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file_dialog_gtk.cc
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file_dialog_gtk.cc
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// Copyright (c) 2014 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include <memory>
#include <string>
#include "base/callback.h"
#include "base/files/file_util.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_restrictions.h"
#include "electron/electron_gtk_stubs.h"
#include "shell/browser/javascript_environment.h"
#include "shell/browser/native_window_views.h"
#include "shell/browser/ui/file_dialog.h"
#include "shell/browser/ui/gtk_util.h"
#include "shell/browser/unresponsive_suppressor.h"
#include "shell/common/gin_converters/file_path_converter.h"
#include "ui/base/glib/glib_signal.h"
#include "ui/gtk/gtk_ui.h" // nogncheck
#include "ui/gtk/gtk_util.h" // nogncheck
namespace file_dialog {
DialogSettings::DialogSettings() = default;
DialogSettings::DialogSettings(const DialogSettings&) = default;
DialogSettings::~DialogSettings() = default;
namespace {
static const int kPreviewWidth = 256;
static const int kPreviewHeight = 512;
std::string MakeCaseInsensitivePattern(const std::string& extension) {
// If the extension is the "all files" extension, no change needed.
if (extension == "*")
return extension;
std::string pattern("*.");
for (std::size_t i = 0, n = extension.size(); i < n; i++) {
char ch = extension[i];
if (!base::IsAsciiAlpha(ch)) {
pattern.push_back(ch);
continue;
}
pattern.push_back('[');
pattern.push_back(base::ToLowerASCII(ch));
pattern.push_back(base::ToUpperASCII(ch));
pattern.push_back(']');
}
return pattern;
}
class FileChooserDialog {
public:
FileChooserDialog(GtkFileChooserAction action, const DialogSettings& settings)
: parent_(
static_cast<electron::NativeWindowViews*>(settings.parent_window)),
filters_(settings.filters) {
auto label = settings.button_label;
if (electron::IsElectron_gtkInitialized()) {
dialog_ = GTK_FILE_CHOOSER(gtk_file_chooser_native_new(
settings.title.c_str(), NULL, action,
label.empty() ? nullptr : label.c_str(), nullptr));
} else {
const char* confirm_text = gtk_util::GetOkLabel();
if (!label.empty())
confirm_text = label.c_str();
else if (action == GTK_FILE_CHOOSER_ACTION_SAVE)
confirm_text = gtk_util::GetSaveLabel();
else if (action == GTK_FILE_CHOOSER_ACTION_OPEN)
confirm_text = gtk_util::GetOpenLabel();
dialog_ = GTK_FILE_CHOOSER(gtk_file_chooser_dialog_new(
settings.title.c_str(), NULL, action, gtk_util::GetCancelLabel(),
GTK_RESPONSE_CANCEL, confirm_text, GTK_RESPONSE_ACCEPT, NULL));
}
if (parent_) {
parent_->SetEnabled(false);
if (electron::IsElectron_gtkInitialized()) {
gtk_native_dialog_set_modal(GTK_NATIVE_DIALOG(dialog_), TRUE);
} else {
gtk::SetGtkTransientForAura(GTK_WIDGET(dialog_),
parent_->GetNativeWindow());
gtk_window_set_modal(GTK_WINDOW(dialog_), TRUE);
}
}
if (action == GTK_FILE_CHOOSER_ACTION_SAVE)
gtk_file_chooser_set_do_overwrite_confirmation(dialog_, TRUE);
if (action != GTK_FILE_CHOOSER_ACTION_OPEN)
gtk_file_chooser_set_create_folders(dialog_, TRUE);
if (!settings.default_path.empty()) {
base::ThreadRestrictions::ScopedAllowIO allow_io;
if (base::DirectoryExists(settings.default_path)) {
gtk_file_chooser_set_current_folder(
dialog_, settings.default_path.value().c_str());
} else {
if (settings.default_path.IsAbsolute()) {
gtk_file_chooser_set_current_folder(
dialog_, settings.default_path.DirName().value().c_str());
}
gtk_file_chooser_set_current_name(
GTK_FILE_CHOOSER(dialog_),
settings.default_path.BaseName().value().c_str());
}
}
if (!settings.filters.empty())
AddFilters(settings.filters);
// GtkFileChooserNative does not support preview widgets through the
// org.freedesktop.portal.FileChooser portal. In the case of running through
// the org.freedesktop.portal.FileChooser portal, anything having to do with
// the update-preview signal or the preview widget will just be ignored.
