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
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
|
#include "documentwidget.h"
#include "scrollwidget.h"
#include "paint.h"
#include "command.h"
#include "util.h"
#include "app.h"
#include "../gemini.h"
#include "../gmdocument.h"
#include <the_Foundation/file.h>
#include <the_Foundation/path.h>
#include <the_Foundation/ptrarray.h>
#include <the_Foundation/regexp.h>
#include <the_Foundation/tlsrequest.h>
enum iDocumentState {
blank_DocumentState,
fetching_DocumentState,
layout_DocumentState,
ready_DocumentState,
};
struct Impl_DocumentWidget {
iWidget widget;
enum iDocumentState state;
iString *url;
iTlsRequest *request;
int statusCode;
iString *newSource;
iGmDocument *doc;
int pageMargin;
int scrollY;
iPtrArray visibleLinks;
const iGmRun *hoverLink;
iClick click;
iScrollWidget *scroll;
};
iDeclareType(Url)
struct Impl_Url {
iRangecc protocol;
iRangecc host;
iRangecc port;
iRangecc path;
iRangecc query;
};
void init_Url(iUrl *d, const iString *text) {
iRegExp *pattern =
new_RegExp("(.+)://([^/:?]*)(:[0-9]+)?([^?]*)(\\?.*)?", caseInsensitive_RegExpOption);
iRegExpMatch m;
if (matchString_RegExp(pattern, text, &m)) {
d->protocol = capturedRange_RegExpMatch(&m, 1);
d->host = capturedRange_RegExpMatch(&m, 2);
d->port = capturedRange_RegExpMatch(&m, 3);
if (!isEmpty_Range(&d->port)) {
/* Don't include the colon. */
d->port.start++;
}
d->path = capturedRange_RegExpMatch(&m, 4);
d->query = capturedRange_RegExpMatch(&m, 5);
}
else {
iZap(*d);
}
iRelease(pattern);
}
iDefineObjectConstruction(DocumentWidget)
void init_DocumentWidget(iDocumentWidget *d) {
iWidget *w = as_Widget(d);
init_Widget(w);
setId_Widget(w, "document");
d->state = blank_DocumentState;
d->url = new_String();
d->statusCode = 0;
d->request = NULL;
d->newSource = new_String();
d->doc = new_GmDocument();
d->pageMargin = 5;
d->scrollY = 0;
d->hoverLink = NULL;
init_PtrArray(&d->visibleLinks);
init_Click(&d->click, d, SDL_BUTTON_LEFT);
addChild_Widget(w, iClob(d->scroll = new_ScrollWidget()));
}
void deinit_DocumentWidget(iDocumentWidget *d) {
deinit_PtrArray(&d->visibleLinks);
delete_String(d->url);
delete_String(d->newSource);
iRelease(d->doc);
}
static int documentWidth_DocumentWidget_(const iDocumentWidget *d) {
const iWidget *w = constAs_Widget(d);
const iRect bounds = bounds_Widget(w);
return iMini(bounds.size.x - gap_UI * d->pageMargin * 2, fontSize_UI * 40);
}
static iRect documentBounds_DocumentWidget_(const iDocumentWidget *d) {
const iRect bounds = bounds_Widget(constAs_Widget(d));
const int margin = gap_UI * d->pageMargin;
iRect rect;
rect.size.x = documentWidth_DocumentWidget_(d);
rect.pos.x = bounds.size.x / 2 - rect.size.x / 2;
rect.pos.y = top_Rect(bounds) + margin;
rect.size.y = height_Rect(bounds) - 2 * margin;
return rect;
}
#if 0
void setSource_DocumentWidget(iDocumentWidget *d, const iString *source) {
/* TODO: lock source during update */
setSource_GmDocument(d->doc, source, documentWidth_DocumentWidget_(d));
d->state = ready_DocumentState;
}
#endif
static iRangecc getLine_(iRangecc text) {
iRangecc line = { text.start, text.start };
for (; *line.end != '\n' && line.end != text.end; line.end++) {}
