summaryrefslogtreecommitdiff
path: root/ted.c
blob: 5ad3f82e6ab07d52daf10cef21c5e2a70483adcd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
static void menu_open(Ted *ted, Menu menu);

// this is a macro so we get -Wformat warnings
#define ted_seterr(ted, ...) \
	snprintf((ted)->error, sizeof (ted)->error - 1, __VA_ARGS__)

void ted_seterr_to_buferr(Ted *ted, TextBuffer *buffer) {
	size_t size = sizeof ted->error;
	if (sizeof buffer->error < size) size = sizeof buffer->error;
	memcpy(ted->error, buffer->error, size);
}

bool ted_haserr(Ted *ted) {
	return ted->error[0] != '\0';
}

char const *ted_geterr(Ted *ted) {
	return ted->error;
}

void ted_clearerr(Ted *ted) {
	ted->error[0] = '\0';
}

static void ted_out_of_mem(Ted *ted) {
	ted_seterr(ted, "Out of memory.");
}

static void *ted_malloc(Ted *ted, size_t size) {
	void *ret = malloc(size);
	if (!ret) ted_out_of_mem(ted);
	return ret;
}

static void *ted_calloc(Ted *ted, size_t n, size_t size) {
	void *ret = calloc(n, size);
	if (!ret) ted_out_of_mem(ted);
	return ret;
}

static void *ted_realloc(Ted *ted, void *p, size_t new_size) {
	void *ret = realloc(p, new_size);
	if (!ret) ted_out_of_mem(ted);
	return ret;
}

// Check the various places a file could be, and return the full path.
static Status ted_get_file(Ted const *ted, char const *name, char *out, size_t outsz) {
	if (ted->search_cwd && fs_file_exists(name)) {
		// check in current working directory
		str_cpy(out, outsz, name);
		return true;
	}
	if (*ted->local_data_dir) {
		str_printf(out, outsz, "%s" PATH_SEPARATOR_STR "%s", ted->local_data_dir, name);
		if (fs_file_exists(out))
			return true;
	}
	if (*ted->global_data_dir) {
		str_printf(out, outsz, "%s" PATH_SEPARATOR_STR "%s", ted->global_data_dir, name);
		if (fs_file_exists(out))
			return true;
	}
	return false;
}

// Loads font from filename into *out, freeing any font that was previously there.
// *out is left unchanged on failure.
static void ted_load_font(Ted *ted, char const *filename, Font **out) {
	char font_filename[TED_PATH_MAX];
	if (ted_get_file(ted, filename, font_filename, sizeof font_filename)) {
		Font *font = text_font_load(font_filename, ted->settings.text_size);
		if (font) {
			if (*out) {
				text_font_free(*out);
			}
			*out = font;
		} else {
			ted_seterr(ted, "Couldn't load font: %s", text_get_err());
			text_clear_err();
		}
	} else {
		ted_seterr(ted, "Couldn't find font file. There is probably a problem with your ted installation.");
	}
	
}

// Load all the fonts ted will use.
static void ted_load_fonts(Ted *ted) {
	ted_load_font(ted, "assets/font.ttf", &ted->font);
	ted_load_font(ted, "assets/font-bold.ttf", &ted->font_bold);
}

// returns the index of an available buffer, or -1 if none are available 
static i32 ted_new_buffer(Ted *ted) {
	bool *buffers_used = ted->buffers_used;
	for (i32 i = 0; i < TED_MAX_BUFFERS; ++i) {
		if (!buffers_used[i]) {
			buffers_used[i] = true;
			buffer_create(&ted->buffers[i], ted);
			return i;
		}
	}
	return -1;
}

// Opposite of ted_new_buffer
// Make sure you set active_buffer to something else if you delete it!
static void ted_delete_buffer(Ted *ted, u16 index) {
	TextBuffer *buffer = &ted->buffers[index];
	if (buffer == ted->active_buffer)
		ted->active_buffer = NULL; // make sure we don't set the active buffer to something invalid
	buffer_free(buffer);
	ted->buffers_used[index] = false;
}

// Returns the index of an available node, or -1 if none are available 
static i32 ted_new_node(Ted *ted) {
	bool *nodes_used = ted->nodes_used;
	for (i32 i = 0; i < TED_MAX_NODES; ++i) {
		if (!nodes_used[i]) {
			memset(&ted->nodes[i], 0, sizeof ted->nodes[i]); // zero new node
			nodes_used[i] = true;
			return i;
		}
	}
	ted_seterr(ted, "Too many nodes.");
	return -1;
	
}

static bool node_tab_close(Ted *ted, Node *node, u16 index);

