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snownews/dialog.c

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// This file is part of Snownews - A lightweight console RSS newsreader
//
// Copyright (c) 2003-2004 Oliver Feiler <kiza@kcore.de>
// Copyright (c) 2021 Mike Sharov <msharov@users.sourceforge.net>
//
// Snownews is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 3
// as published by the Free Software Foundation.
//
// Snownews is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Snownews. If not, see http://www.gnu.org/licenses/.
#include "dialog.h"
#include "main.h"
#include "cat.h"
#include "conv.h"
#include "filters.h"
#include "feedio.h"
#include "uiutil.h"
#include "parse.h"
#include <ncurses.h>
char* UIOneLineEntryField (int x, int y)
{
char* text = malloc (512);
// UIStatus switches off attron!
attron (WA_REVERSE);
echo();
curs_set (1);
move (y, x);
// Beware of hardcoded textlength size!
// getnstr size does NOT include \0. This is really stupid and causes
// 1-byte overflows. Always size=len-1!
getnstr (text, 511);
noecho();
if (!_settings.cursor_always_visible)
curs_set (0);
attroff (WA_REVERSE);
// This memory needs to be freed in the calling function!
return text;
}
void UIChangeBrowser (void)
{
// malloc = 17 (strlen("Current setting: ") + browser
// We will malloc a bigger junk, because other languages
// might need longer strings and crash!
size_t cbrsl = strlen (_("Current setting: %s")) + strlen (_settings.browser) + 1;
char curbrowserstr[cbrsl];
snprintf (curbrowserstr, cbrsl, _("Current setting: %s"), _settings.browser);
repeat:
// Clear screen area we want to "draw" to.
attron (WA_REVERSE);
UISupportDrawBox (3, 5, COLS - 4, 7);
UIStatus (curbrowserstr, 0, 0);
char* browserstring = UIOneLineEntryField (5, 6);
if (strlen (browserstring) == 0) {
free (browserstring);
UIStatus (_("Aborted."), 1, 0);
return;
}
const char* fmtstr = strstr (browserstring, "%");
if (fmtstr && fmtstr[1] != 's') {
free (browserstring);
UIStatus (_("Only %s format strings allowed for default browser!"), 3, 1);
goto repeat;
}
if (strstr (browserstring, "'") != NULL)
UIStatus (_("Unsafe browser string (contains quotes)! See snownews.kcore.de/faq#toc2.4"), 3, 1);
free (_settings.browser);
_settings.browser = browserstring;
}
// Dialog to change feedname.
// Return: 0 on success
// 1 on user abort
// 2 original title restored
void UIChangeFeedName (struct feed* cur_ptr)
{
// Clear screen area we want to "draw" to.
attron (WA_REVERSE);
UISupportDrawBox (3, 5, COLS - 4, 7);
UIStatus (_("Enter new name. Blank line to abort. '-' to reset."), 0, 0);
char* newname = UIOneLineEntryField (5, 6);
// If strlen is zero, return 1.
if (strlen (newname) == 0) {
free (newname);
return;
}
// If newname contains "|", abort since this is used as a delimiter for the config file.
if (strstr (newname, "|") != NULL) {
free (newname);
UIStatus (_("The new title must not contain a \"|\" character!"), 2, 0);
return;
}
// Restore original title.
if (newname && cur_ptr->custom_title) {
if (strcmp (newname, "-") == 0) {
if (cur_ptr->title != NULL)
free (cur_ptr->title);
cur_ptr->title = cur_ptr->original;
// Set back original to NULL pointer.
cur_ptr->original = NULL;
free (cur_ptr->custom_title);
cur_ptr->custom_title = NULL;
free (newname);
return;
}
}
// Copy new name into ->custom_title.
free (cur_ptr->custom_title);
cur_ptr->custom_title = strdup (newname);
// Save original.
free (cur_ptr->original);
cur_ptr->original = cur_ptr->title;
// Set new title.
cur_ptr->title = newname;
return;
}
// Popup window to add new RSS feed. Passing an URL will
// automatically add it, no questions asked.