return line;
}
static void requestFinished_DocumentWidget_(iAnyObject *obj) {
iDocumentWidget *d = obj;
iBlock *response = readAll_TlsRequest(d->request);
iRangecc responseRange = { constBegin_Block(response), constEnd_Block(response) };
iRangecc respLine = getLine_(responseRange);
responseRange.start = respLine.end + 1;
/* First line is the status code. */ {
iString *line = newRange_String(respLine);
trim_String(line);
d->statusCode = toInt_String(line);
printf("response (%02d): %s\n", d->statusCode, cstr_String(line));
/* TODO: post a command with the status code */
switch (d->statusCode) {
case redirectPermanent_GmStatusCode:
case redirectTemporary_GmStatusCode:
postCommandf_App("open url:%s", cstr_String(line) + 3);
break;
}
delete_String(line);
}
setCStrN_String(d->newSource, responseRange.start, size_Range(&responseRange));
delete_Block(response);
iReleaseLater(d->request);
d->request = NULL;
fflush(stdout);
refresh_Widget(constAs_Widget(d));
}
static void fetch_DocumentWidget_(iDocumentWidget *d) {
iAssert(!d->request);
d->state = fetching_DocumentState;
d->statusCode = 0;
iUrl url;
init_Url(&url, d->url);
if (!cmpCStrSc_Rangecc(&url.protocol, "file", &iCaseInsensitive)) {
iFile *f = new_File(collect_String(newRange_String(url.path)));
if (open_File(f, readOnly_FileMode)) {
setBlock_String(d->newSource, collect_Block(readAll_File(f)));
refresh_Widget(constAs_Widget(d));
}
iRelease(f);
return;
}
d->request = new_TlsRequest();
uint16_t port = toInt_String(collect_String(newRange_String(url.port)));
if (port == 0) {
port = 1965; /* default Gemini port */
}
setUrl_TlsRequest(d->request, collect_String(newRange_String(url.host)), port);
/* The request string is an UTF-8 encoded absolute URL. */
iString *content = collectNew_String();
append_String(content, d->url);
appendCStr_String(content, "\r\n");
setContent_TlsRequest(d->request, utf8_String(content));
iConnect(TlsRequest, d->request, finished, d, requestFinished_DocumentWidget_);
submit_TlsRequest(d->request);
}
void setUrl_DocumentWidget(iDocumentWidget *d, const iString *url) {
iString *newUrl = new_String();
if (indexOfCStr_String(url, "://") == iInvalidPos && !startsWithCase_String(url, "gemini:")) {
/* Prepend default protocol. */
setCStr_String(newUrl, "gemini://");
}
append_String(newUrl, url);
if (cmpStringSc_String(d->url, newUrl, &iCaseInsensitive)) {
set_String(d->url, newUrl);
fetch_DocumentWidget_(d);
}
delete_String(newUrl);
}
static iRangei visibleRange_DocumentWidget_(const iDocumentWidget *d) {
const int margin = gap_UI * d->pageMargin;
return (iRangei){ d->scrollY - margin,
d->scrollY + height_Rect(bounds_Widget(constAs_Widget(d))) - margin };
}
static void addVisibleLink_DocumentWidget_(void *context, const iGmRun *run) {
iDocumentWidget *d = context;
if (run->linkId) {
pushBack_PtrArray(&d->visibleLinks, run);
}
}
static int scrollMax_DocumentWidget_(const iDocumentWidget *d) {
return size_GmDocument(d->doc).y - height_Rect(bounds_Widget(constAs_Widget(d))) +
2 * d->pageMargin * gap_UI;
}
static void updateVisible_DocumentWidget_(iDocumentWidget *d) {
const iRangei visRange = visibleRange_DocumentWidget_(d);
