Implement multicolumn support for slide formats.

The structure expected is:

    <div class="columns">
      <div class="column" width="40%">
        contents...
      </div>
      <div class="column" width="60%">
        contents...
      </div>
    </div>

Support has been added for beamer and all HTML slide formats.

Closes #1710.

Note:  later we could add a more elegant way to create
this structure in Markdown than to use raw HTML div elements.
This would come for free with a "native div syntax" (#168).
Or we could devise something specific to slides

7 files changed, 7 insertions, 0 deletions

diff --git a/data/templates/default.dzslides b/data/templates/default.dzslides
index 479d2f06e..e17e23df8 100644
--- a/data/templates/default.dzslides
+++ b/data/templates/default.dzslides
@@ -15,6 +15,7 @@ $endif$
   <style type="text/css">
       code{white-space: pre-wrap;}
       .smallcaps{font-variant: small-caps;}
+      .column{display: inline-block;}
 $if(quotes)$
       q { quotes: "“" "”" "‘" "’"; }
 $endif$
diff --git a/data/templates/default.html4 b/data/templates/default.html4
index 837b20080..37a8dc0d4 100644
--- a/data/templates/default.html4
+++ b/data/templates/default.html4
@@ -18,6 +18,7 @@ $endif$
       code{white-space: pre-wrap;}
       .smallcaps{font-variant: small-caps;}
       .line-block{white-space: pre-line;}
+      .column{display: inline-block;}
 $if(quotes)$
       q { quotes: "“" "”" "‘" "’"; }
 $endif$
diff --git a/data/templates/default.html5 b/data/templates/default.html5
index 203001f21..061966858 100644
--- a/data/templates/default.html5
+++ b/data/templates/default.html5
@@ -18,6 +18,7 @@ $endif$
       code{white-space: pre-wrap;}
       .smallcaps{font-variant: small-caps;}
       .line-block{white-space: pre-line;}
+      .column{display: inline-block;}
 $if(quotes)$
       q { quotes: "“" "”" "‘" "’"; }
 $endif$
diff --git a/data/templates/default.revealjs b/data/templates/default.revealjs
index 4350c80e8..d3504c67f 100644
--- a/data/templates/default.revealjs
+++ b/data/templates/default.revealjs
@@ -21,6 +21,7 @@ $endif$
       code{white-space: pre-wrap;}
       .smallcaps{font-variant: small-caps;}
       .line-block{white-space: pre-line;}
+      .column{display: inline-block;}
 $if(quotes)$
       q { quotes: "“" "”" "‘" "’"; }
 $endif$
diff --git a/data/templates/default.s5 b/data/templates/default.s5
index 1ba3998c3..a94459bb1 100644
--- a/data/templates/default.s5
+++ b/data/templates/default.s5
@@ -19,6 +19,7 @@ $endif$
       code{white-space: pre-wrap;}
       .smallcaps{font-variant: small-caps;}
       .line-block{white-space: pre-line;}
+      .column{display: inline-block;}
 $if(quotes)$
       q { quotes: "“" "”" "‘" "’"; }
 $endif$
diff --git a/data/templates/default.slideous b/data/templates/default.slideous
index 7f6364cfc..359640822 100644
--- a/data/templates/default.slideous
+++ b/data/templates/default.slideous
@@ -20,6 +20,7 @@ $endif$
       code{white-space: pre-wrap;}
       .smallcaps{font-variant: small-caps;}
       .line-block{white-space: pre-line;}
+      .column{display: inline-block;}
 $if(quotes)$
       q { quotes: "“" "”" "‘" "’"; }
 $endif$
diff --git a/data/templates/default.slidy b/data/templates/default.slidy
index 48bb254ae..5922d083c 100644
--- a/data/templates/default.slidy
+++ b/data/templates/default.slidy
@@ -20,6 +20,7 @@ $endif$
       code{white-space: pre-wrap;}
       .smallcaps{font-variant: small-caps;}
       .line-block{white-space: pre-line;}
+      .column{display: inline-block;}
 $if(quotes)$
       q { quotes: "“" "”" "‘" "’"; }
 $endif$