1 | /* $Id: VBoxDbgConsole.h 38813 2011-09-21 12:28:27Z vboxsync $ */
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2 | /** @file
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3 | * VBox Debugger GUI - Console.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2010 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 | #ifndef ___Debugger_VBoxDbgConsole_h
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19 | #define ___Debugger_VBoxDbgConsole_h
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20 |
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21 | #include "VBoxDbgBase.h"
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22 |
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23 | #include <QTextEdit>
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24 | #include <QComboBox>
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25 | #include <QTimer>
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26 | #include <QEvent>
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27 |
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28 | #include <iprt/critsect.h>
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29 | #include <iprt/semaphore.h>
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30 | #include <iprt/thread.h>
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31 |
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32 |
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33 | class VBoxDbgConsoleOutput : public QTextEdit
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34 | {
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35 | Q_OBJECT
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36 |
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37 | public:
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38 | /**
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39 | * Constructor.
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40 | *
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41 | * @param pParent Parent Widget.
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42 | * @param pszName Widget name.
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43 | */
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44 | VBoxDbgConsoleOutput(QWidget *pParent = NULL, const char *pszName = NULL);
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45 |
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46 | /**
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47 | * Destructor
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48 | */
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49 | virtual ~VBoxDbgConsoleOutput();
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50 |
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51 | /**
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52 | * Appends text.
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53 | * This differs from QTextEdit::append() in that it won't start on a new paragraph
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54 | * unless the previous char was a newline ('\n').
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55 | *
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56 | * @param rStr The text string to append.
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57 | * @param fClearSelection Whether to clear selected text before appending.
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58 | * If @c false the selection and window position
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59 | * are preserved.
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60 | */
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61 | virtual void appendText(const QString &rStr, bool fClearSelection);
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62 |
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63 | protected:
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64 | /** The current line (paragraph) number. */
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65 | unsigned m_uCurLine;
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66 | /** The position in the current line. */
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67 | unsigned m_uCurPos;
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68 | /** The handle to the GUI thread. */
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69 | RTNATIVETHREAD m_hGUIThread;
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70 | };
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71 |
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72 |
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73 | /**
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74 | * The Debugger Console Input widget.
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75 | *
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76 | * This is a combobox which only responds to <return>.
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77 | */
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78 | class VBoxDbgConsoleInput : public QComboBox
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79 | {
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80 | Q_OBJECT
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81 |
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82 | public:
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83 | /**
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84 | * Constructor.
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85 | *
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86 | * @param pParent Parent Widget.
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87 | * @param pszName Widget name.
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88 | */
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89 | VBoxDbgConsoleInput(QWidget *pParent = NULL, const char *pszName = NULL);
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90 |
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91 | /**
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92 | * Destructor
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93 | */
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94 | virtual ~VBoxDbgConsoleInput();
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95 |
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96 | /**
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97 | * We overload this method to get signaled upon returnPressed().
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98 | *
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99 | * See QComboBox::setLineEdit for full description.
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100 | * @param pEdit The new line edit widget.
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101 | * @remark This won't be called during the constructor.
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102 | */
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103 | virtual void setLineEdit(QLineEdit *pEdit);
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104 |
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105 | signals:
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106 | /**
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107 | * New command submitted.
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108 | */
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109 | void commandSubmitted(const QString &rCommand);
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110 |
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111 | private slots:
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112 | /**
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113 | * Returned was pressed.
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114 | *
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115 | * Will emit commandSubmitted().
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116 | */
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117 | void returnPressed();
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118 |
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119 | protected:
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120 | /** The current blank entry. */
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121 | int m_iBlankItem;
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122 | /** The handle to the GUI thread. */
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123 | RTNATIVETHREAD m_hGUIThread;
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124 | };
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125 |
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126 |
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127 | /**
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128 | * The Debugger Console.
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129 | */
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130 | class VBoxDbgConsole : public VBoxDbgBaseWindow
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131 | {
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132 | Q_OBJECT
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133 |
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134 | public:
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135 | /**
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136 | * Constructor.
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137 | *
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138 | * @param a_pDbgGui Pointer to the debugger gui object.
