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annotate src/libvterm/include/vterm.h @ 18478:94223687df0e

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Added tag v8.1.2233 for changeset e93cab5d0f0f27fad7882f1f412927df055b090d
author Bram Moolenaar <Bram@vim.org>
date Tue, 29 Oct 2019 04:30:05 +0100
parents e8d1f3209dcd
children 3be01cf0a632
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * NOTE: This is a MODIFIED version of libvterm, see the README file.
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3 */
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4 #ifndef __VTERM_H__
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5 #define __VTERM_H__
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6
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7 #ifdef __cplusplus
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8 extern "C" {
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9 #endif
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10
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11 #include <stdlib.h>
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12
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13 #include "vterm_keycodes.h"
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14
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15 #define TRUE 1
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16 #define FALSE 0
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17
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18 // from stdint.h
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19 typedef unsigned char uint8_t;
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20 typedef unsigned int uint32_t;
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21
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22 typedef struct VTerm VTerm;
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23 typedef struct VTermState VTermState;
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24 typedef struct VTermScreen VTermScreen;
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25
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26 // Specifies a screen point.
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27 typedef struct {
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28 int row;
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29 int col;
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30 } VTermPos;
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31
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32 /*
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33 * Some small utility functions; we can just keep these static here.
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34 */
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35
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36 /*
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37 * Order points by on-screen flow order:
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38 * Return < 0 if "a" is before "b"
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39 * Return 0 if "a" and "b" are equal
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40 * Return > 0 if "a" is after "b".
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41 */
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42 int vterm_pos_cmp(VTermPos a, VTermPos b);
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43
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44 #if defined(DEFINE_INLINES) || USE_INLINE
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45 INLINE int vterm_pos_cmp(VTermPos a, VTermPos b)
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46 {
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47 return (a.row == b.row) ? a.col - b.col : a.row - b.row;
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48 }
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49 #endif
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50
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51 // Specifies a rectangular screen area.
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52 typedef struct {
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53 int start_row;
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54 int end_row;
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55 int start_col;
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56 int end_col;
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57 } VTermRect;
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58
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59 // Return true if the rect "r" contains the point "p".
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60 int vterm_rect_contains(VTermRect r, VTermPos p);
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61
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62 #if defined(DEFINE_INLINES) || USE_INLINE
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63 INLINE int vterm_rect_contains(VTermRect r, VTermPos p)
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64 {
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65 return p.row >= r.start_row && p.row < r.end_row &&
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66 p.col >= r.start_col && p.col < r.end_col;
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67 }
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68 #endif
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69
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70 // Move "rect" "row_delta" down and "col_delta" right.
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71 // Does not check boundaries.
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72 void vterm_rect_move(VTermRect *rect, int row_delta, int col_delta);
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73
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74 #if defined(DEFINE_INLINES) || USE_INLINE
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75 INLINE void vterm_rect_move(VTermRect *rect, int row_delta, int col_delta)
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76 {
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77 rect->start_row += row_delta; rect->end_row += row_delta;
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78 rect->start_col += col_delta; rect->end_col += col_delta;
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79 }
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80 #endif
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81
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82 // The ansi_index is used for the lower 16 colors, which can be set to any
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83 // color.
