[gnome-documents] lib: support loading PDFs from SkyDrive

[Debarshi Ray <debarshir src gnome org>]

commit 0bfb23786dc84d390c4bd6bde5f20987874e1e9b
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed May 30 18:38:27 2012 +0200

    lib: support loading PDFs from SkyDrive
    
    This will only work for PDFs since SkyDrive allows documents in other
    formats, and there is no way to convert them to PDF on the service
    side, we need to run unoconv ourselves.
    
    Fixes: https://bugzilla.gnome.org/666535

 configure.ac            |    1 +
 src/Makefile-lib.am     |    3 +-
 src/documents.js        |    5 +-
 src/lib/gd-pdf-loader.c |  208 +++++++++++++++++++++++++++++++++++++++++++----
 src/lib/gd-pdf-loader.h |   25 ++++--
 5 files changed, 214 insertions(+), 28 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index fb2b031..d7a84c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -70,6 +70,7 @@ PKG_CHECK_MODULES(DOCUMENTS,
                   tracker-sparql-0.14 >= $TRACKER_MIN_VERSION
                   goa-1.0 >= $GOA_MIN_VERSION
                   libgdata >= $GDATA_MIN_VERSION
+                  zapojit-0.0
                   oauth)
 
 PKG_CHECK_MODULES(MINER,
diff --git a/src/Makefile-lib.am b/src/Makefile-lib.am
index b75e7b1..7fdb07a 100644
--- a/src/Makefile-lib.am
+++ b/src/Makefile-lib.am
@@ -76,7 +76,8 @@ Gd_1_0_gir_INCLUDES = \
    Goa-1.0 \
    Gtk-3.0 \
    EvinceDocument-3.0 \
-   EvinceView-3.0
+   EvinceView-3.0 \
+   Zpj-0.0
 
 Gd_1_0_gir_FILES = \
     $(addprefix $(srcdir)/,$(gdprivate_source_h)) \
diff --git a/src/documents.js b/src/documents.js
index 8ce708d..c7636f3 100644
--- a/src/documents.js
+++ b/src/documents.js
@@ -27,6 +27,7 @@ const GData = imports.gi.GData;
 const GLib = imports.gi.GLib;
 const GObject = imports.gi.GObject;
 const Gtk = imports.gi.Gtk;
+const Zpj = imports.gi.Zpj;
 const _ = imports.gettext.gettext;
 
 const Lang = imports.lang;
@@ -716,11 +717,11 @@ const GoogleDocument = new Lang.Class({
                     return;
                 }
 
-                Gd.pdf_loader_load_entry_async
+                Gd.pdf_loader_load_gdata_entry_async
                     (entry, service, cancellable, Lang.bind(this,
                         function(source, res) {
                             try {
-                                let document = Gd.pdf_loader_load_entry_finish(res);
+                                let document = Gd.pdf_loader_load_gdata_entry_finish(res);
                                 callback(this, document, null);
                             } catch (e) {
                                 callback(this, null, e);
diff --git a/src/lib/gd-pdf-loader.c b/src/lib/gd-pdf-loader.c
index f079cf8..26c08ce 100644
--- a/src/lib/gd-pdf-loader.c
+++ b/src/lib/gd-pdf-loader.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011 Red Hat, Inc.
+ * Copyright (c) 2011, 2012 Red Hat, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by 
@@ -39,11 +39,15 @@ typedef struct {
   gchar *pdf_path;
   GPid unoconv_pid;
 
-  GDataDownloadStream *stream;
+  GInputStream *stream;
+
   GDataEntry *gdata_entry;
   GDataService *gdata_service;
   gchar *document_id;
 
+  ZpjSkydriveEntry *zpj_entry;
+  ZpjSkydrive *zpj_service;
+
   guint64 pdf_cache_mtime;
   guint64 original_file_mtime;
 
@@ -53,6 +57,7 @@ typedef struct {
 
 static void pdf_load_job_gdata_refresh_cache (PdfLoadJob *job);
 static void pdf_load_job_openoffice_refresh_cache (PdfLoadJob *job);
+static void pdf_load_job_zpj_refresh_cache (PdfLoadJob *job);
 
