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[evolution] Bug 752425 - Prompt user when To/Cc field contains many recipients

commit d01b38b043a0e1fd4e99769679bac4ad53f4d239
Author: Milan Crha <mcrha redhat com>
Date:   Wed Aug 5 18:51:49 2015 +0200

    Bug 752425 - Prompt user when To/Cc field contains many recipients

 data/org.gnome.evolution.mail.gschema.xml.in |   10 ++++
 mail/em-composer-utils.c                     |   61 ++++++++++++++++++++++++++
 mail/mail-config.ui                          |   26 +++++++++--
 mail/mail.error.xml                          |    7 +++
 modules/mail/em-composer-prefs.c             |    6 +++
 5 files changed, 105 insertions(+), 5 deletions(-)
---
diff --git a/data/org.gnome.evolution.mail.gschema.xml.in b/data/org.gnome.evolution.mail.gschema.xml.in
index 65e1dd7..0865277 100644
--- a/data/org.gnome.evolution.mail.gschema.xml.in
+++ b/data/org.gnome.evolution.mail.gschema.xml.in
@@ -185,6 +185,11 @@
       <_summary>Number of characters for wrapping</_summary>
       <_description>Will autowrap lines after given number of characters.</_description>
     </key>
+    <key name="composer-many-to-cc-recips-num" type="i">
+      <default>10</default>
+      <_summary>Number of To and CC recipients to ask 'prompt-on-many-to-cc-recips' from</_summary>
+      <_description>When to ask, when the number of To and CC recipients reaches this value.</_description>
+    </key>
     <key name="composer-toolbar-show-sign-encrypt" type="b">
       <default>false</default>
       <_summary>Whether to always show Sign and Encrypt buttons on the toolbar</_summary>
@@ -486,6 +491,11 @@
       <_summary>Prompt when switching composer mode and the content needs to lose its formatting</_summary>
       <_description>It disables/enables the repeated prompts to warn that you are switching composer mode 
and the content needs to lose its formatting.</_description>
     </key>
+    <key name="prompt-on-many-to-cc-recips" type="b">
+      <default>true</default>
+      <_summary>Prompt when sending to many To and CC recipients</_summary>
+      <_description>Enable or disable the prompt when sending to many To and CC recipients. The 
'composer-many-to-cc-recips-num' defines the threshold.</_description>
+    </key>
     <key name="browser-close-on-reply-policy" enum="org.gnome.evolution.mail.AutomaticActionPolicy">
       <default>'ask'</default>
       <_summary>Policy for automatically closing the message browser window when forwarding or replying to 
the displayed message.</_summary>
diff --git a/mail/em-composer-utils.c b/mail/em-composer-utils.c
index 12c6940..473a903 100644
--- a/mail/em-composer-utils.c
+++ b/mail/em-composer-utils.c
@@ -192,10 +192,12 @@ composer_presend_check_recipients (EMsgComposer *composer,
        EComposerHeaderTable *table;
        EComposerHeader *post_to_header;
        GString *invalid_addrs = NULL;
+       GSettings *settings;
        gboolean check_passed = FALSE;
        gint hidden = 0;
        gint shown = 0;
        gint num = 0;
+       gint num_to_cc = 0;
        gint num_bcc = 0;
        gint num_post = 0;
        gint ii;
@@ -205,6 +207,37 @@ composer_presend_check_recipients (EMsgComposer *composer,
         * when we get the message (e.g. passphrase to sign a message). */
 
        table = e_msg_composer_get_header_table (composer);
+
+       recipients = e_composer_header_table_get_destinations_to (table);
+       if (recipients) {
+               for (ii = 0; recipients[ii] != NULL; ii++) {
+                       const gchar *addr;
+
+                       addr = e_destination_get_address (recipients[ii]);
+                       if (addr == NULL || *addr == '\0')
+                               continue;
+
+                       num_to_cc++;
+               }
+
+               e_destination_freev (recipients);
+       }
+
+       recipients = e_composer_header_table_get_destinations_cc (table);
+       if (recipients) {
+               for (ii = 0; recipients[ii] != NULL; ii++) {
+                       const gchar *addr;
+
+                       addr = e_destination_get_address (recipients[ii]);
+                       if (addr == NULL || *addr == '\0')
+                               continue;
+
+                       num_to_cc++;
+               }
+
+               e_destination_freev (recipients);
+       }
+
        recipients = e_composer_header_table_get_destinations (table);
 
        cia = camel_internet_address_new ();
@@ -323,6 +356,34 @@ composer_presend_check_recipients (EMsgComposer *composer,
                g_string_free (invalid_addrs, TRUE);
        }
 