// Open a new buffer. Fills out *tab to the index of the tab used, and *buffer_idx to the index of the buffer.
// Returns true on success.
static Status ted_open_buffer(Ted *ted, u16 *buffer_idx, u16 *tab) {
	i32 new_buffer_index = ted_new_buffer(ted);
	if (new_buffer_index >= 0) {
		Node *node = ted->active_node;
		if (!node) {
			// no active node; let's create one!
			i32 node_idx = ted_new_node(ted);
			if (node_idx >= 0) {
				node = &ted->nodes[node_idx];
				ted->active_node = node;
			} else {
				ted_delete_buffer(ted, (u16)new_buffer_index);
				return false;
			}
		}
		if (arr_len(node->tabs) < TED_MAX_TABS) {
			arr_add(node->tabs, (u16)new_buffer_index);
			TextBuffer *new_buffer = &ted->buffers[new_buffer_index];
			ted->active_buffer = new_buffer;
			node->active_tab = (u16)(arr_len(node->tabs) - 1);
			*buffer_idx = (u16)new_buffer_index;
			*tab = node->active_tab;
			return true;
		} else {
			ted_seterr(ted, "Too many tabs.");
			ted_delete_buffer(ted, (u16)new_buffer_index);
			return false;
		}
	} else {
		return false;
	}
}

// sets the active buffer to this buffer, and updates active_node, etc. accordingly
static void ted_switch_to_buffer(Ted *ted, u16 buffer_idx) {
	ted->active_buffer = &ted->buffers[buffer_idx];
	// now we need to figure out where this buffer is
	bool *nodes_used = ted->nodes_used;
	for (u16 i = 0; i < TED_MAX_NODES; ++i) {
		if (nodes_used[i]) {
			Node *node = &ted->nodes[i];
			arr_foreach_ptr(node->tabs, u16, tab) {
				if (buffer_idx == *tab) {
					node->active_tab = (u16)(tab - node->tabs);
					ted->active_node = node;
					return;
				}
			}
		}
	}
	assert(0);
}

// Returns true on success
static bool ted_open_file(Ted *ted, char const *filename) {
	// first, check if file is already open
	bool *buffers_used = ted->buffers_used;
	TextBuffer *buffers = ted->buffers;
	for (u16 i = 0; i < TED_MAX_BUFFERS; ++i) {
		if (buffers_used[i]) {
			if (streq(filename, buffer_get_filename(&buffers[i]))) {
				buffer_reload(&buffers[i]); // make sure buffer is up to date with the file
				ted_switch_to_buffer(ted, i);
				return true;
			}
		}
	}
	
	// not open; we need to load it
	u16 buffer_idx, tab_idx;
	if (ted->active_buffer && buffer_is_untitled(ted->active_buffer) && buffer_empty(ted->active_buffer)) {
		// the active buffer is just an empty untitled buffer. open it here.
		return buffer_load_file(ted->active_buffer, filename);
	} else if (ted_open_buffer(ted, &buffer_idx, &tab_idx)) {
		TextBuffer *buffer = &ted->buffers[buffer_idx];
		if (buffer_load_file(buffer, filename)) {
			return true;
		} else {
			ted_seterr_to_buferr(ted, buffer);
			node_tab_close(ted, ted->active_node, tab_idx);
			ted_delete_buffer(ted, (u16)buffer_idx);
			return false;
		}
	} else {
		return false;
	}
}

static bool ted_new_file(Ted *ted) {
	u16 buffer_idx, tab_idx;
	if (ted_open_buffer(ted, &buffer_idx, &tab_idx)) {
		TextBuffer *buffer = &ted->buffers[buffer_idx];
		buffer_new_file(buffer, TED_UNTITLED);
		if (!buffer_haserr(buffer)) {
			return true;
		} else {
			ted_seterr_to_buferr(ted, buffer);
			node_tab_close(ted, ted->active_node, tab_idx);
			ted_delete_buffer(ted, (u16)buffer_idx);
			return false;
		}
	} else {
		return false;
	}
}


// save all changes to all buffers with unsaved changes.
// returns true if all buffers were saved successfully
static bool ted_save_all(Ted *ted) {
	bool success = true;
	bool *buffers_used = ted->buffers_used;
	for (u16 i = 0; i < TED_MAX_BUFFERS; ++i) {
		if (buffers_used[i]) {
			TextBuffer *buffer = &ted->buffers[i];
			if (buffer_unsaved_changes(buffer)) {
				if (buffer->filename && buffer_is_untitled(buffer)) {
					ted_switch_to_buffer(ted, i);
					menu_open(ted, MENU_SAVE_AS);
					success = false; // we haven't saved this buffer yet; we've just opened the "save as" menu.
					break;
				} else {
					if (!buffer_save(buffer))
						success = false;
				}
			}
		}
	}
	return success;
}

static void ted_full_path(Ted *ted, char const *relpath, char *abspath, size_t abspath_size) {
	path_full(ted->cwd, relpath, abspath, abspath_size);
}