Added option to specify the message quote prefix character/string (default ">"). Applied patch provided by fiouzy (Thanks!) with some small modifications.

Fixes issue 1830

res/values/strings.xml

@@ -491,6 +491,7 @@ Welcome to K-9 Mail setup.  K-9 is an open source mail client for Android origin
     <string name="account_settings_folders">Folders</string>
 	<string name="account_settings_message_lists">Listing messages</string>
 	<string name="account_settings_message_view">Viewing messages</string>
+    <string name="account_settings_quote_prefix_label">Quote prefix</string>
     
     <string name="account_settings_mail_check_frequency_label">Folder poll check frequency</string>
     <string name="account_settings_second_class_check_frequency_label">2nd class check frequency</string>

res/xml/account_settings_preferences.xml

@@ -171,6 +171,13 @@
 		
 			/>
 
+        <EditTextPreference
+            android:key="account_quote_prefix"
+            android:singleLine="true"
+            android:title="@string/account_settings_quote_prefix_label"
+            android:summary=""
+            android:dialogTitle="@string/account_settings_quote_prefix_label" />
+
     </PreferenceCategory>
 
     <PreferenceCategory android:title="@string/account_settings_notifications">

src/com/fsck/k9/Account.java

@@ -44,6 +44,7 @@ public class Account implements BaseAccount
     public static final String TYPE_OTHER = "OTHER";
     private static String[] networkTypes = { TYPE_WIFI, TYPE_MOBILE, TYPE_OTHER };
 
+    private static final String DEFAULT_QUOTE_PREFIX = ">";
 
     /**
      * <pre>
@@ -97,6 +98,7 @@ public class Account implements BaseAccount
     // Tracks if we have sent a notification for this account for
     // current set of fetched messages
     private boolean mRingNotified;
+    private String mQuotePrefix;
 
     private List<Identity> identities;
 
@@ -146,6 +148,7 @@ public class Account implements BaseAccount
         goToUnreadMessageSearch = false;
         subscribedFoldersOnly = false;
         maximumPolledMessageAge = 10;
+        mQuotePrefix = DEFAULT_QUOTE_PREFIX;
 
         searchableFolders = Searchable.ALL;
 
@@ -215,6 +218,7 @@ public class Account implements BaseAccount
                 false);
         maximumPolledMessageAge = preferences.getPreferences().getInt(mUuid
                 + ".maximumPolledMessageAge", -1);
+        mQuotePrefix = preferences.getPreferences().getString(mUuid + ".quotePrefix", DEFAULT_QUOTE_PREFIX);
         for (String type : networkTypes)
         {
             Boolean useCompression = preferences.getPreferences().getBoolean(mUuid + ".useCompression." + type,
@@ -386,6 +390,7 @@ public class Account implements BaseAccount
         editor.remove(mUuid + ".goToUnreadMessageSearch");
         editor.remove(mUuid + ".subscribedFoldersOnly");
         editor.remove(mUuid + ".maximumPolledMessageAge");
+        editor.remove(mUuid + ".quotePrefix");
         for (String type : networkTypes)
         {
             editor.remove(mUuid + ".useCompression." + type);
@@ -471,6 +476,7 @@ public class Account implements BaseAccount
         editor.putBoolean(mUuid + ".goToUnreadMessageSearch", goToUnreadMessageSearch);
         editor.putBoolean(mUuid + ".subscribedFoldersOnly", subscribedFoldersOnly);
         editor.putInt(mUuid + ".maximumPolledMessageAge", maximumPolledMessageAge);
+        editor.putString(mUuid + ".quotePrefix", mQuotePrefix);
         
         for (String type : networkTypes)
         {
@@ -1242,6 +1248,7 @@ public class Account implements BaseAccount
     {
         this.maximumPolledMessageAge = maximumPolledMessageAge;
     }
+
     public Date getEarliestPollDate()
     {
         int age = getMaximumPolledMessageAge();
@@ -1282,4 +1289,14 @@ public class Account implements BaseAccount
             return null;
         }
     }
+
+    public String getQuotePrefix()
+    {
+        return mQuotePrefix;
+    }
+
+    public void setQuotePrefix(String quotePrefix)
+    {
+        mQuotePrefix = quotePrefix;
+    }
 }

src/com/fsck/k9/activity/MessageCompose.java

@@ -1343,7 +1343,13 @@ public class MessageCompose extends K9Activity implements OnClickListener, OnFoc
                                             getString(R.string.message_compose_reply_header_fmt),
                                             Address.toString(mSourceMessage.getFrom()));
 
-                    quotedText += MimeUtility.getTextFromPart(part).replaceAll("(?m)^", ">");
+                    final String prefix = mAccount.getQuotePrefix();
+                    // "$" and "\" in the quote prefix have to be escaped for
+                    // the replaceAll() invocation.
+                    final String escapedPrefix = prefix.replaceAll("(\\\\|\\$)", "\\\\$1");
+                    quotedText += MimeUtility.getTextFromPart(part).replaceAll(
+                            "(?m)^", escapedPrefix);
+
                     quotedText = quotedText.replaceAll("\\\r", "");
                     mQuotedText.setText(quotedText);
 

src/com/fsck/k9/activity/setup/AccountSettings.java

@@ -53,7 +53,7 @@ public class AccountSettings extends K9PreferenceActivity
     private static final String PREFERENCE_LED_COLOR = "led_color";
     private static final String PREFERENCE_NOTIFICATION_OPENS_UNREAD = "notification_opens_unread";
     private static final String PREFERENCE_MESSAGE_AGE = "account_message_age";
-
+    private static final String PREFERENCE_QUOTE_PREFIX = "account_quote_prefix";
 
 
     private Account mAccount;
@@ -81,6 +81,7 @@ public class AccountSettings extends K9PreferenceActivity
     private Preference mLedColor;
     private boolean mIncomingChanged = false;
     private CheckBoxPreference mNotificationOpensUnread;
+    private EditTextPreference mAccountQuotePrefix;
 
 
     public static void actionSettings(Context context, Account account)
@@ -131,6 +132,20 @@ public class AccountSettings extends K9PreferenceActivity
             }
         });
 
+        mAccountQuotePrefix = (EditTextPreference) findPreference(PREFERENCE_QUOTE_PREFIX);
+        mAccountQuotePrefix.setSummary(mAccount.getQuotePrefix());
+        mAccountQuotePrefix.setText(mAccount.getQuotePrefix());
+        mAccountQuotePrefix.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener()
+        {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newValue)
+            {
+                final String value = newValue.toString();
+                mAccountQuotePrefix.setSummary(value);
+                mAccountQuotePrefix.setText(value);
+                return false;
+            }
+        });
 
         mCheckFrequency = (ListPreference) findPreference(PREFERENCE_FREQUENCY);
         mCheckFrequency.setValue(String.valueOf(mAccount.getAutomaticCheckIntervalMinutes()));
@@ -441,6 +456,7 @@ public class AccountSettings extends K9PreferenceActivity
         mAccount.setDeletePolicy(Integer.parseInt(mDeletePolicy.getValue()));
         mAccount.setExpungePolicy(mExpungePolicy.getValue());
         mAccount.setSearchableFolders(Account.Searchable.valueOf(mSearchableFolders.getValue()));
+        mAccount.setQuotePrefix(mAccountQuotePrefix.getText());
 
         boolean needsRefresh = mAccount.setAutomaticCheckIntervalMinutes(Integer.parseInt(mCheckFrequency.getValue()));
         needsRefresh |= mAccount.setFolderSyncMode(Account.FolderMode.valueOf(mSyncMode.getValue()));