Aren/kolibrios
1
0
Fork 0
mirror of https://github.com/KolibriOS/kolibrios.git synced 2024-12-15 19:33:59 +03:00
Code Issues Packages Projects Releases Wiki Activity
11e4e636d1
kolibrios/contrib/media/updf/apps/pdfapp.c
maxcodehack 2f20ba26d3 uPDF: 
- fix 'color rotate' bug (http://board.kolibrios.org/viewtopic.php?f=38&t=1958&start=30#p42004)
- fix bigger page artefact under smaller page

git-svn-id: svn://kolibrios.org@8461 a494cfbc-eb01-0410-851d-a64ba20cac60
2020-12-20 16:47:32 +00:00

1180 lines
22 KiB
C
Raw Blame History

#include "fitz.h"
#include "mupdf.h"
#include "pdfapp.h"
#include "kolibri.h"
#include <ctype.h> /* for tolower() */
#define ZOOMSTEP 1.142857
#define BEYOND_THRESHHOLD 40
enum panning
{
DONT_PAN = 0,
PAN_TO_TOP,
PAN_TO_BOTTOM
};
void DrawPageSides(void);
static void pdfapp_showpage(pdfapp_t *app, int loadpage, int drawpage, int repaint);
static void pdfapp_warn(pdfapp_t *app, const char *fmt, ...)
{
char buf[1024];
va_list ap;
va_start(ap, fmt);
vsprintf(buf, fmt, ap);
va_end(ap);
winwarn(app, buf);
}
static void pdfapp_error(pdfapp_t *app, fz_error error)
{
winerror(app, error);
}
char *pdfapp_version(pdfapp_t *app)
{
return
"MuPDF 0.9\n"
"Copyright 2006-2011 Artifex Sofware, Inc.\n";
}
char *pdfapp_usage(pdfapp_t *app)
{
return " ";
/*
"L\t\t-- rotate left\n"
"R\t\t-- rotate right\n"
"h\t\t-- scroll left\n"
"j down\t\t-- scroll down\n"
"k up\t\t-- scroll up\n"
"l\t\t-- scroll right\n"
"+\t\t-- zoom in\n"
"-\t\t-- zoom out\n"
"w\t\t-- shrinkwrap\n"
"r\t\t-- reload file\n"
". pgdn right space\t-- next page\n"
", pgup left b\t-- previous page\n"
">\t\t-- next 10 pages\n"
"<\t\t-- back 10 pages\n"
"m\t\t-- mark page for snap back\n"
"t\t\t-- pop back to latest mark\n"
"1m\t\t-- mark page in register 1\n"
"1t\t\t-- go to page in register 1\n"
"123g\t\t-- go to page 123\n"
"/\t\t-- search for text\n"
"n\t\t-- find next search result\n"
"N\t\t-- find previous search result\n"
"c\t\t-- toggle between color and grayscale\n"
;
*/
}
void pdfapp_init(pdfapp_t *app)
{
memset(app, 0, sizeof(pdfapp_t));
app->scrw = 640;
app->scrh = 480;
app->resolution = 72;
}
void pdfapp_invert(pdfapp_t *app, fz_bbox rect)
{
unsigned char *p;
int x, y, n;
int x0 = CLAMP(rect.x0 - app->image->x, 0, app->image->w - 1);
int x1 = CLAMP(rect.x1 - app->image->x, 0, app->image->w - 1);
int y0 = CLAMP(rect.y0 - app->image->y, 0, app->image->h - 1);
int y1 = CLAMP(rect.y1 - app->image->y, 0, app->image->h - 1);
for (y = y0; y < y1; y++)
{
p = app->image->samples + (y * app->image->w + x0) * app->image->n;
for (x = x0; x < x1; x++)
{
for (n = app->image->n; n > 0; n--, p++)
*p = 255 - *p;
}
}
}
static void pdfapp_open_pdf(pdfapp_t *app, char *filename, int fd)
{
fz_error error;
fz_stream *file;
char *password = "";
fz_obj *obj;
fz_obj *info;
/*
* Open PDF and load xref table
*/
kol_board_puts("FZ OPEN\n");
//file = fz_open_fd(fd);
kol_board_puts("FZ ready\n");
error = pdf_open_xref(&app->xref, filename, NULL);
if (error){
kol_board_puts("FZ can't open\n");