 /* --------------------------- utils -------------------------------- */
 
@@ -116,6 +121,8 @@ pdf_load_job_free (PdfLoadJob *job)
   g_clear_object (&job->stream);
   g_clear_object (&job->gdata_service);
   g_clear_object (&job->gdata_entry);
+  g_clear_object (&job->zpj_service);
+  g_clear_object (&job->zpj_entry);
 
   g_free (job->uri);
   g_free (job->document_id);
@@ -138,7 +145,8 @@ pdf_load_job_free (PdfLoadJob *job)
 static PdfLoadJob *
 pdf_load_job_new (GSimpleAsyncResult *result,
                   const gchar *uri,
-                  GDataEntry *entry,
+                  GDataEntry *gdata_entry,
+                  ZpjSkydriveEntry *zpj_entry,
                   GCancellable *cancellable)
 {
   PdfLoadJob *retval;
@@ -151,8 +159,10 @@ pdf_load_job_new (GSimpleAsyncResult *result,
 
   if (uri != NULL)
     retval->uri = g_strdup (uri);
-  if (entry != NULL)
-    retval->gdata_entry = g_object_ref (entry);
+  if (gdata_entry != NULL)
+    retval->gdata_entry = g_object_ref (gdata_entry);
+  if (zpj_entry != NULL)
+    retval->zpj_entry = g_object_ref (zpj_entry);
   if (cancellable != NULL)
     retval->cancellable = g_object_ref (cancellable);
 
@@ -187,6 +197,8 @@ pdf_load_job_force_refresh_cache (PdfLoadJob *job)
 
   if (job->gdata_entry != NULL)
     pdf_load_job_gdata_refresh_cache (job);
+  if (job->zpj_entry != NULL)
+    pdf_load_job_zpj_refresh_cache (job);
   else
     pdf_load_job_openoffice_refresh_cache (job);
 }
@@ -355,7 +367,34 @@ pdf_load_job_gdata_refresh_cache (PdfLoadJob *job)
     return;
   }
 
-  job->stream = stream;
+  job->stream = G_INPUT_STREAM (stream);
+  pdf_file = g_file_new_for_path (job->pdf_path);
+
+  g_file_replace_async (pdf_file, NULL, FALSE,
+                        G_FILE_CREATE_PRIVATE,
+                        G_PRIORITY_DEFAULT,
+                        job->cancellable, file_replace_ready_cb,
+                        job);
+
+  g_object_unref (pdf_file);
+}
+
+static void
+pdf_load_job_zpj_refresh_cache (PdfLoadJob *job)
+{
+  GInputStream *stream;
+  GError *error = NULL;
+  GFile *pdf_file;
+
+  job->stream = zpj_skydrive_download_file_to_stream (job->zpj_service,
+                                                      ZPJ_SKYDRIVE_FILE (job->zpj_entry),
+                                                      job->cancellable, &error);
+
+  if (error != NULL) {
+    pdf_load_job_complete_error (job, error);
+    return;
+  }
+
   pdf_file = g_file_new_for_path (job->pdf_path);
 
   g_file_replace_async (pdf_file, NULL, FALSE,
@@ -402,6 +441,40 @@ gdata_cache_query_info_ready_cb (GObject *source,
 }
 
 static void
+zpj_cache_query_info_ready_cb (GObject *source,
+                               GAsyncResult *res,
+                               gpointer user_data)
+{
+  PdfLoadJob *job = user_data;
+  GError *error = NULL;
+  GFileInfo *info;
+  guint64 cache_mtime;
+
+  info = g_file_query_info_finish (G_FILE (source), res, &error);
+
+  if (error != NULL) {
+    /* create/invalidate cache */
+    pdf_load_job_zpj_refresh_cache (job);
+    g_error_free (error);
+
+    return;
+  }
+
+  job->pdf_cache_mtime = cache_mtime =
+    g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_TIME_MODIFIED);
+  g_object_unref (info);
+
+  if (job->original_file_mtime != cache_mtime) {
+    pdf_load_job_zpj_refresh_cache (job);
+  } else {
+    job->from_old_cache = TRUE;
+
+    /* load the cached file */
+    pdf_load_job_from_pdf (job);
+  }
+}
+
+static void
 pdf_load_job_from_google_documents (PdfLoadJob *job)
 {
   gchar *tmp_name;
@@ -433,6 +506,39 @@ pdf_load_job_from_google_documents (PdfLoadJob *job)
 }
 
