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rewrite file api

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lifegpc
2024-01-22 18:47:19 +08:00
parent 2fa1eaacef
commit 747314da07
2 changed files with 105 additions and 107 deletions
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41
lib/platform/path.dart
View File

@@ -31,38 +31,57 @@ class Path {
return _currentExe;
}
/// 保存文件
Future<void> saveFile(
String filenameWithoutExtension, String mimeType, Uint8List bytes,
{String dir = ""}) async {
{String dir = "", bool saveAs = true}) async {
if (kIsWeb) {
return saveFileWeb(bytes, mimeType, filenameWithoutExtension);
}
return _safChannel.invokeMethod(
"saveFile", [filenameWithoutExtension, dir, mimeType, bytes]);
final f = await openFile(filenameWithoutExtension, mimeType,
dir: dir, saveAs: saveAs);
try {
await f.write(bytes);
} finally {
await f.dispose();
}
}
Future<SAFFile> openFile(String filenameWithoutExtension, String mimeType,
{String dir = ""}) async {
final fd = await _safChannel.invokeMethod<int>(
"openFile", [filenameWithoutExtension, dir, mimeType]);
return SAFFile(fd!);
{String dir = "",
bool read = false,
bool write = true,
bool append = false,
bool saveAs = true}) async {
if (!write) {
append = false;
}
final fd = await _safChannel.invokeMethod<int>("openFile",
[filenameWithoutExtension, dir, mimeType, read, write, append, saveAs]);
return SAFFile(fd!, read, write);
}
}
class SAFFile {
SAFFile(this._fd);
SAFFile(this._fd, this._read, this._write);
final int _fd;
final bool _read;
final bool _write;
bool _disposed = false;
Future<Uint8List> read(int maxLen) async {
if (_disposed) throw Exception("File already closed");
if (!_read) throw Exception("File not opened for read");
return await Path._safChannel.invokeMethod("readFile", [_fd, maxLen]);
}
/// 写入文件，返回此次写入的字节数
///
/// [data] 要写入文件的数据
Future<int> write(Uint8List data) async {
if (_disposed) throw Exception("File already closed");
return await Path._safChannel
.invokeMethod("writeFile", [_fd, data]);
if (!_write) throw Exception("File not opened for write");
return await Path._safChannel.invokeMethod("writeFile", [_fd, data]);
}
Future<void> dispose() async {

171
linux/my_application.cc
View File

@@ -6,6 +6,7 @@
#endif
#include <fcntl.h>
#include <string>
#include "flutter/generated_plugin_registrant.h"
@@ -66,117 +67,79 @@ const gchar* get_ext_from_mime_type(const gchar* mime_type) {
static void on_saf_channel_call(FlMethodChannel* channel, FlMethodCall* method_call,
gpointer user_data) {
const gchar* method = fl_method_call_get_name(method_call);
if (strcmp(method, "saveFile") == 0) {
auto args = fl_method_call_get_args(method_call);
auto fileName = fl_value_get_string(fl_value_get_list_value(args, 0));
auto dir = fl_value_get_string(fl_value_get_list_value(args, 1));
auto mimeType = fl_value_get_string(fl_value_get_list_value(args, 2));
auto odata = fl_value_get_list_value(args, 3);
auto data = fl_value_get_uint8_list(odata);
auto dataLen = fl_value_get_length(odata);
if (!fileName || !dir || !mimeType || !data) {
fl_method_call_respond_error(method_call, "INVALID_ARGUMENTS", "Invalid arguments", nullptr, nullptr);
return;
}
auto dialog = gtk_file_chooser_dialog_new("Save File", nullptr, GTK_FILE_CHOOSER_ACTION_SAVE,
"_Cancel", GTK_RESPONSE_CANCEL,
"_Save", GTK_RESPONSE_ACCEPT,
nullptr);
gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE);
auto ext = get_ext_from_mime_type(mimeType);
if (ext) {
auto gstr = g_string_new(fileName);
g_string_append(gstr, ext);
gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), gstr->str);
g_string_free(gstr, TRUE);
} else {
gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), fileName);
}
gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), dir);
auto filter = gtk_file_filter_new();
gtk_file_filter_add_mime_type(filter, mimeType);
gtk_file_filter_set_name(filter, get_filter_name_from_mime_type(mimeType));
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
filter = gtk_file_filter_new();
gtk_file_filter_add_pattern(filter, "*");
gtk_file_filter_set_name(filter, "All files");
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
auto res = gtk_dialog_run(GTK_DIALOG(dialog));
if (res == GTK_RESPONSE_ACCEPT) {
g_autoptr(GError) local_err = NULL;
auto file = gtk_file_chooser_get_file(GTK_FILE_CHOOSER(dialog));
GFileOutputStream* stream = g_file_replace(file, nullptr, FALSE, G_FILE_CREATE_NONE, nullptr, &local_err);
if (stream == nullptr) {
fl_method_call_respond_error(method_call, "SAVE_FILE_ERROR", local_err->message, nullptr, nullptr);
} else {
gboolean ok = g_output_stream_write_all(G_OUTPUT_STREAM(stream), data, dataLen, nullptr, nullptr, &local_err);
if (!ok) {
fl_method_call_respond_error(method_call, "SAVE_FILE_ERROR", local_err->message, nullptr, nullptr);
} else {
ok = g_output_stream_flush(G_OUTPUT_STREAM(stream), nullptr, &local_err);
if (!ok) {
fl_method_call_respond_error(method_call, "SAVE_FILE_ERROR", local_err->message, nullptr, nullptr);
} else {
ok = g_output_stream_close(G_OUTPUT_STREAM(stream), nullptr, &local_err);
if (!ok) {
fl_method_call_respond_error(method_call, "SAVE_FILE_ERROR", local_err->message, nullptr, nullptr);
} else {
fl_method_call_respond_success(method_call, nullptr, nullptr);
}
}
}
g_object_unref(stream);
}
g_object_unref(file);
} else {
fl_method_call_respond_error(method_call, "USER_CANCELED", "User canceled", nullptr, nullptr);
}
gtk_widget_destroy(dialog);
} else if (g_strcmp0(method, "openFile") == 0) {
if (g_strcmp0(method, "openFile") == 0) {
auto args = fl_method_call_get_args(method_call);
auto fileName = fl_value_get_string(fl_value_get_list_value(args, 0));
auto dir = fl_value_get_string(fl_value_get_list_value(args, 1));
auto mimeType = fl_value_get_string(fl_value_get_list_value(args, 2));
auto readOnly = fl_value_get_bool(fl_value_get_list_value(args, 3));
auto writeOnly = fl_value_get_bool(fl_value_get_list_value(args, 4));
auto append = fl_value_get_bool(fl_value_get_list_value(args, 5));
auto saveAs = fl_value_get_bool(fl_value_get_list_value(args, 6));
std::string filename;
if (!fileName || !dir || !mimeType) {
fl_method_call_respond_error(method_call, "INVALID_ARGUMENTS", "Invalid arguments", nullptr, nullptr);
return;
}
auto dialog = gtk_file_chooser_dialog_new("Save File", nullptr, GTK_FILE_CHOOSER_ACTION_SAVE,
if (saveAs) {
auto dialog = gtk_file_chooser_dialog_new("Save File", nullptr, GTK_FILE_CHOOSER_ACTION_SAVE,
"_Cancel", GTK_RESPONSE_CANCEL,
"_Save", GTK_RESPONSE_ACCEPT,
nullptr);
gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE);
auto ext = get_ext_from_mime_type(mimeType);
if (ext) {
auto gstr = g_string_new(fileName);
g_string_append(gstr, ext);
gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), gstr->str);
g_string_free(gstr, TRUE);
} else {
gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), fileName);
}
gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), dir);
auto filter = gtk_file_filter_new();
gtk_file_filter_add_mime_type(filter, mimeType);
gtk_file_filter_set_name(filter, get_filter_name_from_mime_type(mimeType));
