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netsurf/render/html_interaction.c
Vincent Sanders c105738fa3 Change LOG() macro to be varadic 
This changes the LOG macro to be varadic removing the need for all
callsites to have double bracketing and allows for future improvement
on how we use the logging macros.

The callsites were changed with coccinelle and the changes checked by
hand. Compile tested for several frontends but not all.

A formatting annotation has also been added which allows the compiler
to check the parameters and types passed to the logging.
2015-05-28 16:08:46 +01:00

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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;
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 *next_box;
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
*/
while ((next_box = box_at_point(box, x, y, &box_x, &box_y)) != NULL) {
box = next_box;
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;
}
}
/* 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 */
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 (title) {
snprintf(status_buffer, sizeof status_buffer, "%s: %s",
nsurl_access(url), title);
status = status_buffer;
} else
status = nsurl_access(url);
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) {
union html_selection_owner sel_owner;
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) ||
(mouse & BROWSER_MOUSE_CLICK_2)) {
js_fire_event(html->jscontext, "click", html->document, node);
}
/* 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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