src/system/helpers.cpp: Add cutString() function

Origin commit data
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Branch: ni/coolstream
Commit: 71674d0f8a
Author: Michael Liebmann <tuxcode.bbg@gmail.com>
Date: 2016-08-12 (Fri, 12 Aug 2016)


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No further description and justification available within origin commit message!

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This commit was generated by Migit

src/system/helpers.cpp

@@ -438,6 +438,27 @@ std::string trim(std::string &str, const std::string &trimChars /*= " \n\r\t"*/)
 	return result.erase(0, result.find_first_not_of(trimChars));
 }
 
+std::string cutString(const std::string str, Font *msgFont, const int width)
+{
+	std::string ret = str;
+	ret = trim(ret);
+	int sw = msgFont->getRenderWidth(ret);
+	if (sw <= width)
+		return ret;
+	else {
+		std::string z = "...";
+		int zw = msgFont->getRenderWidth(z);
+		if (width <= 2*zw)
+			return ret;
+		do {
+			ret = ret.substr(0, ret.length()-1);
+			sw = msgFont->getRenderWidth(ret);
+		} while (sw+zw > width);
+		ret = trim(ret) + z;
+	}
+	return ret;
+}
+
 std::string strftime(const char *format, const struct tm *tm)
 {
 	char buf[4096];

src/system/helpers.h

@@ -37,6 +37,8 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
+#include <driver/fontrenderer.h>
+
 int my_system(const char * cmd);
 int my_system(int argc, const char *arg, ...); /* argc is number of arguments including command */
 
@@ -67,6 +69,7 @@ std::string getFileName(std::string &file);
 std::string getFileExt(std::string &file);
 std::string getNowTimeStr(const char* format);
 std::string trim(std::string &str, const std::string &trimChars = " \n\r\t");
+std::string cutString(const std::string str, Font *msgFont, const int width);
 std::string strftime(const char *format, const struct tm *tm);
 std::string strftime(const char *format, time_t when, bool gm = false);
 time_t toEpoch(std::string &date);