236 行
6.7 KiB
C
実行ファイル
236 行
6.7 KiB
C
実行ファイル
#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <poppler/glib/poppler.h>
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#include <X11/keysym.h>
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#include <cairo/cairo.h>
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#include <cairo/cairo-xlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <stdbool.h>
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PopplerDocument *doc = NULL;
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int curpage = 0;
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int totpage = 0;
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//char sq[256] = {0}; // TODO: 検索
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void cairo_surface_clear(cairo_surface_t *surface) {
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cairo_t *cr = cairo_create(surface);
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cairo_set_source_rgba(cr, 0, 0, 0, 0);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_paint(cr);
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cairo_destroy(cr);
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}
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// TODO: 検索
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/*void search(PopplerDocument *doc, const char *keyword, cairo_t *cr) {
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int n_page = poppler_document_get_n_pages(doc);
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for (int i = 0; i < n_page; i++) {
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PopplerPage *page = poppler_document_get_page(doc, i);
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if (!page) continue;
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GList *matches = poppler_page_find_text(page, keyword);
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for (GList *l = matches; l; l = l->next) {
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PopplerRectangle *match = (PopplerRectangle *)l->data;
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cairo_set_source_rgba(cr, 1, 1, 0, 0.5);
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cairo_rectangle(cr, match->x1, match->y1, match->x2 - match->x1, match->y2 - match->y1);
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cairo_fill(cr);
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poppler_rectangle_free(match);
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}
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g_list_free(matches);
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g_object_unref(page);
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}
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}*/
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void open_pdf(const char* filename) {
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GError *error = NULL;
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char file_uri[512];
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snprintf(file_uri, sizeof(file_uri), "file://%s", filename);
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doc = poppler_document_new_from_file(file_uri, NULL, &error);
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if (doc == NULL) {
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printf("PDFファイルを読み込みに失敗しました： %s\n", error->message);
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return;
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}
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curpage = 0;
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totpage = poppler_document_get_n_pages(doc);
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PopplerPage *page = poppler_document_get_page(doc, curpage);
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if (page == NULL) {
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printf("ページを読み込みに失敗しました。\n");
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return;
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}
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double pag_w, pag_h;
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poppler_page_get_size(page, &pag_w, &pag_h);
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Display *d = XOpenDisplay(NULL);
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Window w = XCreateSimpleWindow(d, RootWindow(d, 0), 0, 0, pag_w, pag_h, 1, 0, 0);
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XSelectInput(d, w, ExposureMask | KeyPressMask | StructureNotifyMask);
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XMapWindow(d, w);
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cairo_surface_t *xlib_surface = cairo_xlib_surface_create(d, w, DefaultVisual(d, 0), pag_w, pag_h);
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cairo_t *xlib_cr = cairo_create(xlib_surface);
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double scale = 1.2;
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double xpos = 0.0;
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double ypos = 0.0;
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// TODO: 検索
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//bool isfind = false;
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//int sqlen = 0;
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while (1) {
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XEvent e;
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XNextEvent(d, &e);
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if (e.type == KeyPress) {
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XWindowAttributes attrs;
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XGetWindowAttributes(d, w, &attrs);
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KeySym keysym = XLookupKeysym(&e.xkey, 0);
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double pscale = scale;
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if (keysym == XK_q) {
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break;
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} else if (keysym == XK_plus || keysym == XK_semicolon) {
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scale += 0.1;
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if (scale > 5.0) scale = 5.0;
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xpos -= (pag_w * scale - pag_w * pscale) / 2.0;
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ypos -= (pag_h * scale - pag_h * pscale) / 2.0;
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} else if (keysym == XK_minus || keysym == XK_equal) {
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scale -= 0.1;
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if (scale < 0.1) scale = 0.1;
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xpos += (pag_w * pscale - pag_w * scale) / 2.0;
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ypos += (pag_h * pscale - pag_h * scale) / 2.0;
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} else if (keysym == XK_h) {
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xpos -= 10.0;
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if (xpos < 0) xpos = 0;
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} else if (keysym == XK_l) {
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xpos += 10.0;
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if (xpos > pag_w * scale - attrs.width) xpos = pag_w * scale - attrs.width;
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} else if (keysym == XK_k) {
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ypos -= 10.0;
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if (ypos < 0) ypos = 0;
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} else if (keysym == XK_j) {
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ypos += 10.0;
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if (ypos > pag_h * scale - attrs.height) ypos = pag_h * scale - attrs.height;
