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netsurf/desktop/browser.c

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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
*/
#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "curl/curl.h"
#include "libxml/debugXML.h"
#include "netsurf/utils/config.h"
#include "netsurf/content/cache.h"
#include "netsurf/content/fetchcache.h"
#include "netsurf/css/css.h"
#ifdef WITH_AUTH
#include "netsurf/desktop/401login.h"
#endif
#include "netsurf/desktop/browser.h"
#include "netsurf/render/box.h"
#include "netsurf/render/font.h"
#include "netsurf/render/form.h"
#include "netsurf/render/layout.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/messages.h"
#include "netsurf/utils/utils.h"
static void browser_window_start_throbber(struct browser_window* bw);
static void browser_window_text_selection(struct browser_window* bw,
unsigned long click_x, unsigned long click_y, int click_type);
static void browser_window_clear_text_selection(struct browser_window* bw);
static void browser_window_change_text_selection(struct browser_window* bw, struct box_position* new_start, struct box_position* new_end);
static int redraw_box_list(struct browser_window* bw, struct box* current,
unsigned long x, unsigned long y, struct box_position* start,
struct box_position* end, int* plot);
static void browser_window_redraw_boxes(struct browser_window* bw, struct box_position* start, struct box_position* end);
static void browser_window_follow_link(struct browser_window* bw,
unsigned long click_x, unsigned long click_y, int click_type);
static void browser_window_open_location_post(struct browser_window* bw,
const char* url0
#ifdef WITH_POST
, char *post_urlenc,
struct form_successful_control *post_multipart
#endif
);
static void browser_window_callback(content_msg msg, struct content *c,
void *p1, void *p2, const char *error);
static void download_window_callback(content_msg msg, struct content *c,
void *p1, void *p2, const char *error);
static void clear_radio_gadgets(struct browser_window* bw, struct box* box, struct form_control* group);
static void gui_redraw_gadget2(struct browser_window* bw, struct box* box, struct form_control* g,
unsigned long x, unsigned long y);
static void browser_window_gadget_select(struct browser_window* bw, struct form_control* g, int item);
static int browser_window_gadget_click(struct browser_window* bw, unsigned long click_x, unsigned long click_y);
static void browser_form_submit(struct browser_window *bw, struct form *form,
struct form_control *submit_button);
static void browser_window_textarea_click(struct browser_window* bw,
unsigned long actual_x, unsigned long actual_y,
long x, long y,
struct box *box);
static void browser_window_textarea_callback(struct browser_window *bw, char key, void *p);
static void browser_window_input_click(struct browser_window* bw,
unsigned long actual_x, unsigned long actual_y,
unsigned long x, unsigned long y,
struct box *input);
static void browser_window_input_callback(struct browser_window *bw, char key, void *p);
static void browser_window_place_caret(struct browser_window *bw, int x, int y,
int height, void (*callback)(struct browser_window *bw, char key, void *p), void *p);
void browser_window_start_throbber(struct browser_window* bw)
{
bw->throbbing = 1;
gui_window_start_throbber(bw->window);
return;
}
void browser_window_stop_throbber(struct browser_window* bw)
{
bw->throbbing = 0;
gui_window_stop_throbber(bw->window);
}
void browser_window_reformat(struct browser_window* bw, int scroll_to_top)
{
LOG(("bw = %p", bw));
assert(bw != 0);
if (bw->current_content == NULL)
return;
if (bw->current_content->title == 0)
gui_window_set_title(bw->window, bw->url);
else
gui_window_set_title(bw->window, bw->current_content->title);
gui_window_set_extent(bw->window, bw->current_content->width, bw->current_content->height);
if (scroll_to_top)
gui_window_set_scroll(bw->window, 0, 0);
gui_window_redraw_window(bw->window);
LOG(("done"));
}
void browser_window_back(struct browser_window* bw)
{
}
void browser_window_forward(struct browser_window* bw)
{
}
struct browser_window* create_browser_window(int flags, int width, int height
#ifdef WITH_FRAMES
, struct browser_window *parent
#endif
)
{
struct browser_window* bw;
bw = (struct browser_window*) xcalloc(1, sizeof(struct browser_window));
bw->flags = flags;
bw->throbbing = 0;
bw->format_width = width;
bw->format_height = height;
bw->scale.mult = 1;
bw->scale.div = 1;
bw->current_content = NULL;
bw->loading_content = NULL;
bw->history_entry = 0;
bw->url = NULL;
bw->caret_callback = 0;
#ifdef WITH_FRAMES
bw->parent = parent;
if (bw->parent != NULL) {
bw->parent->children = xrealloc(bw->parent->children,
(bw->parent->no_children+1) *
sizeof(struct browser_window));
bw->parent->children[bw->parent->no_children] = bw;
bw->parent->no_children++;
bw->window = NULL; /* This is filled in by frame_add_instance */
}
else {
#endif
bw->window = gui_create_browser_window(bw);
#ifdef WITH_FRAMES
}
#endif
return bw;
}
void browser_window_set_status(struct browser_window* bw, const char* text)
{
if (bw->window != NULL)
gui_window_set_status(bw->window, text);
}
void browser_window_destroy(struct browser_window* bw
#ifdef WITH_FRAMES
, bool self
#endif
)
{
/*unsigned int i;*/
LOG(("bw = %p", bw));
assert(bw != 0);
#ifdef WITH_FRAMES
if (bw->no_children == 0 && bw->parent != NULL) { /* leaf node -> delete */
if (bw->current_content != NULL) {
if (bw->current_content->status == CONTENT_STATUS_DONE)