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139 | * @param a_pParent Parent Widget.
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140 | */
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141 | VBoxDbgConsole(VBoxDbgGui *a_pDbgGui, QWidget *a_pParent = NULL);
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142 |
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143 | /**
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144 | * Destructor
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145 | */
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146 | virtual ~VBoxDbgConsole();
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147 |
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148 | protected slots:
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149 | /**
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150 | * Handler called when a command is submitted.
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151 | * (Enter or return pressed in the combo box.)
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152 | *
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153 | * @param rCommand The submitted command.
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154 | */
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155 | void commandSubmitted(const QString &rCommand);
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156 |
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157 | /**
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158 | * Updates the output with what's currently in the output buffer.
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159 | * This is called by a timer or a User event posted by the debugger thread.
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160 | */
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161 | void updateOutput();
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162 |
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163 | /**
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164 | * Changes the focus to the input field.
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165 | */
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166 | void actFocusToInput();
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167 |
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168 | /**
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169 | * Changes the focus to the output viewer widget.
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170 | */
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171 | void actFocusToOutput();
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172 |
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173 | protected:
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174 | /**
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175 | * Override the closeEvent so we can choose delete the window when
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176 | * it is closed.
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177 | *
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178 | * @param a_pCloseEvt The close event.
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179 | */
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180 | virtual void closeEvent(QCloseEvent *a_pCloseEvt);
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181 |
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182 | /**
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183 | * Lock the object.
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184 | */
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185 | void lock();
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186 |
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187 | /**
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188 | * Unlocks the object.
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189 | */
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190 | void unlock();
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191 |
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192 | protected:
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193 | /** @name Debug Console Backend.
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194 | * @{
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195 | */
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196 |
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197 |
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198 | /**
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199 | * Checks if there is input.
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200 | *
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201 | * @returns true if there is input ready.
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202 | * @returns false if there not input ready.
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203 | * @param pBack Pointer to VBoxDbgConsole::m_Back.
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204 | * @param cMillies Number of milliseconds to wait on input data.
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205 | */
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206 | static DECLCALLBACK(bool) backInput(PDBGCBACK pBack, uint32_t cMillies);
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207 |
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208 | /**
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209 | * Read input.
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210 | *
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211 | * @returns VBox status code.
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212 | * @param pBack Pointer to VBoxDbgConsole::m_Back.
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213 | * @param pvBuf Where to put the bytes we read.
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214 | * @param cbBuf Maximum nymber of bytes to read.
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215 | * @param pcbRead Where to store the number of bytes actually read.
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216 | * If NULL the entire buffer must be filled for a
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217 | * successful return.
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218 | */
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219 | static DECLCALLBACK(int) backRead(PDBGCBACK pBack, void *pvBuf, size_t cbBuf, size_t *pcbRead);
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220 |
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221 | /**
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222 | * Write (output).
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223 | *
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224 | * @returns VBox status code.
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225 | * @param pBack Pointer to VBoxDbgConsole::m_Back.
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226 | * @param pvBuf What to write.
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227 | * @param cbBuf Number of bytes to write.
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228 | * @param pcbWritten Where to store the number of bytes actually written.
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229 | * If NULL the entire buffer must be successfully written.
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230 | */
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231 | static DECLCALLBACK(int) backWrite(PDBGCBACK pBack, const void *pvBuf, size_t cbBuf, size_t *pcbWritten);
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232 |
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233 | /**
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234 | * @copydoc FNDBGCBACKSETREADY
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235 | */
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236 | static DECLCALLBACK(void) backSetReady(PDBGCBACK pBack, bool fReady);
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237 |
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238 | /**
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239 | * The Debugger Console Thread
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240 | *
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241 | * @returns VBox status code (ignored).
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242 | * @param Thread The thread handle.
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243 | * @param pvUser Pointer to the VBoxDbgConsole object.s
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244 | */
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245 | static DECLCALLBACK(int) backThread(RTTHREAD Thread, void *pvUser);
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246 |
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247 | /** @} */
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248 |
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249 | protected:
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250 | /**
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251 | * Processes GUI command posted by the console thread.
