X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Fwindows.h;h=a8783fe2563ea1497afe7994378f723e8f18ac53;hb=5d9d7aa938af854c1c177e9ca77038d5f7dc2609;hp=d894fd28e5178f15ce6c42aea82ffb215ddda341;hpb=9b4365470d74903c6c5e78a964cf11cd64e5f839;p=plomrogue

diff --git a/src/windows.h b/src/windows.h
index d894fd2..a8783fe 100644
--- a/src/windows.h
+++ b/src/windows.h
@@ -9,7 +9,8 @@
  *
  * Windows can be almost any width (number has to fit into 16 bits); the virtual
  * screen grows with them as needed -- but only horizontally and only up to 2^16
- * cells. Their height is limited by the height of the terminal screen.
+ * cells. Their height is limited by the height of the terminal screen, which
+ * must also fit into 2^16 cells.
  *
  * Positioning of windows can only indirectly be influenced: by resizing them,
  * and by shifting their relative position inside the (currently invisible)
@@ -22,7 +23,9 @@
  * Functions that return uint8_t return these error codes:
  * 0 - success
  * 1 - memory allocation error (of ncurses' pads/windows, or scroll hint texts)
- * 2 - activity forces virtual screen to grow beyond width of 2^16 cells
+ * 2 - would force virtual screen to grow beyond width or height of 2^16 cells
+ *
+ * TODO: Expose less internals to the API.
  *
  * TODO: Think up a more intuitive window positioning algorithm or at least make
  * the chain that windows are positioned by visible.
@@ -87,25 +90,25 @@ struct WinMeta
 
 
 
-/* Initialize empty WinMeta "wmeta" on the terminal "screen". Note that
- * emptiness is marked by WinMeta.chain_start=0. Other struct values are also
- * initialized 0, except for the virtual screen (terminal screen height, width =
- * 1) and its terminal-sized frame.
+/* Initialize empty WinMeta "wmeta" on the terminal "screen". (Note that
+ * emptiness is marked by WinMeta.chain_start=0.) Other struct members are also
+ * initialized 0, except for the virtual screen (height = that of the terminal
+ * screen; width = 1) amd its frame sized to the size of the terminal screen.
  */
 extern uint8_t init_win_meta(WINDOW * screen, struct WinMeta * wmeta);
 
 
 
-/* Create a window below inside "wmeta" titled "title" of "height" and "width"
+/* Create a window as child of "wmeta" titled "title" of "height" and "width"
  * and appointing "func"() to interpret and draw the content stored at "data"
  * if the window is visible.
  *
- * A value for "width" <1 will trigger a fallback to width=1. A "height" <1 or
+ * A value for "width" <1 will trigger a fallback to width=1. A "height" < 1 or
  * larger than the maximum window height possible within the virtual screen will
  * trigger a fallback to the maximum height possible (i.e. pass a "height" of 0
  * to initialize the window to its largest possible height).
  *
- * Other values of the Win struct will be initialized to 0. The window will stay
+ * Other members of the Win struct are initialized to 0. The window will stay
  * invisible until appended to the chain of visible windows via append_win().
  */
 extern struct Win init_win(struct WinMeta * wmeta, char * title,
@@ -114,7 +117,7 @@ extern struct Win init_win(struct WinMeta * wmeta, char * title,
 
 
 
-/* Append/suspend window "w" to/from chain of visible windows in "wmeta".
+/* Append/suspend window "w" to/from chain of visible windows below "wmeta".
  * Appended windows will become active. Suspended active windows will move the
  * active window selection to their successor in the window chain or, failing
  * that, their predecessor; if no window remains, none will be active.
@@ -136,21 +139,24 @@ extern void reset_pad_offset(struct WinMeta * wmeta, uint16_t new_offset);
 
 /* Apply new size "size" to the active window, but only if it provides for at
  * least one cell width/height and is in height at least one cell smaller than
- * the screen's vertical height (to provide space for the title bar).
+ * the screen's vertical height (to provide space for the title bar). Does
+ * nothing if no window is active.
  */
 extern uint8_t resize_active_win(struct WinMeta * wmeta, struct yx_uint16 size);
 
 
 
-/* Cycle active window selection forwards (set dir="n") or backwards. Wrap
- * around in the windows chain if start / end of it is met.
+/* Cycle active window selection forwards ("dir" == "f") or backwards (any
+ * other "dir"). Wrap around in the windows chain if start / end of it is met.
+ * Does nothing if no window is active.
  */
 extern void cycle_active_win(struct WinMeta * wmeta, char dir);
 
 
 
-/* Move active window forwards (set dir="f") or backwards (set dir="b"). Wrap
- * around in the window chain if start / end of it is met.
+/* Move active window forwards ("dir" == "f") or backwards (any other "dir").
+ * Wrap around in the window chain if start / end of it is met. Does nothing if
+ * no window is active.
  */
 extern uint8_t shift_active_win(struct WinMeta * wmeta, char dir);