content_remove_instance(bw->current_content, bw, 0, 0, 0, &bw->current_content_state);
#ifdef WITH_AUTH
login_list_remove(bw->current_content->url);
#endif
}
xfree(bw->url);
xfree(bw);
return;
}
for (i=0; i!=bw->no_children; i++) { /* non-leaf node -> kill children */
browser_window_destroy(bw->children[i], true);
}
/* all children killed -> remove this node */
if (self || bw->parent != NULL) {
#endif
if (bw->current_content != NULL) {
if (bw->current_content->status == CONTENT_STATUS_DONE)
content_remove_instance(bw->current_content, bw, 0, 0, 0, &bw->current_content_state);
content_remove_user(bw->current_content, browser_window_callback, bw, 0);
#ifdef WITH_AUTH
login_list_remove(bw->current_content->url);
#endif
}
if (bw->loading_content != NULL) {
content_remove_user(bw->loading_content, browser_window_callback, bw, 0);
}
xfree(bw->url);
gui_window_destroy(bw->window);
#ifdef WITH_FRAMES
xfree(bw->children);
#endif
xfree(bw);
#ifdef WITH_FRAMES
}
else {
bw->no_children = 0;
xfree(bw->children);
}
#endif
LOG(("end"));
}
void browser_window_open_location_historical(struct browser_window* bw,
const char* url
#ifdef WITH_POST
, char *post_urlenc,
struct form_successful_control *post_multipart
#endif
)
{
#ifdef WITH_AUTH
struct login *li;
#endif
LOG(("bw = %p, url = %s", bw, url));
assert(bw != 0 && url != 0);
/* Check window still exists, if not, don't bother going any further */
if (!gui_window_in_list(bw->window)) return;
#ifdef WITH_FRAMES
if (bw->url != NULL)
browser_window_destroy(bw, false);
#endif
#ifdef WITH_AUTH
if ((li = login_list_get(url)) == NULL) {
if (bw->current_content != NULL) {
login_list_remove(bw->current_content->url);
}
}
#endif
browser_window_set_status(bw, "Opening page...");
browser_window_start_throbber(bw);
bw->time0 = clock();
bw->history_add = false;
bw->loading_content = fetchcache(url, 0, browser_window_callback, bw, 0,
gui_window_get_width(bw->window), 0, false
#ifdef WITH_POST
,post_urlenc, post_multipart
#endif
#ifdef WITH_COOKIES
, true
#endif
);
if (bw->loading_content == 0) {
browser_window_set_status(bw, "Unable to fetch document");
return;
}
if (bw->loading_content->status == CONTENT_STATUS_READY)
browser_window_callback(CONTENT_MSG_READY, bw->loading_content, bw, 0, 0);
else if (bw->loading_content->status == CONTENT_STATUS_DONE)
browser_window_callback(CONTENT_MSG_DONE, bw->loading_content, bw, 0, 0);
LOG(("end"));
}
void browser_window_open_location(struct browser_window* bw, const char* url0)
{
browser_window_open_location_post(bw, url0
#ifdef WITH_POST
, 0, 0
#endif
);
}
void browser_window_open_location_post(struct browser_window* bw,
const char* url
#ifdef WITH_POST
, char *post_urlenc,
struct form_successful_control *post_multipart
#endif
)
{
char *url1;
LOG(("bw = %p, url = %s", bw, url));
assert(bw != 0 && url != 0);
url1 = url_join(url, 0);
if (!url1)
return;
browser_window_open_location_historical(bw, url1
#ifdef WITH_POST
, post_urlenc, post_multipart
#endif
);
bw->history_add = true;
free(url1);
LOG(("end"));
}
void browser_window_callback(content_msg msg, struct content *c,
void *p1, void *p2, const char *error)
{
struct browser_window* bw = p1;
gui_safety previous_safety;
char status[40];
switch (msg)
{
case CONTENT_MSG_LOADING:
case CONTENT_MSG_READY:
case CONTENT_MSG_DONE:
if (c->type == CONTENT_OTHER) {
gui_window *download_window;
assert(bw->loading_content == c);
/* create download window and add content to it */
download_window = gui_create_download_window(c);
content_add_user(c, download_window_callback, download_window, 0);
if (msg == CONTENT_MSG_DONE)
download_window_callback(CONTENT_MSG_DONE, c, download_window, 0, 0);
/* remove content from browser window */
bw->loading_content = 0;
content_remove_user(c, browser_window_callback, bw, 0);
browser_window_stop_throbber(bw);
break;
}
if (msg == CONTENT_MSG_LOADING)
break;
previous_safety = gui_window_set_redraw_safety(bw->window, UNSAFE);
if (bw->loading_content == c) {
if (bw->url != 0)
xfree(bw->url);
bw->url = xstrdup(c->url);
gui_window_set_url(bw->window, bw->url);
if (bw->current_content != NULL)
{
if (bw->current_content->status == CONTENT_STATUS_DONE)
content_remove_instance(bw->current_content, bw, 0, 0, 0, &bw->current_content_state);
content_remove_user(bw->current_content, browser_window_callback, bw, 0);
}
bw->current_content = c;
bw->loading_content = 0;
bw->caret_callback = 0;
if (bw->history_add)
bw->history_entry = history_add(bw->history_entry, bw->url,
bw->current_content->title);
bw->history_add = false;
}
gui_window_set_redraw_safety(bw->window, previous_safety);
if (bw->current_content->status == CONTENT_STATUS_DONE) {
content_add_instance(bw->current_content, bw, 0, 0, 0, &bw->current_content_state);
browser_window_reformat(bw, 0);
content_reshape_instance(bw->current_content, bw, 0, 0, 0, &bw->current_content_state);
sprintf(status, "Page complete (%gs)", ((float) (clock() - bw->time0)) / CLOCKS_PER_SEC);
browser_window_set_status(bw, status);
browser_window_stop_throbber(bw);
} else {
browser_window_reformat(bw, 1);
browser_window_set_status(bw, c->status_message);
}
break;
case CONTENT_MSG_ERROR:
browser_window_set_status(bw, error);
if (c == bw->loading_content)
bw->loading_content = 0;
else if (c == bw->current_content)
bw->current_content = 0;
browser_window_stop_throbber(bw);
break;
case CONTENT_MSG_STATUS:
browser_window_set_status(bw, c->status_message);
break;
case CONTENT_MSG_REDIRECT:
bw->loading_content = 0;
browser_window_set_status(bw, "Redirecting");
/* error actually holds the new URL */
