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netsurf/render/html_interaction.c

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/*
* Copyright 2006 James Bursa <bursa@users.sourceforge.net>
* Copyright 2006 Richard Wilson <info@tinct.net>
* Copyright 2008 Michael Drake <tlsa@netsurf-browser.org>
* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* User interaction with a CONTENT_HTML (implementation).
*/
#include <assert.h>
#include <stdbool.h>
#include <dom/dom.h>
#include "utils/corestrings.h"
#include "utils/messages.h"
#include "utils/utils.h"
#include "utils/log.h"
#include "content/content.h"
#include "content/hlcache.h"
#include "desktop/browser.h"
#include "desktop/frames.h"
#include "desktop/mouse.h"
#include "utils/nsoption.h"
#include "desktop/scrollbar.h"
#include "desktop/selection.h"
#include "desktop/textarea.h"
#include "desktop/textinput.h"
#include "desktop/font.h"
#include "javascript/js.h"
#include "desktop/gui_misc.h"
#include "desktop/gui_internal.h"
#include "render/box.h"
#include "render/box_textarea.h"
#include "render/font.h"
#include "render/form_internal.h"
#include "render/html_internal.h"
#include "render/imagemap.h"
#include "render/search.h"
/**
* Get pointer shape for given box
*
* \param box box in question
* \param imagemap whether an imagemap applies to the box
*/
static browser_pointer_shape get_pointer_shape(struct box *box, bool imagemap)
{
browser_pointer_shape pointer;
css_computed_style *style;
enum css_cursor_e cursor;
lwc_string **cursor_uris;
if (box->type == BOX_FLOAT_LEFT || box->type == BOX_FLOAT_RIGHT)
style = box->children->style;
else
style = box->style;
if (style == NULL)
return BROWSER_POINTER_DEFAULT;
cursor = css_computed_cursor(style, &cursor_uris);
switch (cursor) {
case CSS_CURSOR_AUTO:
if (box->href || (box->gadget &&
(box->gadget->type == GADGET_IMAGE ||
box->gadget->type == GADGET_SUBMIT)) ||
imagemap) {
/* link */
pointer = BROWSER_POINTER_POINT;
} else if (box->gadget &&
(box->gadget->type == GADGET_TEXTBOX ||
box->gadget->type == GADGET_PASSWORD ||
box->gadget->type == GADGET_TEXTAREA)) {
/* text input */
pointer = BROWSER_POINTER_CARET;
} else {
/* html content doesn't mind */
pointer = BROWSER_POINTER_AUTO;
}
break;
case CSS_CURSOR_CROSSHAIR:
pointer = BROWSER_POINTER_CROSS;
break;
case CSS_CURSOR_POINTER:
pointer = BROWSER_POINTER_POINT;
break;
case CSS_CURSOR_MOVE:
pointer = BROWSER_POINTER_MOVE;
break;
case CSS_CURSOR_E_RESIZE:
pointer = BROWSER_POINTER_RIGHT;
break;
case CSS_CURSOR_W_RESIZE:
pointer = BROWSER_POINTER_LEFT;
break;
case CSS_CURSOR_N_RESIZE:
pointer = BROWSER_POINTER_UP;
break;
case CSS_CURSOR_S_RESIZE:
pointer = BROWSER_POINTER_DOWN;
break;
case CSS_CURSOR_NE_RESIZE:
pointer = BROWSER_POINTER_RU;
break;
case CSS_CURSOR_SW_RESIZE:
pointer = BROWSER_POINTER_LD;
break;
case CSS_CURSOR_SE_RESIZE:
pointer = BROWSER_POINTER_RD;
break;
case CSS_CURSOR_NW_RESIZE:
pointer = BROWSER_POINTER_LU;
break;
case CSS_CURSOR_TEXT:
pointer = BROWSER_POINTER_CARET;
break;
case CSS_CURSOR_WAIT:
pointer = BROWSER_POINTER_WAIT;
break;
case CSS_CURSOR_PROGRESS:
pointer = BROWSER_POINTER_PROGRESS;
break;
case CSS_CURSOR_HELP:
pointer = BROWSER_POINTER_HELP;
break;
default:
pointer = BROWSER_POINTER_DEFAULT;
break;
}
return pointer;
}
/**
* Start drag scrolling the contents of a box
*
* \param box the box to be scrolled
* \param x x ordinate of initial mouse position
* \param y y ordinate
*/
static void html_box_drag_start(struct box *box, int x, int y)
{
int box_x, box_y;
int scroll_mouse_x, scroll_mouse_y;
box_coords(box, &box_x, &box_y);
if (box->scroll_x != NULL) {
scroll_mouse_x = x - box_x ;
scroll_mouse_y = y - (box_y + box->padding[TOP] +
box->height + box->padding[BOTTOM] -
SCROLLBAR_WIDTH);
scrollbar_start_content_drag(box->scroll_x,
scroll_mouse_x, scroll_mouse_y);
} else if (box->scroll_y != NULL) {
scroll_mouse_x = x - (box_x + box->padding[LEFT] +
box->width + box->padding[RIGHT] -
SCROLLBAR_WIDTH);
scroll_mouse_y = y - box_y;
scrollbar_start_content_drag(box->scroll_y,
scroll_mouse_x, scroll_mouse_y);
}
}
/**
* End overflow scroll scrollbar drags
*
* \param html html content
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
* \param dir Direction of drag
*/
static size_t html_selection_drag_end(struct html_content *html,
browser_mouse_state mouse, int x, int y, int dir)
{
int pixel_offset;
struct box *box;
int dx, dy;
size_t idx = 0;
box = box_pick_text_box(html, x, y, dir, &dx, &dy);
if (box) {
plot_font_style_t fstyle;
font_plot_style_from_css(box->style, &fstyle);
nsfont.font_position_in_string(&fstyle, box->text, box->length,
dx, &idx, &pixel_offset);
idx += box->byte_offset;
}
return idx;
}
/**
* Handle mouse tracking (including drags) in an HTML content window.
