Added string manipulation routines. Added tree sorting.

Makefile

@@ -22,7 +22,7 @@ OBJECTS = $(SOURCES:$(SRC_PATH)/%.$(SRC_EXT)=$(BUILD_PATH)/%.o)
 DEPS = $(OBJECTS:.o=.d)
 
 # flags #
-COMPILE_FLAGS = -Wall -Wextra -g -std=gnu++0x
+COMPILE_FLAGS = -Wall -Wextra -std=gnu++0x -O3 # -g 
 INCLUDES = -I include/ -I /usr/local/include
 # Space-separated pkg-config libraries used by this project
 LIBS =

include/Display.hpp

@@ -2,6 +2,7 @@
 #define H_Display
 
 #include <iostream>
+#include <iomanip>
 #include <vector>
 #include <string>
 
@@ -24,6 +25,12 @@ class Display
         /// Sets the line i to str. /!\ Warning : the line will be truncated at its max length of Cols().
         void SetLine(unsigned int i, std::string const& str);
 
+        /// Sets the line i to str and centers it horizontally on the screen. /!\ Warning : the line will be truncated at its max length of Cols().
+        void SetLineCentered(unsigned int i, std::string const& str, char fillChar = ' ');
+
+        /// Sets the line i to str and justifies it to the right of the screen. /!\ Warning : the line will be truncated at its max length of Cols().
+        void SetLineRjustified(unsigned int i, std::string const& str, char fillChar = ' ');
+
         /// Get reference to "pixel" at row i, column j.
         char & GetPixel(unsigned int i, unsigned int j);
 
@@ -52,6 +59,15 @@ class Display
         std::vector<std::string> lines;//<! Stores the lines of the screen
 };
 
+/// Returns a left-justified string containing str, with fillChar used to fill the blank space : "bla", 7 -> "bla    ". If the string is longer than width, it is truncated.
+std::string LeftJustify(std::string const& str, unsigned int width, char fillChar = ' ');
+
+/// Returns a centered string containing str, with fillChar used to fill the blank space : "bla", 7 -> "  bla  ". If the string is longer than width, it is truncated.
+std::string CenterString(std::string const& str, unsigned int width, char fillChar = ' ');
+
+/// Returns a right-justified string containing str, with fillChar used to fill the blank space : "bla", 7 -> "    bla". If the string is longer than width, it is truncated.
+std::string RightJustify(std::string const& str, unsigned int width, char fillChar = ' ');
+
 /// Creates a progress bar
 std::string GenerateProgressBar(unsigned int width, unsigned int current, unsigned int total, bool showPercentage = true, std::string const& fillChar = "\u25A0");
 

include/TreeNodeDiskUsage.hpp

@@ -4,9 +4,12 @@
 #include <iostream>
 #include <string>
 #include <vector>
+#include <algorithm>
 #include <sys/stat.h>
 #include <dirent.h>
 
+#include <Display.hpp>
+
 #define PRINT_VAR(x); std::cout << #x << "\t= " << (x) << "\n"; 
 
 /// \struct PathFilters Stores the filters on paths.
@@ -27,7 +30,7 @@ class TreeNodeDiskUsage
 		bool MatchesFilter() const;
 		
 		/// Builds the whole tree
-		void BuildTree();
+		void BuildTree(bool verbose = false, unsigned int screenWidth = 80);
 		
 		/// Prints the tree to the standard output only including the names of the nodes
 		void PrintTree(unsigned int maxDepth = 0xFFFFFFFF, unsigned int depth = 0) const;
@@ -47,6 +50,17 @@ class TreeNodeDiskUsage
 		/// Returns the path of the node : /path/to/node.bla
 		std::string GetNodePath() const;
 
+		/// Sorts the children of the node by size in descending order. Non-recursive.
+		void SortBySizeDesc();
+
+		/// Sorts the children of the node by name in ascending order. Non-recursive.
+		void SortByNameAsc();
+
+		/// Operator used to sort the nodes by size in descending order. Returns true when a.totalSize > b.totalSize.
+		static bool SortOperatorSizeDesc(TreeNodeDiskUsage const& a, TreeNodeDiskUsage const& b);
+		/// Operator used to sort the nodes by size in descending order. Returns true when a.totalSize > b.totalSize.
+		static bool SortOperatorNameAsc(TreeNodeDiskUsage const& a, TreeNodeDiskUsage const& b);
+	
 	protected:
 		/// Cleans the path to remove double slashes, trailing slashes and leading and trailing whitespaces.
 		void SanitizePath();
@@ -74,6 +88,7 @@ class TreeNodeDiskUsage
 		bool isFolder;									//<! Indicates whether the node is a folder or a file.
 		size_t totalSize;								//<! Total size of the node, taking all children into account.
 		size_t totalSizeOnDisk;							//<! Total size of the node on the disk, taking all children into account.
+		size_t totalElements;							//<! Total number of elements within the node, taking all children into account.
 };
 