pdfapp_error(app, fz_rethrow(error, "cannot open document '%s'", filename));}
fz_close(file);
/*
* Handle encrypted PDF files
*/
/*
if (pdf_needs_password(app->xref))
{
int okay = pdf_authenticate_password(app->xref, password);
while (!okay)
{
password = winpassword(app, filename);
if (!password)
exit(1);
okay = pdf_authenticate_password(app->xref, password);
if (!okay)
pdfapp_warn(app, "Invalid password.");
}
}
* */
/*
* Load meta information
*/
/*
app->outline = pdf_load_outline(app->xref);
app->doctitle = filename;
if (strrchr(app->doctitle, '\\'))
app->doctitle = strrchr(app->doctitle, '\\') + 1;
if (strrchr(app->doctitle, '/'))
app->doctitle = strrchr(app->doctitle, '/') + 1;
info = fz_dict_gets(app->xref->trailer, "Info");
if (info)
{
obj = fz_dict_gets(info, "Title");
if (obj)
app->doctitle = pdf_to_utf8(obj);
} */
/*
* Start at first page
*/
kol_board_puts("Start at first page\n");
error = pdf_load_page_tree(app->xref);
if (error) {
kol_board_puts("Can't load tree\n");
pdfapp_error(app, fz_rethrow(error, "cannot load page tree"));}
kol_board_puts("Page counter\n");
app->pagecount = pdf_count_pages(app->xref);
kol_board_puts("All is set!\n");
}
void pdfapp_open(pdfapp_t *app, char *filename, int fd, int reload)
{
pdfapp_open_pdf(app, filename, fd);
app->cache = fz_new_glyph_cache();
if (app->pageno < 1)
app->pageno = 1;
if (app->pageno > app->pagecount)
app->pageno = app->pagecount;
if (app->resolution < MINRES)
app->resolution = MINRES;
if (app->resolution > MAXRES)
app->resolution = MAXRES;
if (!reload)
{
app->shrinkwrap = 1;
app->rotate = 0;
app->panx = 0;
app->pany = 0;
}
pdfapp_showpage(app, 1, 1, 1);
}
void pdfapp_close(pdfapp_t *app)
{
if (app->cache)
fz_free_glyph_cache(app->cache);
app->cache = NULL;
if (app->image)
fz_drop_pixmap(app->image);
app->image = NULL;
if (app->outline)
pdf_free_outline(app->outline);
app->outline = NULL;
if (app->xref)
{
if (app->xref->store)
pdf_free_store(app->xref->store);
app->xref->store = NULL;
pdf_free_xref(app->xref);
app->xref = NULL;
}
fz_flush_warnings();
}
static fz_matrix pdfapp_viewctm(pdfapp_t *app)
{
fz_matrix ctm;
ctm = fz_identity;
ctm = fz_concat(ctm, fz_translate(0, -app->page_bbox.y1));
if (app->xref)
ctm = fz_concat(ctm, fz_scale(app->resolution/72.0f, -app->resolution/72.0f));
else
ctm = fz_concat(ctm, fz_scale(app->resolution/96.0f, app->resolution/96.0f));
ctm = fz_concat(ctm, fz_rotate(app->rotate + app->page_rotate));
return ctm;
}
static void pdfapp_panview(pdfapp_t *app, int newx, int newy)
{
if (newx < 0)
newx = 0;
if (newy < 0)
newy = 0;
if (newx + app->image->w < app->winw)
newx = app->winw - app->image->w;
if (newy + app->image->h < app->winh)
newy = app->winh - app->image->h;
if (app->winw >= app->image->w)
newx = (app->winw - app->image->w) / 2;
if (app->winh >= app->image->h)
newy = (app->winh - app->image->h) / 2;
if (newx != app->panx || newy != app->pany)
winrepaint(app);
if (newy > app->image->h) {
app->pageno++;
if (app->pageno > app->pagecount)
app->pageno = app->pagecount;
newy = 0;
app->pany = newy;
