desktop: responsive design for large and small screens

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/Resources.android.kt

@@ -50,4 +50,7 @@ actual fun screenWidth(): Dp = LocalConfiguration.current.screenWidthDp.dp
 
 actual fun desktopExpandWindowToWidth(width: Dp) {}
 
+@Composable
+actual fun allowToShowBackButtonInCenter(): Boolean = true
+
 actual fun isRtl(text: CharSequence): Boolean = BidiFormatter.getInstance().isRtl(text)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/App.kt

@@ -274,25 +274,43 @@ fun EndPartOfScreen() {
 
 @Composable
 fun DesktopScreen(settingsState: SettingsViewState) {
+  BoxWithConstraints {
     Box {
+      val maxWidth = this@BoxWithConstraints.maxWidth
       // 56.dp is a size of unused space of settings drawer
-    Box(Modifier.width(DEFAULT_START_MODAL_WIDTH + 56.dp)) {
+      val startMaxWidth = when {
-      StartPartOfScreen(settingsState)
+        maxWidth >= DEFAULT_START_MODAL_WIDTH + DEFAULT_MIN_CENTER_MODAL_WIDTH -> DEFAULT_START_MODAL_WIDTH + 56.dp
+        ChatModel.chatId.value == null && !ModalManager.center.hasModalsOpen() -> maxWidth
+        else -> DEFAULT_START_MODAL_WIDTH
       }
-    Box(Modifier.widthIn(max = DEFAULT_START_MODAL_WIDTH)) {
+      val startModalMaxWidth = when {
+        maxWidth >= DEFAULT_START_MODAL_WIDTH + DEFAULT_MIN_CENTER_MODAL_WIDTH -> DEFAULT_START_MODAL_WIDTH
+        ChatModel.chatId.value == null && !ModalManager.center.hasModalsOpen() -> maxWidth
+        else -> DEFAULT_START_MODAL_WIDTH
+      }
+      Box(Modifier.widthIn(max = startMaxWidth)) {
+        StartPartOfScreen(settingsState)
+        Box(Modifier.widthIn(max = startModalMaxWidth)) {
           ModalManager.start.showInView()
         }
-    Row(Modifier.padding(start = DEFAULT_START_MODAL_WIDTH).clipToBounds()) {
+      }
+      val centerMaxWidth = when {
+        maxWidth >= DEFAULT_START_MODAL_WIDTH + DEFAULT_MIN_CENTER_MODAL_WIDTH -> maxWidth - DEFAULT_START_MODAL_WIDTH
+        ChatModel.chatId.value != null || ModalManager.center.hasModalsOpen() -> maxOf(DEFAULT_START_MODAL_WIDTH, maxWidth) - 1.dp
+        else -> 0.dp
+      }
+      Row(Modifier.padding(start = maxOf(maxWidth - centerMaxWidth, 0.dp))) {
         Box(Modifier.widthIn(min = DEFAULT_MIN_CENTER_MODAL_WIDTH).weight(1f)) {
           CenterPartOfScreen()
         }
-      if (ModalManager.end.hasModalsOpen()) {
+        if (ModalManager.end.hasModalsOpen() && maxWidth >= DEFAULT_START_MODAL_WIDTH + DEFAULT_MIN_CENTER_MODAL_WIDTH + DEFAULT_END_MODAL_WIDTH) {
           VerticalDivider()
         }
-      Box(Modifier.widthIn(max = DEFAULT_END_MODAL_WIDTH).clipToBounds()) {
+        Box(Modifier.widthIn(max = if (centerMaxWidth < DEFAULT_MIN_CENTER_MODAL_WIDTH + DEFAULT_END_MODAL_WIDTH) centerMaxWidth else DEFAULT_END_MODAL_WIDTH).clipToBounds()) {
           EndPartOfScreen()
         }
       }
+    }
     val (userPickerState, scaffoldState, switchingUsers) = settingsState
     val scope = rememberCoroutineScope()
     if (scaffoldState.drawerState.isOpen) {
@@ -306,7 +324,9 @@ fun DesktopScreen(settingsState: SettingsViewState) {
           })
       )
     }
+    if (maxWidth >= DEFAULT_START_MODAL_WIDTH + DEFAULT_MIN_CENTER_MODAL_WIDTH) {
       VerticalDivider(Modifier.padding(start = DEFAULT_START_MODAL_WIDTH))
+    }
     UserPicker(chatModel, userPickerState, switchingUsers) {
       scope.launch { if (scaffoldState.drawerState.isOpen) scaffoldState.drawerState.close() else scaffoldState.drawerState.open() }
     }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Resources.kt