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84 #define VTERM_ANSI_INDEX_DEFAULT 0 // color cleared
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85 #define VTERM_ANSI_INDEX_MIN 1
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86 #define VTERM_ANSI_INDEX_MAX 16
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87 #define VTERM_ANSI_INDEX_NONE 255 // non-ANSI color, use red/green/blue
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88
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89 typedef struct {
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90 uint8_t red, green, blue;
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91 uint8_t ansi_index;
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92 } VTermColor;
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93
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94 typedef enum {
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95 // VTERM_VALUETYPE_NONE = 0
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96 VTERM_VALUETYPE_BOOL = 1,
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97 VTERM_VALUETYPE_INT,
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98 VTERM_VALUETYPE_STRING,
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99 VTERM_VALUETYPE_COLOR,
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100
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101 VTERM_N_VALUETYPES
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102 } VTermValueType;
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103
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104 typedef union {
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105 int boolean;
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106 int number;
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107 char *string;
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108 VTermColor color;
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109 } VTermValue;
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110
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111 typedef enum {
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112 // VTERM_ATTR_NONE = 0
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113 VTERM_ATTR_BOLD = 1, // bool: 1, 22
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114 VTERM_ATTR_UNDERLINE, // number: 4, 21, 24
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115 VTERM_ATTR_ITALIC, // bool: 3, 23
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116 VTERM_ATTR_BLINK, // bool: 5, 25
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117 VTERM_ATTR_REVERSE, // bool: 7, 27
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118 VTERM_ATTR_STRIKE, // bool: 9, 29
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119 VTERM_ATTR_FONT, // number: 10-19
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120 VTERM_ATTR_FOREGROUND, // color: 30-39 90-97
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121 VTERM_ATTR_BACKGROUND, // color: 40-49 100-107
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122
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123 VTERM_N_ATTRS
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124 } VTermAttr;
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125
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126 typedef enum {
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127 // VTERM_PROP_NONE = 0
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128 VTERM_PROP_CURSORVISIBLE = 1, // bool
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129 VTERM_PROP_CURSORBLINK, // bool
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130 VTERM_PROP_ALTSCREEN, // bool
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131 VTERM_PROP_TITLE, // string
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132 VTERM_PROP_ICONNAME, // string
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133 VTERM_PROP_REVERSE, // bool
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134 VTERM_PROP_CURSORSHAPE, // number
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135 VTERM_PROP_MOUSE, // number
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136 VTERM_PROP_CURSORCOLOR, // string
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137
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138 VTERM_N_PROPS
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139 } VTermProp;
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140
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141 enum {
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142 VTERM_PROP_CURSORSHAPE_BLOCK = 1,
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143 VTERM_PROP_CURSORSHAPE_UNDERLINE,
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144 VTERM_PROP_CURSORSHAPE_BAR_LEFT,
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145
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146 VTERM_N_PROP_CURSORSHAPES
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147 };
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148
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149 enum {
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150 VTERM_PROP_MOUSE_NONE = 0,
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151 VTERM_PROP_MOUSE_CLICK,
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152 VTERM_PROP_MOUSE_DRAG,
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153 VTERM_PROP_MOUSE_MOVE,
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154
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155 VTERM_N_PROP_MOUSES
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156 };
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157
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158 typedef struct {
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159 const uint32_t *chars;
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160 int width;
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161 unsigned int protected_cell:1; // DECSCA-protected against DECSEL/DECSED
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162 unsigned int dwl:1; // DECDWL or DECDHL double-width line
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163 unsigned int dhl:2; // DECDHL double-height line (1=top 2=bottom)
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164 } VTermGlyphInfo;
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165
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166 typedef struct {
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167 unsigned int doublewidth:1; // DECDWL or DECDHL line
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168 unsigned int doubleheight:2; // DECDHL line (1=top 2=bottom)
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169 } VTermLineInfo;
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170
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171 typedef struct {
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172 // libvterm relies on the allocated memory to be zeroed out before it is
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173 // returned by the allocator.
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174 void *(*malloc)(size_t size, void *allocdata);
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175 void (*free)(void *ptr, void *allocdata);
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176 } VTermAllocatorFunctions;
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177
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178 // Allocate and initialize a new terminal with default allocators.
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179 VTerm *vterm_new(int rows, int cols);
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180
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181 // Allocate and initialize a new terminal with specified allocators.
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182 VTerm *vterm_new_with_allocator(int rows, int cols, VTermAllocatorFunctions *funcs, void *allocdata);
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183
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184 // Free and cleanup a terminal and all its data.
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185 void vterm_free(VTerm* vt);
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186
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187 // Get the current size of the terminal and store in "rowsp" and "colsp".