pdfapp_showpage(app, 1, 1, 1);
}
app->panx = newx;
app->pany = newy;
}
static void pdfapp_loadpage_pdf(pdfapp_t *app)
{
pdf_page *page;
fz_error error;
fz_device *mdev;
error = pdf_load_page(&page, app->xref, app->pageno - 1);
if (error)
pdfapp_error(app, error);
app->page_bbox = page->mediabox;
app->page_rotate = page->rotate;
app->page_links = page->links;
page->links = NULL;
/* Create display list */
app->page_list = fz_new_display_list();
mdev = fz_new_list_device(app->page_list);
error = pdf_run_page(app->xref, page, mdev, fz_identity);
if (error)
{
error = fz_rethrow(error, "cannot draw page %d in '%s'", app->pageno, app->doctitle);
pdfapp_error(app, error);
}
fz_free_device(mdev);
pdf_free_page(page);
pdf_age_store(app->xref->store, 3);
}
static void pdfapp_showpage(pdfapp_t *app, int loadpage, int drawpage, int repaint)
{
char buf[256];
fz_device *idev;
fz_device *tdev;
fz_colorspace *colorspace;
fz_matrix ctm;
fz_bbox bbox;
wincursor(app, WAIT);
if (loadpage)
{
if (app->page_list)
fz_free_display_list(app->page_list);
if (app->page_text)
fz_free_text_span(app->page_text);
if (app->page_links)
pdf_free_link(app->page_links);
if (app->xref)
pdfapp_loadpage_pdf(app);
/* Zero search hit position */
app->hit = -1;
app->hitlen = 0;
/* Extract text */
app->page_text = fz_new_text_span();
tdev = fz_new_text_device(app->page_text);
fz_execute_display_list(app->page_list, tdev, fz_identity, fz_infinite_bbox);
fz_free_device(tdev);
}
if (drawpage)
{
sprintf(buf, "%s - %d/%d (%d dpi)", app->doctitle,
app->pageno, app->pagecount, app->resolution);
/// wintitle(app, buf);
ctm = pdfapp_viewctm(app);
bbox = fz_round_rect(fz_transform_rect(ctm, app->page_bbox));
/* Draw */
if (app->image)
fz_drop_pixmap(app->image);
if (app->grayscale)
colorspace = fz_device_gray;
else
/*
#ifdef _WIN32
colorspace = fz_device_bgr;
#else
colorspace = fz_device_rgb;
#endif
*/
colorspace = fz_device_bgr;
app->image = fz_new_pixmap_with_rect(colorspace, bbox);
fz_clear_pixmap_with_color(app->image, 255);
idev = fz_new_draw_device(app->cache, app->image);
fz_execute_display_list(app->page_list, idev, ctm, bbox);
fz_free_device(idev);
}
if (repaint)
{
pdfapp_panview(app, app->panx, app->pany);
if (app->shrinkwrap)
{
kol_board_puts ("SHRINK\n");
int w = app->image->w;
int h = app->image->h;
if (app->winw == w)
app->panx = 0;
if (app->winh == h)
app->pany = 0;
if (w > app->scrw * 90 / 100)
w = app->scrw * 90 / 100;
if (h > app->scrh * 90 / 100)
h = app->scrh * 90 / 100;
if (w != app->winw || h != app->winh)
winresize(app, w, h);
}
winrepaint(app);
wincursor(app, ARROW);
}
fz_flush_warnings();
DrawPageSides();
}
static void pdfapp_gotouri(pdfapp_t *app, fz_obj *uri)
{
char *buf;
buf = fz_malloc(fz_to_str_len(uri) + 1);
memcpy(buf, fz_to_str_buf(uri), fz_to_str_len(uri));
buf[fz_to_str_len(uri)] = 0;
winopenuri(app, buf);
fz_free(buf);
}
static void pdfapp_gotopage(pdfapp_t *app, fz_obj *obj)
{
int number;
number = pdf_find_page_number(app->xref, obj);
if (number < 0)
return;
if (app->histlen + 1 == 256)
{