@@ -5,6 +5,7 @@ import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.Dp
+import chat.simplex.common.ui.theme.DEFAULT_MIN_CENTER_MODAL_WIDTH
 import com.russhwolf.settings.Settings
 import dev.icerock.moko.resources.StringResource
 
@@ -30,4 +31,7 @@ expect fun screenWidth(): Dp
 
 expect fun desktopExpandWindowToWidth(width: Dp)
 
+@Composable
+expect fun allowToShowBackButtonInCenter(): Boolean
+
 expect fun isRtl(text: CharSequence): Boolean

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ChatView.kt

@@ -474,7 +474,7 @@ fun ChatInfoToolbar(
       showSearch = false
     }
   }
-  if (appPlatform.isAndroid) {
+  if (allowToShowBackButtonInCenter()) {
     BackHandler(onBack = onBackClicked)
   }
   val barButtons = arrayListOf<@Composable RowScope.() -> Unit>()
@@ -534,7 +534,7 @@ fun ChatInfoToolbar(
   }
 
   DefaultTopAppBar(
-    navigationButton = { if (appPlatform.isAndroid || showSearch) { NavigationButtonBack(onBackClicked) }  },
+    navigationButton = { if (allowToShowBackButtonInCenter() || showSearch) { Box(Modifier.offset(y = 4.dp)) { NavigationButtonBack(onBackClicked) } }  },
     title = { ChatInfoToolbarTitle(chat.chatInfo) },
     onTitleClick = info,
     showSearch = showSearch,

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ChatListNavLinkView.kt

@@ -16,6 +16,7 @@ import androidx.compose.desktop.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import chat.simplex.common.model.*
+import chat.simplex.common.platform.*
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.chat.*
 import chat.simplex.common.views.chat.group.deleteGroupDialog
@@ -24,8 +25,6 @@ import chat.simplex.common.views.chat.item.InvalidJSONView
 import chat.simplex.common.views.chat.item.ItemAction
 import chat.simplex.common.views.helpers.*
 import chat.simplex.common.views.newchat.ContactConnectionInfoView
-import chat.simplex.common.platform.appPlatform
-import chat.simplex.common.platform.ntfManager
 import chat.simplex.res.MR
 import kotlinx.coroutines.delay
 import kotlinx.datetime.Clock
@@ -42,6 +41,7 @@ fun ChatListNavLinkView(chat: Chat, chatModel: ChatModel) {
     showMenu.value = false
     delay(500L)
   }
+  val showClose = allowToShowBackButtonInCenter()
   when (chat.chatInfo) {
     is ChatInfo.Direct -> {
       val contactNetworkStatus = chatModel.contactNetworkStatus(chat.chatInfo.contact)
@@ -75,7 +75,7 @@ fun ChatListNavLinkView(chat: Chat, chatModel: ChatModel) {
         click = {
           ModalManager.center.closeModals()
           ModalManager.end.closeModals()
-          ModalManager.center.showModalCloseable(true, showClose = appPlatform.isAndroid) { close ->
+          ModalManager.center.showModalCloseable(true, showClose = showClose) { close ->
             ContactConnectionInfoView(chatModel, chat.chatInfo.contactConnection.connReqInv, chat.chatInfo.contactConnection, false, close)
           }
         },
@@ -341,13 +341,14 @@ fun ContactRequestMenuItems(chatInfo: ChatInfo.ContactRequest, chatModel: ChatMo
 
 @Composable
 fun ContactConnectionMenuItems(chatInfo: ChatInfo.ContactConnection, chatModel: ChatModel, showMenu: MutableState<Boolean>) {
+  val showClose = allowToShowBackButtonInCenter()
   ItemAction(
     stringResource(MR.strings.set_contact_name),
     painterResource(MR.images.ic_edit),
     onClick = {
       ModalManager.center.closeModals()
       ModalManager.end.closeModals()
-      ModalManager.center.showModalCloseable(true, showClose = appPlatform.isAndroid) { close ->
+      ModalManager.center.showModalCloseable(true, showClose = showClose) { close ->
         ContactConnectionInfoView(chatModel, chatInfo.contactConnection.connReqInv, chatInfo.contactConnection, true, close)
       }
       showMenu.value = false