browser_window_open_location(bw, error);
break;
case CONTENT_MSG_REFORMAT:
browser_window_reformat(bw, 0);
break;
#ifdef WITH_AUTH
case CONTENT_MSG_AUTH:
gui_401login_open(bw, c, error);
if (c == bw->loading_content)
bw->loading_content = 0;
else if (c == bw->current_content)
bw->current_content = 0;
browser_window_stop_throbber(bw);
break;
#endif
default:
assert(0);
}
}
void download_window_callback(content_msg msg, struct content *c,
void *p1, void *p2, const char *error)
{
gui_window *download_window = p1;
switch (msg) {
case CONTENT_MSG_STATUS:
gui_download_window_update_status(download_window);
break;
case CONTENT_MSG_DONE:
gui_download_window_done(download_window);
break;
case CONTENT_MSG_ERROR:
gui_download_window_error(download_window, error);
break;
case CONTENT_MSG_READY:
/* not possible for CONTENT_OTHER */
assert(0);
break;
case CONTENT_MSG_LOADING:
case CONTENT_MSG_REDIRECT:
/* not possible at this point, handled above */
assert(0);
break;
case CONTENT_MSG_REFORMAT:
break;
#ifdef WITH_AUTH
case CONTENT_MSG_AUTH:
break;
#endif
}
}
void clear_radio_gadgets(struct browser_window* bw, struct box* box, struct form_control* group)
{
struct box* c;
if (box == NULL)
return;
if (box->gadget != 0)
{
if (box->gadget->type == GADGET_RADIO && box->gadget->name != 0 && box->gadget != group)
{
if (strcmp(box->gadget->name, group->name) == 0)
{
if (box->gadget->data.radio.selected)
{
box->gadget->data.radio.selected = 0;
gui_redraw_gadget(bw, box->gadget);
}
}
}
}
for (c = box->children; c != 0; c = c->next)
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
clear_radio_gadgets(bw, c, group);
for (c = box->float_children; c != 0; c = c->next_float)
clear_radio_gadgets(bw, c, group);
}
void gui_redraw_gadget2(struct browser_window* bw, struct box* box, struct form_control* g,
unsigned long x, unsigned long y)
{
struct box* c;
if (box->gadget == g)
{
gui_window_redraw(bw->window, x + box->x, y + box->y, x + box->x + box->width, y+box->y + box->height);
}
for (c = box->children; c != 0; c = c->next)
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
gui_redraw_gadget2(bw, c, g, box->x + x, box->y + y);
for (c = box->float_children; c != 0; c = c->next_float)
gui_redraw_gadget2(bw, c, g, box->x + x, box->y + y);
}
void gui_redraw_gadget(struct browser_window* bw, struct form_control* g)
{
assert(bw->current_content->type == CONTENT_HTML);
gui_redraw_gadget2(bw, bw->current_content->data.html.layout->children, g, 0, 0);
}
void browser_window_gadget_select(struct browser_window* bw, struct form_control* g, int item)
{
struct form_option* o;
int count;
struct box *inline_box = g->box->children->children;
int x, y;
for (count = 0, o = g->data.select.items;
o != NULL;
count++, o = o->next) {
if (!g->data.select.multiple)
o->selected = false;
if (count == item) {
if (g->data.select.multiple) {
if (o->selected) {
o->selected = false;
g->data.select.num_selected--;
} else {
o->selected = true;
g->data.select.num_selected++;
}
} else {
o->selected = true;
}
}
if (o->selected)
g->data.select.current = o;
}
xfree(inline_box->text);
if (g->data.select.num_selected == 0)
inline_box->text = xstrdup(messages_get("Form_None"));
else if (g->data.select.num_selected == 1)
inline_box->text = xstrdup(g->data.select.current->text);
else
inline_box->text = xstrdup(messages_get("Form_Many"));
inline_box->width = g->box->width;
inline_box->length = strlen(inline_box->text);
box_coords(g->box, (unsigned long*)&x, (unsigned long*)&y);
gui_window_redraw(bw->window, (unsigned int)x, (unsigned int)y,
(unsigned int)(x + g->box->width),
(unsigned int)(y + g->box->height));
}
int browser_window_gadget_click(struct browser_window* bw, unsigned long click_x, unsigned long click_y)
{
struct box_selection* click_boxes;
int found, plot_index;
int i;
unsigned long x, y;
found = 0;
click_boxes = NULL;
plot_index = 0;
assert(bw->current_content->type == CONTENT_HTML);
box_under_area(bw->current_content->data.html.layout->children,
click_x, click_y, 0, 0, &click_boxes, &found, &plot_index);
if (found == 0)
return 0;
for (i = found - 1; i >= 0; i--)
{
if (click_boxes[i].box->style->visibility == CSS_VISIBILITY_HIDDEN)
continue;
if (click_boxes[i].box->gadget)
{
struct form_control* g = click_boxes[i].box->gadget;
/* gadget clicked */
switch (g->type)
{
case GADGET_SELECT:
gui_gadget_combo(bw, g, click_x, click_y);
break;
case GADGET_CHECKBOX:
g->data.checkbox.selected = !g->data.checkbox.selected;
gui_redraw_gadget(bw, g);
break;
case GADGET_RADIO:
clear_radio_gadgets(bw, bw->current_content->data.html.layout->children, g);
g->data.radio.selected = -1;
gui_redraw_gadget(bw, g);
break;
case GADGET_SUBMIT:
if (g->form)
browser_form_submit(bw, g->form, g);
break;
case GADGET_TEXTAREA:
browser_window_textarea_click(bw,
(unsigned int)click_boxes[i].actual_x,
(unsigned int)click_boxes[i].actual_y,
(int)(click_x - click_boxes[i].actual_x),
(int)(click_y - click_boxes[i].actual_y),
click_boxes[i].box);
break;
case GADGET_TEXTBOX:
case GADGET_PASSWORD:
browser_window_input_click(bw,
(unsigned int)click_boxes[i].actual_x,
(unsigned int)click_boxes[i].actual_y,
click_x - click_boxes[i].actual_x,
click_y - click_boxes[i].actual_y,
click_boxes[i].box);
break;
case GADGET_HIDDEN:
break;
case GADGET_IMAGE:
box_coords(click_boxes[i].box, &x, &y);
g->data.image.mx = click_x - x;
g->data.image.my = click_y - y;
if (g->form)
browser_form_submit(bw, g->form, g);
break;
case GADGET_RESET:
break;
}
xfree(click_boxes);
return 1;
}
}
xfree(click_boxes);
return 0;
}
/**
* Handle clicks in a text area by placing the caret.
