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javascript/sources/entry-common.js

@@ -0,0 +1,235 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+function patch(prototype, name, fn) {
+
+    let original = prototype[name];
+
+    prototype[name] = function (... args) {
+        return fn.call(this, original, ... args);
+    };
+
+}
+
+module.exports = function (bind, lib) {
+
+    let constants = Object.assign({
+
+        UNDEFINED: NaN
+
+    }, require(`./YGEnums`));
+
+    class Layout {
+
+        constructor(left, right, top, bottom, width, height) {
+
+            this.left = left;
+            this.right = right;
+
+            this.top = top;
+            this.bottom = bottom;
+
+            this.width = width;
+            this.height = height;
+
+        }
+
+        fromJS(expose) {
+
+            expose(this.left, this.right, this.top, this.bottom, this.width, this.height);
+
+        }
+
+        toString() {
+
+            return `<Layout#${this.left}:${this.right};${this.top}:${this.bottom};${this.width}:${this.height}>`;
+
+        }
+
+    }
+
+    class Size {
+
+        static fromJS({ width, height }) {
+
+            return new Size(width, height);
+
+        }
+
+        constructor(width, height) {
+
+            this.width = width;
+            this.height = height;
+
+        }
+
+        fromJS(expose) {
+
+            expose(this.width, this.height);
+
+        }
+
+        toString() {
+
+            return `<Size#${this.width}x${this.height}>`;
+
+        }
+
+    }
+
+    class Value {
+
+        constructor(unit, value) {
+
+            this.unit = unit;
+            this.value = value;
+
+        }
+
+        fromJS(expose) {
+
+            expose(this.unit, this.value);
+
+        }
+
+        toString() {
+
+            switch (this.unit) {
+
+                case constants.UNIT_PIXEL:
+                    return `${this.value}`;
+
+                case constants.UNIT_PERCENT:
+                    return `${this.value}%`;
+
+                default: {
+                    return `${this.value}?`;
+                }
+
+            }
+
+        }
+
+        valueOf() {
+
+            return this.value;
+
+        }
+
+    }
+
+    for (let fnName of [ `setPosition`, `setMargin`, `setFlexBasis`, `setWidth`, `setHeight`, `setMinWidth`, `setMinHeight`, `setMaxWidth`, `setMaxHeight`, `setPadding` ]) {
+
+        let methods = { [constants.UNIT_PIXEL]: lib.Node.prototype[fnName], [constants.UNIT_PERCENT]: lib.Node.prototype[`${fnName}Percent`] };
+
+        if (Object.keys(methods).some(method => methods[method] == null))
+            throw new Error(`Assertion failed; some unit derivates of ${fnName} seem missing`);
+
+        patch(lib.Node.prototype, fnName, function (original, ... args) {
+
+            // We patch all these functions to add support for the following calls:
+            // .setWidth(100) / .setWidth("100%") / .setWidth(.getWidth())
+
+            let value = args.pop();
+            let unit, asNumber;
+
+            if (value instanceof Value) {
+
+                unit = value.unit;
+                asNumber = value.valueOf();
+
+            } else {
+
+                unit = typeof value === `string` && value.endsWith(`%`) ? constants.UNIT_PERCENT : constants.UNIT_PIXEL;
+                asNumber = parseFloat(value);
+
+            }
+
+            return methods[unit].call(this, ... args, asNumber);
+
+        });
+
+    }
+
+    patch(lib.Node.prototype, `free`, function () {
+
+        // Since we handle the memory allocation ourselves (via lib.Node.create), we also need to handle the deallocation
+
+        lib.Node.destroy(this);
+
+    });
+
+    patch(lib.Node.prototype, `freeRecursive`, function () {
+
+        for (let t = 0, T = this.getChildCount(); t < T; ++t)
+            this.getChild(0).freeRecursive();
+
+        this.free();
+
+    });
+
+    patch(lib.Node.prototype, `setMeasureFunc`, function (original, measureFunc) {
+
+        // This patch is just a convenience patch, since it helps write more idiomatic source code (such as .setMeasureFunc(null))
+        // We also automatically convert the return value of the measureFunc to a Size object, so that we can return anything that has .width and .height properties
+
+        if (measureFunc) {
+            return original.call(this, (... args) => Size.fromJS(measureFunc(... args)));
+        } else {
+            return this.unsetMeasureFunc();
+        }
+
+    });
+
+    patch(lib.Node.prototype, `calculateLayout`, function (original, width = constants.UNDEFINED, height = constants.UNDEFINED, direction = constants.DIRECTION_LTR) {
+
+        // Just a small patch to add support for the function default parameters
+
+        return original.call(this, width, height, direction);
+
+    });
+
+    function setExperimentalFeatureEnabled(... args) {
+
+        return lib.setExperimentalFeatureEnabled(... args);
+
+    }
+
+    function isExperimentalFeatureEnabled(... args) {
+
+        return lib.isExperimentalFeatureEnabled(... args);
+
+    }
+
+    function getInstanceCount(... args) {
+
+        return lib.getInstanceCount(... args);
+
+    }
+
+    bind(`Layout`, Layout);
+    bind(`Size`, Size);
+    bind(`Value`, Value);
+
+    return Object.assign({
+
+        Node: lib.Node,
+
+        Layout,
+        Size,
+        Value,
+
+        setExperimentalFeatureEnabled,
+        isExperimentalFeatureEnabled,
+
+        getInstanceCount
+
+    }, constants);
+
+};