 #endif

src/Display.cpp

@@ -21,6 +21,9 @@ void Display::SetLine(unsigned int i, std::string const& str)
         lines[i] = str.substr(0, Cols());
 }
 
+void Display::SetLineCentered(unsigned int i, std::string const& str, char fillChar) { lines[i] = CenterString(str, Cols(), fillChar); }
+void Display::SetLineRjustified(unsigned int i, std::string const& str, char fillChar) { lines[i] = RightJustify(str, Cols(), fillChar); }
+
 char & Display::GetPixel(unsigned int i, unsigned int j) { return lines[i][j]; }
 
 void Display::ClearScreenLines()
@@ -67,6 +70,33 @@ winsize Display::GetTerminalSize()
 
 void Display::ClearScreen() { cout << "\033[2J\033[1;1H"; }
 
+std::string LeftJustify(std::string const& str, unsigned int width, char fillChar)
+{
+    if(str.size() <= width)
+        return str + std::string(width - str.size(), fillChar);
+    else
+        return str.substr(0, width);
+}
+
+std::string CenterString(std::string const& str, unsigned int width, char fillChar)
+{
+    if(str.size() <= width)
+    {
+        unsigned int freeSpace = (width - str.size())/2;
+        return std::string(freeSpace, fillChar) + str + std::string(freeSpace, fillChar);
+    }
+    else
+        return str.substr(0, width);
+}
+
+std::string RightJustify(std::string const& str, unsigned int width, char fillChar)
+{
+    if(str.size() <= width)
+        return std::string(width - str.size(), fillChar) + str;
+    else
+        return str.substr(0, width);
+}
+
 std::string GenerateProgressBar(unsigned int width, unsigned int current, unsigned int total, bool showPercentage, std::string const& fillChar)
 {
     std::string progressBar;

src/TreeNodeDiskUsage.cpp

@@ -5,7 +5,8 @@ TreeNodeDiskUsage::TreeNodeDiskUsage(std::string const& path_, PathFilters const
   path(path_),
   isFolder(false),
   totalSize(0),
-  totalSizeOnDisk(0)
+  totalSizeOnDisk(0),
+  totalElements(0)
 {
 	SanitizePath();
 }
@@ -29,7 +30,7 @@ bool TreeNodeDiskUsage::MatchesFilter() const
 	return true;// Temporary
 }
 
-void TreeNodeDiskUsage::BuildTree()
+void TreeNodeDiskUsage::BuildTree(bool verbose, unsigned int screenWidth)
 {
 	// Build the entire tree starting from the current node
 	
@@ -44,7 +45,8 @@ void TreeNodeDiskUsage::BuildTree()
 	if(stat(path.c_str(), &s) != 0)
 		return;
 	
-	std::cout << "BuildTree:path = " << path << "\n";// DEBUG
+	if(verbose)
+		std::cout << LeftJustify(path, screenWidth) << "\r";
 	
 	isFolder = (s.st_mode & S_IFMT) == S_IFDIR;// True if the path corresponds to a folder
 	//PRINT_VAR((s.st_mode & S_IFMT) == S_IFLNK);// symbolic link
@@ -54,6 +56,7 @@ void TreeNodeDiskUsage::BuildTree()
 	{
 		totalSize = s.st_size;
 		totalSizeOnDisk = s.st_blocks*512;// st_blocks is given in number of blocks of 512 bytes
+		totalElements = 1;
 	}
 	else
 	{
@@ -73,12 +76,12 @@ void TreeNodeDiskUsage::BuildTree()
 				{
 					// Recursively build the sub-tree
 					TreeNodeDiskUsage node(path + "/" + elementname, pathFilters);
-					node.BuildTree();
+					node.BuildTree(verbose);
 					totalSize += node.totalSize;
 					totalSizeOnDisk += node.totalSizeOnDisk;
+					totalElements += node.totalElements;
 					children.push_back(node);
 				}
-				//printf("%s\n", dir->d_name);
 			}
 			closedir(d);
 		}
@@ -90,10 +93,13 @@ void TreeNodeDiskUsage::PrintTree(unsigned int maxDepth, unsigned int depth) con
 	if(depth > maxDepth)
 		return;
 	
