Make page range optional in --rotate (fixes #211)

ChangeLog

@@ -1,5 +1,9 @@
 2018-06-21  Jay Berkenbilt  <ejb@ql.org>
 
+	* The --rotate option to qpdf no longer requires an explicit page
+	range. You can now rotate all pages of a document with
+	qpdf --rotate=angle in.pdf out.pdf. Fixes #211.
+
 	* Create examples/pdf-set-form-values.cc to illustrate use of
 	interactive form helpers.
 

manual/qpdf-manual.xml

@@ -412,22 +412,26 @@ make
       </listitem>
      </varlistentry>
      <varlistentry>
-      <term><option>--rotate=[+|-]angle:page-range</option></term>
+      <term><option>--rotate=[+|-]angle[:page-range]</option></term>
       <listitem>
        <para>
         Apply rotation to specified pages. The
         <option>page-range</option> portion of the option value has
         the same format as page ranges in <xref
-        linkend="ref.page-selection"/>. The <option>angle</option>
+        linkend="ref.page-selection"/>. If the page range is omitted,
-        portion of the parameter may be either 90, 180, or 270. If
+        the rotation is applied to all pages. The
-        preceded by <option>+</option> or <option>-</option>, the
+        <option>angle</option> portion of the parameter may be either
-        angle is added to or subtracted from the specified pages'
+        90, 180, or 270. If preceded by <option>+</option> or
-        original rotations. Otherwise the pages' rotations are set to
+        <option>-</option>, the angle is added to or subtracted from
-        the exact value. For example, the command <command>qpdf in.pdf
+        the specified pages' original rotations. Otherwise the pages'
-        out.pdf --rotate=+90:2,4,6 --rotate=180:7-8</command> would
+        rotations are set to the exact value. For example, the command
-        rotate pages 2, 4, and 6 90 degrees clockwise from their
+        <command>qpdf in.pdf out.pdf --rotate=+90:2,4,6
-        original rotation and force the rotation of pages 7 through 9
+        --rotate=180:7-8</command> would rotate pages 2, 4, and 6 90
-        to 180 degrees regardless of their original rotation.
+        degrees clockwise from their original rotation and force the
+        rotation of pages 7 through 9 to 180 degrees regardless of
+        their original rotation, and the command <command>qpdf in.pdf
+        out.pdf --rotate=180</command> would rotate all pages by 180
+        degrees.
        </para>
       </listitem>
      </varlistentry>

qpdf/qpdf.cc

@@ -241,8 +241,9 @@ Basic Options\n\
 --decrypt               remove any encryption on the file\n\
 --password-is-hex-key   treat primary password option as a hex-encoded key\n\
 --pages options --      select specific pages from one or more files\n\
---rotate=[+|-]angle:page-range\n\
+--rotate=[+|-]angle[:page-range]\n\
-                        rotate each specified page 90, 180, or 270 degrees\n\
+                        rotate each specified page 90, 180, or 270 degrees;\n\
+                        rotate all pages if no page range is given\n\
 --split-pages=[n]       write each output page to a separate file\n\
 \n\
 Note that you can use the @filename or @- syntax for any argument at any\n\
@@ -1303,25 +1304,33 @@ static void parse_rotation_parameter(Options& o, std::string const& parameter)
         if (colon > 0)
         {
             angle_str = parameter.substr(0, colon);
-            if (angle_str.length() > 0)
-            {
-                char first = angle_str.at(0);
-                if ((first == '+') || (first == '-'))
-                {
-                    relative = ((first == '+') ? 1 : -1);
-                    angle_str = angle_str.substr(1);
-                }
-                else if (! QUtil::is_digit(angle_str.at(0)))
-                {
-                    angle_str = "";
-                }
-            }
         }
         if (colon + 1 < parameter.length())
         {
             range = parameter.substr(colon + 1);
         }
     }
+    else
+    {
+        angle_str = parameter;
+    }
+    if (angle_str.length() > 0)
+    {
+        char first = angle_str.at(0);
+        if ((first == '+') || (first == '-'))
+        {
+            relative = ((first == '+') ? 1 : -1);
+            angle_str = angle_str.substr(1);
+        }
+        else if (! QUtil::is_digit(angle_str.at(0)))
+        {
+            angle_str = "";
+        }
+    }
+    if (range.empty())
+    {
+        range = "1-z";
+    }
     bool range_valid = false;
     try
     {

qpdf/qtest/qpdf.test

@@ -1124,7 +1124,7 @@ foreach my $d (@sp_cases)
 show_ntests();
 # ----------
 $td->notify("--- Rotate Pages ---");
-$n_tests += 2;
+$n_tests += 4;
 # Do absolute, positive, and negative on ranges that include
 # inherited and non-inherited.
 # Pages 11-15 inherit /Rotate 90
@@ -1141,6 +1141,14 @@ $td->runtest("check output",
              {$td->FILE => "a.pdf"},
              {$td->FILE => "rotated.pdf"});
 
+$td->runtest("rotate all pages",
+             {$td->COMMAND =>
+                  "qpdf --static-id --rotate=180 minimal.pdf a.pdf"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0});
+$td->runtest("check output",
+             {$td->FILE => "a.pdf"},
+             {$td->FILE => "minimal-rotated.pdf"});
+
 show_ntests();
 # ----------
 $td->notify("--- Numeric range parsing tests ---");