*/
void browser_window_textarea_click(struct browser_window* bw,
unsigned long actual_x, unsigned long actual_y,
long x, long y,
struct box *textarea)
{
/* a textarea contains one or more inline containers, which contain
* the formatted paragraphs of text as inline boxes */
int char_offset, pixel_offset, dy;
struct box *inline_container, *text_box, *ic;
for (inline_container = textarea->children;
inline_container && inline_container->y + inline_container->height < y;
inline_container = inline_container->next)
;
if (!inline_container) {
/* below the bottom of the textarea: place caret at end */
inline_container = textarea->last;
text_box = inline_container->last;
assert(text_box->type == BOX_INLINE);
assert(text_box->text && text_box->font);
font_position_in_string(text_box->text, text_box->font,
text_box->length,
(unsigned int)textarea->width,
&char_offset, &pixel_offset);
} else {
/* find the relevant text box */
y -= inline_container->y;
for (text_box = inline_container->children;
text_box && (text_box->y + text_box->height < y ||
text_box->x + text_box->width < x);
text_box = text_box->next)
;
if (!text_box) {
/* past last text box */
text_box = inline_container->last;
assert(text_box->type == BOX_INLINE);
assert(text_box->text && text_box->font);
font_position_in_string(text_box->text, text_box->font,
text_box->length,
(unsigned int)textarea->width,
&char_offset, &pixel_offset);
} else {
/* in a text box */
assert(text_box->type == BOX_INLINE);
assert(text_box->text && text_box->font);
font_position_in_string(text_box->text, text_box->font,
text_box->length,
(unsigned int)(x - text_box->x),
&char_offset, &pixel_offset);
}
}
dy = textarea->height / 2 -
(inline_container->y + text_box->y + text_box->height / 2);
if (textarea->last->y + textarea->last->height + dy < textarea->height)
dy = textarea->height - textarea->last->y - textarea->last->height;
if (0 < textarea->children->y + dy)
dy = -textarea->children->y;
for (ic = textarea->children; ic; ic = ic->next)
ic->y += dy;
textarea->gadget->caret_inline_container = inline_container;
textarea->gadget->caret_text_box = text_box;
textarea->gadget->caret_char_offset = char_offset;
browser_window_place_caret(bw,
(int)(actual_x + text_box->x + pixel_offset),
(int)(actual_y + inline_container->y + text_box->y),
text_box->height,
browser_window_textarea_callback, textarea);
gui_window_redraw(bw->window,
actual_x,
actual_y,
actual_x + textarea->width,
actual_y + textarea->height);
}
/**
* Key press callback for text areas.
*/
void browser_window_textarea_callback(struct browser_window *bw, char key, void *p)
{
struct box *textarea = p;
struct box *inline_container = textarea->gadget->caret_inline_container;
struct box *text_box = textarea->gadget->caret_text_box;
struct box *ic;
int char_offset = textarea->gadget->caret_char_offset;
int pixel_offset, dy;
unsigned long actual_x, actual_y;
unsigned long width=0, height=0;
bool reflow = false;
box_coords(textarea, &actual_x, &actual_y);
/* box_dump(textarea, 0); */
LOG(("key %i at %i in '%.*s'", key, char_offset, (int) text_box->length, text_box->text));
if (32 <= key && key != 127) {
/* normal character insertion */
text_box->text = xrealloc(text_box->text, text_box->length + 2);
memmove(text_box->text + char_offset + 1,
text_box->text + char_offset,
text_box->length - char_offset);
text_box->text[char_offset] = key;
text_box->length++;
text_box->text[text_box->length] = 0;
text_box->width = UNKNOWN_WIDTH;
char_offset++;
reflow = true;
} else if (key == 10 || key == 13) {
/* paragraph break */
struct box *new_container = box_create(0, 0, 0,
bw->current_content->data.html.box_pool);
struct box *new_text = xcalloc(1, sizeof(*new_text));
struct box *t;
new_container->type = BOX_INLINE_CONTAINER;
box_insert_sibling(inline_container, new_container);
memcpy(new_text, text_box, sizeof(*new_text));
new_text->clone = 1;
new_text->text = xcalloc(text_box->length + 1, 1);
memcpy(new_text->text, text_box->text + char_offset,
text_box->length - char_offset);
new_text->length = text_box->length - char_offset;
text_box->length = char_offset;
new_text->prev = 0;
new_text->next = text_box->next;
text_box->next = 0;
if (new_text->next)
new_text->next->prev = new_text;
else
new_container->last = new_text;
text_box->width = new_text->width = UNKNOWN_WIDTH;
new_container->last = inline_container->last;
inline_container->last = text_box;
new_container->children = new_text;
for (t = new_container->children; t; t = t->next)
t->parent = new_container;
inline_container = new_container;
text_box = inline_container->children;
char_offset = 0;
reflow = true;
} else if (key == 8 || key == 127) {
/* delete to left */
if (char_offset == 0) {
/* at the start of a text box */
struct box *prev;
if (text_box->prev) {
/* can be merged with previous text box */
} else if (inline_container->prev) {
/* merge with previous paragraph */
struct box *prev_container = inline_container->prev;
struct box *t;
for (t = inline_container->children; t; t = t->next)
t->parent = prev_container;
prev_container->last->next = inline_container->children;
inline_container->children->prev = prev_container->last;
prev_container->last = inline_container->last;
prev_container->next = inline_container->next;
if (inline_container->next)
inline_container->next->prev = prev_container;
else
inline_container->parent->last = prev_container;
inline_container->children = 0;
box_free(inline_container);
inline_container = prev_container;
} else {
/* at very beginning of text area: ignore */
return;
}
/* delete space by merging with previous text box */
prev = text_box->prev;
assert(prev->text);
prev->text = xrealloc(prev->text, prev->length + text_box->length + 1);
memcpy(prev->text + prev->length, text_box->text, text_box->length);
char_offset = prev->length;
prev->length += text_box->length;
prev->text[prev->length] = 0;
