Add some help content to test-passive.oxt

...mainly to test how well/poorly extension help is supported by
--with-help=html, but also as a kind of reference implementation.  (There are
also extensions in odk/examples/ that contain help content, namely
odk/examples/DevelopersGuide/Extensions/DialogWithHelp/ containing context-
sensitive help for a dialog, a topic that is not covered here.)

See <https://wiki.openoffice.org/wiki/Documentation/DevGuide/Extensions/
Help_Content#Integration_into_the_OpenOffice.org_help_system> for the ways an
extension's help content can be integrated into the "classic" (plain
--with-help) help system (citing sub-section headings used in that document):

* Help Viewer Contents page:

  The contained help.tree provides a "The test-passive Extension" section with
  a "The test-passive Extension" page (main.xhp).

* Help Viewer Index page:

  The contained main.xhp provides index entries for "test-passive extension" and
  "extensions"-"test-passive", and---only on the index pages of Calc and Writer
  ---for "test-passive extension in Calc and Writer".

* Help Viewer Find page:

  The contained main.xhp is indexer="include", so it should be found by e.g.
  searching for "bla bla".

* Context sensitive help and extended tool tips:

  The contained Addons.xcu has been extended with a small (floating by default)
  toolbar containing a "native" button (doing the same as the "passive - native"
  menu entry), and the contained main.xhp provides an extended tooltip of "Show
  the test-passive extension's native dialog" for that toolbar button (displayed
  when using "Help - What's This?" and hovering over the button).

  For context-sensitive help for dialogs, see the mention of
  odk/examples/DevelopersGuide/Extensions/DialogWithHelp/ above.

The contained help is only provided in "en" localization, which should thus be
used as fallback regardless for which locale LO is run.

The help-related XML files need to provide identifiers in lots of places, many
of which appear to be unused for the given example uses.  I specified those as
empty strings.

The workdir/Extension/test-passive.oxt extension can be built with `make
Extension_test-passive`.

Change-Id: I0e75f35df85683c9fae1d1384fa6afeaeb8a687d
Reviewed-on: https://gerrit.libreoffice.org/55736
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

desktop/Extension_test-passive.mk

@@ -20,6 +20,14 @@ $(eval $(call gb_Extension_add_files,test-passive,, \
     $(call gb_Jar_get_target,passive_java) \
 ))
 
+$(eval $(call gb_Extension_add_files,test-passive,help/en, \
+    $(SRCDIR)/desktop/test/deployment/passive/help/en/help.tree \
+))
+
+$(eval $(call gb_Extension_add_files,test-passive,help/en/org.openoffice%2Fframework%2Fdesktop%2Ftest%2Fdeployment%2Fpassive, \
+    $(SRCDIR)/desktop/test/deployment/passive/help/en/main.xhp \
+))
+
 $(eval $(call gb_Extension_add_libraries,test-passive, \
     passive_native \
 ))

desktop/test/deployment/passive/Addons.xcu

@@ -54,6 +54,21 @@
           </node>
         </node>
       </node>
+      <node o:name="OfficeToolBar">
+        <node o:name="org.openoffice.test.desktop.deployment.passive" o:op="replace">
+          <node o:name="1" o:op="replace">
+            <prop o:name="URL">
+              <value>vnd.org.openoffice.test.desktop.deployment.passive_native:</value>
+            </prop>
+            <prop o:name="Title" xml:lang="en-US">
+              <value>native</value>
+            </prop>
+            <prop o:name="Context">
+              <value/>
+            </prop>
+          </node>
+        </node>
+      </node>
     </node>
   </item>
 </o:items>

desktop/test/deployment/passive/META-INF/manifest.xml

@@ -22,6 +22,7 @@
       m:full-path="Addons.xcu"/>
   <m:file-entry m:media-type="application/vnd.sun.star.configuration-data"
       m:full-path="ProtocolHandler.xcu"/>
+  <m:file-entry m:media-type="application/vnd.sun.star.help" m:full-path="help"/>
   <m:file-entry
       m:media-type="application/vnd.sun.star.uno-components;platform=@PLATFORM@"
       m:full-path="platform.components"/>

desktop/test/deployment/passive/help/en/help.tree

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+-->
+<tree_view version="10-Aug-2010">
+  <help_section application="OrgOpenofficeFrameworkDesktopTestDeploymentPassive" id=""
+      title="The test-passive Extension">
+    <topic
+        id="OrgOpenofficeFrameworkDesktopTestDeploymentPassive/org.openoffice%2Fframework%2Fdesktop%2Ftest%2Fdeployment%2Fpassive/main.xhp">The test-passive Extension</topic>
+  </help_section>
+</tree_view>

desktop/test/deployment/passive/help/en/main.xhp

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+-->
+<helpdocument version="1.0">
+  <meta>
+    <topic id="" indexer="include">
+      <title xml-lang="en" id="">The test-passive Extension</title>
+      <filename>/org.openoffice%2Fframework%2Fdesktop%2Ftest%2Fdeployment%2Fpassive/main.xhp</filename>
+      <bookmark branch="index" xml-lang="en" id="">
+        <bookmark_value>test-passive extension</bookmark_value>
+        <bookmark_value>extensions;test-passive</bookmark_value>
+      </bookmark>
+      <bookmark branch="index" xml-lang="en" id="_scalc_swriter">
+        <bookmark_value>test-passive extension in Calc and Writer</bookmark_value>
+      </bookmark>
+    </topic>
+  </meta>
+  <body>
+    <bookmark branch="hid/vnd.org.openoffice.test.desktop.deployment.passive_native:" xml-lang="en"
+        id=""/>
+    <paragraph role="paragraph" id="" xml-lang="en">
+      <ahelp hid="vnd.org.openoffice.test.desktop.deployment.passive_native:" visibility="hidden">
+        Show the test-passive extension's native dialog
+      </ahelp>
+    </paragraph>
+    <paragraph role="heading" level="1" id="" xml-lang="en">The test-passive Extension</paragraph>
+    <paragraph role="paragraph" id="" xml-lang="en">Bla bla bla.</paragraph>
+  </body>
+</helpdocument>

l10ntools/source/localize.cxx

@@ -58,6 +58,8 @@ bool matchList(
 
 bool passesNegativeList(const OUString& rUrl) {
     static const OUStringLiteral list[] = {
+        "/desktop/test/deployment/passive/help/en/help.tree",
+        "/desktop/test/deployment/passive/help/en/main.xhp",
         "/dictionaries.xcu",
         "/dictionaries/da_DK/help/da/help.tree",
         ("/dictionaries/da_DK/help/da/"