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} else if (keysym == XK_comma || keysym == XK_less) {
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if (curpage > 0) {
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curpage--;
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if (curpage < 0) curpage = 0;
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xpos = 0.0;
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ypos = 0.0;
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page = poppler_document_get_page(doc, curpage);
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}
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} else if (keysym == XK_period || keysym == XK_greater) {
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if (curpage < totpage - 1) {
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curpage++;
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if (curpage >= totpage) curpage = totpage - 1;
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xpos = 0.0;
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ypos = 0.0;
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page = poppler_document_get_page(doc, curpage);
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}
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// TODO: 検索
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/*} else if (keysym == XK_slash) {
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if (!isfind) {
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isfind = true;
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memset(sq, 0, sizeof(sq));
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sqlen = 0;
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}
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continue;
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} else if (keysym == XK_Escape) {
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if (isfind) {
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isfind = false;
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memset(sq, 0, sizeof(sq));
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sqlen = 0;
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continue;
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}*/
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}
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// TODO: 検索
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/*if (isfind) {
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char str[25];
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int len = XLookupString(&e.xkey, str, sizeof(str), NULL, NULL);
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if (len > 0 && sqlen + len < sizeof(sq) - 1) {
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strncpy(sq + sqlen, str, len);
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sqlen += len;
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sq[sqlen] = '\0';
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search(doc, sq, xlib_cr);
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} else if (keysym == XK_BackSpace && sqlen > 0) {
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sq[--sqlen] = '\0';
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search(doc, sq, xlib_cr);
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}
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continue;
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}*/
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XClearWindow(d, w);
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XExposeEvent ev = {0};
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ev.type = Expose;
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ev.window = w;
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XSendEvent(d, w, False, ExposureMask, (XEvent*)&ev);
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XFlush(d);
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}
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if (e.type == ConfigureNotify) {
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pag_w = e.xconfigure.width;
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pag_h = e.xconfigure.height;
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cairo_xlib_surface_set_size(xlib_surface, pag_w, pag_h);
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}
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if (e.type == Expose) {
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XWindowAttributes attrs;
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XGetWindowAttributes(d, w, &attrs);
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// 表示を削除
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cairo_identity_matrix(xlib_cr);
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cairo_set_source_rgb(xlib_cr, 1, 1, 1);
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cairo_paint(xlib_cr);
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// 表示を作成
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cairo_translate(xlib_cr, xpos, ypos);
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cairo_scale(xlib_cr, scale, scale);
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// TODO: ページ番号の表示
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/*cairo_identity_matrix(xlib_cr);
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char pinf[100];
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snprintf(pinf, sizeof(pinf), "%d/%dページ", curpage + 1, totpage);
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cairo_text_extents_t te;
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cairo_select_font_face(xlib_cr, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size(xlib_cr, 14);
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cairo_text_extents(xlib_cr, pinf, &te);
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cairo_move_to(xlib_cr, 10, 20);
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cairo_set_source_rgb(xlib_cr, 0, 0, 0);
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cairo_show_text(xlib_cr, pinf);*/
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cairo_status_t status = cairo_status(xlib_cr);
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if (status != CAIRO_STATUS_SUCCESS) {
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fprintf(stderr, "Cairoエラー： %s\n", cairo_status_to_string(status));
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}
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// TODO: 検索
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//search(doc, sq, xlib_cr);
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poppler_page_render(page, xlib_cr);
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cairo_surface_flush(xlib_surface);
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}
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}
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cairo_destroy(xlib_cr);
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cairo_surface_destroy(xlib_surface);
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g_object_unref(page);
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g_object_unref(doc);
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XCloseDisplay(d);
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}
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int main(int argc, char **argv) {
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if (argc < 2) {
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g_print("使用方法： %s <PDFファイル>\n", argv[0]);
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return 1;
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}
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open_pdf(argv[1]);
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return 0;
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}
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