[apps/shared] Share PadWithSpaces method

apps/shared/text_helpers.cpp

@@ -0,0 +1,25 @@
+#include "text_helpers.h"
+#include <ion/unicode/utf8_decoder.h>
+#include <ion/unicode/utf8_helper.h>
+#include <assert.h>
+
+namespace Shared {
+namespace TextHelpers {
+
+void PadWithSpaces(char * buffer, int bufferSize, int * currentNumberOfChar, int maxGlyphLengthWithPadding) {
+  assert(*currentNumberOfChar <= bufferSize);
+  size_t currentGlyphLength = UTF8Helper::StringGlyphLength(buffer, *currentNumberOfChar);
+  bool addedPadding = false;
+  assert(UTF8Decoder::CharSizeOfCodePoint(' ') == 1);
+  while (currentGlyphLength < maxGlyphLengthWithPadding && *currentNumberOfChar < bufferSize) {
+    *currentNumberOfChar = *currentNumberOfChar + UTF8Decoder::CodePointToChars(' ', buffer + *currentNumberOfChar, bufferSize - *currentNumberOfChar);
+    addedPadding = true;
+    currentGlyphLength++;
+  }
+  if (addedPadding) {
+    buffer[*currentNumberOfChar-1] = 0;
+  }
+}
+
+}
+}