From c7fa1ce251c6468ed230d62b018ce3b29c063f16 Mon Sep 17 00:00:00 2001
From: Manuel Quiñones <manuq@laptop.org>
Date: Thu, 22 Mar 2012 19:07:54 +0000
Subject: Basic PDF reading

When a request is made with a MIME type 'application/pdf', a new tab
is opened next to the current one to show the document.  If the
document is remote, a download starts, and the progress is shown in
the toolbar's URL entry.  It can be cancelled with the X button, the
same for cancelling the loading.

Basic navigation is provided to allow a quick read of the PDF.  The
user can also save the document to the Journal to store it, and later
it may be opened in Read for featureful usage.  The controls are in a
floating toolbar, at the bottom of the document.

The PDF tabs are restored between sessions as expected.

If the user clicks on a hyperlink in a PDF, a new tab is opened next
to the current to browse it.

This uses Evince, the same backend to display the PDF document as
Read.  And WebKit to download the document, as per other downloads in
Browse.

Signed-off-by: Manuel Quiñones <manuq@laptop.org>
Acked-by: Simon Schampijer <simon@laptop.org>
---
(limited to 'browser.py')

diff --git a/browser.py b/browser.py
index 0886580..dd95746 100644
--- a/browser.py
+++ b/browser.py
@@ -36,6 +36,7 @@ from sugar3.graphics.icon import Icon
 from widgets import BrowserNotebook
 import globalhistory
 import downloadmanager
+from pdfviewer import PDFTabPage
 
 _ZOOM_AMOUNT = 0.1
 _LIBRARY_PATH = '/usr/share/library-common/index.html'
@@ -164,9 +165,25 @@ class TabbedView(BrowserNotebook):
         new_browser.load_uri(url)
         new_browser.grab_focus()
 
+    def __open_pdf_in_new_tab_cb(self, browser, url):
+        tab_page = PDFTabPage()
+        tab_page.browser.connect('new-tab', self.__new_tab_cb)
+        tab_page.browser.connect('tab-close', self.__tab_close_cb)
+
+        label = TabLabel(tab_page.browser)
+        label.connect('tab-close', self.__tab_close_cb, tab_page)
+
+        next_index = self.get_current_page() + 1
+        self.insert_page(tab_page, label, next_index)
+        tab_page.show()
+        label.show()
+        self.set_current_page(next_index)
+        tab_page.setup(url)
+
     def add_tab(self, next_to_current=False):
         browser = Browser()
         browser.connect('new-tab', self.__new_tab_cb)
+        browser.connect('open-pdf', self.__open_pdf_in_new_tab_cb)
 
         if next_to_current:
             self._insert_tab_next(browser)
@@ -271,11 +288,31 @@ class TabbedView(BrowserNotebook):
         while self.get_n_pages():
             self.remove_page(self.get_n_pages() - 1)
 
+        def is_pdf_history(tab_history):
+            return (len(tab_history) == 1 and
+                    tab_history[0]['url'].lower().endswith('pdf'))
+
         for tab_history in tab_histories:
-            browser = Browser()
-            browser.connect('new-tab', self.__new_tab_cb)
-            self._append_tab(browser)
-            browser.set_history(tab_history)
+            if is_pdf_history(tab_history):
+                url = tab_history[0]['url']
+                tab_page = PDFTabPage()
+                tab_page.browser.connect('new-tab', self.__new_tab_cb)
+                tab_page.browser.connect('tab-close', self.__tab_close_cb)
+
+                label = TabLabel(tab_page.browser)
+                label.connect('tab-close', self.__tab_close_cb, tab_page)
+
+                self.append_page(tab_page, label)
+                tab_page.show()
+                label.show()
+                tab_page.setup(url, title=tab_history[0]['title'])
+
+            else:
+                browser = Browser()
+                browser.connect('new-tab', self.__new_tab_cb)
+                browser.connect('open-pdf', self.__open_pdf_in_new_tab_cb)
+                self._append_tab(browser)
+                browser.set_history(tab_history)
 
 
 Gtk.rc_parse_string('''
@@ -418,6 +455,9 @@ class Browser(WebKit.WebView):
         'new-tab': (GObject.SignalFlags.RUN_FIRST,
                     None,
                     ([str])),
+        'open-pdf': (GObject.SignalFlags.RUN_FIRST,
+                     None,
+                     ([str])),
     }
 
     CURRENT_SUGAR_VERSION = '0.96'
@@ -529,7 +569,12 @@ class Browser(WebKit.WebView):
 
     def __mime_type_policy_cb(self, webview, frame, request, mimetype,
                               policy_decision):
-        if not self.can_show_mime_type(mimetype):
+        if mimetype == 'application/pdf':
+            self.emit('open-pdf', request.get_uri())
+            return False
+        elif self.can_show_mime_type(mimetype):
+            return True
+        else:
             policy_decision.download()
         return True
 
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