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188 void vterm_get_size(const VTerm *vt, int *rowsp, int *colsp);
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189
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190 void vterm_set_size(VTerm *vt, int rows, int cols);
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191
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192 int vterm_get_utf8(const VTerm *vt);
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193 void vterm_set_utf8(VTerm *vt, int is_utf8);
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194
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195 size_t vterm_input_write(VTerm *vt, const char *bytes, size_t len);
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196
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197 size_t vterm_output_get_buffer_size(const VTerm *vt);
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198 size_t vterm_output_get_buffer_current(const VTerm *vt);
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199 size_t vterm_output_get_buffer_remaining(const VTerm *vt);
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200
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201 size_t vterm_output_read(VTerm *vt, char *buffer, size_t len);
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202
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203 int vterm_is_modify_other_keys(VTerm *vt);
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204 void vterm_keyboard_unichar(VTerm *vt, uint32_t c, VTermModifier mod);
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205 void vterm_keyboard_key(VTerm *vt, VTermKey key, VTermModifier mod);
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206
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207 void vterm_keyboard_start_paste(VTerm *vt);
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208 void vterm_keyboard_end_paste(VTerm *vt);
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209
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210 void vterm_mouse_move(VTerm *vt, int row, int col, VTermModifier mod);
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211 // "button" is 1 for left, 2 for middle, 3 for right.
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212 // Button 4 is scroll wheel down, button 5 is scroll wheel up.
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213 void vterm_mouse_button(VTerm *vt, int button, int pressed, VTermModifier mod);
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214
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215 // ------------
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216 // Parser layer
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217 // ------------
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218
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219 /* Flag to indicate non-final subparameters in a single CSI parameter.
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220 * Consider
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221 * CSI 1;2:3:4;5a
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222 * 1 4 and 5 are final.
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223 * 2 and 3 are non-final and will have this bit set
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224 *
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225 * Don't confuse this with the final byte of the CSI escape; 'a' in this case.
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226 */
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227 #define CSI_ARG_FLAG_MORE (1U<<31)
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228 #define CSI_ARG_MASK (~(1U<<31))
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229
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230 #define CSI_ARG_HAS_MORE(a) ((a) & CSI_ARG_FLAG_MORE)
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231 #define CSI_ARG(a) ((a) & CSI_ARG_MASK)
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232
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233 // Can't use -1 to indicate a missing argument; use this instead
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234 #define CSI_ARG_MISSING ((1<<30)-1)
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235
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236 #define CSI_ARG_IS_MISSING(a) (CSI_ARG(a) == CSI_ARG_MISSING)
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237 #define CSI_ARG_OR(a,def) (CSI_ARG(a) == CSI_ARG_MISSING ? (def) : CSI_ARG(a))
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238 #define CSI_ARG_COUNT(a) (CSI_ARG(a) == CSI_ARG_MISSING || CSI_ARG(a) == 0 ? 1 : CSI_ARG(a))
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239
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240 typedef struct {
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241 int (*text)(const char *bytes, size_t len, void *user);
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242 int (*control)(unsigned char control, void *user);
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243 int (*escape)(const char *bytes, size_t len, void *user);
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244 int (*csi)(const char *leader, const long args[], int argcount, const char *intermed, char command, void *user);
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245 int (*osc)(const char *command, size_t cmdlen, void *user);
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246 int (*dcs)(const char *command, size_t cmdlen, void *user);
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247 int (*resize)(int rows, int cols, void *user);
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248 } VTermParserCallbacks;
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249
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250 void vterm_parser_set_callbacks(VTerm *vt, const VTermParserCallbacks *callbacks, void *user);
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251 void *vterm_parser_get_cbdata(VTerm *vt);
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252
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253 // -----------
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254 // State layer
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255 // -----------
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256
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257 typedef struct {
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258 int (*putglyph)(VTermGlyphInfo *info, VTermPos pos, void *user);
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259 int (*movecursor)(VTermPos pos, VTermPos oldpos, int visible, void *user);
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260 int (*scrollrect)(VTermRect rect, int downward, int rightward, void *user);
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261 int (*moverect)(VTermRect dest, VTermRect src, void *user);
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262 int (*erase)(VTermRect rect, int selective, void *user);
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263 int (*initpen)(void *user);
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264 int (*setpenattr)(VTermAttr attr, VTermValue *val, void *user);
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265 // Callback for setting various properties. Must return 1 if the property
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266 // was accepted, 0 otherwise.