prev->width = UNKNOWN_WIDTH;
prev->next = text_box->next;
if (prev->next)
prev->next->prev = prev;
else
prev->parent->last = prev;
box_free(text_box);
text_box = prev;
} else if (char_offset == 1 && text_box->length == 1) {
/* delete this text box and add a space */
if (text_box->prev) {
struct box *prev = text_box->prev;
prev->text = xrealloc(prev->text, prev->length + 2);
prev->text[prev->length] = ' ';
prev->length++;
prev->text[prev->length] = 0;
prev->width = UNKNOWN_WIDTH;
prev->next = text_box->next;
if (prev->next)
prev->next->prev = prev;
else
prev->parent->last = prev;
box_free(text_box);
text_box = prev;
char_offset = prev->length;
} else if (text_box->next) {
struct box *next = text_box->next;
next->text = xrealloc(next->text, next->length + 2);
memmove(next->text + 1, next->text, next->length);
next->text[0] = ' ';
next->length++;
next->text[next->length] = 0;
next->width = UNKNOWN_WIDTH;
next->prev = 0;
next->parent->children = next;
box_free(text_box);
text_box = next;
char_offset = 0;
} else {
text_box->length = 0;
text_box->width = UNKNOWN_WIDTH;
char_offset--;
}
} else {
/* delete a character */
memmove(text_box->text + char_offset - 1,
text_box->text + char_offset,
text_box->length - char_offset);
text_box->length--;
text_box->width = UNKNOWN_WIDTH;
char_offset--;
}
reflow = true;
} else if (key == 28) {
/* Right cursor -> */
if ((unsigned int)char_offset == text_box->length &&
text_box == inline_container->last &&
inline_container->next) {
/* move to start of next box (if it exists) */
text_box = inline_container->next->children;
char_offset = 0;
inline_container=inline_container->next;
}
else if ((unsigned int)char_offset == text_box->length && text_box->next) {
text_box = text_box->next;
char_offset = 0;
}
else if ((unsigned int)char_offset != text_box->length) {
char_offset++;
}
else {
return;
}
} else if (key == 29) {
/* Left cursor <- */
if (char_offset == 0 &&
text_box == inline_container->children &&
inline_container->prev) {
/* move to end of previous box */
text_box = inline_container->prev->children;
inline_container=inline_container->prev;
char_offset = text_box->length;
}
else if (char_offset == 0 && text_box->next) {
text_box = text_box->next;
char_offset = text_box->length;
}
else if (char_offset != 0) {
char_offset--;
}
else {
return;
}
} else if (key == 30) {
/* Up Cursor */
if (text_box == inline_container->children &&
inline_container->prev) {
text_box = inline_container->prev->children;
inline_container = inline_container->prev;
if ((unsigned int)char_offset > text_box->length) {
char_offset = text_box->length;
}
}
else if (text_box->prev) {
text_box = text_box->prev;
if ((unsigned int)char_offset > text_box->length) {
char_offset = text_box->length;
}
}
else {
return;
}
} else if (key == 31) {
/* Down cursor */
if (text_box == inline_container->last &&
inline_container->next) {
text_box = inline_container->next->children;
inline_container = inline_container->next;
if ((unsigned int)char_offset > text_box->length) {
char_offset = text_box->length;
}
}
else if (text_box->next) {
text_box = text_box->next;
if ((unsigned int)char_offset > text_box->length) {
char_offset = text_box->length;
}
}
else {
return;
}
} else {
return;
}
box_dump(textarea, 0);
/* for (struct box *ic = textarea->children; ic; ic = ic->next) {
assert(ic->type == BOX_INLINE_CONTAINER);
assert(ic->parent == textarea);
if (ic->next) assert(ic->next->prev == ic);
if (ic->prev) assert(ic->prev->next == ic);
if (!ic->next) assert(textarea->last == ic);
for (struct box *t = ic->children; t; t = t->next) {
assert(t->type == BOX_INLINE);
assert(t->text);
assert(t->font);
assert(t->parent == ic);
if (t->next) assert(t->next->prev == t);
if (t->prev) assert(t->prev->next == t);
if (!t->next) assert(ic->last == t);
}
} */
if (reflow) {
/* reflow textarea preserving width and height */
width = textarea->width;
height = textarea->height;
layout_block(textarea, (unsigned int)textarea->parent->width,
textarea, 0, 0);
textarea->width = width;
textarea->height = height;
}
/* box_dump(textarea, 0); */
/* for (struct box *ic = textarea->children; ic; ic = ic->next) {
assert(ic->type == BOX_INLINE_CONTAINER);
assert(ic->parent == textarea);
if (ic->next) assert(ic->next->prev == ic);
if (ic->prev) assert(ic->prev->next == ic);
if (!ic->next) assert(textarea->last == ic);
for (struct box *t = ic->children; t; t = t->next) {
assert(t->type == BOX_INLINE);
assert(t->text);
assert(t->font);
assert(t->parent == ic);
if (t->next) assert(t->next->prev == t);
if (t->prev) assert(t->prev->next == t);
if (!t->next) assert(ic->last == t);
}
} */
if (text_box->length < (unsigned int)char_offset) {
/* the text box has been split and the caret is in the second part */
char_offset -= (text_box->length + 1); /* +1 for the space */
text_box = text_box->next;
assert(text_box);
assert((unsigned int)char_offset <= text_box->length);
}
dy = textarea->height / 2 -
(inline_container->y + text_box->y + text_box->height / 2);
if (textarea->last->y + textarea->last->height + dy < textarea->height)
dy = textarea->height - textarea->last->y - textarea->last->height;
if (0 < textarea->children->y + dy)
dy = -textarea->children->y;
for (ic = textarea->children; ic; ic = ic->next)
ic->y += dy;
pixel_offset = font_width(text_box->font, text_box->text,
(unsigned int)char_offset);
textarea->gadget->caret_inline_container = inline_container;
textarea->gadget->caret_text_box = text_box;
textarea->gadget->caret_char_offset = char_offset;
browser_window_place_caret(bw,
(int)(actual_x + text_box->x + pixel_offset),
(int)(actual_y + inline_container->y + text_box->y),
text_box->height,
browser_window_textarea_callback, textarea);
gui_window_redraw(bw->window,
actual_x,
actual_y,
actual_x + width,
actual_y + height);
}
/**
* Handle clicks in a text or password input box by placing the caret.
