feat: remote printer (#11231)

Signed-off-by: fufesou <linlong1266@gmail.com>

flutter/lib/models/file_model.dart

@@ -30,8 +30,15 @@ enum SortBy {
 class JobID {
   int _count = 0;
   int next() {
-    _count++;
-    return _count;
+    String v = bind.mainGetCommonSync(key: 'transfer-job-id');
+    try {
+      return int.parse(v);
+    } catch (e) {
+      // unreachable. But we still handle it to make it safe.
+      // If we return -1, we have to check it in the caller.
+      _count++;
+      return _count;
+    }
   }
 }
 

flutter/lib/models/model.dart

@@ -9,7 +9,6 @@ import 'package:desktop_multi_window/desktop_multi_window.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_hbb/common/widgets/peers_view.dart';
 import 'package:flutter_hbb/consts.dart';
 import 'package:flutter_hbb/models/ab_model.dart';
@@ -19,6 +18,7 @@ import 'package:flutter_hbb/models/file_model.dart';
 import 'package:flutter_hbb/models/group_model.dart';
 import 'package:flutter_hbb/models/peer_model.dart';
 import 'package:flutter_hbb/models/peer_tab_model.dart';
+import 'package:flutter_hbb/models/printer_model.dart';
 import 'package:flutter_hbb/models/server_model.dart';
 import 'package:flutter_hbb/models/user_model.dart';
 import 'package:flutter_hbb/models/state_model.dart';
@@ -412,12 +412,186 @@ class FfiModel with ChangeNotifier {
             isMobile) {
           parent.target?.recordingModel.updateStatus(evt['start'] == 'true');
         }
+      } else if (name == "printer_request") {
+        _handlePrinterRequest(evt, sessionId, peerId);
       } else {
         debugPrint('Event is not handled in the fixed branch: $name');
       }
     };
   }
 
+  _handlePrinterRequest(
+      Map<String, dynamic> evt, SessionID sessionId, String peerId) {
+    final id = evt['id'];
+    final path = evt['path'];
+    final dialogManager = parent.target!.dialogManager;
+    dialogManager.show((setState, close, context) {
+      PrinterOptions printerOptions = PrinterOptions.load();
+      final saveSettings = mainGetLocalBoolOptionSync(kKeyPrinterSave).obs;
+      final dontShowAgain = false.obs;
+      final Rx<String> selectedPrinterName = printerOptions.printerName.obs;
+      final printerNames = printerOptions.printerNames;
+      final defaultOrSelectedGroupValue =
+          (printerOptions.action == kValuePrinterIncomingJobDismiss
+                  ? kValuePrinterIncomingJobDefault
+                  : printerOptions.action)
+              .obs;
+
+      onRatioChanged(String? value) {
+        defaultOrSelectedGroupValue.value =
+            value ?? kValuePrinterIncomingJobDefault;
+      }
+
+      onSubmit() {
+        final printerName = defaultOrSelectedGroupValue.isEmpty
+            ? ''
+            : selectedPrinterName.value;
+        bind.sessionPrinterResponse(
+            sessionId: sessionId, id: id, path: path, printerName: printerName);
+        if (saveSettings.value || dontShowAgain.value) {
+          bind.mainSetLocalOption(key: kKeyPrinterSelected, value: printerName);
+          bind.mainSetLocalOption(
+              key: kKeyPrinterIncommingJobAction,
+              value: defaultOrSelectedGroupValue.value);
+        }
+        if (dontShowAgain.value) {
+          mainSetLocalBoolOption(kKeyPrinterAllowAutoPrint, true);
+        }
+        close();
+      }
+
+      onCancel() {
+        if (dontShowAgain.value) {
+          bind.mainSetLocalOption(
+              key: kKeyPrinterIncommingJobAction,
+              value: kValuePrinterIncomingJobDismiss);
+        }
+        close();
+      }
+
+      final printerItemHeight = 30.0;
+      final selectionAreaHeight =
+          printerItemHeight * min(8.0, max(printerNames.length, 3.0));
+      final content = Column(
+        children: [
+          Text(translate('print-incoming-job-confirm-tip')),
+          Row(
+            children: [
+              Obx(() => Radio<String>(
+                  value: kValuePrinterIncomingJobDefault,
+                  groupValue: defaultOrSelectedGroupValue.value,
+                  onChanged: onRatioChanged)),
+              GestureDetector(
+                  child: Text(translate('use-the-default-printer-tip')),
+                  onTap: () => onRatioChanged(kValuePrinterIncomingJobDefault)),
+            ],
+          ),
+          Column(
+            children: [
+              Row(children: [
+                Obx(() => Radio<String>(
+                    value: kValuePrinterIncomingJobSelected,
+                    groupValue: defaultOrSelectedGroupValue.value,
+                    onChanged: onRatioChanged)),
+                GestureDetector(
+                    child: Text(translate('use-the-selected-printer-tip')),
+                    onTap: () =>
+                        onRatioChanged(kValuePrinterIncomingJobSelected)),
+              ]),
+              SizedBox(
+                height: selectionAreaHeight,
+                width: 500,
+                child: ListView.builder(
+                    itemBuilder: (context, index) {
+                      return Obx(() => GestureDetector(
+                            child: Container(
+                              decoration: BoxDecoration(
+                                color: selectedPrinterName.value ==
+                                        printerNames[index]
+                                    ? (defaultOrSelectedGroupValue.value ==
+                                            kValuePrinterIncomingJobSelected
+                                        ? MyTheme.button
+                                        : MyTheme.button.withOpacity(0.5))
+                                    : Theme.of(context).cardColor,
+                                borderRadius: BorderRadius.all(
+                                  Radius.circular(5.0),
+                                ),
+                              ),
+                              key: ValueKey(printerNames[index]),
+                              height: printerItemHeight,
+                              child: Align(
+                                alignment: Alignment.centerLeft,
+                                child: Padding(
+                                  padding: const EdgeInsets.only(left: 10.0),
+                                  child: Text(
+                                    printerNames[index],
+                                    style: TextStyle(fontSize: 14),
+                                  ),
+                                ),
+                              ),
+                            ),
+                            onTap: defaultOrSelectedGroupValue.value ==
+                                    kValuePrinterIncomingJobSelected
+                                ? () {
+                                    selectedPrinterName.value =
+                                        printerNames[index];
+                                  }
+                                : null,
+                          ));
+                    },
+                    itemCount: printerNames.length),
+              ),
+            ],
+          ),
+          Row(
+            children: [
+              Obx(() => Checkbox(
+                  value: saveSettings.value,
+                  onChanged: (value) {
+                    if (value != null) {
+                      saveSettings.value = value;
+                      mainSetLocalBoolOption(kKeyPrinterSave, value);
+                    }
+                  })),
+              GestureDetector(
+                  child: Text(translate('save-settings-tip')),
+                  onTap: () {
+                    saveSettings.value = !saveSettings.value;
+                    mainSetLocalBoolOption(kKeyPrinterSave, saveSettings.value);
+                  }),
+            ],
+          ),
+          Row(
+            children: [
+              Obx(() => Checkbox(
+                  value: dontShowAgain.value,
+                  onChanged: (value) {
+                    if (value != null) {
+                      dontShowAgain.value = value;
+                    }
+                  })),
+              GestureDetector(
+                  child: Text(translate('dont-show-again-tip')),
+                  onTap: () {
+                    dontShowAgain.value = !dontShowAgain.value;
+                  }),
+            ],
+          ),
+        ],
+      );
+      return CustomAlertDialog(
+        title: Text(translate('Incoming Print Job')),
+        content: content,
+        actions: [
+          dialogButton('OK', onPressed: onSubmit),
+          dialogButton('Cancel', onPressed: onCancel),
+        ],
+        onSubmit: onSubmit,
+        onCancel: onCancel,
+      );
+    });
+  }
+
   _handleUseTextureRender(
       Map<String, dynamic> evt, SessionID sessionId, String peerId) {
     parent.target?.imageModel.setUseTextureRender(evt['v'] == 'Y');