+       settings = e_util_ref_settings ("org.gnome.evolution.mail");
+       if (num_to_cc >= g_settings_get_int (settings, "composer-many-to-cc-recips-num")) {
+               gchar *num_str;
+
+               g_clear_object (&settings);
+
+               num_str = g_strdup_printf ("%d", num_to_cc);
+
+               if (!e_util_prompt_user (
+                       GTK_WINDOW (composer),
+                       "org.gnome.evolution.mail",
+                       "prompt-on-many-to-cc-recips",
+                       "mail:ask-many-to-cc-recips",
+                       num_str, NULL)) {
+                       GtkAction *action;
+
+                       g_free (num_str);
+
+                       action = E_COMPOSER_ACTION_VIEW_BCC (composer);
+                       gtk_toggle_action_set_active (GTK_TOGGLE_ACTION (action), TRUE);
+
+                       goto finished;
+               }
+
+               g_free (num_str);
+       }
+       g_clear_object (&settings);
+
        if (num > 0 && (num == num_bcc || shown == 0)) {
                /* this means that the only recipients are Bcc's */
                if (!ask_confirm_for_only_bcc (composer, shown == 0))
diff --git a/mail/mail-config.ui b/mail/mail-config.ui
index 94cc0d7..c99c3b7 100644
--- a/mail/mail-config.ui
+++ b/mail/mail-config.ui
@@ -1010,6 +1010,22 @@
                   </packing>
                 </child>
                 <child>
+                  <object class="GtkCheckButton" id="chkPromptManyToCCRecips">
+                    <property name="label" translatable="yes" comments="This is in the context of: Ask for 
confirmation before...">Sending a message to many _To and CC recipients</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
+                    <property name="use_underline">True</property>
+                    <property name="xalign">0.5</property>
+                    <property name="draw_indicator">True</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">False</property>
+                    <property name="position">2</property>
+                  </packing>
+                </child>
+                <child>
                   <object class="GtkCheckButton" id="chkPromptPrivateListReply">
                     <property name="label" translatable="yes" comments="This is in the context of: Ask for 
confirmation before...">Sending a _private reply to a mailing list message</property>
                     <property name="visible">True</property>
@@ -1022,7 +1038,7 @@
                   <packing>
                     <property name="expand">False</property>
                     <property name="fill">False</property>
-                    <property name="position">2</property>
+                    <property name="position">3</property>
                   </packing>
                 </child>
                 <child>
@@ -1038,7 +1054,7 @@
                   <packing>
                     <property name="expand">False</property>
                     <property name="fill">False</property>
-                    <property name="position">3</property>
+                    <property name="position">4</property>
                   </packing>
                 </child>
                 <child>
@@ -1054,7 +1070,7 @@
                   <packing>
                     <property name="expand">False</property>
                     <property name="fill">False</property>
-                    <property name="position">4</property>
+                    <property name="position">5</property>
                   </packing>
                 </child>
                 <child>
@@ -1070,7 +1086,7 @@
                   <packing>
                     <property name="expand">False</property>
                     <property name="fill">False</property>
-                    <property name="position">5</property>
+                    <property name="position">6</property>
                   </packing>
                 </child>
                 <child>
@@ -1086,7 +1102,7 @@
                   <packing>
                     <property name="expand">False</property>
                     <property name="fill">False</property>
-                    <property name="position">6</property>
+                    <property name="position">7</property>
                   </packing>
                 </child>
               </object>
diff --git a/mail/mail.error.xml b/mail/mail.error.xml
index ac889ce..020ddb8 100644
--- a/mail/mail.error.xml
+++ b/mail/mail.error.xml
@@ -42,6 +42,13 @@ Many email systems add an Apparently-To header to messages that only have BCC re
     <button _label="_Send" response="GTK_RESPONSE_YES"/>
   </error>
 
+  <error id="ask-many-to-cc-recips" type="warning" default="GTK_RESPONSE_YES">
+    <_primary>Are you sure you want to send a message with {0} To and CC recipients?</_primary>
+    <_secondary>You are trying to send a message to {0} recipients in To and CC fields. This would result in 
all recipients seeing the email addresses of each other. In some cases this behaviour is undesired, 
especially if they do not know each other or if privacy is a concern. Consider adding recipients to the BCC 
field instead.</_secondary>
+    <button response="GTK_RESPONSE_CANCEL" _label="_Cancel"/>
+    <button response="GTK_RESPONSE_YES" _label="_Send"></button>
+  </error>
+
   <error id="ask-send-invalid-recip-one" type="question" default="GTK_RESPONSE_YES">
     <_primary>Are you sure you want to send a message with invalid address?</_primary>
     <_secondary xml:space="preserve">The following recipient was not recognized as a valid mail address:
diff --git a/modules/mail/em-composer-prefs.c b/modules/mail/em-composer-prefs.c
index fa2f3aa..2d23221 100644
--- a/modules/mail/em-composer-prefs.c
+++ b/modules/mail/em-composer-prefs.c
@@ -1145,6 +1145,12 @@ em_composer_prefs_construct (EMComposerPrefs *prefs,
                widget, "active",
                G_SETTINGS_BIND_DEFAULT);
 
+       widget = e_builder_get_widget (prefs->builder, "chkPromptManyToCCRecips");
+       g_settings_bind (
+               settings, "prompt-on-many-to-cc-recips",
+               widget, "active",
+               G_SETTINGS_BIND_DEFAULT);
+
        widget = e_builder_get_widget (prefs->builder, "chkPromptSendInvalidRecip");
        g_settings_bind (
                settings, "prompt-on-invalid-recip",
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