puzzles: refactor and resync with upstream

This brings puzzles up-to-date with upstream revision
2d333750272c3967cfd5cd3677572cddeaad5932, though certain changes made
by me, including cursor-only Untangle and some compilation fixes
remain. Upstream code has been moved to its separate subdirectory and
future syncs can be done by simply copying over the new sources.

Change-Id: Ia6506ca5f78c3627165ea6791d38db414ace0804

1 files changed, 22 insertions, 0 deletions

diff --git a/apps/plugins/puzzles/src/html/towers.html b/apps/plugins/puzzles/src/html/towers.html
new file mode 100644
index 0000000..a710e0a
--- /dev/null
+++ b/apps/plugins/puzzles/src/html/towers.html
@@ -0,0 +1,22 @@
+Towers
+<p>
+Fill in the grid with towers whose heights range from 1 to the grid
+size, so that every possible height appears exactly once in each row
+and column, and so that each clue around the edge counts the number
+of towers that are visible when looking into the grid from that
+direction. (Taller towers hide shorter ones behind them. So the
+sequence 2,1,4,3,5 would match a clue of 3 on the left, because the
+1 is hidden behind the 2 and the 3 is hidden behind the 4. On the
+right, it would match a clue of 1 because the 5 hides everything
+else.)
+<p>
+To place a tower, click in a square to select it, then type the
+desired height on the keyboard. To erase a tower, click to select a
+square and then press Backspace.
+<p>
+Right-click in a square and then type a number to add or remove the
+number as a pencil mark, indicating tower heights that you think
+<em>might</em> go in that square.
+<p>
+Left-click on a clue to mark it as done (grey it out). To unmark a
+clue as done, left-click on it again.
\ No newline at end of file