Navigation stack native primitives (#139)

Adds support for stack navigation primitives (UINavigationViewController and Android fragment container with back button support)

android/src/main/java/com/swmansion/rnscreens/ScreenStackHeaderConfigViewManager.java

@@ -0,0 +1,106 @@
+package com.swmansion.rnscreens;
+
+import android.view.View;
+
+import com.facebook.react.bridge.JSApplicationCausedNativeException;
+import com.facebook.react.module.annotations.ReactModule;
+import com.facebook.react.uimanager.PixelUtil;
+import com.facebook.react.uimanager.ThemedReactContext;
+import com.facebook.react.uimanager.ViewGroupManager;
+import com.facebook.react.uimanager.annotations.ReactProp;
+
+@ReactModule(name = ScreenStackHeaderConfigViewManager.REACT_CLASS)
+public class ScreenStackHeaderConfigViewManager extends ViewGroupManager<ScreenStackHeaderConfig> {
+
+  protected static final String REACT_CLASS = "RNSScreenStackHeaderConfig";
+
+  @Override
+  public String getName() {
+    return REACT_CLASS;
+  }
+
+  @Override
+  protected ScreenStackHeaderConfig createViewInstance(ThemedReactContext reactContext) {
+    return new ScreenStackHeaderConfig(reactContext);
+  }
+
+  @Override
+  public void addView(ScreenStackHeaderConfig parent, View child, int index) {
+    if (!(child instanceof ScreenStackHeaderSubview)) {
+      throw new JSApplicationCausedNativeException("Config children should be of type " + ScreenStackHeaderSubviewManager.REACT_CLASS);
+    }
+    parent.addConfigSubview((ScreenStackHeaderSubview) child, index);
+  }
+
+  @Override
+  public void removeViewAt(ScreenStackHeaderConfig parent, int index) {
+    parent.removeConfigSubview(index);
+  }
+
+  @Override
+  public int getChildCount(ScreenStackHeaderConfig parent) {
+    return parent.getConfigSubviewsCount();
+  }
+
+  @Override
+  public View getChildAt(ScreenStackHeaderConfig parent, int index) {
+    return parent.getConfigSubview(index);
+  }
+
+  @Override
+  public boolean needsCustomLayoutForChildren() {
+    return true;
+  }
+
+  @ReactProp(name = "title")
+  public void setTitle(ScreenStackHeaderConfig config, String title) {
+    config.setTitle(title);
+  }
+
+  @ReactProp(name = "titleFontFamily")
+  public void setTitleFontFamily(ScreenStackHeaderConfig config, String titleFontFamily) {
+    config.setTitleFontFamily(titleFontFamily);
+  }
+
+  @ReactProp(name = "titleFontSize")
+  public void setTitleFontSize(ScreenStackHeaderConfig config, double titleFontSizeSP) {
+    config.setTitleFontSize((int) PixelUtil.toPixelFromSP(titleFontSizeSP));
+  }
+
+  @ReactProp(name = "titleColor", customType = "Color")
+  public void setTitleColor(ScreenStackHeaderConfig config, int titleColor) {
+    config.setTitleColor(titleColor);
+  }
+
+  @ReactProp(name = "backgroundColor", customType = "Color")
+  public void setBackgroundColor(ScreenStackHeaderConfig config, int titleColor) {
+    config.setBackgroundColor(titleColor);
+  }
+
+  @ReactProp(name = "hideShadow")
+  public void setHideShadow(ScreenStackHeaderConfig config, boolean hideShadow) {
+    config.setHideShadow(hideShadow);
+  }
+
+  @ReactProp(name = "hideBackButton")
+  public void setHideBackButton(ScreenStackHeaderConfig config, boolean hideBackButton) {
+    config.setHideBackButton(hideBackButton);
+  }
+
+  @ReactProp(name = "color", customType = "Color")
+  public void setColor(ScreenStackHeaderConfig config, int color) {
+    config.setTintColor(color);
+  }
+
+  @ReactProp(name = "hidden")
+  public void setHidden(ScreenStackHeaderConfig config, boolean hidden) {
+    config.setHidden(hidden);
+  }
+
+
+//  RCT_EXPORT_VIEW_PROPERTY(backTitle, NSString)
+//  RCT_EXPORT_VIEW_PROPERTY(backTitleFontFamily, NSString)
+//  RCT_EXPORT_VIEW_PROPERTY(backTitleFontSize, NSString)
+//  // `hidden` is an UIView property, we need to use different name internally
+//  RCT_EXPORT_VIEW_PROPERTY(translucent, BOOL)
+}