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267 int (*settermprop)(VTermProp prop, VTermValue *val, void *user);
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268 int (*bell)(void *user);
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269 int (*resize)(int rows, int cols, VTermPos *delta, void *user);
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270 int (*setlineinfo)(int row, const VTermLineInfo *newinfo, const VTermLineInfo *oldinfo, void *user);
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271 } VTermStateCallbacks;
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272
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273 typedef struct {
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274 VTermPos pos;
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275 int buttons;
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276 #define MOUSE_BUTTON_LEFT 0x01
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277 #define MOUSE_BUTTON_MIDDLE 0x02
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278 #define MOUSE_BUTTON_RIGHT 0x04
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279 int flags;
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280 #define MOUSE_WANT_CLICK 0x01
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281 #define MOUSE_WANT_DRAG 0x02
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282 #define MOUSE_WANT_MOVE 0x04
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283 // useful to add protocol?
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284 } VTermMouseState;
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285
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286 VTermState *vterm_obtain_state(VTerm *vt);
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287
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288 void vterm_state_set_callbacks(VTermState *state, const VTermStateCallbacks *callbacks, void *user);
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289 void *vterm_state_get_cbdata(VTermState *state);
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290
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291 // Only invokes control, csi, osc, dcs
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292 void vterm_state_set_unrecognised_fallbacks(VTermState *state, const VTermParserCallbacks *fallbacks, void *user);
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293 void *vterm_state_get_unrecognised_fbdata(VTermState *state);
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294
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295 // Initialize the state.
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296 void vterm_state_reset(VTermState *state, int hard);
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297
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298 void vterm_state_get_cursorpos(const VTermState *state, VTermPos *cursorpos);
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299 void vterm_state_get_mousestate(const VTermState *state, VTermMouseState *mousestate);
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300 void vterm_state_get_default_colors(const VTermState *state, VTermColor *default_fg, VTermColor *default_bg);
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301 void vterm_state_get_palette_color(const VTermState *state, int index, VTermColor *col);
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302 void vterm_state_set_default_colors(VTermState *state, const VTermColor *default_fg, const VTermColor *default_bg);
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303 void vterm_state_set_palette_color(VTermState *state, int index, const VTermColor *col);
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304 void vterm_state_set_bold_highbright(VTermState *state, int bold_is_highbright);
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305 int vterm_state_get_penattr(const VTermState *state, VTermAttr attr, VTermValue *val);
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306 int vterm_state_set_termprop(VTermState *state, VTermProp prop, VTermValue *val);
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307 void vterm_state_focus_in(VTermState *state);
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308 void vterm_state_focus_out(VTermState *state);
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309 const VTermLineInfo *vterm_state_get_lineinfo(const VTermState *state, int row);
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310
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311 // ------------
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312 // Screen layer
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313 // ------------
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314
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315 typedef struct {
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316 unsigned int bold : 1;
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317 unsigned int underline : 2;
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318 unsigned int italic : 1;
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319 unsigned int blink : 1;
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320 unsigned int reverse : 1;
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321 unsigned int strike : 1;
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322 unsigned int font : 4; // 0 to 9
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323 unsigned int dwl : 1; // On a DECDWL or DECDHL line
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324 unsigned int dhl : 2; // On a DECDHL line (1=top 2=bottom)
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325 } VTermScreenCellAttrs;
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326
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327 typedef struct {
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328 #define VTERM_MAX_CHARS_PER_CELL 6
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329 uint32_t chars[VTERM_MAX_CHARS_PER_CELL];
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330 char width;
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331 VTermScreenCellAttrs attrs;
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332 VTermColor fg, bg;
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333 } VTermScreenCell;
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334
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335 // All fields are optional, NULL when not used.
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336 typedef struct {
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337 int (*damage)(VTermRect rect, void *user);
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338 int (*moverect)(VTermRect dest, VTermRect src, void *user);
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339 int (*movecursor)(VTermPos pos, VTermPos oldpos, int visible, void *user);
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340 int (*settermprop)(VTermProp prop, VTermValue *val, void *user);
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341 int (*bell)(void *user);
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342 int (*resize)(int rows, int cols, void *user);
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343 // A line was pushed off the top of the window.
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344 // "cells[cols]" contains the cells of that line.
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345 // Return value is unused.
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346 int (*sb_pushline)(int cols, const VTermScreenCell *cells, void *user);
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347 int (*sb_popline)(int cols, VTermScreenCell *cells, void *user);
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348 } VTermScreenCallbacks;
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349
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350 // Return the screen of the vterm.
