1 files changed, 76 insertions, 0 deletions
diff --git a/js/lib/ui.avatar_cropper.js b/js/lib/ui.avatar_cropper.js
new file mode 100644
index 000000000..fc32a0832
--- /dev/null
+++ b/js/lib/ui.avatar_cropper.js
@@ -0,0 +1,76 @@
+/**
+ * Avatar cropping
+ */
+
+elgg.provide('elgg.avatarCropper');
+
+/**
+ * Register the avatar cropper.
+ *
+ * If the hidden inputs have the coordinates from a previous cropping, begin
+ * the selection and preview with that displayed.
+ */
+elgg.avatarCropper.init = function() {
+	var params = {
+		selectionOpacity: 0,
+		aspectRatio: '1:1',
+		onSelectEnd: elgg.avatarCropper.selectChange,
+		onSelectChange: elgg.avatarCropper.preview
+	};
+
+	if ($('input[name=x2]').val()) {
+		params.x1 = $('input[name=x1]').val();
+		params.x2 = $('input[name=x2]').val();
+		params.y1 = $('input[name=y1]').val();
+		params.y2 = $('input[name=y2]').val();
+	}
+
+	$('#user-avatar-cropper').imgAreaSelect(params);
+
+	if ($('input[name=x2]').val()) {
+		var ias = $('#user-avatar-cropper').imgAreaSelect({instance: true});
+		var selection = ias.getSelection();
+		elgg.avatarCropper.preview($('#user-avatar-cropper'), selection);
+	}
+};
+
+/**
+ * Handler for changing select area.
+ *
+ * @param {Object} reference to the image
+ * @param {Object} imgareaselect selection object
+ * @return void
+ */
+elgg.avatarCropper.preview = function(img, selection) {
+	// catch for the first click on the image
+	if (selection.width == 0 || selection.height == 0) {
+		return;
+	}
+
+	var origWidth = $("#user-avatar-cropper").width();
+	var origHeight = $("#user-avatar-cropper").height();
+	var scaleX = 100 / selection.width;
+	var scaleY = 100 / selection.height;
+	$('#user-avatar-preview > img').css({
+		width: Math.round(scaleX * origWidth) + 'px',
+		height: Math.round(scaleY * origHeight) + 'px',
+		marginLeft: '-' + Math.round(scaleX * selection.x1) + 'px',
+		marginTop: '-' + Math.round(scaleY * selection.y1) + 'px'
+	});
+};
+
+/**
+ * Handler for updating the form inputs after select ends
+ *
+ * @param {Object} reference to the image
+ * @param {Object} imgareaselect selection object
+ * @return void
+ */
+elgg.avatarCropper.selectChange = function(img, selection) {
+	$('input[name=x1]').val(selection.x1);
+	$('input[name=x2]').val(selection.x2);
+	$('input[name=y1]').val(selection.y1);
+	$('input[name=y2]').val(selection.y2);
+};
+
+elgg.register_hook_handler('init', 'system', elgg.avatarCropper.init);
+\ No newline at end of file