comparison: sources/interface.cpp
sources/interface.cpp
- changeset 14
- 33b8f428bacb
- child 15
- 33da84af4bba
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| 13:09dcaeaa216b | 14:33b8f428bacb |
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| 1 /* | |
| 2 Copyright 2014 Teemu Piippo | |
| 3 All rights reserved. | |
| 4 | |
| 5 Redistribution and use in source and binary forms, with or without | |
| 6 modification, are permitted provided that the following conditions | |
| 7 are met: | |
| 8 | |
| 9 1. Redistributions of source code must retain the above copyright | |
| 10 notice, this list of conditions and the following disclaimer. | |
| 11 2. Redistributions in binary form must reproduce the above copyright | |
| 12 notice, this list of conditions and the following disclaimer in the | |
| 13 documentation and/or other materials provided with the distribution. | |
| 14 3. Neither the name of the copyright holder nor the names of its | |
| 15 contributors may be used to endorse or promote products derived from | |
| 16 this software without specific prior written permission. | |
| 17 | |
| 18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| 20 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
| 21 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER | |
| 22 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 23 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 24 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 25 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 26 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 27 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include <string.h> | |
| 32 #include "interface.h" | |
| 33 | |
| 34 static String g_input; | |
| 35 static int g_cursor = 0; | |
| 36 static int g_pan = 0; | |
| 37 static bool g_needRefresh = false; | |
| 38 | |
| 39 // ------------------------------------------------------------------------------------------------- | |
| 40 // | |
| 41 static FUNCTION | |
| 42 interface_sessions_width() -> int | |
| 43 { | |
| 44 return COLS / 3; | |
| 45 } | |
| 46 | |
| 47 // ------------------------------------------------------------------------------------------------- | |
| 48 // | |
| 49 static FUNCTION | |
| 50 interface_render_titlebar() -> void | |
| 51 { | |
| 52 String versionText = format (APPNAME " %1 (%2)", | |
| 53 full_version_string(), changeset_date_string()); | |
| 54 | |
| 55 if (versionText.length() <= COLS) | |
| 56 mvprintw (0, (COLS - versionText.length()) / 2, "%s", versionText.chars()); | |
| 57 } | |
| 58 | |
| 59 // ------------------------------------------------------------------------------------------------- | |
| 60 // | |
| 61 static FUNCTION | |
| 62 interface_render_log_area() -> void | |
| 63 { | |
| 64 | |
| 65 } | |
| 66 | |
| 67 // ------------------------------------------------------------------------------------------------- | |
| 68 // | |
| 69 static FUNCTION | |
| 70 interface_render_input() -> void | |
| 71 { | |
| 72 static char prompt[] = "> "; | |
| 73 int displaylength = COLS - strlen (prompt) - 1; | |
| 74 int y = LINES - 2; | |
| 75 | |
| 76 // Ensure that the cursor is always in view, adjust panning if this is not the case | |
| 77 if (g_cursor > g_pan + displaylength) | |
| 78 g_pan = g_cursor - displaylength; // cursor went too far right | |
| 79 else if (g_cursor < g_pan) | |
| 80 g_pan = g_cursor; // cursor went past the pan value to the left | |
| 81 | |
| 82 int start = g_pan; | |
| 83 int end = min<int> (g_input.length(), start + displaylength); | |
| 84 assert (g_cursor >= start and g_cursor <= end); | |
| 85 String displayTextBegin = g_input.mid (start, g_cursor); | |
| 86 String displayTextEnd = g_input.mid (g_cursor, end); | |
| 87 | |
| 88 // Clear, but only as much as is necessary. I want to avoid clearing the entire line to save | |