memmove(app->hist, app->hist + 1, sizeof(int) * 255);
app->histlen --;
}
app->hist[app->histlen++] = app->pageno;
app->pageno = number + 1;
pdfapp_showpage(app, 1, 1, 1);
}
static inline fz_bbox bboxcharat(fz_text_span *span, int idx)
{
int ofs = 0;
while (span)
{
if (idx < ofs + span->len)
return span->text[idx - ofs].bbox;
if (span->eol)
{
if (idx == ofs + span->len)
return fz_empty_bbox;
ofs ++;
}
ofs += span->len;
span = span->next;
}
return fz_empty_bbox;
}
void pdfapp_inverthit(pdfapp_t *app)
{
fz_bbox hitbox, bbox;
fz_matrix ctm;
int i;
if (app->hit < 0)
return;
hitbox = fz_empty_bbox;
ctm = pdfapp_viewctm(app);
for (i = app->hit; i < app->hit + app->hitlen; i++)
{
bbox = bboxcharat(app->page_text, i);
if (fz_is_empty_rect(bbox))
{
if (!fz_is_empty_rect(hitbox))
pdfapp_invert(app, fz_transform_bbox(ctm, hitbox));
hitbox = fz_empty_bbox;
}
else
{
hitbox = fz_union_bbox(hitbox, bbox);
}
}
if (!fz_is_empty_rect(hitbox))
pdfapp_invert(app, fz_transform_bbox(ctm, hitbox));
}
static inline int charat(fz_text_span *span, int idx)
{
int ofs = 0;
while (span)
{
if (idx < ofs + span->len)
return span->text[idx - ofs].c;
if (span->eol)
{
if (idx == ofs + span->len)
return ' ';
ofs ++;
}
ofs += span->len;
span = span->next;
}
return 0;
}
static int textlen(fz_text_span *span)
{
int len = 0;
while (span)
{
len += span->len;
if (span->eol)
len ++;
span = span->next;
}
return len;
}
static int match(char *s, fz_text_span *span, int n)
{
int orig = n;
int c;
while ((c = *s++))
{
if (c == ' ' && charat(span, n) == ' ')
{
while (charat(span, n) == ' ')
n++;
}
else
{
if (tolower(c) != tolower(charat(span, n)))
return 0;
n++;
}
}
return n - orig;
}
static void pdfapp_searchforward(pdfapp_t *app, enum panning *panto)
{
int matchlen;
int test;
int len;
int startpage;
wincursor(app, WAIT);
startpage = app->pageno;
do
{
len = textlen(app->page_text);
if (app->hit >= 0)
test = app->hit + strlen(app->search);
else
test = 0;
while (test < len)
{
matchlen = match(app->search, app->page_text, test);
if (matchlen)
{
app->hit = test;
app->hitlen = matchlen;
wincursor(app, HAND);
winrepaint(app);
return;
}
test++;
}
app->pageno++;
if (app->pageno > app->pagecount)
app->pageno = 1;
pdfapp_showpage(app, 1, 0, 0);
*panto = PAN_TO_TOP;
} while (app->pageno != startpage);
if (app->pageno == startpage)
{
pdfapp_warn(app, "String '%s' not found.", app->search);
winrepaintsearch(app);
}
else
winrepaint(app);
wincursor(app, HAND);
}
static void pdfapp_searchbackward(pdfapp_t *app, enum panning *panto)
{
int matchlen;
int test;
int len;
int startpage;
wincursor(app, WAIT);
startpage = app->pageno;
do
{
len = textlen(app->page_text);
if (app->hit >= 0)
test = app->hit - 1;
else
test = len;
while (test >= 0)
{
matchlen = match(app->search, app->page_text, test);
if (matchlen)
{
app->hit = test;
app->hitlen = matchlen;
wincursor(app, HAND);
winrepaint(app);
return;
}
test--;
}
app->pageno--;
if (app->pageno < 1)
app->pageno = app->pagecount;
pdfapp_showpage(app, 1, 0, 0);
*panto = PAN_TO_BOTTOM;
} while (app->pageno != startpage);
