Add .container-fluid variation for full-width containers and layouts

/cc #10711 #9862

_includes/nav-css.html

@@ -16,6 +16,7 @@
     <li><a href="#grid-media-queries">Media queries</a></li>
     <li><a href="#grid-options">Grid options</a></li>
     <li><a href="#grid-example-basic">Ex: Stacked-to-horizonal</a></li>
+    <li><a href="#grid-example-fluid">Ex: Fluid container</a></li>
     <li><a href="#grid-example-mixed">Ex: Mobile and desktops</a></li>
     <li><a href="#grid-example-mixed-complete">Ex: Mobile, tablet, desktops</a></li>
     <li><a href="#grid-responsive-resets">Responsive column resets</a></li>

css.html

@@ -76,7 +76,7 @@ base_url: "../"
     <h3 id="grid-intro">Introduction</h3>
     <p>Grid systems are used for creating page layouts through a series of rows and columns that house your content. Here's how the Bootstrap grid system works:</p>
     <ul>
-      <li>Rows must be placed within a <code>.container</code> for proper alignment and padding.</li>
+      <li>Rows must be placed within a <code>.container</code> (fixed-width) or <code>.container-fluid</code> (full-width) for proper alignment and padding.</li>
       <li>Use rows to create horizontal groups of columns.</li>
       <li>Content should be placed within columns, and only columns may be immediate children of rows.</li>
       <li>Predefined grid classes like <code>.row</code> and <code>.col-xs-4</code> are available for quickly making grid layouts. LESS mixins can also be used for more semantic layouts.</li>
@@ -249,6 +249,16 @@ base_url: "../"
   <div class="col-md-6">.col-md-6</div>
   <div class="col-md-6">.col-md-6</div>
 </div>
+{% endhighlight %}
+
+    <h3 id="grid-example-fluid">Example: Fluid container</h3>
+    <p>Turn any fixed-width grid layout into a full-width layout by changing your outermost <code>.container</code> to <code>.container-fluid</code>.</p>
+{% highlight html %}
+<div class="container-fluid">
+  <div class="row">
+    ...
+  </div>
+</div>
 {% endhighlight %}
 
     <h3 id="grid-example-mixed">Example: Mobile and desktop</h3>

dist/css/bootstrap.css

@@ -839,6 +839,33 @@ pre code {
   }
 }
 
+.container-fluid {
+  padding-right: 15px;
+  padding-left: 15px;
+  margin-right: auto;
+  margin-left: auto;
+}
+
+.container-fluid:before,
+.container-fluid:after {
+  display: table;
+  content: " ";
+}
+
+.container-fluid:after {
+  clear: both;
+}
+
+.container-fluid:before,
+.container-fluid:after {
+  display: table;
+  content: " ";
+}
+
+.container-fluid:after {
+  clear: both;
+}
+
 .row {
   margin-right: -15px;
   margin-left: -15px;
@@ -4467,14 +4494,18 @@ textarea.input-group-sm > .input-group-btn > .btn {
 }
 
 .container > .navbar-header,
-.container > .navbar-collapse {
+.container-fluid > .navbar-header,
+.container > .navbar-collapse,
+.container-fluid > .navbar-collapse {
   margin-right: -15px;
   margin-left: -15px;
 }
 
 @media (min-width: 768px) {
   .container > .navbar-header,
-  .container > .navbar-collapse {
+  .container-fluid > .navbar-header,
+  .container > .navbar-collapse,
+  .container-fluid > .navbar-collapse {
     margin-right: 0;
     margin-left: 0;
   }
@@ -4530,7 +4561,8 @@ textarea.input-group-sm > .input-group-btn > .btn {
 }
 
 @media (min-width: 768px) {
-  .navbar > .container .navbar-brand {
+  .navbar > .container .navbar-brand,
+  .navbar > .container-fluid .navbar-brand {
     margin-left: -15px;
   }
 }

less/grid.less

@@ -2,7 +2,11 @@
 // Grid system
 // --------------------------------------------------
 
-// Set the container width, and override it for fixed navbars in media queries
+
+// Container widths
+//
+// Set the container width, and override it for fixed navbars in media queries.
+
 .container {
   .container-fixed();
 
@@ -17,12 +21,30 @@
   }
 }
 
-// mobile first defaults
+
+// Fluid container
+//
+// Utilizes the mixin meant for fixed width containers, but without any defined
+// width for fluid, full width layouts.
+
+.container-fluid {
+  .container-fixed();
+}
+
+
+// Row
+//
+// Rows contain and clear the floats of your columns.
+
 .row {
   .make-row();
 }
 
+
+// Columns
+//
 // Common styles for small and large grid columns
+
 .make-grid-columns();
 
 
@@ -76,4 +98,3 @@
   .make-grid(@grid-columns, lg, push);
   .make-grid(@grid-columns, lg, offset);
 }
-

less/navbar.less

@@ -93,14 +93,17 @@
 //
 // When a container is present, change the behavior of the header and collapse.
 
-.container > .navbar-header,
-.container > .navbar-collapse {
-  margin-right: -@navbar-padding-horizontal;
-  margin-left:  -@navbar-padding-horizontal;
+.container,
+.container-fluid {
+  > .navbar-header,
+  > .navbar-collapse {
+    margin-right: -@navbar-padding-horizontal;
+    margin-left:  -@navbar-padding-horizontal;
 
-  @media (min-width: @grid-float-breakpoint) {
-    margin-right: 0;
-    margin-left:  0;
+    @media (min-width: @grid-float-breakpoint) {
+      margin-right: 0;
+      margin-left:  0;
+    }
   }
 }
 
@@ -159,7 +162,8 @@
   }
 
   @media (min-width: @grid-float-breakpoint) {
-    .navbar > .container & {
+    .navbar > .container &,
+    .navbar > .container-fluid & {
       margin-left: -@navbar-padding-horizontal;
     }
   }