+	std::string paddedPath = path;
 	for(unsigned int i = 0 ; i < depth ; i++)
-		std::cout << "    ";
+		paddedPath = "    " + paddedPath;
-	//std::cout << path << "\n";
+	
-	std::cout << path << "\t" << totalSize << "\t" << totalSizeOnDisk << "\n";
+	unsigned int screenWidth = Display::GetTerminalSize().ws_col;
+	std::cout << std::setw(2*screenWidth/5) << std::left << paddedPath
+			  << std::setw(screenWidth/6) << std::right << totalSize << std::setw(screenWidth/6) << totalSizeOnDisk << std::setw(screenWidth/6) << totalElements << "\n";
 	if(isFolder)
 		for(unsigned int i = 0 ; i < children.size() ; i++)
 			children[i].PrintTree(maxDepth, depth+1);
@@ -124,6 +130,12 @@ std::string TreeNodeDiskUsage::GetNodeName() const
 	return path.substr(lastSepPos+1, path.size()-lastSepPos-1);
 }
 
+void TreeNodeDiskUsage::SortBySizeDesc() { std::sort(children.begin(), children.end(), TreeNodeDiskUsage::SortOperatorSizeDesc); }
+void TreeNodeDiskUsage::SortByNameAsc() { std::sort(children.begin(), children.end(), TreeNodeDiskUsage::SortOperatorNameAsc); }
+
+bool TreeNodeDiskUsage::SortOperatorSizeDesc(TreeNodeDiskUsage const& a, TreeNodeDiskUsage const& b) { return a.totalSize > b.totalSize; }
+bool TreeNodeDiskUsage::SortOperatorNameAsc(TreeNodeDiskUsage const& a, TreeNodeDiskUsage const& b) { return a.GetNodeName() < b.GetNodeName(); }
+
 void TreeNodeDiskUsage::SanitizePath()
 {
 	// Special cases handling

src/main.cpp

@@ -7,18 +7,44 @@ using std::cout;
 using std::cerr;
 using std::endl;
 
+//#define D_UNIT_TESTS
+
+#ifdef D_UNIT_TESTS
 void runTests(int argc, char *argv[]);
+#endif
 
 int main(int argc, char *argv[])
 {
-	if(argc > 1)
+	#ifdef D_UNIT_TESTS
 	runTests(argc, argv);
-	else
+	#else
-		cerr << "Error : No path given !\n";
 
+	std::string rootpath = ".";
+
+	// Parse arguments
+	if(argc > 1)
+	{
+		rootpath = argv[1];
+	}
+
+	Display display;
+
+	// Scan root path
+	TreeNodeDiskUsage tree(rootpath);
+	cout << "Scanning folder \"" << rootpath << "\" ...\n";
+	tree.BuildTree(true, display.Cols());
+	cout << endl;
+
+	// DEBUG
+	tree.PrintTree(1);
+	tree.SortBySizeDesc(); tree.PrintTree(1);
+	tree.SortByNameAsc(); tree.PrintTree(1);
+	
+	#endif // D_UNIT_TESTS
 	return 0;
 }
 
+#ifdef D_UNIT_TESTS
 void runTests(int /* argc */, char *argv[])
 {
 	if(0)
@@ -144,6 +170,9 @@ void runTests(int /* argc */, char *argv[])
 		d.SetLine(11, "------------------------- Inverted -------------------------");
 		d.HighlightLine(11, true);
 		d.SetLine(12, "        That's normal, bro.                               Really !");
+		d.SetLineCentered(13, "Bonjour tout le monde.");
+		d.SetLineCentered(14, "Tralala c'est moi la pute.", '-');
+		d.SetLineRjustified(15, "Tralala c'est moi la pute, mais a droite de l'ecran.", '-');
 		
 		Display::ClearScreen();
 		d.DrawScreenLines();
@@ -189,3 +218,4 @@ void runTests(int /* argc */, char *argv[])
 		}
 	}
 }
+#endif // D_UNIT_TESTS