are given by the set box
|
||||
% parameters, but the width and height are in \spx@width and \spx@height. A
|
||||
% \put command will be used for appropriate shifts.
|
||||
% 6.2.0 adds elliptical corners!
|
||||
% But I feel perhaps I need to think about how x-radius and y-radius should
|
||||
% interact with border-width. So consider output WIP for time being.
|
||||
\def\spx@boxes@border@defpath{%
|
||||
\spx@moveto(\spx@boxes@radius@bottomleft,\z@)% our \spx@moveto is a bit rigid
|
||||
% and we must use (\z@, \z@) not (0, 0) here
|
||||
\spx@lineto(\spx@width-\spx@boxes@radius@bottomright,\z@)%
|
||||
\ifdim\spx@boxes@radius@bottomright>\z@
|
||||
% probably not needed to guard against zero or negative radius
|
||||
% but let's nevertheless
|
||||
\spx@circlearc[2]{\spx@width-\spx@boxes@radius@bottomright}%
|
||||
{\spx@boxes@radius@bottomright}%
|
||||
{\spx@boxes@radius@bottomright}{-90}{0}%
|
||||
\spx@moveto(\spx@boxes@radius@bottomleft@x,\z@)% our \spx@moveto is a bit rigid
|
||||
% and we must use \z@ not 0 here
|
||||
\spx@lineto(\spx@width-\spx@boxes@radius@bottomright@x,\z@)%
|
||||
% x and y radii are either both positive or both zero
|
||||
% probably not needed to actually guard against the latter case,
|
||||
% let's do it nevertheless
|
||||
\ifdim\spx@boxes@radius@bottomright@x>\z@
|
||||
\ifdim\spx@boxes@radius@bottomright@x=\spx@boxes@radius@bottomright@y
|
||||
\spx@circlearc[2]{\spx@width-\spx@boxes@radius@bottomright@x}%
|
||||
{\spx@boxes@radius@bottomright@y}%
|
||||
{\spx@boxes@radius@bottomright@x}{-90}{0}%
|
||||
\else
|
||||
\spx@elliparc[2]{\spx@width-\spx@boxes@radius@bottomright@x}%
|
||||
{\spx@boxes@radius@bottomright@y}%
|
||||
{\spx@boxes@radius@bottomright@x}
|
||||
{\spx@boxes@radius@bottomright@y}{-90}{0}%
|
||||
\fi
|
||||
\fi
|
||||
\spx@lineto(\spx@width,%
|
||||
\spx@height-\spx@boxes@radius@topright)%
|
||||
\ifdim\spx@boxes@radius@topright>\z@
|
||||
\spx@circlearc[2]{\spx@width-\spx@boxes@radius@topright}
|
||||
{\spx@height-\spx@boxes@radius@topright}%
|
||||
{\spx@boxes@radius@topright}{0}{90}%
|
||||
\spx@height-\spx@boxes@radius@topright@y)%
|
||||
\ifdim\spx@boxes@radius@topright@x>\z@
|
||||
\ifdim\spx@boxes@radius@topright@x=\spx@boxes@radius@topright@y
|
||||
\spx@circlearc[2]{\spx@width-\spx@boxes@radius@topright@x}
|
||||
{\spx@height-\spx@boxes@radius@topright@y}%
|
||||
{\spx@boxes@radius@topright@x}{0}{90}%
|
||||
\else
|
||||
\spx@elliparc[2]{\spx@width-\spx@boxes@radius@topright@x}
|
||||
{\spx@height-\spx@boxes@radius@topright@y}%
|
||||
{\spx@boxes@radius@topright@x}%
|
||||
{\spx@boxes@radius@topright@y}{0}{90}%
|
||||
\fi
|
||||
\fi
|
||||
\spx@lineto(\spx@boxes@radius@topleft,\spx@height)%
|
||||
\ifdim\spx@boxes@radius@topleft>\z@
|
||||
\spx@circlearc[2]{\spx@boxes@radius@topleft}%
|
||||
{\spx@height-\spx@boxes@radius@topleft}%
|
||||
{\spx@boxes@radius@topleft}{90}{180}%
|
||||
\spx@lineto(\spx@boxes@radius@topleft@x,\spx@height)%
|
||||
\ifdim\spx@boxes@radius@topleft@x>\z@
|
||||
\ifdim\spx@boxes@radius@topleft@x=\spx@boxes@radius@topleft@y
|
||||
\spx@circlearc[2]{\spx@boxes@radius@topleft@x}%
|
||||
{\spx@height-\spx@boxes@radius@topleft@y}%
|
||||
{\spx@boxes@radius@topleft@x}{90}{180}%
|
||||
\else
|
||||
\spx@elliparc[2]{\spx@boxes@radius@topleft@x}%
|
||||
{\spx@height-\spx@boxes@radius@topleft@y}%
|
||||
{\spx@boxes@radius@topleft@x}%
|
||||
{\spx@boxes@radius@topleft@y}{90}{180}%
|
||||
\fi
|
||||
\fi
|
||||
\spx@lineto(\z@,\spx@boxes@radius@bottomleft)%
|
||||
\ifdim\spx@boxes@radius@bottomleft>\z@
|
||||
\spx@circlearc[2]{\spx@boxes@radius@bottomleft}%
|
||||
{\spx@boxes@radius@bottomleft}%
|
||||
{\spx@boxes@radius@bottomleft}{180}{270}%
|
||||
\spx@lineto(\z@,\spx@boxes@radius@bottomleft@y)%
|
||||
\ifdim\spx@boxes@radius@bottomleft@x>\z@
|
||||
\ifdim\spx@boxes@radius@bottomleft@x=\spx@boxes@radius@bottomleft@y
|
||||
\spx@circlearc[2]{\spx@boxes@radius@bottomleft@x}%
|
||||
{\spx@boxes@radius@bottomleft@y}%
|
||||
{\spx@boxes@radius@bottomleft@x}{180}{270}%
|
||||
\else
|
||||
\spx@elliparc[2]{\spx@boxes@radius@bottomleft@x}%
|
||||
{\spx@boxes@radius@bottomleft@y}%
|
||||
{\spx@boxes@radius@bottomleft@x}%
|
||||
{\spx@boxes@radius@bottomleft@y}{180}{270}%
|
||||
\fi
|
||||
\fi
|
||||
}% end of definition of \spx@boxes@border@defpath
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user