*/
void browser_window_input_click(struct browser_window* bw,
unsigned long actual_x, unsigned long actual_y,
unsigned long x, unsigned long y,
struct box *input)
{
int char_offset, pixel_offset;
struct box *text_box = input->children->children;
font_position_in_string(text_box->text, text_box->font,
text_box->length, x - text_box->x,
&char_offset, &pixel_offset);
text_box->x = 0;
if ((input->width < text_box->width) && (input->width / 2 < pixel_offset)) {
text_box->x = input->width / 2 - pixel_offset;
if (text_box->x < input->width - text_box->width)
text_box->x = input->width - text_box->width;
}
input->gadget->caret_char_offset = char_offset;
browser_window_place_caret(bw,
(int)(actual_x + text_box->x + pixel_offset),
(int)(actual_y + text_box->y),
text_box->height,
browser_window_input_callback, input);
gui_window_redraw(bw->window,
actual_x,
actual_y,
actual_x + input->width,
actual_y + input->height);
}
/**
* Key press callback for text or password input boxes.
*/
void browser_window_input_callback(struct browser_window *bw, char key, void *p)
{
struct box *input = p;
struct box *text_box = input->children->children;
int char_offset = input->gadget->caret_char_offset;
int pixel_offset;
unsigned long actual_x, actual_y;
struct form* form = input->gadget->form;
box_coords(input, &actual_x, &actual_y);
if ((32 <= key && key != 127) && text_box->length < input->gadget->maxlength) {
/* normal character insertion */
text_box->text = xrealloc(text_box->text, text_box->length + 2);
input->gadget->value = xrealloc(input->gadget->value, text_box->length + 2);
memmove(text_box->text + char_offset + 1,
text_box->text + char_offset,
text_box->length - char_offset);
memmove(input->gadget->value + char_offset + 1,
input->gadget->value + char_offset,
text_box->length - char_offset);
if (input->gadget->type == GADGET_PASSWORD)
text_box->text[char_offset] = '*';
else
text_box->text[char_offset] = key == ' ' ? 160 : key;
input->gadget->value[char_offset] = key;
text_box->length++;
text_box->text[text_box->length] = 0;
input->gadget->value[text_box->length] = 0;
char_offset++;
} else if ((key == 8 || key == 127) && char_offset != 0) {
/* delete to left */
memmove(text_box->text + char_offset - 1,
text_box->text + char_offset,
text_box->length - char_offset);
memmove(input->gadget->value + char_offset - 1,
input->gadget->value + char_offset,
text_box->length - char_offset);
text_box->length--;
input->gadget->value[text_box->length] = 0;
char_offset--;
} else if (key == 10 || key == 13) {
/* Return/Enter hit */
if (form)
browser_form_submit(bw, form, 0);
} else if (key == 9) {
/* Tab */
/* TODO: tabbing between inputs */
return;
} else if (key == 28 && (unsigned int)char_offset != text_box->length) {
/* Right cursor -> */
char_offset++;
} else if (key == 29 && char_offset != 0) {
/* Left cursor <- */
char_offset--;
} else {
return;
}
text_box->width = font_width(text_box->font, text_box->text,
(unsigned int)text_box->length);
pixel_offset = font_width(text_box->font, text_box->text,
(unsigned int)char_offset);
text_box->x = 0;
if ((input->width < text_box->width) && (input->width / 2 < pixel_offset)) {
text_box->x = input->width / 2 - pixel_offset;
if (text_box->x < input->width - text_box->width)
text_box->x = input->width - text_box->width;
}
input->gadget->caret_char_offset = char_offset;
browser_window_place_caret(bw,
(int)(actual_x + text_box->x + pixel_offset),
(int)(actual_y + text_box->y),
text_box->height,
browser_window_input_callback, input);
gui_window_redraw(bw->window,
actual_x,
actual_y,
actual_x + input->width,
actual_y + input->height);
}
/**
* Position the caret and assign a callback for key presses.
*/
void browser_window_place_caret(struct browser_window *bw, int x, int y,
int height, void (*callback)(struct browser_window *bw, char key, void *p), void *p)
{
gui_window_place_caret(bw->window, x, y, height);
bw->caret_callback = callback;
bw->caret_p = p;
}
/**
* Handle key presses in a browser window.
*/
bool browser_window_key_press(struct browser_window *bw, char key)
{
if (!bw->caret_callback)
return false;
bw->caret_callback(bw, key, bw->caret_p);
return true;
}
int browser_window_action(struct browser_window* bw, struct browser_action* act)
{
switch (act->type)
{
case act_MOUSE_AT:
browser_window_follow_link(bw, act->data.mouse.x, act->data.mouse.y, 0);
break;
case act_MOUSE_CLICK:
return browser_window_gadget_click(bw, act->data.mouse.x, act->data.mouse.y);
break;
case act_CLEAR_SELECTION:
browser_window_text_selection(bw, act->data.mouse.x, act->data.mouse.y, 0);
break;
case act_START_NEW_SELECTION:
browser_window_text_selection(bw, act->data.mouse.x, act->data.mouse.y, 1);
break;
case act_ALTER_SELECTION:
browser_window_text_selection(bw, act->data.mouse.x, act->data.mouse.y, 2);
break;
case act_FOLLOW_LINK:
browser_window_follow_link(bw, act->data.mouse.x, act->data.mouse.y, 1);
break;
case act_FOLLOW_LINK_NEW_WINDOW:
browser_window_follow_link(bw, act->data.mouse.x, act->data.mouse.y, 2);
break;
case act_GADGET_SELECT:
browser_window_gadget_select(bw, act->data.gadget_select.g, act->data.gadget_select.item);
default:
break;
}
return 0;
}
void box_under_area(struct box* box, unsigned long x, unsigned long y, unsigned long ox, unsigned long oy,
struct box_selection** found, int* count, int* plot_index)
{
struct box* c;
if (box == NULL)
return;
*plot_index = *plot_index + 1;
if (x >= box->x + ox && x <= box->x + ox + box->width &&
y >= box->y + oy && y <= box->y + oy + box->height)
{
*found = xrealloc(*found, sizeof(struct box_selection) * (*count + 1));
(*found)[*count].box = box;
(*found)[*count].actual_x = box->x + ox;