*
* \param c content of type html
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
void html_mouse_track(struct content *c, struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
html_mouse_action(c, bw, mouse, x, y);
}
/** Helper for file gadgets to store their filename unencoded on the
* dom node associated with the gadget.
*
* \todo Get rid of this crap eventually
*/
static void html__image_coords_dom_user_data_handler(dom_node_operation operation,
dom_string *key, void *_data, struct dom_node *src,
struct dom_node *dst)
{
struct image_input_coords *oldcoords, *coords = _data, *newcoords;
if (!dom_string_isequal(corestring_dom___ns_key_image_coords_node_data,
key) || coords == NULL) {
return;
}
switch (operation) {
case DOM_NODE_CLONED:
newcoords = calloc(1, sizeof(*newcoords));
*newcoords = *coords;
if (dom_node_set_user_data(dst,
corestring_dom___ns_key_image_coords_node_data,
newcoords, html__image_coords_dom_user_data_handler,
&oldcoords) == DOM_NO_ERR) {
free(oldcoords);
}
break;
case DOM_NODE_RENAMED:
case DOM_NODE_IMPORTED:
case DOM_NODE_ADOPTED:
break;
case DOM_NODE_DELETED:
free(coords);
break;
default:
LOG("User data operation not handled.");
assert(0);
}
}
/**
* Handle mouse clicks and movements in an HTML content window.
*
* \param c content of type html
* \param bw browser window
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*
* This function handles both hovering and clicking. It is important that the
* code path is identical (except that hovering doesn't carry out the action),
* so that the status bar reflects exactly what will happen. Having separate
* code paths opens the possibility that an attacker will make the status bar
* show some harmless action where clicking will be harmful.
*/
void html_mouse_action(struct content *c, struct browser_window *bw,
browser_mouse_state mouse, int x, int y)
{
html_content *html = (html_content *) c;
enum { ACTION_NONE, ACTION_SUBMIT, ACTION_GO } action = ACTION_NONE;
const char *title = 0;
nsurl *url = 0;
char *url_s = NULL;
size_t url_l = 0;
const char *target = 0;
char status_buffer[200];
const char *status = 0;
browser_pointer_shape pointer = BROWSER_POINTER_DEFAULT;
bool imagemap = false;
int box_x = 0, box_y = 0;
int gadget_box_x = 0, gadget_box_y = 0;
int html_object_pos_x = 0, html_object_pos_y = 0;
int text_box_x = 0;
struct box *url_box = 0;
struct box *gadget_box = 0;
struct box *text_box = 0;
struct box *box;
struct form_control *gadget = 0;
hlcache_handle *object = NULL;
struct box *html_object_box = NULL;
struct browser_window *iframe = NULL;
struct box *drag_candidate = NULL;
struct scrollbar *scrollbar = NULL;
plot_font_style_t fstyle;
int scroll_mouse_x = 0, scroll_mouse_y = 0;
int padding_left, padding_right, padding_top, padding_bottom;
browser_drag_type drag_type = browser_window_get_drag_type(bw);
union content_msg_data msg_data;
struct dom_node *node = NULL;
union html_drag_owner drag_owner;
union html_selection_owner sel_owner;
bool click = mouse & (BROWSER_MOUSE_PRESS_1 | BROWSER_MOUSE_PRESS_2 |
BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2 |
BROWSER_MOUSE_DRAG_1 | BROWSER_MOUSE_DRAG_2);
if (drag_type != DRAGGING_NONE && !mouse &&
html->visible_select_menu != NULL) {
/* drag end: select menu */
form_select_mouse_drag_end(html->visible_select_menu,
mouse, x, y);
}
if (html->visible_select_menu != NULL) {
box = html->visible_select_menu->box;
box_coords(box, &box_x, &box_y);
box_x -= box->border[LEFT].width;
box_y += box->height + box->border[BOTTOM].width +
box->padding[BOTTOM] + box->padding[TOP];
status = form_select_mouse_action(html->visible_select_menu,