flutter/lib/models/native_model.dart

@@ -60,14 +60,14 @@ class PlatformFFI {
   }
 
   bool registerEventHandler(
-      String eventName, String handlerName, HandleEvent handler) {
+      String eventName, String handlerName, HandleEvent handler, {bool replace = false}) {
     debugPrint('registerEventHandler $eventName $handlerName');
     var handlers = _eventHandlers[eventName];
     if (handlers == null) {
       _eventHandlers[eventName] = {handlerName: handler};
       return true;
     } else {
-      if (handlers.containsKey(handlerName)) {
+      if (!replace && handlers.containsKey(handlerName)) {
         return false;
       } else {
         handlers[handlerName] = handler;

flutter/lib/models/printer_model.dart

@@ -0,0 +1,48 @@
+import 'package:flutter_hbb/common.dart';
+import 'package:flutter_hbb/consts.dart';
+import 'package:flutter_hbb/models/platform_model.dart';
+
+class PrinterOptions {
+  String action;
+  List<String> printerNames;
+  String printerName;
+
+  PrinterOptions(
+      {required this.action,
+      required this.printerNames,
+      required this.printerName});
+
+  static PrinterOptions load() {
+    var action = bind.mainGetLocalOption(key: kKeyPrinterIncommingJobAction);
+    if (![
+      kValuePrinterIncomingJobDismiss,
+      kValuePrinterIncomingJobDefault,
+      kValuePrinterIncomingJobSelected
+    ].contains(action)) {
+      action = kValuePrinterIncomingJobDefault;
+    }
+
+    final printerNames = getPrinterNames();
+    var selectedPrinterName = bind.mainGetLocalOption(key: kKeyPrinterSelected);
+    if (!printerNames.contains(selectedPrinterName)) {
+      if (action == kValuePrinterIncomingJobSelected) {
+        action = kValuePrinterIncomingJobDefault;
+        bind.mainSetLocalOption(
+            key: kKeyPrinterIncommingJobAction,
+            value: kValuePrinterIncomingJobDefault);
+        if (printerNames.isEmpty) {
+          selectedPrinterName = '';
+        } else {
+          selectedPrinterName = printerNames.first;
+        }
+        bind.mainSetLocalOption(
+            key: kKeyPrinterSelected, value: selectedPrinterName);
+      }
+    }
+
+    return PrinterOptions(
+        action: action,
+        printerNames: printerNames,
+        printerName: selectedPrinterName);
+  }
+}