if (app->pageno == startpage)
{
pdfapp_warn(app, "String '%s' not found.", app->search);
winrepaintsearch(app);
}
else
winrepaint(app);
wincursor(app, HAND);
}
void pdfapp_onresize(pdfapp_t *app, int w, int h)
{
if (app->winw != w || app->winh != h)
{
app->winw = w;
app->winh = h;
pdfapp_panview(app, app->panx, app->pany);
winrepaint(app);
}
}
void pdfapp_onkey(pdfapp_t *app, int c)
{
int oldpage = app->pageno;
enum panning panto = PAN_TO_TOP;
int loadpage = 1;
if (app->isediting)
{
int n = strlen(app->search);
if (c < ' ')
{
if (c == '\b' && n > 0)
{
app->search[n - 1] = 0;
winrepaintsearch(app);
}
if (c == '\n' || c == '\r')
{
app->isediting = 0;
if (n > 0)
{
winrepaintsearch(app);
pdfapp_onkey(app, 'n');
}
else
winrepaint(app);
}
if (c == '\033')
{
app->isediting = 0;
winrepaint(app);
}
}
else
{
if (n + 2 < sizeof app->search)
{
app->search[n] = c;
app->search[n + 1] = 0;
winrepaintsearch(app);
}
}
return;
}
/*
* Save numbers typed for later
*/
if (c >= '0' && c <= '9')
{
app->number[app->numberlen++] = c;
app->number[app->numberlen] = '\0';
}
switch (c)
{
case '?':
winhelp(app);
break;
case 'q':
winclose(app);
break;
/*
* Zoom and rotate
*/
case '+':
case '=':
app->resolution *= ZOOMSTEP;
if (app->resolution > MAXRES)
app->resolution = MAXRES;
pdfapp_showpage(app, 0, 1, 1);
break;
case '-':
app->resolution /= ZOOMSTEP;
if (app->resolution < MINRES)
app->resolution = MINRES;
pdfapp_showpage(app, 0, 1, 1);
break;
case 'L':
app->rotate -= 90;
pdfapp_showpage(app, 0, 1, 1);
break;
case 'R':
app->rotate += 90;
pdfapp_showpage(app, 0, 1, 1);
break;
case 'c':
app->grayscale ^= 1;
pdfapp_showpage(app, 0, 1, 1);
break;
#ifndef NDEBUG
case 'a':
app->rotate -= 15;
pdfapp_showpage(app, 0, 1, 1);
break;
case 's':
app->rotate += 15;
pdfapp_showpage(app, 0, 1, 1);
break;
#endif
/*
* Pan view, but dont need to repaint image
*/
case 'w':
app->shrinkwrap = 1;
app->panx = app->pany = 0;
pdfapp_showpage(app, 0, 0, 1);
break;
case 'h':
app->panx += app->image->w / 10;
pdfapp_showpage(app, 0, 0, 1);
break;
case 'j':
app->pany -= app->image->h / 10;
pdfapp_showpage(app, 0, 0, 1);
break;
case 'k':
app->pany += app->image->h / 10;
pdfapp_showpage(app, 0, 0, 1);
break;
case 'l':
app->panx -= app->image->w / 10;
pdfapp_showpage(app, 0, 0, 1);
break;
/*
* Page navigation
*/
case 'g':
case '\n':
case '\r':
if (app->numberlen > 0)
app->pageno = atoi(app->number);
else
app->pageno = 1;
break;
case 'G':
app->pageno = app->pagecount;
break;
case 'm':
if (app->numberlen > 0)
{
int idx = atoi(app->number);
if (idx >= 0 && idx < nelem(app->marks))
app->marks[idx] = app->pageno;
}
else
{
if (app->histlen + 1 == 256)
{
memmove(app->hist, app->hist + 1, sizeof(int) * 255);
app->histlen --;
}
app->hist[app->histlen++] = app->pageno;
}
break;
case 't':
if (app->numberlen > 0)
{
int idx = atoi(app->number);
if (idx >= 0 && idx < nelem(app->marks))
if (app->marks[idx] > 0)
app->pageno = app->marks[idx];
}
else if (app->histlen > 0)
app->pageno = app->hist[--app->histlen];
break;
/*
* Back and forth ...