if (!electron::IsElectron_gtkInitialized()) {
preview_ = gtk_image_new();
g_signal_connect(dialog_, "update-preview",
G_CALLBACK(OnUpdatePreviewThunk), this);
gtk_file_chooser_set_preview_widget(dialog_, preview_);
}
}
~FileChooserDialog() {
if (electron::IsElectron_gtkInitialized()) {
gtk_native_dialog_destroy(GTK_NATIVE_DIALOG(dialog_));
} else {
gtk_widget_destroy(GTK_WIDGET(dialog_));
}
if (parent_)
parent_->SetEnabled(true);
}
// disable copy
FileChooserDialog(const FileChooserDialog&) = delete;
FileChooserDialog& operator=(const FileChooserDialog&) = delete;
void SetupOpenProperties(int properties) {
const auto hasProp = [properties](OpenFileDialogProperty prop) {
return gboolean((properties & prop) != 0);
};
auto* file_chooser = dialog();
gtk_file_chooser_set_select_multiple(file_chooser,
hasProp(OPEN_DIALOG_MULTI_SELECTIONS));
gtk_file_chooser_set_show_hidden(file_chooser,
hasProp(OPEN_DIALOG_SHOW_HIDDEN_FILES));
}
void SetupSaveProperties(int properties) {
const auto hasProp = [properties](SaveFileDialogProperty prop) {
return gboolean((properties & prop) != 0);
};
auto* file_chooser = dialog();
gtk_file_chooser_set_show_hidden(file_chooser,
hasProp(SAVE_DIALOG_SHOW_HIDDEN_FILES));
gtk_file_chooser_set_do_overwrite_confirmation(
file_chooser, hasProp(SAVE_DIALOG_SHOW_OVERWRITE_CONFIRMATION));
}
void RunAsynchronous() {
g_signal_connect(dialog_, "response", G_CALLBACK(OnFileDialogResponseThunk),
this);
if (electron::IsElectron_gtkInitialized()) {
gtk_native_dialog_show(GTK_NATIVE_DIALOG(dialog_));
} else {
gtk_widget_show_all(GTK_WIDGET(dialog_));
gtk::GtkUi::GetPlatform()->ShowGtkWindow(GTK_WINDOW(dialog_));
}
}
void RunSaveAsynchronous(
gin_helper::Promise<gin_helper::Dictionary> promise) {
save_promise_ =
std::make_unique<gin_helper::Promise<gin_helper::Dictionary>>(
std::move(promise));
RunAsynchronous();
}
void RunOpenAsynchronous(
gin_helper::Promise<gin_helper::Dictionary> promise) {
open_promise_ =
std::make_unique<gin_helper::Promise<gin_helper::Dictionary>>(
std::move(promise));
RunAsynchronous();
}
base::FilePath GetFileName() const {
gchar* filename = gtk_file_chooser_get_filename(dialog_);
const base::FilePath path(filename);
g_free(filename);
return path;
}
std::vector<base::FilePath> GetFileNames() const {
std::vector<base::FilePath> paths;
auto* filenames = gtk_file_chooser_get_filenames(GTK_FILE_CHOOSER(dialog_));
for (auto* iter = filenames; iter != nullptr; iter = iter->next) {
auto* filename = static_cast<char*>(iter->data);
paths.emplace_back(filename);
g_free(filename);
}
g_slist_free(filenames);
return paths;
}
CHROMEG_CALLBACK_1(FileChooserDialog,
void,
OnFileDialogResponse,
GtkWidget*,
int);
GtkFileChooser* dialog() const { return dialog_; }
private:
void AddFilters(const Filters& filters);
electron::NativeWindowViews* parent_;
electron::UnresponsiveSuppressor unresponsive_suppressor_;
GtkFileChooser* dialog_;
GtkWidget* preview_;
Filters filters_;
std::unique_ptr<gin_helper::Promise<gin_helper::Dictionary>> save_promise_;
std::unique_ptr<gin_helper::Promise<gin_helper::Dictionary>> open_promise_;
// Callback for when we update the preview for the selection.
CHROMEG_CALLBACK_0(FileChooserDialog, void, OnUpdatePreview, GtkFileChooser*);
};
void FileChooserDialog::OnFileDialogResponse(GtkWidget* widget, int response) {
if (electron::IsElectron_gtkInitialized()) {
gtk_native_dialog_hide(GTK_NATIVE_DIALOG(dialog_));
} else {
gtk_widget_hide(GTK_WIDGET(dialog_));
}
v8::Isolate* isolate = electron::JavascriptEnvironment::GetIsolate();
v8::HandleScope scope(isolate);
if (save_promise_) {
gin_helper::Dictionary dict =
gin::Dictionary::CreateEmpty(save_promise_->isolate());
if (response == GTK_RESPONSE_ACCEPT) {
dict.Set("canceled", false);
dict.Set("filePath", GetFileName());
} else {
dict.Set("canceled", true);
dict.Set("filePath", base::FilePath());
}
save_promise_->Resolve(dict);
} else if (open_promise_) {
gin_helper::Dictionary dict =
gin::Dictionary::CreateEmpty(open_promise_->isolate());
if (response == GTK_RESPONSE_ACCEPT) {
dict.Set("canceled", false);
dict.Set("filePaths", GetFileNames());
} else {
dict.Set("canceled", true);
dict.Set("filePaths", std::vector<base::FilePath>());
}
open_promise_->Resolve(dict);
}
delete this;
}
void FileChooserDialog::AddFilters(const Filters& filters) {
for (const auto& filter : filters) {
GtkFileFilter* gtk_filter = gtk_file_filter_new();
for (const auto& extension : filter.second) {
std::string pattern = MakeCaseInsensitivePattern(extension);
gtk_file_filter_add_pattern(gtk_filter, pattern.c_str());
}
gtk_file_filter_set_name(gtk_filter, filter.first.c_str());
gtk_file_chooser_add_filter(dialog_, gtk_filter);
}
}
bool CanPreview(const struct stat& st) {
// Only preview regular files; pipes may hang.