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ChatListView.kt

@@ -58,7 +58,7 @@ fun ChatListView(chatModel: ChatModel, settingsState: SettingsViewState, setPerf
       connectIfOpenedViaUri(url, chatModel)
     }
   }
-  val endPadding = if (appPlatform.isDesktop) 56.dp else 0.dp
+  val endPadding = if (appPlatform.isDesktop && !allowToShowBackButtonInCenter()) 56.dp else 0.dp
   var searchInList by rememberSaveable { mutableStateOf("") }
   val scope = rememberCoroutineScope()
   val (userPickerState, scaffoldState, switchingUsers ) = settingsState

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ShareListView.kt

@@ -18,8 +18,7 @@ import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.helpers.*
 import chat.simplex.common.model.Chat
 import chat.simplex.common.model.ChatModel
-import chat.simplex.common.platform.BackHandler
+import chat.simplex.common.platform.*
-import chat.simplex.common.platform.appPlatform
 import chat.simplex.res.MR
 import kotlinx.coroutines.flow.MutableStateFlow
 
@@ -27,7 +26,7 @@ import kotlinx.coroutines.flow.MutableStateFlow
 fun ShareListView(chatModel: ChatModel, settingsState: SettingsViewState, stopped: Boolean) {
   var searchInList by rememberSaveable { mutableStateOf("") }
   val (userPickerState, scaffoldState, switchingUsers) = settingsState
-  val endPadding = if (appPlatform.isDesktop) 56.dp else 0.dp
+  val endPadding = if (appPlatform.isDesktop && !allowToShowBackButtonInCenter()) 56.dp else 0.dp
   Scaffold(
     Modifier.padding(end = endPadding),
     scaffoldState = scaffoldState,

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/newchat/NewChatSheet.kt

@@ -96,7 +96,7 @@ private fun NewChatSheetLayout(
       }
     }
   }
-  val endPadding = if (appPlatform.isDesktop) 56.dp else 0.dp
+  val endPadding = if (appPlatform.isDesktop && !allowToShowBackButtonInCenter()) 56.dp else 0.dp
   val maxWidth = with(LocalDensity.current) { screenWidth() * density }
   Column(
     Modifier

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/usersettings/SetDeliveryReceiptsView.kt

@@ -73,7 +73,7 @@ private fun SetDeliveryReceiptsLayout(
   skip: () -> Unit,
   userCount: Int,
 ) {
-  val endPadding = if (appPlatform.isDesktop) 56.dp else 0.dp
+  val endPadding = if (appPlatform.isDesktop && !allowToShowBackButtonInCenter()) 56.dp else 0.dp
   Column(
     Modifier.fillMaxSize().verticalScroll(rememberScrollState()).padding(top = DEFAULT_PADDING, end = endPadding),
     horizontalAlignment = Alignment.CenterHorizontally,

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Resources.desktop.kt

@@ -6,6 +6,8 @@ import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.*
 import chat.simplex.common.simplexWindowState
+import chat.simplex.common.ui.theme.DEFAULT_MIN_CENTER_MODAL_WIDTH
+import chat.simplex.common.ui.theme.DEFAULT_START_MODAL_WIDTH
 import com.russhwolf.settings.*
 import dev.icerock.moko.resources.StringResource
 import dev.icerock.moko.resources.desc.desc
@@ -54,6 +56,9 @@ actual fun desktopExpandWindowToWidth(width: Dp) {
   simplexWindowState.windowState.size = simplexWindowState.windowState.size.copy(width = width)
 }
 
+@Composable
+actual fun allowToShowBackButtonInCenter(): Boolean = simplexWindowState.windowState.size.width < DEFAULT_START_MODAL_WIDTH + DEFAULT_MIN_CENTER_MODAL_WIDTH
+
 actual fun isRtl(text: CharSequence): Boolean {
   if (text.isEmpty()) return false
   return text.any { char ->