// The undo and redo buttons. Used by js_enable_undo_redo().
var undo_button, redo_button;
-// Helper function which is passed a mouse event object and a DOM
-// element, and returns the coordinates of the mouse event relative to
-// the top left corner of the element by iterating upwards through the
-// DOM finding each element's offset from its parent, and thus
-// calculating the page-relative position of the target element so
-// that we can subtract that from event.page{X,Y}.
-function relative_mouse_coords(event, element) {
+// A div element enclosing both the puzzle and its status bar, used
+// for positioning the resize handle.
+var resizable_div;
+
+// Helper function to find the absolute position of a given DOM
+// element on a page, by iterating upwards through the DOM finding
+// each element's offset from its parent, and thus calculating the
+// page-relative position of the target element.
+function element_coords(element) {
var ex = 0, ey = 0;
while (element.offsetParent) {
ex += element.offsetLeft;
ey += element.offsetTop;
element = element.offsetParent;
}
- return {x: event.pageX - ex,
- y: event.pageY - ey};
+ return {x: ex, y:ey};
+}
+
+// Helper function which is passed a mouse event object and a DOM
+// element, and returns the coordinates of the mouse event relative to
+// the top left corner of the element by subtracting element_coords
+// from event.page{X,Y}.
+function relative_mouse_coords(event, element) {
+ var ecoords = element_coords(element);
+ return {x: event.pageX - ecoords.x,
+ y: event.pageY - ecoords.y};
}
// Init function called from body.onload.
// Default to giving keyboard focus to the puzzle.
onscreen_canvas.focus();
+ // Create the resize handle.
+ var resize_handle = document.createElement("canvas");
+ resize_handle.width = 10;
+ resize_handle.height = 10;
+ {
+ var ctx = resize_handle.getContext("2d");
+ ctx.beginPath();
+ for (var i = 1; i <= 7; i += 3) {
+ ctx.moveTo(8.5, i + 0.5);
+ ctx.lineTo(i + 0.5, 8.5);
+ }
+ ctx.lineWidth = '1px';
+ ctx.lineCap = 'round';
+ ctx.lineJoin = 'round';
+ ctx.strokeStyle = '#000000';
+ ctx.stroke();
+ }
+ resizable_div = document.getElementById("resizable");
+ resizable_div.appendChild(resize_handle);
+ resize_handle.style.position = 'absolute';
+ resize_handle.style.zIndex = 98;
+ resize_handle.style.bottom = "0";
+ resize_handle.style.right = "0";
+ resize_handle.style.cursor = "se-resize";
+ resize_handle.title = "Drag to resize the puzzle. Right-click to restore the default size.";
+ var resize_xbase = null, resize_ybase = null, restore_pending = false;
+ var resize_xoffset = null, resize_yoffset = null;
+ var resize_puzzle = Module.cwrap('resize_puzzle',
+ 'void', ['number', 'number']);
+ var restore_puzzle_size = Module.cwrap('restore_puzzle_size', 'void', []);
+ resize_handle.oncontextmenu = function(event) { return false; }
+ resize_handle.onmousedown = function(event) {
+ if (event.button == 0) {
+ var xy = element_coords(onscreen_canvas);
+ resize_xbase = xy.x + onscreen_canvas.width / 2;
+ resize_ybase = xy.y;
+ resize_xoffset = xy.x + onscreen_canvas.width - event.pageX;
+ resize_yoffset = xy.y + onscreen_canvas.height - event.pageY;
+ } else {
+ restore_pending = true;
+ }
+ resize_handle.setCapture(true);
+ event.preventDefault();
+ };
+ window.addEventListener("mousemove", function(event) {
+ if (resize_xbase !== null && resize_ybase !== null) {
+ resize_puzzle((event.pageX + resize_xoffset - resize_xbase) * 2,
+ (event.pageY + resize_yoffset - resize_ybase));
+ event.preventDefault();
+ // Chrome insists on selecting text during a resize drag
+ // no matter what I do
+ if (window.getSelection)
+ window.getSelection().removeAllRanges();
+ else
+ document.selection.empty(); }
+ });
+ window.addEventListener("mouseup", function(event) {
+ if (resize_xbase !== null && resize_ybase !== null) {
+ resize_xbase = null;
+ resize_ybase = null;
+ onscreen_canvas.focus(); // return focus to the puzzle
+ event.preventDefault();
+ } else if (restore_pending) {
+ // If you have the puzzle at larger than normal size and
+ // then right-click to restore, I haven't found any way to
+ // stop Chrome and IE popping up a context menu on the
+ // revealed piece of document when you release the button
+ // except by putting the actual restore into a setTimeout.
+ // Gah.
+ setTimeout(function() {
+ restore_pending = false;
+ restore_puzzle_size();
+ onscreen_canvas.focus();
+ }, 20);
+ event.preventDefault();
+ }
+ });
+
// Run the C setup function, passing argv[1] as the fragment
// identifier (so that permalinks of the form puzzle.html#game-id
// can launch the specified id).
- Module.arguments = [location.hash];
- Module.run();
+ Module.callMain([location.hash]);
// And if we get here with everything having gone smoothly, i.e.
// we haven't crashed for one reason or another during setup, then
~ian / sgt-puzzles.git / blobdiff