mouse, x - box_x, y - box_y);
if (status != NULL) {
msg_data.explicit_status_text = status;
content_broadcast(c, CONTENT_MSG_STATUS, msg_data);
} else {
int width, height;
form_select_get_dimensions(html->visible_select_menu,
&width, &height);
html->visible_select_menu = NULL;
browser_window_redraw_rect(bw, box_x, box_y,
width, height);
}
return;
}
if (html->drag_type == HTML_DRAG_SELECTION) {
/* Selection drag */
struct box *box;
int dir = -1;
int dx, dy;
if (!mouse) {
/* End of selection drag */
int dir = -1;
size_t idx;
if (selection_dragging_start(&html->sel))
dir = 1;
idx = html_selection_drag_end(html, mouse, x, y, dir);
if (idx != 0)
selection_track(&html->sel, mouse, idx);
drag_owner.no_owner = true;
html_set_drag_type(html, HTML_DRAG_NONE,
drag_owner, NULL);
return;
}
if (selection_dragging_start(&html->sel))
dir = 1;
box = box_pick_text_box(html, x, y, dir, &dx, &dy);
if (box != NULL) {
int pixel_offset;
size_t idx;
plot_font_style_t fstyle;
font_plot_style_from_css(box->style, &fstyle);
nsfont.font_position_in_string(&fstyle,
box->text, box->length,
dx, &idx, &pixel_offset);
selection_track(&html->sel, mouse,
box->byte_offset + idx);
}
return;
}
if (html->drag_type == HTML_DRAG_SCROLLBAR) {
struct scrollbar *scr = html->drag_owner.scrollbar;
struct html_scrollbar_data *data = scrollbar_get_data(scr);
if (!mouse) {
/* drag end: scrollbar */
html_overflow_scroll_drag_end(scr, mouse, x, y);
}
box = data->box;
box_coords(box, &box_x, &box_y);
if (scrollbar_is_horizontal(scr)) {
scroll_mouse_x = x - box_x ;
scroll_mouse_y = y - (box_y + box->padding[TOP] +
box->height + box->padding[BOTTOM] -
SCROLLBAR_WIDTH);
status = scrollbar_mouse_status_to_message(
scrollbar_mouse_action(scr, mouse,
scroll_mouse_x,
scroll_mouse_y));
} else {
scroll_mouse_x = x - (box_x + box->padding[LEFT] +
box->width + box->padding[RIGHT] -
SCROLLBAR_WIDTH);
scroll_mouse_y = y - box_y;
status = scrollbar_mouse_status_to_message(
scrollbar_mouse_action(scr, mouse,
scroll_mouse_x,
scroll_mouse_y));
}
msg_data.explicit_status_text = status;
content_broadcast(c, CONTENT_MSG_STATUS, msg_data);
return;
}
if (html->drag_type == HTML_DRAG_TEXTAREA_SELECTION ||
html->drag_type == HTML_DRAG_TEXTAREA_SCROLLBAR) {
box = html->drag_owner.textarea;
assert(box->gadget != NULL);
assert(box->gadget->type == GADGET_TEXTAREA ||
box->gadget->type == GADGET_PASSWORD ||
box->gadget->type == GADGET_TEXTBOX);
box_coords(box, &box_x, &box_y);
textarea_mouse_action(box->gadget->data.text.ta, mouse,
x - box_x, y - box_y);
/* TODO: Set appropriate statusbar message */
return;
}
if (html->drag_type == HTML_DRAG_CONTENT_SELECTION ||
html->drag_type == HTML_DRAG_CONTENT_SCROLL) {
box = html->drag_owner.content;
assert(box->object != NULL);
box_coords(box, &box_x, &box_y);
content_mouse_track(box->object, bw, mouse,
x - box_x, y - box_y);
return;
}
if (html->drag_type == HTML_DRAG_CONTENT_SELECTION) {
box = html->drag_owner.content;
assert(box->object != NULL);
box_coords(box, &box_x, &box_y);
content_mouse_track(box->object, bw, mouse,
x - box_x, y - box_y);
return;
}
/* Content related drags handled by now */
assert(html->drag_type == HTML_DRAG_NONE);
/* search the box tree for a link, imagemap, form control, or
* box with scrollbars
*/
box = html->layout;
/* Consider the margins of the html page now */
box_x = box->margin[LEFT];
box_y = box->margin[TOP];
/* descend through visible boxes setting more specific values for:
* box - deepest box at point
* html_object_box - html object
* html_object_pos_x - html object
* html_object_pos_y - html object
* object - non html object
* iframe - iframe
* url - href or imagemap
