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annotate libgui/src/interpreter-qobject.cc @ 29163:8f67ad8b3103

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maint: Updating naming conventions for exceptions and use const where possible. * GLCanvas.cc, interpreter-qobject.cc, file-editor-tab.cc, octave-qscintilla.cc, octave-qobject.cc, Cell.cc, __eigs__.cc, __magick_read__.cc, __qp__.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, file-io.cc, graphics.cc, graphics.in.h, input.cc, interpreter.cc, ls-mat-ascii.cc, lsode.cc, oct-handle.h, oct-map.cc, quad.cc, rand.cc, sparse.cc, sub2ind.cc, toplev.cc, utils.cc, __init_gnuplot__.cc, __ode15__.cc, cdef-object.cc, ov-base-diag.cc, ov-base-mat.cc, ov-base-sparse.cc, ov-base.cc, ov-fcn-handle.cc, ov-java.cc, ov-perm.cc, ov-range.cc, ov-re-diag.cc, ov-str-mat.cc, ov.cc, pt-assign.cc, pt-eval.cc, pt-idx.cc, pt-jit.cc, pt.cc, Array-util.cc, randmtzig.cc: Update naming conventions for exceptions to use initial letter of exception type. For example, "execution_exception" is named "ee", "index_exception" is "ie". Catch "const" exceptions where possible. * gzip.cc: Add block to catch and throw interrupt_exceptions before having a catch block "(...)" for everything else.
author Rik <rik@octave.org>
date Tue, 08 Dec 2020 13:25:03 -0800
parents 00a9a49c7670
children c2f3a0832cf0
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2011-2020 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include "interpreter-qobject.h"
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31 #include "octave-qobject.h"
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32 #include "qt-application.h"
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33 #include "qt-interpreter-events.h"
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34
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35 #include "graphics-init.h"
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36 #include "input.h"
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37 #include "interpreter.h"
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38
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39 namespace octave
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40 {
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41 interpreter_qobject::interpreter_qobject (base_qobject& oct_qobj)
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42 : QObject (), m_octave_qobj (oct_qobj), m_interpreter (nullptr)
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43 { }
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44
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45 void interpreter_qobject::execute (void)
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46 {
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47 // The Octave application context owns the interpreter.
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48
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49 qt_application& app_context = m_octave_qobj.app_context ();
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50
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51 interpreter& interp = app_context.create_interpreter ();
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52
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53 event_manager& evmgr = interp.get_event_manager ();
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54
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55 evmgr.connect_link (m_octave_qobj.get_qt_interpreter_events ());
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56 evmgr.enable ();
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57
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58 int exit_status = 0;
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59
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60 try
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61 {
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62 // Final initialization.
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63
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64 interp.initialize ();
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65
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66 if (app_context.start_gui_p ())
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67 {
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68 input_system& input_sys = interp.get_input_system ();
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69
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70 input_sys.PS1 (">> ");
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71 input_sys.PS2 ("");
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72 }
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73
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74 if (interp.initialized ())
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75 {
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76 // The interpreter should be completely ready at this point so let
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77 // the GUI know.
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78
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79 m_interpreter = &interp;
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80
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81 emit ready ();
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82
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83 graphics_init (interp, m_octave_qobj);
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84
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85 // Start executing commands in the command window.
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86
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87 exit_status = interp.execute ();
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88 }
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89 }
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90 catch (const exit_exception& xe)
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91 {
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92 exit_status = xe.exit_status ();
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93 }
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94
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95 // Signal that the interpreter is done executing code in the main
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96 // REPL, from script files, or command line eval arguments. By
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97 // using a signal here, we give the GUI a chance to process any
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98 // pending events, then signal that it is safe to shutdown the
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99 // interpreter. Our notification here allows the GUI to insert the
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100 // request to shutdown the interpreter in the event queue after any
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101 // other pending signals. The application context owns the
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102 // interpreter and will be responsible for deleting it later, when
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103 // the application object destructor is executed.
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104
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105 emit execution_finished (exit_status);
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106 }
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107
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108 // This function is expected to be executed when the GUI signals that
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109 // it is finished processing events and ready for the interpreter to
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110 // perform shutdown actions.
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111
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112 void interpreter_qobject::shutdown (int exit_status)
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113 {
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114 if (m_interpreter)
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115 m_interpreter->shutdown ();
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116
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117 // Signal that the interpreter has executed shutdown actions.
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118
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119 emit shutdown_finished (exit_status);
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120 }
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121
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122 void interpreter_qobject::interpreter_event (const fcn_callback& fcn)
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123 {
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124 if (! m_interpreter)
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125 return;
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126
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127 event_manager& evmgr = m_interpreter->get_event_manager ();
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128
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129 evmgr.post_event (fcn);
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130 }
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131
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132 void interpreter_qobject::interpreter_event (const meth_callback& meth)
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133 {
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134 if (! m_interpreter)
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135 return;
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136
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137 event_manager& evmgr = m_interpreter->get_event_manager ();
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138
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139 evmgr.post_event (meth);
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140 }
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141
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142 qt_interpreter_events * interpreter_qobject::qt_link (void)
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143 {
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144 return m_octave_qobj.qt_link ();
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145 }
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146 }