New navigation model (#1)

* Flatten all routing into a single stack

* Replace router with custom implementation

* Add shell header and titles

* Add tab selector

* Add back/forward history menus on longpress

* Fix: don't modify state during render

* Add refresh() to navigation and reroute navigations to the current location to refresh instead of add to history

* Cache screens during navigation to maintain scroll position and improve load-time for renders

src/view/shell/mobile/tabs-selector.tsx

@@ -0,0 +1,158 @@
+import React, {forwardRef, useState, useImperativeHandle, useRef} from 'react'
+import {StyleSheet, Text, TouchableWithoutFeedback, View} from 'react-native'
+import BottomSheet from '@gorhom/bottom-sheet'
+import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
+import {s} from '../../lib/styles'
+import {NavigationTabModel} from '../../../state/models/navigation'
+import {createCustomBackdrop} from '../../com/util/BottomSheetCustomBackdrop'
+import {match} from '../../routes'
+
+const TAB_HEIGHT = 38
+const TAB_SPACING = 5
+const BOTTOM_MARGIN = 70
+
+export const TabsSelectorModal = forwardRef(function TabsSelectorModal(
+  {
+    onNewTab,
+    onChangeTab,
+    onCloseTab,
+    tabs,
+    currentTabIndex,
+  }: {
+    onNewTab: () => void
+    onChangeTab: (tabIndex: number) => void
+    onCloseTab: (tabIndex: number) => void
+    tabs: NavigationTabModel[]
+    currentTabIndex: number
+  },
+  ref,
+) {
+  const [isOpen, setIsOpen] = useState<boolean>(false)
+  const [snapPoints, setSnapPoints] = useState<number[]>([100])
+  const bottomSheetRef = useRef<BottomSheet>(null)
+
+  useImperativeHandle(ref, () => ({
+    open() {
+      setIsOpen(true)
+      setSnapPoints([
+        (tabs.length + 1) * (TAB_HEIGHT + TAB_SPACING) + BOTTOM_MARGIN,
+      ])
+      bottomSheetRef.current?.expand()
+    },
+  }))
+
+  const onShareBottomSheetChange = (snapPoint: number) => {
+    if (snapPoint === -1) {
+      setIsOpen(false)
+    }
+  }
+  const onPressNewTab = () => {
+    onNewTab()
+    onClose()
+  }
+  const onPressChangeTab = (tabIndex: number) => {
+    onChangeTab(tabIndex)
+    onClose()
+  }
+  const onClose = () => {
+    setIsOpen(false)
+    bottomSheetRef.current?.close()
+  }
+  return (
+    <BottomSheet
+      ref={bottomSheetRef}
+      index={-1}
+      snapPoints={snapPoints}
+      enablePanDownToClose
+      backdropComponent={isOpen ? createCustomBackdrop(onClose) : undefined}
+      onChange={onShareBottomSheetChange}>
+      <View style={s.p10}>
+        {tabs.map((tab, tabIndex) => {
+          const {icon} = match(tab.current.url)
+          const isActive = tabIndex === currentTabIndex
+          return (
+            <View
+              key={tabIndex}
+              style={[styles.tab, styles.existing, isActive && styles.active]}>
+              <TouchableWithoutFeedback
+                onPress={() => onPressChangeTab(tabIndex)}>
+                <View style={styles.tabIcon}>
+                  <FontAwesomeIcon size={16} icon={icon} />
+                </View>
+              </TouchableWithoutFeedback>
+              <TouchableWithoutFeedback
+                onPress={() => onPressChangeTab(tabIndex)}>
+                <Text
+                  style={[styles.tabText, isActive && styles.tabTextActive]}>
+                  {tab.current.title || tab.current.url}
+                </Text>
+              </TouchableWithoutFeedback>
+              <TouchableWithoutFeedback onPress={() => onCloseTab(tabIndex)}>
+                <View style={styles.tabClose}>
+                  <FontAwesomeIcon
+                    size={16}
+                    icon="x"
+                    style={styles.tabCloseIcon}
+                  />
+                </View>
+              </TouchableWithoutFeedback>
+            </View>
+          )
+        })}
+        <TouchableWithoutFeedback onPress={onPressNewTab}>
+          <View style={[styles.tab, styles.create]}>
+            <View style={styles.tabIcon}>
+              <FontAwesomeIcon size={16} icon="plus" />
+            </View>
+            <Text style={styles.tabText}>New tab</Text>
+          </View>
+        </TouchableWithoutFeedback>
+      </View>
+    </BottomSheet>
+  )
+})
+
+const styles = StyleSheet.create({
+  tab: {
+    flexDirection: 'row',
+    width: '100%',
+    borderRadius: 4,
+    height: TAB_HEIGHT,
+    marginBottom: TAB_SPACING,
+  },
+  existing: {
+    borderColor: '#000',
+    borderWidth: 1,
+  },
+  create: {
+    backgroundColor: '#F8F3F3',
+  },
+  active: {
+    backgroundColor: '#faf0f0',
+    borderColor: '#f00',
+    borderWidth: 1,
+  },
+  tabIcon: {
+    paddingTop: 10,
+    paddingBottom: 10,
+    paddingLeft: 15,
+    paddingRight: 10,
+  },
+  tabText: {
+    flex: 1,
+    paddingTop: 10,
+    paddingBottom: 10,
+  },
+  tabTextActive: {
+    fontWeight: 'bold',
+  },
+  tabClose: {
+    paddingTop: 10,
+    paddingBottom: 10,
+    paddingLeft: 10,
+    paddingRight: 15,
+  },
+  tabCloseIcon: {
+    color: '#655',
+  },
+})