int UIAddFeed (char* newurl)
{
char* url;
if (newurl == NULL) {
// Clear screen area we want to "draw" to.
attron (WA_REVERSE);
UISupportDrawBox (3, 5, COLS - 4, 7);
UIStatus (_("Enter URL of the feed you want to add. Blank line to abort."), 0, 0);
url = UIOneLineEntryField (5, 6);
// If read stringlength is ZARO (abort of action requested) return 1
// and confuse the calling function.
if (strlen (url) == 0) {
free (url);
return 1;
}
CleanupString (url, 0);
// Support that stupid feed:// "protocol"
if (strncasecmp (url, "feed://", 7) == 0)
memcpy (url, "http", 4);
// If URL does not start with the procotol specification, assume http://
if (strncasecmp (url, "http://", 7) != 0 && strncasecmp (url, "https://", 8) != 0 && strncasecmp (url, "exec:", 5) != 0) {
char* httpurl = malloc (strlen ("http://") + strlen (url) + 1);
sprintf (httpurl, "http://%s", url);
free (url);
url = httpurl;
}
} else
url = strdup (newurl);
struct feed* new_ptr = newFeedStruct();
// getnstr does not return newline... says the docs.
new_ptr->feedurl = malloc (strlen (url) + 1);
// Attach to feed pointer chain.
strncpy (new_ptr->feedurl, url, strlen (url) + 1);
new_ptr->next = _feed_list;
if (_feed_list != NULL)
_feed_list->prev = new_ptr;
new_ptr->prev = NULL;
_feed_list = new_ptr;
// Tag execurl.
if (strncasecmp (url, "exec:", 5) == 0)
new_ptr->execurl = 1;
if (strncasecmp (url, "smartfeed:", 10) == 0)
new_ptr->smartfeed = 1;
// Don't need url text anymore.
free (url);
// Download new feed and DeXMLize it. */
if (UpdateFeed (new_ptr) != 0) {
UIStatus (_("The feed could not be parsed. Do you need a filter script for this feed? (y/n)"), 0, 0);
if (getch() == 'n')
return -1;
else {
UIPerFeedFilter (new_ptr);
FilterPipeNG (new_ptr);
if (DeXML (new_ptr) != 0)
return -1;
else
new_ptr->problem = false;
}
}
new_ptr->mtime = time (NULL);
return 0;
}
void FeedInfo (const struct feed* current_feed)
{
char* url = strdup (current_feed->feedurl); // feedurl - authinfo.
// Remove authinfo from URL.
const char* pauthinfo = strstr (url, "@");
if (pauthinfo)
memmove (strstr (url, "://") + 3, pauthinfo + 1, strlen (pauthinfo));
UISupportDrawBox (5, 4, COLS - 6, 13);
unsigned centerx = COLS / 2u;
attron (WA_REVERSE);
mvaddstr (5, centerx - ((strlen (current_feed->title)) / 2), current_feed->title);
mvaddnstr (7, centerx - (COLS / 2 - 7), url, COLS - 14);
move (8, centerx - (COLS / 2 - 7));
if (current_feed->lastmodified) {
char timebuf [32] = "";
ctime_r (&current_feed->lastmodified, timebuf);
for (unsigned i = 0; i < sizeof(timebuf); ++i)
if (timebuf[i] == '\n')
timebuf[i] = 0;
timebuf[sizeof(timebuf)-1] = 0;
printw (_("Last updated: %s"), timebuf);
} else
addstr (_("No modification date."));
free (url);
url = NULL;
char cachefile[PATH_MAX];
char* hashme = Hashify (current_feed->feedurl);
snprintf (cachefile, sizeof (cachefile), SNOWNEWS_CACHE_DIR "%s", getenv ("HOME"), hashme);
free (hashme);
struct stat cachestat;
move (9, centerx - (COLS / 2 - 7));
if (stat (cachefile, &cachestat) < 0)
addstr (_("Not in disk cache."));
else
printw (_("In disk cache: %jd bytes"), cachestat.st_size);
// Print category info
mvaddstr (10, centerx - (COLS / 2 - 7), _("Categories:"));
addstr (" ");
if (current_feed->feedcategories == NULL)
addstr (_("none"));
else {
char* categories = GetCategoryList (current_feed);
printw (categories);
free (categories);
}
// Tell user if feed uses auth, but don't display the string.
