Composition and decomposition text controls are multiline now + they synchronize text selection.

lib/libZRCola/src/mapping.cpp

@@ -0,0 +1,70 @@
+/*
+    Copyright 2015-2016 Amebis
+
+    This file is part of ZRCola.
+
+    ZRCola is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    ZRCola is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with ZRCola. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "stdafx.h"
+
+
+size_t ZRCola::mapping_vector::to_composed(_In_ size_t decmp) const
+{
+    for (size_type l = 0, r = size();;) {
+        if (l < r) {
+            size_type m = (l + r) / 2;
+            const mapping &el = (*this)[m];
+
+                 if (decmp < el.decmp) r = m;
+            else if (el.decmp < decmp) l = m + 1;
+            else {
+                // An exact match found.
+                return el.cmp;
+            }
+        } else if (l) {
+            // We found a map interval.
+            const mapping &el = (*this)[l - 1];
+            return el.cmp + (decmp - el.decmp);
+        } else {
+            // The decomposed character index is far left.
+            return decmp;
+        }
+    }
+}
+
+
+size_t ZRCola::mapping_vector::to_decomposed(_In_ size_t cmp) const
+{
+    for (size_type l = 0, r = size();;) {
+        if (l < r) {
+            size_type m = (l + r) / 2;
+            const mapping &el = (*this)[m];
+
+                 if (cmp < el.cmp) r = m;
+            else if (el.cmp < cmp) l = m + 1;
+            else {
+                // An exact match found.
+                return el.decmp;
+            }
+        } else if (l) {
+            // We found a map interval.
+            const mapping &el = (*this)[l - 1];
+            return el.decmp + (cmp - el.cmp);
+        } else {
+            // The composed character index is far left.
+            return cmp;
+        }
+    }
+}