* target - href or imagemap or gadget
* url_box - href or imagemap
* imagemap - imagemap
* gadget - gadget
* gadget_box - gadget
* gadget_box_x - gadget
* gadget_box_y - gadget
* title - title
* pointer
*
* drag_candidate - first box with scroll
* padding_left - box with scroll
* padding_right
* padding_top
* padding_bottom
* scrollbar - inside padding box stops decent
* scroll_mouse_x - inside padding box stops decent
* scroll_mouse_y - inside padding box stops decent
*
* text_box - text box
* text_box_x - text_box
*/
do {
if ((box->style != NULL) &&
(css_computed_visibility(box->style) ==
CSS_VISIBILITY_HIDDEN)) {
continue;
}
if (box->node != NULL) {
node = box->node;
}
if (box->object) {
if (content_get_type(box->object) == CONTENT_HTML) {
html_object_box = box;
html_object_pos_x = box_x;
html_object_pos_y = box_y;
} else {
object = box->object;
}
}
if (box->iframe) {
iframe = box->iframe;
}
if (box->href) {
url = box->href;
target = box->target;
url_box = box;
}
if (box->usemap) {
url = imagemap_get(html, box->usemap,
box_x, box_y, x, y, &target);
if (url) {
imagemap = true;
url_box = box;
}
}
if (box->gadget) {
gadget = box->gadget;
gadget_box = box;
gadget_box_x = box_x;
gadget_box_y = box_y;
if (gadget->form)
target = gadget->form->target;
}
if (box->title) {
title = box->title;
}
pointer = get_pointer_shape(box, false);
if ((box->scroll_x != NULL) ||
(box->scroll_y != NULL)) {
if (drag_candidate == NULL) {
drag_candidate = box;
}
padding_left = box_x +
scrollbar_get_offset(box->scroll_x);
padding_right = padding_left + box->padding[LEFT] +
box->width + box->padding[RIGHT];
padding_top = box_y +
scrollbar_get_offset(box->scroll_y);
padding_bottom = padding_top + box->padding[TOP] +
box->height + box->padding[BOTTOM];
if ((x > padding_left) &&
(x < padding_right) &&
(y > padding_top) &&
(y < padding_bottom)) {
/* mouse inside padding box */
if ((box->scroll_y != NULL) &&
(x > (padding_right -
SCROLLBAR_WIDTH))) {
/* mouse above vertical box scroll */
scrollbar = box->scroll_y;
scroll_mouse_x = x - (padding_right -
SCROLLBAR_WIDTH);
scroll_mouse_y = y - padding_top;
break;
} else if ((box->scroll_x != NULL) &&
(y > (padding_bottom -
SCROLLBAR_WIDTH))) {
/* mouse above horizontal box scroll */
scrollbar = box->scroll_x;
scroll_mouse_x = x - padding_left;
scroll_mouse_y = y - (padding_bottom -
SCROLLBAR_WIDTH);
break;
}
}
}
if (box->text && !box->object) {
text_box = box;
text_box_x = box_x;
}
} while ((box = box_at_point(box, x, y, &box_x, &box_y)) != NULL);
/* use of box_x, box_y, or content below this point is probably a
* mistake; they will refer to the last box returned by box_at_point */
assert(node != NULL);
if (scrollbar) {
status = scrollbar_mouse_status_to_message(
scrollbar_mouse_action(scrollbar, mouse,
scroll_mouse_x,
scroll_mouse_y));
pointer = BROWSER_POINTER_DEFAULT;
} else if (gadget) {
textarea_mouse_status ta_status;
switch (gadget->type) {
case GADGET_SELECT:
status = messages_get("FormSelect");
pointer = BROWSER_POINTER_MENU;
if (mouse & BROWSER_MOUSE_CLICK_1 &&
nsoption_bool(core_select_menu)) {
html->visible_select_menu = gadget;
form_open_select_menu(c, gadget,
form_select_menu_callback,
c);
pointer = BROWSER_POINTER_DEFAULT;
} else if (mouse & BROWSER_MOUSE_CLICK_1) {
msg_data.select_menu.gadget = gadget;
content_broadcast(c, CONTENT_MSG_SELECTMENU,
msg_data);
}
break;
case GADGET_CHECKBOX:
status = messages_get("FormCheckbox");
if (mouse & BROWSER_MOUSE_CLICK_1) {
gadget->selected = !gadget->selected;
dom_html_input_element_set_checked(
(dom_html_input_element *)(gadget->node),
gadget->selected);
html__redraw_a_box(html, gadget_box);
}
break;