move (11, centerx - (COLS / 2 - 7));
if (current_feed->lasterror) {
addstr (_("Download failed: "));
addstr (current_feed->lasterror);
} else if (pauthinfo)
addstr (_("Feed uses authentication."));
else
addstr (_("Feed does not use authentication."));
// Display filter script if any.
if (current_feed->perfeedfilter != NULL) {
UISupportDrawBox (5, 13, COLS - 6, 14);
attron (WA_REVERSE);
mvaddstr (13, 7, _("Filtered through:"));
mvaddnstr (13, 7 + strlen (_("Filtered through:")) + 1, current_feed->perfeedfilter, COLS - 14 - strlen (_("Filtered through:")));
}
UIStatus (_("Displaying feed information."), 0, 0);
// Wait for the any key.
getch();
}
bool UIDeleteFeed (const char* feedname)
{
UISupportDrawBox (3, 5, COLS - 3, 8);
attron (WA_REVERSE);
mvaddstr (6, COLS / 2 - 21, _("Are you sure you want to delete this feed?"));
mvprintw (7, 5, "%s", feedname);
UIStatus (_("Type 'y' to delete, any other key to abort."), 0, 0);
return getch() == 'y';
}
void UIHelpScreen (void)
{
unsigned centerx = COLS / 2u, centery = LINES / 2u;
UISupportDrawBox (centerx - 20, centery - 10, centerx + 24, centery + 9);
attron (WA_REVERSE);
// Keys
const int offset = 18, offsetstr = 12;
mvprintw (centery - 9, centerx - offset, "%c:", _settings.keybindings.addfeed);
mvprintw (centery - 8, centerx - offset, "%c:", _settings.keybindings.deletefeed);
mvprintw (centery - 7, centerx - offset, "%c:", _settings.keybindings.changefeedname);
mvprintw (centery - 6, centerx - offset, "%c:", _settings.keybindings.reloadall);
mvprintw (centery - 5, centerx - offset, "%c:", _settings.keybindings.reload);
mvprintw (centery - 4, centerx - offset, "%c:", _settings.keybindings.markallread);
mvprintw (centery - 3, centerx - offset, "%c:", _settings.keybindings.dfltbrowser);
mvprintw (centery - 2, centerx - offset, "%c, %c:", _settings.keybindings.moveup, _settings.keybindings.movedown);
mvprintw (centery - 1, centerx - offset, "%c:", _settings.keybindings.sortfeeds);
mvprintw (centery, centerx - offset, "%c:", _settings.keybindings.categorize);
mvprintw (centery + 1, centerx - offset, "%c:", _settings.keybindings.filter);
mvprintw (centery + 2, centerx - offset, "%c:", _settings.keybindings.filtercurrent);
mvprintw (centery + 3, centerx - offset, "%c:", _settings.keybindings.nofilter);
mvprintw (centery + 4, centerx - offset, "%c:", _settings.keybindings.newheadlines);
mvprintw (centery + 5, centerx - offset, "%c:", _settings.keybindings.perfeedfilter);
mvaddstr (centery + 6, centerx - offset, _("tab:"));
mvprintw (centery + 7, centerx - offset, "%c:", _settings.keybindings.about);
mvprintw (centery + 8, centerx - offset, "%c:", _settings.keybindings.quit);
// Descriptions
mvaddstr (centery - 9, centerx - offsetstr, _("Add RSS feed..."));
mvaddstr (centery - 8, centerx - offsetstr, _("Delete highlighted RSS feed..."));
mvaddstr (centery - 7, centerx - offsetstr, _("Rename feed..."));
mvaddstr (centery - 6, centerx - offsetstr, _("Reload all feeds"));
mvaddstr (centery - 5, centerx - offsetstr, _("Reload this feed"));
mvaddstr (centery - 4, centerx - offsetstr, _("Mark all read"));
mvaddstr (centery - 3, centerx - offsetstr, _("Change default browser..."));
mvaddstr (centery - 2, centerx - offsetstr, _("Move item up, down"));
mvaddstr (centery - 1, centerx - offsetstr, _("Sort feed list alphabetically"));
mvaddstr (centery, centerx - offsetstr, _("Categorize feed..."));
mvaddstr (centery + 1, centerx - offsetstr, _("Apply filter..."));
mvaddstr (centery + 2, centerx - offsetstr, _("Only current category"));