(*found)[*count].actual_y = box->y + oy;
(*found)[*count].plot_index = *plot_index;
*count = *count + 1;
}
for (c = box->children; c != 0; c = c->next)
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
box_under_area(c, x, y, box->x + ox, box->y + oy, found, count, plot_index);
for (c = box->float_children; c != 0; c = c->next_float)
box_under_area(c, x, y, box->x + ox, box->y + oy, found, count, plot_index);
return;
}
void browser_window_follow_link(struct browser_window* bw,
unsigned long click_x, unsigned long click_y, int click_type)
{
struct box_selection* click_boxes;
int found, plot_index;
int i;
int done = 0;
found = 0;
click_boxes = NULL;
plot_index = 0;
if (bw->current_content->type != CONTENT_HTML)
return;
box_under_area(bw->current_content->data.html.layout->children,
click_x, click_y, 0, 0, &click_boxes, &found, &plot_index);
if (found == 0)
return;
for (i = found - 1; i >= 0; i--)
{
if (click_boxes[i].box->style->visibility == CSS_VISIBILITY_HIDDEN)
continue;
if (click_boxes[i].box->href != NULL)
{
char *url = url_join((char*) click_boxes[i].box->href,
bw->current_content->data.html.base_url);
if (!url)
continue;
if (click_type == 1) {
browser_window_open_location(bw, url);
}
else if (click_type == 2)
{
struct browser_window* bw_new;
bw_new = create_browser_window(browser_TITLE | browser_TOOLBAR
| browser_SCROLL_X_ALWAYS | browser_SCROLL_Y_ALWAYS, 640, 480
#ifdef WITH_FRAMES
, NULL
#endif
);
gui_window_show(bw_new->window);
browser_window_open_location(bw_new, url);
}
else if (click_type == 0)
{
browser_window_set_status(bw, url);
done = 1;
}
free(url);
break;
}
if (click_type == 0 && click_boxes[i].box->title != NULL)
{
browser_window_set_status(bw, click_boxes[i].box->title);
done = 1;
break;
}
}
if (click_type == 0 && done == 0) {
if (bw->loading_content != 0)
browser_window_set_status(bw, bw->loading_content->status_message);
else
browser_window_set_status(bw, bw->current_content->status_message);
}
free(click_boxes);
return;
}
void browser_window_text_selection(struct browser_window* bw,
unsigned long click_x, unsigned long click_y, int click_type)
{
struct box_selection* click_boxes;
int found, plot_index;
int i;
if (click_type == 0 /* click_CLEAR_SELECTION */ )
{
browser_window_clear_text_selection(bw);
return;
}
found = 0;
click_boxes = NULL;
plot_index = 0;
assert(bw->current_content->type == CONTENT_HTML);
box_under_area(bw->current_content->data.html.layout->children,
click_x, click_y, 0, 0, &click_boxes, &found, &plot_index);
if (found == 0)
return;
for (i = found - 1; i >= 0; i--)
{
if (click_boxes[i].box->type == BOX_INLINE)
{
struct box_position new_pos;
struct box_position* start;
struct box_position* end;
int click_char_offset, click_pixel_offset;
/* shortcuts */
start = &(bw->current_content->data.html.text_selection.start);
end = &(bw->current_content->data.html.text_selection.end);
if (click_boxes[i].box->text && click_boxes[i].box->font)
{
font_position_in_string(click_boxes[i].box->text,
click_boxes[i].box->font, click_boxes[i].box->length,
click_x - click_boxes[i].actual_x,
&click_char_offset, &click_pixel_offset);
}
else
{
click_char_offset = 0;
click_pixel_offset = 0;
}
new_pos.box = click_boxes[i].box;
new_pos.actual_box_x = click_boxes[i].actual_x;
new_pos.actual_box_y = click_boxes[i].actual_y;
new_pos.plot_index = click_boxes[i].plot_index;
new_pos.char_offset = click_char_offset;
new_pos.pixel_offset = click_pixel_offset;
if (click_type == 1 /* click_START_SELECTION */ )
{
/* update both start and end */
browser_window_clear_text_selection(bw);
bw->current_content->data.html.text_selection.altering = alter_UNKNOWN;
bw->current_content->data.html.text_selection.selected = 1;
memcpy(start, &new_pos, sizeof(struct box_position));
memcpy(end, &new_pos, sizeof(struct box_position));
i = -1;
}
else if (bw->current_content->data.html.text_selection.selected == 1 &&
click_type == 2 /* click_ALTER_SELECTION */)
{
/* alter selection */
if (bw->current_content->data.html.text_selection.altering
!= alter_UNKNOWN)
{
if (bw->current_content->data.html.text_selection.altering
== alter_START)
{
if (box_position_gt(&new_pos,end))
{
bw->current_content->data.html.text_selection.altering
= alter_END;
browser_window_change_text_selection(bw, end, &new_pos);
}
else
browser_window_change_text_selection(bw, &new_pos, end);
}
else
{
if (box_position_lt(&new_pos,start))
{
bw->current_content->data.html.text_selection.altering
= alter_START;
browser_window_change_text_selection(bw, &new_pos, start);
}
else
browser_window_change_text_selection(bw, start, &new_pos);
}
i = -1;
}
else
{
/* work out whether the start or end is being dragged */
int click_start_distance = 0;
int click_end_distance = 0;
int inside_block = 0;
int before_start = 0;
int after_end = 0;
if (box_position_lt(&new_pos, start))
before_start = 1;
if (box_position_gt(&new_pos, end))
after_end = 1;
if (!box_position_lt(&new_pos, start)
&& !box_position_gt(&new_pos, end))
inside_block = 1;
if (inside_block == 1)
{
click_start_distance = box_position_distance(start, &new_pos);
click_end_distance = box_position_distance(end, &new_pos);
}
if (before_start == 1
|| (after_end == 0 && inside_block == 1
&& click_start_distance < click_end_distance))
{
/* alter the start position */
bw->current_content->data.html.text_selection.altering
= alter_START;
browser_window_change_text_selection(bw, &new_pos, end);
i = -1;
}
else if (after_end == 1
|| (before_start == 0 && inside_block == 1
&& click_start_distance >= click_end_distance))
{
/* alter the end position */
bw->current_content->data.html.text_selection.altering = alter_END;