case GADGET_RADIO:
status = messages_get("FormRadio");
if (mouse & BROWSER_MOUSE_CLICK_1)
form_radio_set(gadget);
break;
case GADGET_IMAGE:
if (mouse & BROWSER_MOUSE_CLICK_1) {
struct image_input_coords *coords, *oldcoords;
/** \todo Find a way to not ignore errors */
coords = calloc(1, sizeof(*coords));
if (coords == NULL) {
return;
}
coords->x = x - gadget_box_x;
coords->y = y - gadget_box_y;
if (dom_node_set_user_data(
gadget->node,
corestring_dom___ns_key_image_coords_node_data,
coords, html__image_coords_dom_user_data_handler,
&oldcoords) != DOM_NO_ERR)
return;
free(oldcoords);
}
/* drop through */
case GADGET_SUBMIT:
if (gadget->form) {
snprintf(status_buffer, sizeof status_buffer,
messages_get("FormSubmit"),
gadget->form->action);
status = status_buffer;
pointer = get_pointer_shape(gadget_box, false);
if (mouse & (BROWSER_MOUSE_CLICK_1 |
BROWSER_MOUSE_CLICK_2))
action = ACTION_SUBMIT;
} else {
status = messages_get("FormBadSubmit");
}
break;
case GADGET_TEXTBOX:
case GADGET_PASSWORD:
case GADGET_TEXTAREA:
if (gadget->type == GADGET_TEXTAREA)
status = messages_get("FormTextarea");
else
status = messages_get("FormTextbox");
if (click && (html->selection_type !=
HTML_SELECTION_TEXTAREA ||
html->selection_owner.textarea !=
gadget_box)) {
sel_owner.none = true;
html_set_selection(html, HTML_SELECTION_NONE,
sel_owner, true);
}
ta_status = textarea_mouse_action(gadget->data.text.ta,
mouse, x - gadget_box_x,
y - gadget_box_y);
if (ta_status & TEXTAREA_MOUSE_EDITOR) {
pointer = get_pointer_shape(gadget_box, false);
} else {
pointer = BROWSER_POINTER_DEFAULT;
status = scrollbar_mouse_status_to_message(
ta_status >> 3);
}
break;
case GADGET_HIDDEN:
/* not possible: no box generated */
break;
case GADGET_RESET:
status = messages_get("FormReset");
break;
case GADGET_FILE:
status = messages_get("FormFile");
if (mouse & BROWSER_MOUSE_CLICK_1) {
msg_data.gadget_click.gadget = gadget;
content_broadcast(c, CONTENT_MSG_GADGETCLICK, msg_data);
}
break;
case GADGET_BUTTON:
/* This gadget cannot be activated */
status = messages_get("FormButton");
break;
}
} else if (object && (mouse & BROWSER_MOUSE_MOD_2)) {
if (mouse & BROWSER_MOUSE_DRAG_2) {
msg_data.dragsave.type = CONTENT_SAVE_NATIVE;
msg_data.dragsave.content = object;
content_broadcast(c, CONTENT_MSG_DRAGSAVE, msg_data);
} else if (mouse & BROWSER_MOUSE_DRAG_1) {
msg_data.dragsave.type = CONTENT_SAVE_ORIG;
msg_data.dragsave.content = object;
content_broadcast(c, CONTENT_MSG_DRAGSAVE, msg_data);
}
/* \todo should have a drag-saving object msg */
} else if (iframe) {
int pos_x, pos_y;
float scale = browser_window_get_scale(bw);
browser_window_get_position(iframe, false, &pos_x, &pos_y);
pos_x /= scale;
pos_y /= scale;
if (mouse & BROWSER_MOUSE_CLICK_1 ||
mouse & BROWSER_MOUSE_CLICK_2) {
browser_window_mouse_click(iframe, mouse,
x - pos_x, y - pos_y);
} else {
browser_window_mouse_track(iframe, mouse,
x - pos_x, y - pos_y);
}
} else if (html_object_box) {
if (click && (html->selection_type != HTML_SELECTION_CONTENT ||
html->selection_owner.content !=
html_object_box)) {
sel_owner.none = true;
html_set_selection(html, HTML_SELECTION_NONE,
sel_owner, true);
}
if (mouse & BROWSER_MOUSE_CLICK_1 ||
mouse & BROWSER_MOUSE_CLICK_2) {
content_mouse_action(html_object_box->object,
bw, mouse,
x - html_object_pos_x,
y - html_object_pos_y);
} else {
content_mouse_track(html_object_box->object,
bw, mouse,
x - html_object_pos_x,
y - html_object_pos_y);
}
} else if (url) {
if (nsoption_bool(display_decoded_idn) == true) {
if (nsurl_get_utf8(url, &url_s, &url_l) != NSERROR_OK) {
/* Unable to obtain a decoded IDN. This is not a fatal error.