mvaddstr (centery + 3, centerx - offsetstr, _("Remove filter"));
mvaddstr (centery + 4, centerx - offsetstr, _("Show new headlines"));
mvaddstr (centery + 5, centerx - offsetstr, _("Add conversion filter..."));
mvaddstr (centery + 6, centerx - offsetstr, _("Type Ahead Find"));
mvaddstr (centery + 7, centerx - offsetstr, _("About"));
mvaddstr (centery + 8, centerx - offsetstr, _("Quit program"));
attroff (WA_REVERSE);
UIStatus (_("Press the any(tm) key to exit help screen."), 0, 0);
getch();
}
void UIDisplayFeedHelp (void)
{
unsigned centerx = COLS / 2u, centery = LINES / 2u;
UISupportDrawBox (centerx - 20, centery - 6, centerx + 24, centery + 7);
attron (WA_REVERSE);
// Keys
const int offset = 18, offsetstr = 7;
mvprintw (centery - 5, centerx - offset, _("%c, up:"), _settings.keybindings.prev);
mvprintw (centery - 4, centerx - offset, _("%c, down:"), _settings.keybindings.next);
mvaddstr (centery - 3, centerx - offset, _("enter:"));
mvprintw (centery - 2, centerx - offset, "%c:", _settings.keybindings.reload);
mvprintw (centery - 1, centerx - offset, "%c:", _settings.keybindings.forcereload);
mvprintw (centery, centerx - offset, "%c:", _settings.keybindings.urljump);
mvprintw (centery + 1, centerx - offset, "%c:", _settings.keybindings.urljump2);
mvprintw (centery + 2, centerx - offset, "%c:", _settings.keybindings.markread);
mvprintw (centery + 3, centerx - offset, "%c:", _settings.keybindings.markunread);
mvprintw (centery + 4, centerx - offset, "%c:", _settings.keybindings.feedinfo);
mvaddstr (centery + 5, centerx - offset, _("tab:"));
mvprintw (centery + 6, centerx - offset, "%c:", _settings.keybindings.prevmenu);
// Descriptions
mvprintw (centery - 5, centerx - offsetstr, _("Previous item"));
mvprintw (centery - 4, centerx - offsetstr, _("Next item"));
mvaddstr (centery - 3, centerx - offsetstr, _("View item"));
mvprintw (centery - 2, centerx - offsetstr, _("Reload this feed"));
mvprintw (centery - 1, centerx - offsetstr, _("Force reload this feed"));
mvprintw (centery, centerx - offsetstr, _("Open homepage"));
mvprintw (centery + 1, centerx - offsetstr, _("Open link"));
mvprintw (centery + 2, centerx - offsetstr, _("Mark all read"));
mvprintw (centery + 3, centerx - offsetstr, _("Toggle item read status"));
mvprintw (centery + 4, centerx - offsetstr, _("Show feed info..."));
mvaddstr (centery + 5, centerx - offsetstr, _("Type Ahead Find"));
mvprintw (centery + 6, centerx - offsetstr, _("Return to main menu"));
attroff (WA_REVERSE);
UIStatus (_("Press the any(tm) key to exit help screen."), 0, 0);
getch();
}
void UIDisplayItemHelp (void)
{
unsigned centerx = COLS / 2u, centery = LINES / 2u;
UISupportDrawBox (centerx - 18, centery - 2, centerx + 18, centery + 3);
attron (WA_REVERSE);
// Keys
const int offset = 16, offsetstr = 6;
mvprintw (centery - 1, centerx - offset, "%c, <-:", _settings.keybindings.prev);
mvprintw (centery, centerx - offset, "%c, ->:", _settings.keybindings.next);
mvprintw (centery + 1, centerx - offset, "%c:", _settings.keybindings.urljump);
mvprintw (centery + 2, centerx - offset, _("%c, enter:"), _settings.keybindings.prevmenu);
// Descriptions
mvaddstr (centery - 1, centerx - offsetstr, _("Previous item"));
mvaddstr (centery, centerx - offsetstr, _("Next item"));
mvaddstr (centery + 1, centerx - offsetstr, _("Open link"));
mvaddstr (centery + 2, centerx - offsetstr, _("Return to overview"));
attroff (WA_REVERSE);
UIStatus (_("Press the any(tm) key to exit help screen."), 0, 0);
getch();
}
// Add/remove categories for given feed. This takes over the main interface while running.