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351 VTermScreen *vterm_obtain_screen(VTerm *vt);
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352
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353 /*
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354 * Install screen callbacks. These are invoked when the screen contents is
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355 * changed. "user" is passed into to the callback.
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356 */
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357 void vterm_screen_set_callbacks(VTermScreen *screen, const VTermScreenCallbacks *callbacks, void *user);
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358 void *vterm_screen_get_cbdata(VTermScreen *screen);
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359
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360 /* Only invokes control, csi, osc, dcs */
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361 void vterm_screen_set_unrecognised_fallbacks(VTermScreen *screen, const VTermParserCallbacks *fallbacks, void *user);
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362 void *vterm_screen_get_unrecognised_fbdata(VTermScreen *screen);
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363
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364 // Enable support for using the alternate screen if "altscreen" is non-zero.
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365 // Before that switching to the alternate screen won't work.
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366 // Calling with "altscreen" zero has no effect.
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367 void vterm_screen_enable_altscreen(VTermScreen *screen, int altscreen);
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368
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369 typedef enum {
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370 VTERM_DAMAGE_CELL, // every cell
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371 VTERM_DAMAGE_ROW, // entire rows
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372 VTERM_DAMAGE_SCREEN, // entire screen
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373 VTERM_DAMAGE_SCROLL, // entire screen + scrollrect
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374
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375 VTERM_N_DAMAGES
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376 } VTermDamageSize;
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377
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378 // Invoke the relevant callbacks to update the screen.
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379 void vterm_screen_flush_damage(VTermScreen *screen);
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380
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381 void vterm_screen_set_damage_merge(VTermScreen *screen, VTermDamageSize size);
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382
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383 /*
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384 * Reset the screen. Also invokes vterm_state_reset().
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385 * Must be called before the terminal can be used.
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386 */
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387 void vterm_screen_reset(VTermScreen *screen, int hard);
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388
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389 // Neither of these functions NUL-terminate the buffer
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390 size_t vterm_screen_get_chars(const VTermScreen *screen, uint32_t *chars, size_t len, const VTermRect rect);
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391 size_t vterm_screen_get_text(const VTermScreen *screen, char *str, size_t len, const VTermRect rect);
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392
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393 typedef enum {
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394 VTERM_ATTR_BOLD_MASK = 1 << 0,
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395 VTERM_ATTR_UNDERLINE_MASK = 1 << 1,
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396 VTERM_ATTR_ITALIC_MASK = 1 << 2,
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397 VTERM_ATTR_BLINK_MASK = 1 << 3,
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398 VTERM_ATTR_REVERSE_MASK = 1 << 4,
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399 VTERM_ATTR_STRIKE_MASK = 1 << 5,
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400 VTERM_ATTR_FONT_MASK = 1 << 6,
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401 VTERM_ATTR_FOREGROUND_MASK = 1 << 7,
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402 VTERM_ATTR_BACKGROUND_MASK = 1 << 8,
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403
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404 VTERM_ALL_ATTRS_MASK = (1 << 9) - 1
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405 } VTermAttrMask;
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406
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407 int vterm_screen_get_attrs_extent(const VTermScreen *screen, VTermRect *extent, VTermPos pos, VTermAttrMask attrs);
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408
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409 int vterm_screen_get_cell(const VTermScreen *screen, VTermPos pos, VTermScreenCell *cell);
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410
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411 int vterm_screen_is_eol(const VTermScreen *screen, VTermPos pos);
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412
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413 // ---------
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414 // Utilities
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415 // ---------
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416
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417 VTermValueType vterm_get_attr_type(VTermAttr attr);
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418 VTermValueType vterm_get_prop_type(VTermProp prop);
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419
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420 void vterm_scroll_rect(VTermRect rect,
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421 int downward,
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422 int rightward,
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423 int (*moverect)(VTermRect src, VTermRect dest, void *user),
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424 int (*eraserect)(VTermRect rect, int selective, void *user),
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425 void *user);
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426
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427 void vterm_copy_cells(VTermRect dest,
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428 VTermRect src,
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429 void (*copycell)(VTermPos dest, VTermPos src, void *user),
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430 void *user);
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431
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432 #ifdef __cplusplus
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433 }
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434 #endif
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435
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436 #endif