Bug 1204553 - xml:space="preserve" isn’t respected in the no-style-information "document tree" presentation of an XML document. r=hsivonen

Differential Revision: https://phabricator.services.mozilla.com/D203747

dom/tests/reftest/prettyprint-space-ref.xhtml

@@ -0,0 +1,67 @@
+<out>
+  <div id="top" xmlns="http://www.w3.org/1999/xhtml">
+    <link href="chrome://global/content/xml/XMLPrettyPrint.css" type="text/css" rel="stylesheet"/>
+    <div id="header">
+      <p>
+        This XML file does not appear to have any style information associated with it. The document tree is shown below.
+      </p>
+    </div>
+    <main id="tree" class="highlight">
+      <div>
+        <details open="" class="expandable-body">
+          <summary class="expandable-opening">
+            &lt;<span class="start-tag">out</span>&gt;
+          </summary>
+          <div class="expandable-children">
+            <span class="text">Here be sea hags. </span>
+            <div>
+              <details open="" class="expandable-body">
+                <summary class="expandable-opening">
+                  &lt;<span class="start-tag">b</span> <span class="attribute-name">xml:space</span>=<span class="attribute-value">"preserve"</span>&gt;
+                </summary>
+                <div class="expandable-children">
+                  <span class="text" style="white-space: pre-wrap">They need a lot of space, this much:            .</span>
+                  <div>
+                    <details open="" class="expandable-body">
+                      <summary class="expandable-opening">
+                        &lt;<span class="start-tag">c</span>&gt;
+                      </summary>
+                      <div class="expandable-children">
+                        <span class="text" style="white-space: pre-wrap">At least, most of them do:            .</span>
+                        <div>
+                          <details open="" class="expandable-body">
+                            <summary class="expandable-opening">
+                              &lt;<span class="start-tag">d</span> <span class="attribute-name">xml:space</span>=<span class="attribute-value">"default"</span>&gt;
+                            </summary>
+                            <div class="expandable-children">
+                              <span class="text" style="white-space: normal">But some of them don't, they only need one:        . </span>
+                              <div>
+                                  &lt;<span class="start-tag">e</span> <span class="attribute-name">xml:space</span>=<span class="attribute-value">"preserve"</span>&gt;<span class="text" style="white-space: pre-wrap">But their children might need more:     .</span>&lt;/<span class="end-tag">e</span>&gt;
+                              </div>
+                            </div>
+                          </details>
+                          <span class="expandable-closing">
+                            &lt;/<span class="end-tag">d</span>&gt;
+                          </span>
+                        </div>
+                      </div>
+                    </details>
+                    <span class="expandable-closing">
+                      &lt;/<span class="end-tag">c</span>&gt;
+                    </span>
+                  </div>
+                </div>
+              </details>
+              <span class="expandable-closing">
+                &lt;/<span class="end-tag">b</span>&gt;
+              </span>
+            </div>
+          </div>
+        </details>
+        <span class="expandable-closing">
+          &lt;/<span class="end-tag">out</span>&gt;
+        </span>
+      </div>
+    </main>
+  </div>
+</out>

dom/tests/reftest/prettyprint-space.xml

@@ -0,0 +1 @@
+<out>Here be sea hags.    <b xml:space="preserve">They need a lot of space, this much:            . <c>At least, most of them do:            . <d xml:space="default">But some of them don't, they only need one:        . <e xml:space="preserve">But their children might need more:     .</e></d></c></b></out>

dom/tests/reftest/reftest.list

@@ -12,3 +12,4 @@ fuzzy(0-1,0-5) == bug559996.html bug559996-ref.html
 == bug592366-2.xhtml bug592366-ref.xhtml
 == bug798068.xhtml bug798068-ref.xhtml
 == bug1389406.xml bug1389406-ref.xml
+== prettyprint-space.xml prettyprint-space-ref.xhtml

dom/xml/resources/XMLPrettyPrint.css

@@ -56,3 +56,11 @@
   font-family: monospace;
   white-space: pre;
 }
+
+.space-default {
+  white-space: initial;
+}
+
+.space-preserve {
+  white-space: pre-wrap;
+}

dom/xml/resources/XMLPrettyPrint.xsl

@@ -33,7 +33,7 @@
   </xsl:template>
 
   <xsl:template match="*[node()]">
-    <div>
+    <div><xsl:apply-templates mode="space" select="@xml:space"/>
       <xsl:text>&lt;</xsl:text>
       <span class="start-tag"><xsl:value-of select="name(.)"/></span>
       <xsl:apply-templates select="@*"/>
@@ -48,7 +48,7 @@
   </xsl:template>
 
   <xsl:template match="*[* or processing-instruction() or comment() or string-length(.) &gt; 50]">
-    <div>
+    <div><xsl:apply-templates mode="space" select="@xml:space"/>
       <details open="" class="expandable-body">
         <summary class="expandable-opening">
           <xsl:text>&lt;</xsl:text>
@@ -68,6 +68,13 @@
     </div>
   </xsl:template>
 
+  <xsl:template match="@xml:space[string() = 'default']" mode="space">
+    <xsl:attribute name="class">space-default</xsl:attribute>
+  </xsl:template>
+  <xsl:template match="@xml:space[string() = 'preserve']" mode="space">
+    <xsl:attribute name="class">space-preserve</xsl:attribute>
+  </xsl:template>
+
   <xsl:template match="@*">
     <xsl:text> </xsl:text>
     <span class="attribute-name"><xsl:value-of select="name(.)"/></span>