browser_window_change_text_selection(bw, start, &new_pos);
i = -1;
}
}
}
}
}
free(click_boxes);
return;
}
void browser_window_clear_text_selection(struct browser_window* bw)
{
struct box_position* old_start;
struct box_position* old_end;
assert(bw->current_content->type == CONTENT_HTML);
old_start = &(bw->current_content->data.html.text_selection.start);
old_end = &(bw->current_content->data.html.text_selection.end);
if (bw->current_content->data.html.text_selection.selected == 1)
{
bw->current_content->data.html.text_selection.selected = 0;
browser_window_redraw_boxes(bw, old_start, old_end);
}
bw->current_content->data.html.text_selection.altering = alter_UNKNOWN;
}
void browser_window_change_text_selection(struct browser_window* bw,
struct box_position* new_start, struct box_position* new_end)
{
struct box_position start;
struct box_position end;
assert(bw->current_content->type == CONTENT_HTML);
memcpy(&start, &(bw->current_content->data.html.text_selection.start), sizeof(struct box_position));
memcpy(&end, &(bw->current_content->data.html.text_selection.end), sizeof(struct box_position));
if (!box_position_eq(new_start, &start))
{
if (box_position_lt(new_start, &start))
browser_window_redraw_boxes(bw, new_start, &start);
else
browser_window_redraw_boxes(bw, &start, new_start);
memcpy(&start, new_start, sizeof(struct box_position));
}
if (!box_position_eq(new_end, &end))
{
if (box_position_lt(new_end, &end))
browser_window_redraw_boxes(bw, new_end, &end);
else
browser_window_redraw_boxes(bw, &end, new_end);
memcpy(&end, new_end, sizeof(struct box_position));
}
memcpy(&(bw->current_content->data.html.text_selection.start), &start, sizeof(struct box_position));
memcpy(&(bw->current_content->data.html.text_selection.end), &end, sizeof(struct box_position));
bw->current_content->data.html.text_selection.selected = 1;
}
int box_position_lt(struct box_position* x, struct box_position* y)
{
return (x->plot_index < y->plot_index ||
(x->plot_index == y->plot_index && x->char_offset < y->char_offset));
}
int box_position_gt(struct box_position* x, struct box_position* y)
{
return (x->plot_index > y->plot_index ||
(x->plot_index == y->plot_index && x->char_offset > y->char_offset));
}
int box_position_eq(struct box_position* x, struct box_position* y)
{
return (x->plot_index == y->plot_index && x->char_offset == y->char_offset);
}
int box_position_distance(struct box_position* x, struct box_position* y)
{
int dx = (y->actual_box_x + y->pixel_offset)
- (x->actual_box_x + x->pixel_offset);
int dy = (y->actual_box_y + y->box->height / 2)
- (x->actual_box_y + x->box->height / 2);
return dx*dx + dy*dy;
}
unsigned long redraw_min_x = LONG_MAX;
unsigned long redraw_min_y = LONG_MAX;
unsigned long redraw_max_x = 0;
unsigned long redraw_max_y = 0;
int redraw_box_list(struct browser_window* bw, struct box* current,
unsigned long x, unsigned long y, struct box_position* start,
struct box_position* end, int* plot)
{
struct box* c;
if (current == start->box)
*plot = 1;
if (*plot >= 1 && current->type == BOX_INLINE)
{
unsigned long minx = x + current->x;
unsigned long miny = y + current->y;
unsigned long maxx = x + current->x + current->width;
unsigned long maxy = y + current->y + current->height;
if (minx < redraw_min_x)
redraw_min_x = minx;
if (miny < redraw_min_y)
redraw_min_y = miny;
if (maxx > redraw_max_x)
redraw_max_x = maxx;
if (maxy > redraw_max_y)
redraw_max_y = maxy;
*plot = 2;
}
if (current == end->box)
return 1;
for (c = current->children; c != 0; c = c->next)
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
if (redraw_box_list(bw, c, x + current->x, y + current->y,
start, end, plot) == 1)
return 1;
for (c = current->float_children; c != 0; c = c->next_float)
if (redraw_box_list(bw, c, x + current->x, y + current->y,
start, end, plot) == 1)
return 1;
return 0;
}
void browser_window_redraw_boxes(struct browser_window* bw, struct box_position* start, struct box_position* end)
{
int plot = 0;
assert(bw->current_content->type == CONTENT_HTML);
if (box_position_eq(start, end))
return;
redraw_min_x = LONG_MAX;
redraw_min_y = LONG_MAX;
redraw_max_x = 0;
redraw_max_y = 0;
redraw_box_list(bw, bw->current_content->data.html.layout,
0,0, start, end, &plot);
if (plot == 2)
gui_window_redraw(bw->window, redraw_min_x, redraw_min_y,
redraw_max_x, redraw_max_y);
}
/**
* Collect controls and submit a form.
*/
void browser_form_submit(struct browser_window *bw, struct form *form,
struct form_control *submit_button)
{
char *data = 0, *url = 0, *url1 = 0, *base;
struct form_successful_control *success;
assert(form);
assert(bw->current_content->type == CONTENT_HTML);
success = form_successful_controls(form, submit_button);
base = bw->current_content->data.html.base_url;
switch (form->method) {
case method_GET:
data = form_url_encode(success);
url = xcalloc(1, strlen(form->action) + strlen(data) + 2);
if(form->action[strlen(form->action)-1] == '?') {
sprintf(url, "%s%s", form->action, data);
}
else {
sprintf(url, "%s?%s", form->action, data);
}
url1 = url_join(url, base);
if (!url1)
break;
browser_window_open_location(bw, url1);
break;
#ifdef WITH_POST
case method_POST_URLENC:
data = form_url_encode(success);
url = url_join(form->action, base);
if (!url)
break;
browser_window_open_location_post(bw, url, data, 0);
break;
case method_POST_MULTIPART:
url = url_join(form->action, base);
browser_window_open_location_post(bw, url, 0, success);
break;
#else
case method_POST_URLENC:
case method_POST_MULTIPART:
break;
#endif
default:
assert(0);
}
form_free_successful(success);
free(data);
free(url);
free(url1);
}
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