src/gui/fspathedit_p.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2016 Eugene Shalygin
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #pragma once
  30
  31 #include <QComboBox>
  32 #include <QFileIconProvider>
  33 #include <QLineEdit>
  34 #include <QtContainerFwd>
  35 #include <QValidator>
  36
  37 #include "base/pathfwd.h"
  38
  39 class QAction;
  40 class QCompleter;
  41 class QContextMenuEvent;
  42 class QFileSystemModel;
  43 class QKeyEvent;
  44
  45 namespace Private
  46 {
  47     class FileSystemPathValidator final : public QValidator
  48     {
  49         Q_OBJECT
  50         Q_DISABLE_COPY_MOVE(FileSystemPathValidator)
  51
  52     public:
  53         enum class TestResult
  54         {
  55             OK,
  56             DoesNotExist,
  57             NotADir,
  58             NotAFile,
  59             CantRead,
  60             CantWrite
  61         };
  62
  63         FileSystemPathValidator(QObject *parent = nullptr);
  64
  65         bool strictMode() const;
  66         void setStrictMode(bool value);
  67
  68         bool existingOnly() const;
  69         void setExistingOnly(bool value);
  70
  71         bool filesOnly() const;
  72         void setFilesOnly(bool value);
  73
  74         bool directoriesOnly() const;
  75         void setDirectoriesOnly(bool value);
  76
  77         bool checkReadPermission() const;
  78         void setCheckReadPermission(bool value);
  79
  80         bool checkWritePermission() const;
  81         void setCheckWritePermission(bool value);
  82
  83         TestResult lastTestResult() const;
  84         QValidator::State lastValidationState() const;
  85
  86         QValidator::State validate(QString &input, int &pos) const override;
  87
  88     private:
  89         TestResult testPath(const Path &path) const;
  90
  91         bool m_strictMode = false;
  92         bool m_existingOnly = false;
  93         bool m_filesOnly = false;
  94         bool m_directoriesOnly = false;
  95         bool m_checkReadPermission = false;
  96         bool m_checkWritePermission = false;
  97
  98         mutable TestResult m_lastTestResult = TestResult::DoesNotExist;
  99         mutable QValidator::State m_lastValidationState = QValidator::Invalid;
 100     };
 101
 102     class IFileEditorWithCompletion
 103     {
 104     public:
 105         virtual ~IFileEditorWithCompletion() = default;
 106         virtual void completeDirectoriesOnly(bool completeDirsOnly) = 0;
 107         virtual void setFilenameFilters(const QStringList &filters) = 0;
 108         virtual void setBrowseAction(QAction *action) = 0;
 109         virtual void setValidator(QValidator *validator) = 0;
 110         virtual Path placeholder() const = 0;
 111         virtual void setPlaceholder(const Path &val) = 0;
 112         virtual QWidget *widget() = 0;
 113     };
 114
 115     class FileLineEdit final : public QLineEdit, public IFileEditorWithCompletion
 116     {
 117         Q_OBJECT
 118         Q_DISABLE_COPY_MOVE(FileLineEdit)
 119
 120     public:
 121         FileLineEdit(QWidget *parent = nullptr);
 122         ~FileLineEdit();
 123
 124         void completeDirectoriesOnly(bool completeDirsOnly) override;
 125         void setFilenameFilters(const QStringList &filters) override;
 126         void setBrowseAction(QAction *action) override;
 127         void setValidator(QValidator *validator) override;
 128         Path placeholder() const override;
 129         void setPlaceholder(const Path &val) override;
 130         QWidget *widget() override;
 131
 132     protected:
 133         void keyPressEvent(QKeyEvent *event) override;
 134         void contextMenuEvent(QContextMenuEvent *event) override;
 135
 136     private:
 137         void showCompletionPopup();
 138         void validateText();
 139
 140         static QString warningText(FileSystemPathValidator::TestResult result);
 141
 142         QFileSystemModel *m_completerModel = nullptr;
 143         QCompleter *m_completer = nullptr;
 144         QAction *m_browseAction = nullptr;
 145         QAction *m_warningAction = nullptr;
 146         QFileIconProvider m_iconProvider;
 147     };
 148
 149     class FileComboEdit final : public QComboBox, public IFileEditorWithCompletion
 150     {
 151         Q_OBJECT
 152         Q_DISABLE_COPY_MOVE(FileComboEdit)
 153
 154     public:
 155         FileComboEdit(QWidget *parent = nullptr);
 156
 157         void completeDirectoriesOnly(bool completeDirsOnly) override;
 158         void setFilenameFilters(const QStringList &filters) override;
 159         void setBrowseAction(QAction *action) override;
 160         void setValidator(QValidator *validator) override;
 161         Path placeholder() const override;
 162         void setPlaceholder(const Path &val) override;
 163         QWidget *widget() override;
 164
 165     protected:
 166         QString text() const;
 167     };
 168 }