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#include "documentwidget.h"
#include "paint.h"
#include "util.h"
#include "app.h"
#include "../gemini.h"
#include "../gmdocument.h"
#include <the_Foundation/file.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;
};
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)) {
capturedRange_RegExpMatch(&m, 1, &d->protocol);
capturedRange_RegExpMatch(&m, 2, &d->host);
capturedRange_RegExpMatch(&m, 3, &d->port);
if (!isEmpty_Range(&d->port)) {
/* Don't include the colon. */
d->port.start++;
}
capturedRange_RegExpMatch(&m, 4, &d->path);
capturedRange_RegExpMatch(&m, 5, &d->query);
}
else {
iZap(*d);
}
iRelease(pattern);
}
iDefineObjectConstruction(DocumentWidget)
void init_DocumentWidget(iDocumentWidget *d) {
iWidget *w = as_Widget(d);
init_Widget(w);
setBackgroundColor_Widget(w, gray25_ColorId);
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;
setUrl_DocumentWidget(d, collectNewCStr_String("file:///home/jaakko/test.gmi"));
}
void deinit_DocumentWidget(iDocumentWidget *d) {
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 bounds.size.x - gap_UI * d->pageMargin * 2;
}
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;
}
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 */
delete_String(line);
}
setCStrN_String(d->newSource, responseRange.start, size_Range(&responseRange));
delete_Block(response);
iReleaseLater(d->request);
d->request = NULL;
fflush(stdout);
postRefresh_App();
}
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)));
postRefresh_App();
}
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) {
clear_String(d->url);
if (indexOfCStr_String(url, "://") == iInvalidPos && !startsWithCase_String(url, "gemini:")) {
/* Prepend default protocol. */
setCStr_String(d->url, "gemini://");
}
append_String(d->url, url);
fetch_DocumentWidget_(d);
}
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));
}
if (ev->type == SDL_KEYDOWN) {
const int mods = keyMods_Sym(ev->key.keysym.mod);
const int key = ev->key.keysym.sym;
if (mods == KMOD_PRIMARY && key == 'r') {
fetch_DocumentWidget_(d);
return iTrue;
}
}
else if (ev->type == SDL_MOUSEWHEEL) {
d->scrollY -= 3 * ev->wheel.y * lineHeight_Text(default_FontId);
if (d->scrollY < 0) d->scrollY = 0;
const int scrollMax =
size_GmDocument(d->doc).y - height_Rect(bounds_Widget(w)) + d->pageMargin * gap_UI;
if (scrollMax > 0) {
d->scrollY = iMin(d->scrollY, scrollMax);
}
postRefresh_App();
return iTrue;
}
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);
drawRect_Paint(&d->paint, moved_Rect(run->bounds, origin), red_ColorId);
deinit_String(&text);
}
static void draw_DocumentWidget_(const iDocumentWidget *d) {
const iWidget *w = constAs_Widget(d);
draw_Widget(w);
/* Update the document? */
if (!isEmpty_String(d->newSource)) {
/* TODO: Do this in the background. However, that requires a text metrics calculator
that does not try to cache the glyph bitmaps. */
setSource_GmDocument(d->doc, d->newSource, documentWidth_DocumentWidget_(d));
clear_String(d->newSource);
iConstCast(iDocumentWidget *, d)->state = ready_DocumentState;
}
if (d->state != ready_DocumentState) return;
iDrawContext ctx = {.widget = d, .bounds = bounds_Widget(w) };
const int margin = gap_UI * d->pageMargin;
shrink_Rect(&ctx.bounds, init1_I2(margin));
init_Paint(&ctx.paint);
drawRect_Paint(&ctx.paint, ctx.bounds, teal_ColorId);
render_GmDocument(
d->doc,
(iRangei){ d->scrollY - margin, d->scrollY + height_Rect(ctx.bounds) + margin },
drawRun_DrawContext_,
&ctx);
}
iBeginDefineSubclass(DocumentWidget, Widget)
.processEvent = (iAny *) processEvent_DocumentWidget_,
.draw = (iAny *) draw_DocumentWidget_,
iEndDefineSubclass(DocumentWidget)
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