* Ensure the string pointer is NULL so we use the encoded version. */
url_s = NULL;
}
}
if (title) {
snprintf(status_buffer, sizeof status_buffer, "%s: %s",
url_s ? url_s : nsurl_access(url), title);
} else {
snprintf(status_buffer, sizeof status_buffer, "%s",
url_s ? url_s : nsurl_access(url));
}
status = status_buffer;
if (url_s != NULL)
free(url_s);
pointer = get_pointer_shape(url_box, imagemap);
if (mouse & BROWSER_MOUSE_CLICK_1 &&
mouse & BROWSER_MOUSE_MOD_1) {
/* force download of link */
browser_window_navigate(bw,
url,
content_get_url(c),
BW_NAVIGATE_DOWNLOAD,
NULL,
NULL,
NULL);
} else if (mouse & BROWSER_MOUSE_CLICK_2 &&
mouse & BROWSER_MOUSE_MOD_1) {
msg_data.savelink.url = url;
msg_data.savelink.title = title;
content_broadcast(c, CONTENT_MSG_SAVELINK, msg_data);
} else if (mouse & (BROWSER_MOUSE_CLICK_1 |
BROWSER_MOUSE_CLICK_2))
action = ACTION_GO;
} else {
bool done = false;
/* frame resizing */
if (browser_window_frame_resize_start(bw, mouse, x, y,
&pointer)) {
if (mouse & (BROWSER_MOUSE_DRAG_1 |
BROWSER_MOUSE_DRAG_2)) {
status = messages_get("FrameDrag");
}
done = true;
}
/* if clicking in the main page, remove the selection from any
* text areas */
if (!done) {
if (click && html->focus_type != HTML_FOCUS_SELF) {
union html_focus_owner fo;
fo.self = true;
html_set_focus(html, HTML_FOCUS_SELF, fo,
true, 0, 0, 0, NULL);
}
if (click && html->selection_type !=
HTML_SELECTION_SELF) {
sel_owner.none = true;
html_set_selection(html, HTML_SELECTION_NONE,
sel_owner, true);
}
if (text_box) {
int pixel_offset;
size_t idx;
font_plot_style_from_css(text_box->style,
&fstyle);
nsfont.font_position_in_string(&fstyle,
text_box->text,
text_box->length,
x - text_box_x,
&idx,
&pixel_offset);
if (selection_click(&html->sel, mouse,
text_box->byte_offset + idx)) {
/* key presses must be directed at the
* main browser window, paste text
* operations ignored */
html_drag_type drag_type;
union html_drag_owner drag_owner;
if (selection_dragging(&html->sel)) {
drag_type = HTML_DRAG_SELECTION;
drag_owner.no_owner = true;
html_set_drag_type(html,
drag_type,
drag_owner,
NULL);
status = messages_get(
"Selecting");
}
done = true;
}
} else if (mouse & BROWSER_MOUSE_PRESS_1) {
sel_owner.none = true;
selection_clear(&html->sel, true);
}
if (selection_defined(&html->sel)) {
sel_owner.none = false;
html_set_selection(html, HTML_SELECTION_SELF,
sel_owner, true);
} else if (click && html->selection_type !=
HTML_SELECTION_NONE) {
sel_owner.none = true;
html_set_selection(html, HTML_SELECTION_NONE,
sel_owner, true);
}
}
if (!done) {
if (title)
status = title;
if (mouse & BROWSER_MOUSE_DRAG_1) {
if (mouse & BROWSER_MOUSE_MOD_2) {
msg_data.dragsave.type =
CONTENT_SAVE_COMPLETE;
msg_data.dragsave.content = NULL;
content_broadcast(c,
CONTENT_MSG_DRAGSAVE,
msg_data);
} else {
if (drag_candidate == NULL) {
browser_window_page_drag_start(
bw, x, y);
} else {
html_box_drag_start(
drag_candidate,
x, y);
}
pointer = BROWSER_POINTER_MOVE;
}
}
else if (mouse & BROWSER_MOUSE_DRAG_2) {
if (mouse & BROWSER_MOUSE_MOD_2) {
msg_data.dragsave.type =
CONTENT_SAVE_SOURCE;
msg_data.dragsave.content = NULL;
content_broadcast(c,
CONTENT_MSG_DRAGSAVE,
msg_data);
} else {
if (drag_candidate == NULL) {
browser_window_page_drag_start(
bw, x, y);
} else {
html_box_drag_start(
drag_candidate,
x, y);
}
pointer = BROWSER_POINTER_MOVE;
}
}
}
if (mouse && mouse < BROWSER_MOUSE_MOD_1) {
/* ensure key presses still act on the browser window */
union html_focus_owner fo;
fo.self = true;
html_set_focus(html, HTML_FOCUS_SELF, fo,
true, 0, 0, 0, NULL);
}
}
if (!iframe && !html_object_box) {
msg_data.explicit_status_text = status;
content_broadcast(c, CONTENT_MSG_STATUS, msg_data);
msg_data.pointer = pointer;
content_broadcast(c, CONTENT_MSG_POINTER, msg_data);
}
/* fire dom click event */
if (mouse & BROWSER_MOUSE_CLICK_1) {
fire_dom_event(corestring_dom_click, node, true, true);
}
/* deferred actions that can cause this browser_window to be destroyed
* and must therefore be done after set_status/pointer
*/
switch (action) {
case ACTION_SUBMIT:
form_submit(content_get_url(c),
browser_window_find_target(bw, target, mouse),
gadget->form, gadget);
break;
case ACTION_GO:
browser_window_navigate(browser_window_find_target(bw, target, mouse),
url,
content_get_url(c),
BW_NAVIGATE_HISTORY,
NULL,
NULL,
NULL);
break;
case ACTION_NONE:
break;
}
}
/**
* Handle keypresses.