void CategorizeFeed (struct feed* current_feed)
{
// Return if we got passed a NULL pointer (no feeds added to main program).
if (current_feed == NULL)
return;
// Determine number of global categories.
unsigned nglobalcat = 0;
for (const struct categories * c = _settings.global_categories; c; c = c->next)
++nglobalcat;
// We're taking over the program!
while (1) {
// Determine number of categories for current_feed.
unsigned nfeedcat = 0;
for (const struct feedcategories * c = current_feed->feedcategories; c; c = c->next)
++nfeedcat;
UISupportDrawBox ((COLS / 2) - 37, 2, (COLS / 2) + 37, 2 + 3 + nglobalcat + 1);
attron (WA_REVERSE);
mvprintw (3, (COLS / 2) - ((strlen (_("Category configuration for %s")) + strlen (current_feed->title)) / 2), _("Category configuration for %s"), current_feed->title);
char catletter = '1';
// No category defined yet
if (current_feed->feedcategories == NULL) {
unsigned y = 5;
mvaddstr (y, (COLS / 2) - 33, _("No category defined. Select one or add a new category:"));
for (const struct categories * c = _settings.global_categories; c; ++y, c = c->next) {
mvprintw (y + 1, COLS / 2 - 33, "%c. %s", catletter, c->name);
if (++catletter == '9' + 1)
catletter = 'a'; // Fast forward to 'a' after the digits
}
char tmp[128];
snprintf (tmp, sizeof (tmp), _("Select category number to add, press 'A' to add a new category or '%c' to quit."), _settings.keybindings.quit);
UIStatus (tmp, 0, 0);
} else {
unsigned y = 5;
mvaddstr (y, (COLS / 2) - 33, _("Categories defined for this feed:"));
for (const struct feedcategories * c = current_feed->feedcategories; c; ++y, c = c->next) {
mvprintw (y + 1, COLS / 2 - 33, "%c. %s", catletter, c->name);
if (++catletter == '9' + 1)
catletter = 'a'; // Fast forward to 'a' after the digits
}
char tmp[128];
snprintf (tmp, sizeof (tmp), _("Select a category number to delete, press 'A' to add a new one or '%c' to quit."), _settings.keybindings.quit);
UIStatus (tmp, 0, 0);
}
refresh();
int uiinput = getch();
if (uiinput == _settings.keybindings.quit)
return;
if (uiinput == 'A') {
if (nfeedcat && nglobalcat) {
// Clear screen area we want to "draw" to.
UISupportDrawBox ((COLS / 2) - 37, 5, (COLS / 2) + 37, 2 + 3 + nglobalcat + 1);
attron (WA_REVERSE);
catletter = '1';
unsigned y = 5;
mvaddstr (y, (COLS / 2) - 33, _("Select a new category or add a new one:"));
for (const struct categories * c = _settings.global_categories; c; ++y, c = c->next) {
mvprintw (y + 1, COLS / 2 - 33, "%c. %s", catletter, c->name);
if (++catletter == '9' + 1)
catletter = 'a'; // Fast forward to 'a' after the digits
}
char tmp[128];
snprintf (tmp, sizeof (tmp), _("Select category number to add, press 'A' to add a new category or '%c' to quit."), _settings.keybindings.quit);
UIStatus (tmp, 0, 0);
uiinput = getch();
}
if (uiinput == 'A') {
// Clear screen area we want to "draw" to.