*/
case ',':
panto = PAN_TO_BOTTOM;
if (app->numberlen > 0)
app->pageno -= atoi(app->number);
else
app->pageno--;
break;
case '.':
panto = PAN_TO_TOP;
if (app->numberlen > 0)
app->pageno += atoi(app->number);
else
app->pageno++;
break;
case 'b':
panto = DONT_PAN;
if (app->numberlen > 0)
app->pageno -= atoi(app->number);
else
app->pageno--;
break;
case ' ':
panto = DONT_PAN;
if (app->numberlen > 0)
app->pageno += atoi(app->number);
else
app->pageno++;
break;
case ']':
panto = PAN_TO_TOP;
app->pageno++;
break;
case '[':
panto = PAN_TO_TOP;
app->pageno--;
break;
case '<':
panto = PAN_TO_TOP;
app->pageno -= 10;
break;
case '>':
panto = PAN_TO_TOP;
app->pageno += 10;
break;
/*
* Reloading the file...
*/
case 'r':
panto = DONT_PAN;
oldpage = -1;
winreloadfile(app);
break;
/*
* Searching
*/
case '/':
app->isediting = 1;
app->search[0] = 0;
app->hit = -1;
app->hitlen = 0;
winrepaintsearch(app);
break;
case 'n':
pdfapp_searchforward(app, &panto);
loadpage = 0;
break;
case 'N':
pdfapp_searchbackward(app, &panto);
loadpage = 0;
break;
}
if (c < '0' || c > '9')
app->numberlen = 0;
if (app->pageno < 1)
app->pageno = 1;
if (app->pageno > app->pagecount)
app->pageno = app->pagecount;
if (app->pageno != oldpage)
{
switch (panto)
{
case PAN_TO_TOP:
app->pany = 0;
break;
case PAN_TO_BOTTOM:
app->pany = -2000;
break;
case DONT_PAN:
break;
}
pdfapp_showpage(app, loadpage, 1, 1);
}
}
void pdfapp_onmouse(pdfapp_t *app, int x, int y, int btn, int modifiers, int state)
{
pdf_link *link;
fz_matrix ctm;
fz_point p;
p.x = x - app->panx + app->image->x;
p.y = y - app->pany + app->image->y;
ctm = pdfapp_viewctm(app);
ctm = fz_invert_matrix(ctm);
p = fz_transform_point(ctm, p);
for (link = app->page_links; link; link = link->next)
{
if (p.x >= link->rect.x0 && p.x <= link->rect.x1)
if (p.y >= link->rect.y0 && p.y <= link->rect.y1)
break;
}
if (link)
{
wincursor(app, HAND);
if (btn == 1 && state == 1)
{
if (link->kind == PDF_LINK_URI)
pdfapp_gotouri(app, link->dest);
else if (link->kind == PDF_LINK_GOTO)
pdfapp_gotopage(app, fz_array_get(link->dest, 0)); /* [ pageobj ... ] */
return;
}
}
else
{
wincursor(app, ARROW);
}
if (state == 1)
{
if (btn == 1 && !app->iscopying)
{
app->ispanning = 1;
app->selx = x;
app->sely = y;
app->beyondy = 0;
}
if (btn == 3 && !app->ispanning)
{
app->iscopying = 1;
app->selx = x;
app->sely = y;
app->selr.x0 = x;
app->selr.x1 = x;
app->selr.y0 = y;
app->selr.y1 = y;
}
if (btn == 4 || btn == 5) /* scroll wheel */
{
int dir = btn == 4 ? 1 : -1;
app->ispanning = app->iscopying = 0;
if (modifiers & (1<<2))
{
/* zoom in/out if ctrl is pressed */
if (dir > 0)
app->resolution *= ZOOMSTEP;
else
app->resolution /= ZOOMSTEP;
if (app->resolution > MAXRES)
app->resolution = MAXRES;
if (app->resolution < MINRES)
app->resolution = MINRES;
pdfapp_showpage(app, 0, 1, 1);
}
else
{
/* scroll up/down, or left/right if
shift is pressed */
int isx = (modifiers & (1<<0));
int xstep = isx ? 20 * dir : 0;