const iRect bounds = bounds_Widget(as_Widget(d));
setRange_ScrollWidget(d->scroll, (iRangei){ 0, scrollMax_DocumentWidget_(d) });
const int docSize = size_GmDocument(d->doc).y;
setThumb_ScrollWidget(d->scroll,
d->scrollY,
docSize > 0 ? height_Rect(bounds) * size_Range(&visRange) / docSize : 0);
clear_PtrArray(&d->visibleLinks);
render_GmDocument(d->doc, visRange, addVisibleLink_DocumentWidget_, d);
}
static void scroll_DocumentWidget_(iDocumentWidget *d, int offset) {
d->scrollY += offset;
if (d->scrollY < 0) {
d->scrollY = 0;
}
const int scrollMax = scrollMax_DocumentWidget_(d);
if (scrollMax > 0) {
d->scrollY = iMin(d->scrollY, scrollMax);
}
else {
d->scrollY = 0;
}
updateVisible_DocumentWidget_(d);
refresh_Widget(as_Widget(d));
}
static iRangecc dirPath_(iRangecc path) {
const size_t pos = lastIndexOfCStr_Rangecc(&path, "/");
if (pos == iInvalidPos) return path;
return (iRangecc){ path.start, path.start + pos };
}
static const iString *absoluteUrl_DocumentWidget_(const iDocumentWidget *d, const iString *url) {
if (indexOfCStr_String(url, "://") != iInvalidPos) {
/* Already absolute. */
return url;
}
iUrl parts;
init_Url(&parts, d->url);
iString *absolute = new_String();
appendRange_String(absolute, parts.protocol);
appendCStr_String(absolute, "://");
appendRange_String(absolute, parts.host);
if (!isEmpty_Range(&parts.port)) {
appendCStr_String(absolute, ":");
appendRange_String(absolute, parts.port);
}
if (startsWith_String(url, "/")) {
append_String(absolute, url);
}
else {
iRangecc relPath = range_String(url);
iRangecc dir = dirPath_(parts.path);
for (;;) {
if (equal_Rangecc(&relPath, ".")) {
relPath.start++;
}
else if (startsWith_Rangecc(&relPath, "./")) {
relPath.start += 2;
}
else if (equal_Rangecc(&relPath, "..")) {
relPath.start += 2;
dir = dirPath_(dir);
}
else if (startsWith_Rangecc(&relPath, "../")) {
relPath.start += 3;
dir = dirPath_(dir);
}
else break;
}
appendRange_String(absolute, dir);
if (!endsWith_String(absolute, "/")) {
appendCStr_String(absolute, "/");
}
appendRange_String(absolute, relPath);
}
return collect_String(absolute);
}
static iBool processEvent_DocumentWidget_(iDocumentWidget *d, const SDL_Event *ev) {
iWidget *w = as_Widget(d);
if (isResize_UserEvent(ev)) {
setWidth_GmDocument(d->doc, documentWidth_DocumentWidget_(d));
updateVisible_DocumentWidget_(d);
refresh_Widget(w);
}
else if (isCommand_Widget(w, ev, "scroll.moved")) {
d->scrollY = arg_Command(command_UserEvent(ev));
updateVisible_DocumentWidget_(d);
return iTrue;
}
else if (isCommand_Widget(w, ev, "scroll.page")) {
scroll_DocumentWidget_(
d, arg_Command(command_UserEvent(ev)) * height_Rect(documentBounds_DocumentWidget_(d)));
return iTrue;
}
if (ev->type == SDL_KEYDOWN) {
const int mods = keyMods_Sym(ev->key.keysym.mod);
const int key = ev->key.keysym.sym;
switch (key) {
case SDLK_HOME:
d->scrollY = 0;
updateVisible_DocumentWidget_(d);
refresh_Widget(w);
return iTrue;
case SDLK_END:
d->scrollY = scrollMax_DocumentWidget_(d);
updateVisible_DocumentWidget_(d);
refresh_Widget(w);
return iTrue;
case SDLK_PAGEUP:
case SDLK_PAGEDOWN:
case ' ':
postCommand_Widget(w, "scroll.page arg:%d", key == SDLK_PAGEUP ? -1 : +1);
return iTrue;
case 'r':
