From dd73b97b6cc8575c7f2ae3ba43a13651822e8269 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 28 Dec 2012 00:01:49 +0530
Subject: [PATCH] Start work on links in the new pdf output engine

---
 src/calibre/ebooks/pdf/render/from_html.py |  7 ++++-
 src/calibre/ebooks/pdf/render/links.py     | 32 ++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)
 create mode 100644 src/calibre/ebooks/pdf/render/links.py

diff --git a/src/calibre/ebooks/pdf/render/from_html.py b/src/calibre/ebooks/pdf/render/from_html.py
index 2c3652ae11..354222e3d5 100644
--- a/src/calibre/ebooks/pdf/render/from_html.py
+++ b/src/calibre/ebooks/pdf/render/from_html.py
@@ -17,9 +17,11 @@ from PyQt4.QtWebKit import QWebView, QWebPage, QWebSettings
 
 from calibre import fit_image
 from calibre.ebooks.oeb.display.webview import load_html
-from calibre.ebooks.pdf.render.engine import PdfDevice
 from calibre.ebooks.pdf.render.common import (inch, cm, mm, pica, cicero,
                                               didot, PAPER_SIZES)
+from calibre.ebooks.pdf.render.engine import PdfDevice
+from calibre.ebooks.pdf.render.links import Links
+
 
 def get_page_size(opts, for_comic=False): # {{{
     use_profile = not (opts.override_profile_size or
@@ -141,6 +143,7 @@ class PDFWriter(QObject):
             self.view.page().mainFrame().setScrollBarPolicy(x,
                     Qt.ScrollBarAlwaysOff)
         self.report_progress = lambda x, y: x
+        self.links = Links()
 
     def dump(self, items, out_stream, pdf_metadata):
         opts = self.opts
@@ -258,6 +261,8 @@ class PDFWriter(QObject):
         amap = self.bridge_value
         if not isinstance(amap, dict):
             amap = {'links':[], 'anchors':{}} # Some javascript error occurred
+        self.links.add(self.current_item, self.current_page_num, amap['links'],
+                       amap['anchors'])
 
         mf = self.view.page().mainFrame()
         while True:
diff --git a/src/calibre/ebooks/pdf/render/links.py b/src/calibre/ebooks/pdf/render/links.py
new file mode 100644
index 0000000000..0d23855d09
--- /dev/null
+++ b/src/calibre/ebooks/pdf/render/links.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__   = 'GPL v3'
+__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
+import os
+
+from calibre.ebooks.pdf.render.common import Array, Name
+
+class Destination(Array):
+
+    def __init__(self, start_page, pos):
+        super(Destination, self).__init__(
+            [start_page + pos['column'], Name('FitH'), pos['y']])
+
+class Links(object):
+
+    def __init__(self):
+        self.anchors = {}
+
+    def add(self, base_path, start_page, links, anchors):
+        path = os.path.normcase(os.path.abspath(base_path))
+        self.anchors[path] = a = {}
+        a[None] = Destination(start_page, {'y':0, 'column':0})
+        for anchor, pos in anchors.iteritems():
+            a[anchor] = Destination(start_page, pos)
+
+