UISupportDrawBox ((COLS / 2) - 37, 5, (COLS / 2) + 37, 2 + 3 + nglobalcat + 1);
attron (WA_REVERSE);
UIStatus (_("Enter new category name."), 0, 0);
char* newcategory = UIOneLineEntryField (COLS / 2 - 33, 5);
if (strlen (newcategory) == 0)
UIStatus (_("Aborted."), 1, 0);
else if (!FeedCategoryExists (current_feed, newcategory))
FeedCategoryAdd (current_feed, newcategory);
else
UIStatus (_("Category already defined for this feed!"), 1, 0);
free (newcategory);
} else // To add category below.
nfeedcat = 0;
}
// If uiinput < i (ASCII of max selectable element) ignore event.
if (((uiinput >= '1' && uiinput <= '9') || (uiinput >= 'a' && uiinput <= 'z')) && uiinput < catletter) {
unsigned selcat;
if (uiinput <= '9')
selcat = uiinput - '0';
else
selcat = uiinput - ('a' - 10);
if (nfeedcat) { // feed categories are only deleted in this dialog
const struct feedcategories* c = current_feed->feedcategories;
for (; c && selcat > 1; --selcat, c = c->next) {
}
FeedCategoryDelete (current_feed, c->name);
} else { // global categories are only added
const struct categories* c = _settings.global_categories;
for (; c && selcat > 1; --selcat, c = c->next) {
}
FeedCategoryAdd (current_feed, c->name);
}
}
}
}
// Allocates and returns a filter string the user has chosen from the list of
// available categories.
// If no filter is chosen a NULL pointer is returned.
char* DialogGetCategoryFilter (void)
{
// Determine number of global categories.
unsigned nglobalcat = 0;
for (const struct categories * c = _settings.global_categories; c; c = c->next)
++nglobalcat;
UISupportDrawBox ((COLS / 2) - 35, 2, (COLS / 2) + 35, nglobalcat + 4);
attron (WA_REVERSE);
mvaddstr (3, (COLS / 2) - (strlen (_("Select filter to apply")) / 2), _("Select filter to apply"));
char catletter = '1';
unsigned y = 3;
for (const struct categories * c = _settings.global_categories; c; ++y, c = c->next) {
mvprintw (y + 1, (COLS / 2) - 33, "%c. %s", catletter, c->name);
if (++catletter == '9' + 1)
catletter = 'a'; // Fast forward to 'a' after the digits
}
UIStatus (_("Select a category number or any other key to reset filters."), 0, 0);
refresh();
// If uiinput < catletter (ASCII of max selectable element) ignore event.
int uiinput = getch();
if (uiinput < '1' || (uiinput > '9' && uiinput < 'a') || uiinput > 'z' || uiinput >= catletter)
return NULL;
unsigned sel;
if (uiinput <= '9')
sel = uiinput - '0';
else
sel = uiinput - ('a' - 10);
const struct categories* c = _settings.global_categories;
for (; c && sel > 1; --sel, c = c->next) {
}
return strdup (c->name);
}
int UIPerFeedFilter (struct feed* current_feed)
{
if (current_feed->smartfeed != 0)
return -1;
// Clear screen area we want to "draw" to.
attron (WA_REVERSE);
UISupportDrawBox (3, 5, COLS - 4, 7);
UIStatus (_("Enter script to pipe feed through."), 0, 0);
char* newstring = UIOneLineEntryField (5, 6);
if (strlen (newstring) == 0) { // If strlen is zero, return 1.
free (newstring);
return 1;
} else if (strstr (newstring, "|") != NULL) { // If newname contains "|", abort since this is used as a delimiter for the config file.
free (newstring);
return 3;
} else {
free (current_feed->perfeedfilter);
current_feed->perfeedfilter = newstring;
return 0;
}
}
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