 static void
+pdf_load_job_from_skydrive (PdfLoadJob *job)
+{
+  gchar *tmp_name;
+  gchar *tmp_path, *pdf_path;
+  GDateTime *updated_time;
+  GFile *pdf_file;
+
+  updated_time = zpj_skydrive_entry_get_updated_time (job->zpj_entry);
+  job->original_file_mtime = (guint64) g_date_time_to_unix (updated_time);
+
+  tmp_name = g_strdup_printf ("gnome-documents-%u.pdf",
+                              g_str_hash (zpj_skydrive_entry_get_id (job->zpj_entry)));
+  tmp_path = g_build_filename (g_get_user_cache_dir (), "gnome-documents", NULL);
+  job->pdf_path = pdf_path =
+    g_build_filename (tmp_path, tmp_name, NULL);
+  g_mkdir_with_parents (tmp_path, 0700);
+
+  pdf_file = g_file_new_for_path (pdf_path);
+
+  g_file_query_info_async (pdf_file,
+                           G_FILE_ATTRIBUTE_TIME_MODIFIED,
+                           G_FILE_QUERY_INFO_NONE,
+                           G_PRIORITY_DEFAULT,
+                           job->cancellable,
+                           zpj_cache_query_info_ready_cb,
+                           job);
+
+  g_free (tmp_name);
+  g_free (tmp_path);
+  g_object_unref (pdf_file);
+}
+
+static void
 pdf_load_job_from_gdata_cache (PdfLoadJob *job)
 {
   gchar *tmp_name;
@@ -450,6 +556,23 @@ pdf_load_job_from_gdata_cache (PdfLoadJob *job)
 }
 
 static void
+pdf_load_job_from_zpj_cache (PdfLoadJob *job)
+{
+  gchar *tmp_name;
+  gchar *tmp_path;
+
+  tmp_name = g_strdup_printf ("gnome-documents-%u.pdf",
+                              g_str_hash (job->document_id));
+  tmp_path = g_build_filename (g_get_user_cache_dir (), "gnome-documents", NULL);
+  job->pdf_path = g_build_filename (tmp_path, tmp_name, NULL);
+
+  pdf_load_job_from_pdf (job);
+
+  g_free (tmp_path);
+  g_free (tmp_name);
+}
+
+static void
 unoconv_child_watch_cb (GPid pid,
                         gint status,
                         gpointer user_data)
@@ -679,6 +802,7 @@ static void
 pdf_load_job_from_regular_file (PdfLoadJob *job)
 {
   GFile *file;
+  const gchar *zpj_prefix = "windows-live:skydrive:";
 
   if (g_str_has_prefix (job->uri, "https://docs.google.com";)) {
     job->document_id = document_id_from_entry_id (job->uri);
@@ -686,6 +810,12 @@ pdf_load_job_from_regular_file (PdfLoadJob *job)
     return;
   }
 
+  if (g_str_has_prefix (job->uri, zpj_prefix)) {
+    job->document_id = g_strdup (job->uri + strlen (zpj_prefix));
+    pdf_load_job_from_zpj_cache (job);
+    return;
+  }
+
   file = g_file_new_for_uri (job->uri);
   g_file_query_info_async (file,
                            G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
@@ -703,6 +833,8 @@ pdf_load_job_start (PdfLoadJob *job)
 {
   if (job->gdata_entry != NULL)
     pdf_load_job_from_google_documents (job);
+  else if (job->zpj_entry != NULL)
+    pdf_load_job_from_skydrive (job);
   else
     pdf_load_job_from_regular_file (job);
 }
@@ -719,7 +851,7 @@ gd_pdf_loader_load_uri_async (const gchar *uri,
   result = g_simple_async_result_new (NULL, callback, user_data,
                                       gd_pdf_loader_load_uri_async);
 
-  job = pdf_load_job_new (result, uri, NULL, cancellable);
+  job = pdf_load_job_new (result, uri, NULL, NULL, cancellable);
 
   pdf_load_job_start (job);
 
@@ -748,19 +880,19 @@ gd_pdf_loader_load_uri_finish (GAsyncResult *res,
 
 
 void
-gd_pdf_loader_load_entry_async (GDataEntry *entry,
-                                GDataDocumentsService *service,
-                                GCancellable *cancellable,
-                                GAsyncReadyCallback callback,
-                                gpointer user_data)
+gd_pdf_loader_load_gdata_entry_async (GDataEntry *entry,
+                                      GDataDocumentsService *service,
+                                      GCancellable *cancellable,
+                                      GAsyncReadyCallback callback,
+                                      gpointer user_data)
 {
   PdfLoadJob *job;
   GSimpleAsyncResult *result;
 
   result = g_simple_async_result_new (NULL, callback, user_data,
-                                      gd_pdf_loader_load_entry_async);
+                                      gd_pdf_loader_load_gdata_entry_async);
 