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
filter = gtk_file_filter_new();
gtk_file_filter_add_pattern(filter, "*");
gtk_file_filter_set_name(filter, "All files");
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
auto res = gtk_dialog_run(GTK_DIALOG(dialog));
if (res == GTK_RESPONSE_ACCEPT) {
auto filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd != -1) {
fl_method_call_respond_success(method_call, fl_value_new_int(fd), nullptr);
gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE);
auto ext = get_ext_from_mime_type(mimeType);
if (ext) {
auto gstr = g_string_new(fileName);
g_string_append(gstr, ext);
gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), gstr->str);
g_string_free(gstr, TRUE);
} else {
fl_method_call_respond_error(method_call, "OPEN_FILE_ERROR", g_strerror(errno), nullptr, nullptr);
gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), fileName);
}
gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), dir);
auto filter = gtk_file_filter_new();
gtk_file_filter_add_mime_type(filter, mimeType);
gtk_file_filter_set_name(filter, get_filter_name_from_mime_type(mimeType));
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
filter = gtk_file_filter_new();
gtk_file_filter_add_pattern(filter, "*");
gtk_file_filter_set_name(filter, "All files");
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
auto res = gtk_dialog_run(GTK_DIALOG(dialog));
if (res == GTK_RESPONSE_ACCEPT) {
filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
} else {
fl_method_call_respond_error(method_call, "USER_CANCELED", "User canceled", nullptr, nullptr);
gtk_widget_destroy(dialog);
return;
}
gtk_widget_destroy(dialog);
} else {
fl_method_call_respond_error(method_call, "USER_CANCELED", "User canceled", nullptr, nullptr);
filename = dir;
filename += "/";
filename += fileName;
auto ext = get_ext_from_mime_type(mimeType);
if (ext) {
filename += ext;
}
}
int flags = 0;
if (readOnly && writeOnly) {
flags |= O_RDWR | O_CREAT;
} else if (readOnly) {
flags |= O_RDONLY;
} else if (writeOnly) {
flags |= O_WRONLY | O_TRUNC | O_CREAT;
}
if (append) {
flags |= O_APPEND;
}
int fd = open(filename.c_str(), flags, 0644);
if (fd != -1) {
fl_method_call_respond_success(method_call, fl_value_new_int(fd), nullptr);
} else {
fl_method_call_respond_error(method_call, "OPEN_FILE_ERROR", g_strerror(errno), nullptr, nullptr);
}
gtk_widget_destroy(dialog);
} else if (g_strcmp0(method, "writeFile") == 0) {
auto args = fl_method_call_get_args(method_call);
auto fd = fl_value_get_int(fl_value_get_list_value(args, 0));
@@ -202,6 +165,22 @@ static void on_saf_channel_call(FlMethodChannel* channel, FlMethodCall* method_c
} else {
fl_method_call_respond_error(method_call, "CLOSE_FILE_ERROR", g_strerror(errno), nullptr, nullptr);
}
} else if (g_strcmp0(method, "readFile") == 0) {
auto args = fl_method_call_get_args(method_call);
auto fd = fl_value_get_int(fl_value_get_list_value(args, 0));
auto maxLen = fl_value_get_int(fl_value_get_list_value(args, 1));
auto data = g_malloc(maxLen);
if (!data) {
fl_method_call_respond_error(method_call, "OUT_OF_MEMORY", "Out of memory", nullptr, nullptr);
return;
}
auto count = read(fd, data, maxLen);
if (count != (ssize_t)-1) {
fl_method_call_respond_success(method_call, fl_value_new_uint8_list((const uint8_t*)data, count), nullptr);
} else {
fl_method_call_respond_error(method_call, "READ_FILE_ERROR", g_strerror(errno), nullptr, nullptr);
}
g_free(data);
} else {
fl_method_call_respond_not_implemented(method_call, nullptr);
}