Improve input box text handling

Change-Id: I79cfaac1adf85d1ee5514bf5266930823c1a15ff

gui/text.cpp

@@ -1,3 +1,21 @@
+/*
+        Copyright 2012 to 2016 bigbiff/Dees_Troy TeamWin
+        This file is part of TWRP/TeamWin Recovery Project.
+
+        TWRP 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.
+
+        TWRP 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 TWRP.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 // text.cpp - GUIText object
 
 #include <stdarg.h>
@@ -33,7 +51,6 @@ GUIText::GUIText(xml_node<>* node)
 	mVarChanged = 0;
 	mFontHeight = 0;
 	maxWidth = 0;
-	charSkip = 0;
 	scaleWidth = true;
 	isHighlighted = false;
 	mText = "";
@@ -94,22 +111,18 @@ int GUIText::Render(void)
 		return -1;
 
 	mLastValue = gui_parse_text(mText);
-	string displayValue = mLastValue;
-
-	if (charSkip)
-		displayValue.erase(0, charSkip);
 
 	mVarChanged = 0;
 
 	int x = mRenderX, y = mRenderY;
-	int width = gr_ttf_measureEx(displayValue.c_str(), fontResource);
+	int width = gr_ttf_measureEx(mLastValue.c_str(), fontResource);
 
 	if (isHighlighted)
 		gr_color(mHighlightColor.red, mHighlightColor.green, mHighlightColor.blue, mHighlightColor.alpha);
 	else
 		gr_color(mColor.red, mColor.green, mColor.blue, mColor.alpha);
 
-	gr_textEx_scaleW(mRenderX, mRenderY, displayValue.c_str(), fontResource, maxWidth, mPlacement, scaleWidth);
+	gr_textEx_scaleW(mRenderX, mRenderY, mLastValue.c_str(), fontResource, maxWidth, mPlacement, scaleWidth);
 
 	return 0;
 }
@@ -164,13 +177,13 @@ int GUIText::NotifyVarChange(const std::string& varName, const std::string& valu
 int GUIText::SetMaxWidth(unsigned width)
 {
 	maxWidth = width;
+	if (!maxWidth)
+		scaleWidth = false;
 	mVarChanged = 1;
 	return 0;
 }
 
-int GUIText::SkipCharCount(unsigned skip)
+void GUIText::SetText(string newtext)
 {
-	charSkip = skip;
-	mVarChanged = 1;
-	return 0;
+	mText = newtext;
 }