*
* \param c content of type HTML
* \param key The UCS4 character codepoint
* \return true if key handled, false otherwise
*/
bool html_keypress(struct content *c, uint32_t key)
{
html_content *html = (html_content *) c;
struct selection *sel = &html->sel;
struct box *box;
switch (html->focus_type) {
case HTML_FOCUS_CONTENT:
box = html->focus_owner.content;
return content_keypress(box->object, key);
case HTML_FOCUS_TEXTAREA:
box = html->focus_owner.textarea;
return box_textarea_keypress(html, box, key);
default:
/* Deal with it below */
break;
}
switch (key) {
case NS_KEY_COPY_SELECTION:
selection_copy_to_clipboard(sel);
return true;
case NS_KEY_CLEAR_SELECTION:
selection_clear(sel, true);
return true;
case NS_KEY_SELECT_ALL:
selection_select_all(sel);
return true;
case NS_KEY_ESCAPE:
if (selection_defined(sel)) {
selection_clear(sel, true);
return true;
}
/* if there's no selection, leave Escape for the caller */
return false;
}
return false;
}
/**
* Handle search.
*
* \param c content of type HTML
* \param context front end private data
* \param flags search flags
* \param string search string
*/
void html_search(struct content *c, void *context,
search_flags_t flags, const char *string)
{
html_content *html = (html_content *)c;
assert(c != NULL);
if (string != NULL && html->search_string != NULL &&
strcmp(string, html->search_string) == 0 &&
html->search != NULL) {
/* Continue prev. search */
search_step(html->search, flags, string);
} else if (string != NULL) {
/* New search */
free(html->search_string);
html->search_string = strdup(string);
if (html->search_string == NULL)
return;
if (html->search != NULL) {
search_destroy_context(html->search);
html->search = NULL;
}
html->search = search_create_context(c, CONTENT_HTML, context);
if (html->search == NULL)
return;
search_step(html->search, flags, string);
} else {
/* Clear search */
html_search_clear(c);
free(html->search_string);
html->search_string = NULL;
}
}
/**
* Terminate a search.
*
* \param c content of type HTML
*/
void html_search_clear(struct content *c)
{
html_content *html = (html_content *)c;
assert(c != NULL);
free(html->search_string);
html->search_string = NULL;
if (html->search != NULL) {
search_destroy_context(html->search);
}
html->search = NULL;
}
/**
* Callback for in-page scrollbars.
*/
void html_overflow_scroll_callback(void *client_data,
struct scrollbar_msg_data *scrollbar_data)
{
struct html_scrollbar_data *data = client_data;
html_content *html = (html_content *)data->c;
struct box *box = data->box;
union content_msg_data msg_data;
html_drag_type drag_type;
union html_drag_owner drag_owner;
switch(scrollbar_data->msg) {
case SCROLLBAR_MSG_MOVED:
if (html->reflowing == true) {
/* Can't redraw during layout, and it will
* be redrawn after layout anyway. */
break;
}
html__redraw_a_box(html, box);
break;
case SCROLLBAR_MSG_SCROLL_START:
{
struct rect rect = {
.x0 = scrollbar_data->x0,
.y0 = scrollbar_data->y0,
.x1 = scrollbar_data->x1,
.y1 = scrollbar_data->y1
};
drag_type = HTML_DRAG_SCROLLBAR;
drag_owner.scrollbar = scrollbar_data->scrollbar;
html_set_drag_type(html, drag_type, drag_owner, &rect);
}
break;
case SCROLLBAR_MSG_SCROLL_FINISHED:
drag_type = HTML_DRAG_NONE;
drag_owner.no_owner = true;
html_set_drag_type(html, drag_type, drag_owner, NULL);
msg_data.pointer = BROWSER_POINTER_AUTO;
content_broadcast(data->c, CONTENT_MSG_POINTER, msg_data);
break;
}
}
/**
* End overflow scroll scrollbar drags
*
* \param scrollbar scrollbar widget
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
void html_overflow_scroll_drag_end(struct scrollbar *scrollbar,
browser_mouse_state mouse, int x, int y)
{
int scroll_mouse_x, scroll_mouse_y, box_x, box_y;
struct html_scrollbar_data *data = scrollbar_get_data(scrollbar);
struct box *box;
box = data->box;
box_coords(box, &box_x, &box_y);
if (scrollbar_is_horizontal(scrollbar)) {
scroll_mouse_x = x - box_x;
scroll_mouse_y = y - (box_y + box->padding[TOP] +
box->height + box->padding[BOTTOM] -
SCROLLBAR_WIDTH);
scrollbar_mouse_drag_end(scrollbar, mouse,
scroll_mouse_x, scroll_mouse_y);
} else {
scroll_mouse_x = x - (box_x + box->padding[LEFT] +
box->width + box->padding[RIGHT] -
SCROLLBAR_WIDTH);
scroll_mouse_y = y - box_y;
scrollbar_mouse_drag_end(scrollbar, mouse,
scroll_mouse_x, scroll_mouse_y);
}
}