// See https://crbug.com/534754.
if (!S_ISREG(st.st_mode)) {
return false;
}
// Don't preview huge files; they may crash.
// https://github.com/electron/electron/issues/31630
// Setting an arbitrary filesize max t at 100 MB here.
constexpr off_t ArbitraryMax = 100000000ULL;
return st.st_size < ArbitraryMax;
}
void FileChooserDialog::OnUpdatePreview(GtkFileChooser* chooser) {
CHECK(!electron::IsElectron_gtkInitialized());
gchar* filename = gtk_file_chooser_get_preview_filename(chooser);
if (!filename) {
gtk_file_chooser_set_preview_widget_active(chooser, FALSE);
return;
}
struct stat sb;
if (stat(filename, &sb) != 0 || !CanPreview(sb)) {
g_free(filename);
gtk_file_chooser_set_preview_widget_active(chooser, FALSE);
return;
}
// This will preserve the image's aspect ratio.
GdkPixbuf* pixbuf = gdk_pixbuf_new_from_file_at_size(filename, kPreviewWidth,
kPreviewHeight, nullptr);
g_free(filename);
if (pixbuf) {
gtk_image_set_from_pixbuf(GTK_IMAGE(preview_), pixbuf);
g_object_unref(pixbuf);
}
gtk_file_chooser_set_preview_widget_active(chooser, pixbuf ? TRUE : FALSE);
}
} // namespace
void ShowFileDialog(const FileChooserDialog& dialog) {
// gtk_native_dialog_run() will call gtk_native_dialog_show() for us.
if (!electron::IsElectron_gtkInitialized()) {
gtk_widget_show_all(GTK_WIDGET(dialog.dialog()));
}
}
int RunFileDialog(const FileChooserDialog& dialog) {
int response = 0;
if (electron::IsElectron_gtkInitialized()) {
response = gtk_native_dialog_run(GTK_NATIVE_DIALOG(dialog.dialog()));
} else {
response = gtk_dialog_run(GTK_DIALOG(dialog.dialog()));
}
return response;
}
bool ShowOpenDialogSync(const DialogSettings& settings,
std::vector<base::FilePath>* paths) {
GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;
if (settings.properties & OPEN_DIALOG_OPEN_DIRECTORY)
action = GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER;
FileChooserDialog open_dialog(action, settings);
open_dialog.SetupOpenProperties(settings.properties);
ShowFileDialog(open_dialog);
const int response = RunFileDialog(open_dialog);
if (response == GTK_RESPONSE_ACCEPT) {
*paths = open_dialog.GetFileNames();
return true;
}
return false;
}
void ShowOpenDialog(const DialogSettings& settings,
gin_helper::Promise<gin_helper::Dictionary> promise) {
GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;
if (settings.properties & OPEN_DIALOG_OPEN_DIRECTORY)
action = GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER;
FileChooserDialog* open_dialog = new FileChooserDialog(action, settings);
open_dialog->SetupOpenProperties(settings.properties);
open_dialog->RunOpenAsynchronous(std::move(promise));
}
bool ShowSaveDialogSync(const DialogSettings& settings, base::FilePath* path) {
FileChooserDialog save_dialog(GTK_FILE_CHOOSER_ACTION_SAVE, settings);
save_dialog.SetupSaveProperties(settings.properties);
ShowFileDialog(save_dialog);
const int response = RunFileDialog(save_dialog);
if (response == GTK_RESPONSE_ACCEPT) {
*path = save_dialog.GetFileName();
return true;
}
return false;
}
void ShowSaveDialog(const DialogSettings& settings,
gin_helper::Promise<gin_helper::Dictionary> promise) {
FileChooserDialog* save_dialog =
new FileChooserDialog(GTK_FILE_CHOOSER_ACTION_SAVE, settings);
save_dialog->RunSaveAsynchronous(std::move(promise));
}
} // namespace file_dialog