-  job = pdf_load_job_new (result, NULL, entry, cancellable);
+  job = pdf_load_job_new (result, NULL, entry, NULL, cancellable);
   job->gdata_service = g_object_ref (service);
 
   pdf_load_job_start (job);
@@ -769,15 +901,57 @@ gd_pdf_loader_load_entry_async (GDataEntry *entry,
 }
 
 /**
- * gd_pdf_loader_load_entry_finish:
+ * gd_pdf_loader_load_gdata_entry_finish:
+ * @res:
+ * @error: (allow-none) (out):
+ *
+ * Returns: (transfer full):
+ */
+EvDocument *
+gd_pdf_loader_load_gdata_entry_finish (GAsyncResult *res,
+                                       GError **error)
+{
+  EvDocument *retval;
+
+  if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (res), error))
+    return NULL;
+
+  retval = g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (res));
+  return retval;
+}
+
+
+void
+gd_pdf_loader_load_zpj_entry_async (ZpjSkydriveEntry *entry,
+                                    ZpjSkydrive *service,
+                                    GCancellable *cancellable,
+                                    GAsyncReadyCallback callback,
+                                    gpointer user_data)
+{
+  PdfLoadJob *job;
+  GSimpleAsyncResult *result;
+
+  result = g_simple_async_result_new (NULL, callback, user_data,
+                                      gd_pdf_loader_load_zpj_entry_async);
+
+  job = pdf_load_job_new (result, NULL, NULL, entry, cancellable);
+  job->zpj_service = g_object_ref (service);
+
+  pdf_load_job_start (job);
+
+  g_object_unref (result);
+}
+
+/**
+ * gd_pdf_loader_load_zpj_entry_finish:
  * @res:
  * @error: (allow-none) (out):
  *
  * Returns: (transfer full):
  */
 EvDocument *
-gd_pdf_loader_load_entry_finish (GAsyncResult *res,
-                                 GError **error)
+gd_pdf_loader_load_zpj_entry_finish (GAsyncResult *res,
+                                     GError **error)
 {
   EvDocument *retval;
 
diff --git a/src/lib/gd-pdf-loader.h b/src/lib/gd-pdf-loader.h
index 6f27b39..deee7aa 100644
--- a/src/lib/gd-pdf-loader.h
+++ b/src/lib/gd-pdf-loader.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011 Red Hat, Inc.
+ * Copyright (c) 2011, 2012 Red Hat, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by 
@@ -26,6 +26,7 @@
 #include <gio/gio.h>
 #include <evince-document.h>
 #include <gdata/gdata.h>
+#include <zpj/zpj.h>
 
 G_BEGIN_DECLS
 
@@ -36,13 +37,21 @@ void gd_pdf_loader_load_uri_async (const gchar *uri,
 EvDocument *gd_pdf_loader_load_uri_finish (GAsyncResult *res,
                                            GError **error);
 
-void gd_pdf_loader_load_entry_async (GDataEntry *entry,
-                                     GDataDocumentsService *service,
-                                     GCancellable *cancellable,
-                                     GAsyncReadyCallback callback,
-                                     gpointer user_data);
-EvDocument *gd_pdf_loader_load_entry_finish (GAsyncResult *res,
-                                             GError **error);
+void gd_pdf_loader_load_gdata_entry_async (GDataEntry *entry,
+                                           GDataDocumentsService *service,
+                                           GCancellable *cancellable,
+                                           GAsyncReadyCallback callback,
+                                           gpointer user_data);
+EvDocument *gd_pdf_loader_load_gdata_entry_finish (GAsyncResult *res,
+                                                   GError **error);
+
+void gd_pdf_loader_load_zpj_entry_async (ZpjSkydriveEntry *entry,
+                                         ZpjSkydrive *service,
+                                         GCancellable *cancellable,
+                                         GAsyncReadyCallback callback,
+                                         gpointer user_data);
+EvDocument *gd_pdf_loader_load_zpj_entry_finish (GAsyncResult *res,
+                                                 GError **error);
 
 G_END_DECLS