Add Emscripten / WebAssembly build.

Requires Linux (or possibly MacOS X) and an installed emsdk to build.

1 files changed, 51 insertions, 0 deletions

diff --git a/platform/wasm/wrap.js b/platform/wasm/wrap.js
new file mode 100644
index 00000000..ef5df57b
--- /dev/null
+++ b/platform/wasm/wrap.js
@@ -0,0 +1,51 @@
+var mupdf = {};
+
+Module.noExitRuntime = true;
+Module.noInitialRun = true;
+
+Module.onRuntimeInitialized = function () {
+	Module.ccall('initContext');
+	mupdf.openDocument = Module.cwrap('openDocument', 'number', ['string']);
+	mupdf.freeDocument = Module.cwrap('freeDocument', 'null', ['number']);
+	mupdf.documentTitle = Module.cwrap('documentTitle', 'string', ['number']);
+	mupdf.countPages = Module.cwrap('countPages', 'number', ['number']);
+	mupdf.pageWidth = Module.cwrap('pageWidth', 'number', ['number', 'number', 'number']);
+	mupdf.pageHeight = Module.cwrap('pageHeight', 'number', ['number', 'number', 'number']);
+	mupdf.pageLinks = Module.cwrap('pageLinks', 'string', ['number', 'number', 'number']);
+	mupdf.drawPageAsPNG = Module.cwrap('drawPageAsPNG', 'string', ['number', 'number', 'number']);
+	mupdf.drawPageAsHTML = Module.cwrap('drawPageAsHTML', 'string', ['number', 'number']);
+	mupdf.drawPageAsSVG = Module.cwrap('drawPageAsSVG', 'string', ['number', 'number']);
+	mupdf.loadOutline = Module.cwrap('loadOutline', 'number', ['number']);
+	mupdf.freeOutline = Module.cwrap('freeOutline', null, ['number']);
+	mupdf.outlineTitle = Module.cwrap('outlineTitle', 'string', ['number']);
+	mupdf.outlinePage = Module.cwrap('outlinePage', 'number', ['number']);
+	mupdf.outlineDown = Module.cwrap('outlineDown', 'number', ['number']);
+	mupdf.outlineNext = Module.cwrap('outlineNext', 'number', ['number']);
+};
+
+mupdf.documentOutline = function (doc) {
+	function makeOutline(node) {
+		var ul = document.createElement('ul');
+		while (node) {
+			var li = document.createElement('li');
+			var a = document.createElement('a');
+			a.href = '#page' + mupdf.outlinePage(node);
+			a.textContent = mupdf.outlineTitle(node);
+			li.appendChild(a);
+			var down = mupdf.outlineDown(node);
+			if (down) {
+				li.appendChild(makeOutline(down));
+			}
+			ul.appendChild(li);
+			node = mupdf.outlineNext(node);
+		}
+		return ul;
+	}
+	var root = mupdf.loadOutline(doc);
+	if (root) {
+		var ul = makeOutline(root);
+		mupdf.freeOutline(root);
+		return ul;
+	}
+	return null;
+}