| 89 // bandwidth over SSH connections. Perhaps needlessly? I'm paranoid. | |
| 90 int renderLength = strlen (prompt) + displayTextBegin.length() + displayTextEnd.length(); | |
| 91 static int lastRenderLength = 0; | |
| 92 | |
| 93 if (lastRenderLength > renderLength) | |
| 94 mvhline (y, renderLength, ' ', lastRenderLength - renderLength); | |
| 95 | |
| 96 lastRenderLength = renderLength; | |
| 97 | |
| 98 // Render the input line, with the part of the input string that's before the cursor written | |
| 99 // AFTER the part that comes afterwards. This is to ensure that the cursor is placed at the | |
| 100 // position where our cursor is. It looks nice like that. :) | |
| 101 mvprintw (y, 0, "%s", prompt); | |
| 102 mvprintw (y, strlen (prompt) + displayTextBegin.length(), "%s", displayTextEnd.chars()); | |
| 103 mvprintw (y, strlen (prompt), "%s", displayTextBegin.chars()); | |
| 104 g_needRefresh = true; | |
| 105 } | |
| 106 | |
| 107 // ------------------------------------------------------------------------------------------------- | |
| 108 // | |
| 109 static FUNCTION | |
| 110 interface_render_statusbar() -> void | |
| 111 { | |
| 112 | |
| 113 } | |
| 114 | |
| 115 // ------------------------------------------------------------------------------------------------- | |
| 116 // | |
| 117 static FUNCTION | |
| 118 interface_render_full() -> void | |
| 119 { | |
| 120 interface_render_titlebar(); | |
| 121 interface_render_log_area(); | |
| 122 interface_render_statusbar(); | |
| 123 interface_render_input(); | |
| 124 g_needRefresh = true; | |
| 125 } | |
| 126 | |
| 127 // ------------------------------------------------------------------------------------------------- | |
| 128 // | |
| 129 FUNCTION | |
| 130 Interface::initialize() -> void | |
| 131 { | |
| 132 ::initscr(); | |
| 133 ::start_color(); | |
| 134 ::raw(); | |
| 135 ::keypad (stdscr, true); | |
| 136 ::noecho(); | |
| 137 ::refresh(); | |
| 138 ::timeout (0); | |
| 139 interface_render_full(); | |
| 140 refresh(); | |
| 141 g_needRefresh = false; | |
| 142 } | |
| 143 | |
| 144 // ------------------------------------------------------------------------------------------------- | |
| 145 // | |
| 146 FUNCTION | |
| 147 Interface::handle_input() -> void | |
| 148 { | |
| 149 int ch = ::getch(); | |
| 150 | |
| 151 if (ch == KEY_F(1)) | |
| 152 { | |
| 153 endwin(); | |
| 154 exit (EXIT_SUCCESS); | |
| 155 } | |
| 156 else if (ch >= 0x20 and ch <= 0x7E) | |
| 157 { | |
| 158 g_input.insert (g_cursor++, char (ch)); | |
| 159 interface_render_input(); | |
| 160 refresh(); | |
| 161 } | |
| 162 else if (ch == KEY_LEFT) | |
| 163 { | |
| 164 if (g_cursor > 0) | |
| 165 { | |
| 166 g_cursor--; | |
| 167 interface_render_input(); | |
| 168 } | |
| 169 } | |
| 170 else if (ch == KEY_RIGHT) | |
| 171 { | |
| 172 if (g_cursor < g_input.length()) | |
| 173 { | |
| 174 g_cursor++; | |
| 175 interface_render_input(); | |
| 176 } | |
| 177 } | |
| 178 else if (ch == KEY_HOME) | |
| 179 { | |
| 180 if (g_cursor != 0) | |
| 181 { | |
| 182 g_cursor = 0; | |
| 183 interface_render_input(); | |
| 184 } | |
| 185 } | |
| 186 else if (ch == KEY_END) | |
| 187 { | |
| 188 if (g_cursor != g_input.length()) | |
| 189 { | |
| 190 g_cursor = g_input.length(); | |
| 191 interface_render_input(); | |
| 192 } | |
| 193 } | |
| 194 else if (ch == KEY_BACKSPACE) | |
| 195 { | |
| 196 if (not g_input.is_empty() and g_cursor > 0) | |
| 197 { | |
| 198 g_input.remove_at (--g_cursor); | |
| 199 interface_render_input(); | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 if (g_needRefresh) | |
| 204 { | |
| 205 refresh(); | |
| 206 g_needRefresh = false; | |
| 207 } | |
| 208 } | |
| 209 | |
| 210 FUNCTION print_to_console (const String& a) -> void | |
| 211 { | |
| 212 | |
| 213 } |
