Add feature to Fluxbox window manager for Linux - window resizing by dragging borders

I need you to enhance FluxBox window manager for Linux. You will patch the existing source code (version 1.3.5) Currently fluxbox only allows resizing of windows by dragging grip elements which is at the bottom of the window (in left and right corner). I need you to extend this functionality, code support for window resizing when window border is dragged. Your task will be split into several sub-goals: goal 1: show proper resize-cursor when mouse is over the edge (window border). Show horizontal arrows (mouse cursor) when mouse is over left or right side of the window, show vertical arrows (mouse cursor) when mouse is over the very top or very bottom side of the window. If the mouse is over any corner, then mouse must show appropriate cursor too. Note, when user specifies zero-width border for windows, then we do not need to do anything. But when border is non-zero, then the entire border width/height must be supported. So, if border is 1px, then it will be hard for the user to 'catch' that to resize. It is his problem. If the border used by user is 5px, it will be easier. For corners, if the border is 5px, then the entire corner 5x5 pixels will be recognized as corner. Remember that user can configure any border in config. goal 2: when user clicks left mouse button while hovering over it and drags it, the window should resize in the correct direction. For example, if user drags left side, the window will resize in a way that the left side will enlarge/shorten, the rest of the window remains. Similarly, if the user drags top-right corner, then the window resizes appropriately. Use common sense here :) I cannot accept any partial solution, so you get paid only if you complete it fully. Your changes will be submitted for inclusion to FluxBox developers, so please keep it small, simple, and easily understandable. If you have questions, feel free to PM me. Thank you