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252 | *
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253 | * Qt3 isn't thread safe on any platform, meaning there is no locking, so, as
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254 | * a result we have to be very careful. All operations on objects which we share
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255 | * with the main thread has to be posted to it so it can perform it.
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256 | */
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257 | bool event(QEvent *pEvent);
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258 |
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259 | protected:
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260 | /** The output widget. */
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261 | VBoxDbgConsoleOutput *m_pOutput;
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262 | /** The input widget. */
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263 | VBoxDbgConsoleInput *m_pInput;
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264 | /** A hack to restore focus to the combobox after a command execution. */
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265 | bool m_fInputRestoreFocus;
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266 | /** The input buffer. */
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267 | char *m_pszInputBuf;
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268 | /** The amount of input in the buffer. */
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269 | size_t m_cbInputBuf;
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270 | /** The allocated size of the buffer. */
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271 | size_t m_cbInputBufAlloc;
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272 |
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273 | /** The output buffer. */
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274 | char *m_pszOutputBuf;
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275 | /** The amount of output in the buffer. */
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276 | size_t m_cbOutputBuf;
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277 | /** The allocated size of the buffer. */
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278 | size_t m_cbOutputBufAlloc;
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279 | /** The timer object used to process output in a delayed fashion. */
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280 | QTimer *m_pTimer;
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281 | /** Set when an output update is pending. */
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282 | bool volatile m_fUpdatePending;
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283 |
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284 | /** The debugger console thread. */
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285 | RTTHREAD m_Thread;
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286 | /** The event semaphore used to signal the debug console thread about input. */
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287 | RTSEMEVENT m_EventSem;
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288 | /** The critical section used to lock the object. */
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289 | RTCRITSECT m_Lock;
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290 | /** When set the thread will cause the debug console thread to terminate. */
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291 | bool volatile m_fTerminate;
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292 | /** Has the thread terminated?
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293 | * Used to do the right thing in closeEvent; the console is dead if the
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294 | * thread has terminated. */
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295 | bool volatile m_fThreadTerminated;
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296 |
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297 | /** The debug console backend structure.
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298 | * Use VBOXDBGCONSOLE_FROM_DBGCBACK to convert the DBGCBACK pointer to a object pointer. */
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299 | struct VBoxDbgConsoleBack
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300 | {
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301 | DBGCBACK Core;
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302 | VBoxDbgConsole *pSelf;
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303 | } m_Back;
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304 |
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305 | /**
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306 | * Converts a pointer to VBoxDbgConsole::m_Back to VBoxDbgConsole pointer.
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307 | * @todo find a better way because offsetof is undefined on objects and g++ gets very noisy because of that.
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308 | */
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309 | # define VBOXDBGCONSOLE_FROM_DBGCBACK(pBack) ( ((struct VBoxDbgConsoleBack *)(pBack))->pSelf )
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310 |
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311 | /** Change focus to the input field. */
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312 | QAction *m_pFocusToInput;
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313 | /** Change focus to the output viewer widget. */
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314 | QAction *m_pFocusToOutput;
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315 | };
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316 |
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317 |
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318 | /**
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319 | * Simple event class for push certain operations over
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320 | * onto the GUI thread.
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321 | */
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322 | class VBoxDbgConsoleEvent : public QEvent
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323 | {
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324 | public:
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325 | typedef enum { kUpdate, kInputEnable, kTerminatedUser, kTerminatedOther } VBoxDbgConsoleEventType;
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326 | enum { kEventNumber = QEvent::User + 42 };
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327 |
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328 | VBoxDbgConsoleEvent(VBoxDbgConsoleEventType enmCommand)
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329 | : QEvent((QEvent::Type)kEventNumber), m_enmCommand(enmCommand)
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330 | {
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331 | }
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332 |
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333 | VBoxDbgConsoleEventType command() const
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334 | {
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335 | return m_enmCommand;
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336 | }
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337 |
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338 | private:
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339 | VBoxDbgConsoleEventType m_enmCommand;
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340 | };
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341 |
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342 |
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343 | #endif
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344 |
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