/* Documented in html_internal.h */
void html_set_drag_type(html_content *html, html_drag_type drag_type,
union html_drag_owner drag_owner, const struct rect *rect)
{
union content_msg_data msg_data;
assert(html != NULL);
html->drag_type = drag_type;
html->drag_owner = drag_owner;
switch (drag_type) {
case HTML_DRAG_NONE:
assert(drag_owner.no_owner == true);
msg_data.drag.type = CONTENT_DRAG_NONE;
break;
case HTML_DRAG_SCROLLBAR:
case HTML_DRAG_TEXTAREA_SCROLLBAR:
case HTML_DRAG_CONTENT_SCROLL:
msg_data.drag.type = CONTENT_DRAG_SCROLL;
break;
case HTML_DRAG_SELECTION:
assert(drag_owner.no_owner == true);
/* Fall through */
case HTML_DRAG_TEXTAREA_SELECTION:
case HTML_DRAG_CONTENT_SELECTION:
msg_data.drag.type = CONTENT_DRAG_SELECTION;
break;
}
msg_data.drag.rect = rect;
/* Inform of the content's drag status change */
content_broadcast((struct content *)html, CONTENT_MSG_DRAG, msg_data);
}
/* Documented in html_internal.h */
void html_set_focus(html_content *html, html_focus_type focus_type,
union html_focus_owner focus_owner, bool hide_caret,
int x, int y, int height, const struct rect *clip)
{
union content_msg_data msg_data;
int x_off = 0;
int y_off = 0;
struct rect cr;
bool textarea_lost_focus = html->focus_type == HTML_FOCUS_TEXTAREA &&
focus_type != HTML_FOCUS_TEXTAREA;
assert(html != NULL);
switch (focus_type) {
case HTML_FOCUS_SELF:
assert(focus_owner.self == true);
if (html->focus_type == HTML_FOCUS_SELF)
/* Don't need to tell anyone anything */
return;
break;
case HTML_FOCUS_CONTENT:
box_coords(focus_owner.content, &x_off, &y_off);
break;
case HTML_FOCUS_TEXTAREA:
box_coords(focus_owner.textarea, &x_off, &y_off);
break;
}
html->focus_type = focus_type;
html->focus_owner = focus_owner;
if (textarea_lost_focus) {
msg_data.caret.type = CONTENT_CARET_REMOVE;
} else if (focus_type != HTML_FOCUS_SELF && hide_caret) {
msg_data.caret.type = CONTENT_CARET_HIDE;
} else {
if (clip != NULL) {
cr = *clip;
cr.x0 += x_off;
cr.y0 += y_off;
cr.x1 += x_off;
cr.y1 += y_off;
}
msg_data.caret.type = CONTENT_CARET_SET_POS;
msg_data.caret.pos.x = x + x_off;
msg_data.caret.pos.y = y + y_off;
msg_data.caret.pos.height = height;
msg_data.caret.pos.clip = (clip == NULL) ? NULL : &cr;
}
/* Inform of the content's drag status change */
content_broadcast((struct content *)html, CONTENT_MSG_CARET, msg_data);
}
/* Documented in html_internal.h */
void html_set_selection(html_content *html, html_selection_type selection_type,
union html_selection_owner selection_owner, bool read_only)
{
union content_msg_data msg_data;
struct box *box;
bool changed = false;
bool same_type = html->selection_type == selection_type;
assert(html != NULL);
if ((selection_type == HTML_SELECTION_NONE &&
html->selection_type != HTML_SELECTION_NONE) ||
(selection_type != HTML_SELECTION_NONE &&
html->selection_type == HTML_SELECTION_NONE))
/* Existance of selection has changed, and we'll need to
* inform our owner */
changed = true;
/* Clear any existing selection */
if (html->selection_type != HTML_SELECTION_NONE) {
switch (html->selection_type) {
case HTML_SELECTION_SELF:
if (same_type)
break;
selection_clear(&html->sel, true);
break;
case HTML_SELECTION_TEXTAREA:
if (same_type && html->selection_owner.textarea ==
selection_owner.textarea)
break;
box = html->selection_owner.textarea;
textarea_clear_selection(box->gadget->data.text.ta);
break;
case HTML_SELECTION_CONTENT:
if (same_type && html->selection_owner.content ==
selection_owner.content)
break;
box = html->selection_owner.content;
content_clear_selection(box->object);
break;
default:
break;
}
}
html->selection_type = selection_type;
html->selection_owner = selection_owner;
if (!changed)
/* Don't need to report lack of change to owner */
return;
/* Prepare msg */
switch (selection_type) {
case HTML_SELECTION_NONE:
assert(selection_owner.none == true);
msg_data.selection.selection = false;
break;
case HTML_SELECTION_SELF:
assert(selection_owner.none == false);
/* fall through */
case HTML_SELECTION_TEXTAREA:
case HTML_SELECTION_CONTENT:
msg_data.selection.selection = true;
break;
default:
break;
}
msg_data.selection.read_only = read_only;
/* Inform of the content's selection status change */
content_broadcast((struct content *)html, CONTENT_MSG_SELECTION,
msg_data);
}
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