if (mods == KMOD_PRIMARY) {
fetch_DocumentWidget_(d);
return iTrue;
}
break;
case '0': {
extern int enableHalfPixelGlyphs_Text;
enableHalfPixelGlyphs_Text = !enableHalfPixelGlyphs_Text;
refresh_Widget(w);
printf("halfpixel: %d\n", enableHalfPixelGlyphs_Text);
fflush(stdout);
break;
}
}
}
else if (ev->type == SDL_MOUSEWHEEL) {
scroll_DocumentWidget_(d, -3 * ev->wheel.y * lineHeight_Text(default_FontId));
return iTrue;
}
else if (ev->type == SDL_MOUSEMOTION) {
const iGmRun *oldHoverLink = d->hoverLink;
d->hoverLink = NULL;
const iRect docBounds = documentBounds_DocumentWidget_(d);
const iInt2 hoverPos = addY_I2(
sub_I2(init_I2(ev->motion.x, ev->motion.y), topLeft_Rect(docBounds)), d->scrollY);
iConstForEach(PtrArray, i, &d->visibleLinks) {
const iGmRun *run = i.ptr;
if (contains_Rect(run->bounds, hoverPos)) {
d->hoverLink = run;
break;
}
}
if (d->hoverLink != oldHoverLink) {
refresh_Widget(w);
}
}
switch (processEvent_Click(&d->click, ev)) {
case finished_ClickResult:
if (d->hoverLink) {
iAssert(d->hoverLink->linkId);
postCommandf_App("open url:%s",
cstr_String(absoluteUrl_DocumentWidget_(
d, linkUrl_GmDocument(d->doc, d->hoverLink->linkId))));
}
return iTrue;
case started_ClickResult:
case double_ClickResult:
case drag_ClickResult:
case aborted_ClickResult:
return iTrue;
default:
break;
}
return processEvent_Widget(w, ev);
}
iDeclareType(DrawContext)
struct Impl_DrawContext {
const iDocumentWidget *widget;
iRect bounds;
iPaint paint;
};
static void drawRun_DrawContext_(void *context, const iGmRun *run) {
iDrawContext *d = context;
iString text;
/* TODO: making a copy is unnecessary; the text routines should accept Rangecc */
initRange_String(&text, run->text);
iInt2 origin = addY_I2(d->bounds.pos, -d->widget->scrollY);
drawString_Text(run->font, add_I2(run->bounds.pos, origin), run->color, &text);
if (run == d->widget->hoverLink) {
drawRect_Paint(&d->paint, moved_Rect(run->bounds, origin), orange_ColorId);
}
deinit_String(&text);
}
static void draw_DocumentWidget_(const iDocumentWidget *d) {
const iWidget *w = constAs_Widget(d);
const iRect bounds = bounds_Widget(w);
draw_Widget(w);
iDrawContext ctx = { .widget = d, .bounds = documentBounds_DocumentWidget_(d) };
init_Paint(&ctx.paint);
fillRect_Paint(&ctx.paint, bounds, gray25_ColorId);
/* Update the document? */
if (!isEmpty_String(d->newSource)) {
iDocumentWidget *m = iConstCast(iDocumentWidget *, d);
/* TODO: Do this in the background. However, that requires a text metrics calculator
that does not try to cache the glyph bitmaps. */
setSource_GmDocument(m->doc, m->newSource, width_Rect(ctx.bounds));
postCommandf_App("document.changed url:%s", cstr_String(d->url));
clear_String(m->newSource);
m->scrollY = 0;
m->state = ready_DocumentState;
updateVisible_DocumentWidget_(m);
}
if (d->state != ready_DocumentState) return;
setClip_Paint(&ctx.paint, bounds);
render_GmDocument(d->doc, visibleRange_DocumentWidget_(d), drawRun_DrawContext_, &ctx);
clearClip_Paint(&ctx.paint);
draw_Widget(w);
}
iBeginDefineSubclass(DocumentWidget, Widget)
.processEvent = (iAny *) processEvent_DocumentWidget_,
.draw = (iAny *) draw_DocumentWidget_,
iEndDefineSubclass(DocumentWidget)
|