int ystep = !isx ? 20 * dir : 0;
pdfapp_panview(app, app->panx + xstep, app->pany + ystep);
}
}
}
else if (state == -1)
{
if (app->iscopying)
{
app->iscopying = 0;
app->selr.x0 = MIN(app->selx, x) - app->panx + app->image->x;
app->selr.x1 = MAX(app->selx, x) - app->panx + app->image->x;
app->selr.y0 = MIN(app->sely, y) - app->pany + app->image->y;
app->selr.y1 = MAX(app->sely, y) - app->pany + app->image->y;
winrepaint(app);
if (app->selr.x0 < app->selr.x1 && app->selr.y0 < app->selr.y1)
windocopy(app);
}
if (app->ispanning)
app->ispanning = 0;
}
else if (app->ispanning)
{
int newx = app->panx + x - app->selx;
int newy = app->pany + y - app->sely;
/* Scrolling beyond limits implies flipping pages */
/* Are we requested to scroll beyond limits? */
if (newy + app->image->h < app->winh || newy > 0)
{
/* Yes. We can assume that deltay != 0 */
int deltay = y - app->sely;
/* Check whether the panning has occured in the
* direction that we are already crossing the
* limit it. If not, we can conclude that we
* have switched ends of the page and will thus
* start over counting.
*/
if( app->beyondy == 0 || (app->beyondy ^ deltay) >= 0 )
{
/* Updating how far we are beyond and
* flipping pages if beyond threshhold
*/
app->beyondy += deltay;
if (app->beyondy > BEYOND_THRESHHOLD)
{
if( app->pageno > 1 )
{
app->pageno--;
pdfapp_showpage(app, 1, 1, 1);
newy = -app->image->h;
}
app->beyondy = 0;
}
else if (app->beyondy < -BEYOND_THRESHHOLD)
{
if( app->pageno < app->pagecount )
{
app->pageno++;
pdfapp_showpage(app, 1, 1, 1);
newy = 0;
}
app->beyondy = 0;
}
}
else
app->beyondy = 0;
}
/* Although at this point we've already determined that
* or that no scrolling will be performed in
* y-direction, the x-direction has not yet been taken
* care off. Therefore
*/
pdfapp_panview(app, newx, newy);
app->selx = x;
app->sely = y;
}
else if (app->iscopying)
{
app->selr.x0 = MIN(app->selx, x) - app->panx + app->image->x;
app->selr.x1 = MAX(app->selx, x) - app->panx + app->image->x;
app->selr.y0 = MIN(app->sely, y) - app->pany + app->image->y;
app->selr.y1 = MAX(app->sely, y) - app->pany + app->image->y;
winrepaint(app);
}
}
void pdfapp_oncopy(pdfapp_t *app, unsigned short *ucsbuf, int ucslen)
{
fz_bbox hitbox;
fz_matrix ctm;
fz_text_span *span;
int c, i, p;
int seen;
int x0 = app->selr.x0;
int x1 = app->selr.x1;
int y0 = app->selr.y0;
int y1 = app->selr.y1;
ctm = pdfapp_viewctm(app);
p = 0;
for (span = app->page_text; span; span = span->next)
{
seen = 0;
for (i = 0; i < span->len; i++)
{
hitbox = fz_transform_bbox(ctm, span->text[i].bbox);
c = span->text[i].c;
if (c < 32)
c = '?';
if (hitbox.x1 >= x0 && hitbox.x0 <= x1 && hitbox.y1 >= y0 && hitbox.y0 <= y1)
{
if (p < ucslen - 1)
ucsbuf[p++] = c;
seen = 1;
}
}
if (seen && span->eol)
{
#ifdef _WIN32
if (p < ucslen - 1)
ucsbuf[p++] = '\r';
#endif
if (p < ucslen - 1)
ucsbuf[p++] = '\n';
}
}
ucsbuf[p] = 0;
}
Reference in New Issue View Git Blame Copy Permalink