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netsurf/content/handlers/html/interaction.c
Vincent Sanders ebe1b05114 improve desktop text search header usage 
remove unecessary inclusion of desktop search header in content
  header which has knock on effect of not having ctype or string
  system headers dragged in unecessarily.

Futher this highlighted use of ctype API where internal ascii
  processing ought to be used.
2020-06-24 23:49:59 +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
* implementation of user interaction with a CONTENT_HTML.
*/
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <dom/dom.h>
#include "utils/corestrings.h"
#include "utils/messages.h"
#include "utils/utils.h"
#include "utils/log.h"
#include "utils/nsoption.h"
#include "netsurf/content.h"
#include "netsurf/browser_window.h"
#include "netsurf/mouse.h"
#include "netsurf/misc.h"
#include "netsurf/layout.h"
#include "netsurf/keypress.h"
#include "content/hlcache.h"
#include "content/textsearch.h"
#include "desktop/frames.h"
#include "desktop/scrollbar.h"
#include "desktop/selection.h"
#include "desktop/textarea.h"
#include "javascript/js.h"
#include "desktop/gui_internal.h"
#include "html/box.h"
#include "html/box_textarea.h"
#include "html/box_inspect.h"
#include "html/font.h"
#include "html/form_internal.h"
#include "html/private.h"
#include "html/imagemap.h"
#include "html/interaction.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(&html->len_ctx, box->style, &fstyle);
guit->layout->position(&fstyle, box->text, box->length,
dx, &idx, &pixel_offset);
idx += box->byte_offset;
}
return idx;
}
/**
* Helper for file gadgets to store their filename.
*
* Stores the filename unencoded on the dom node associated with the
* gadget.
*
* \todo Get rid of this crap eventually
*
* \param operation DOM operation
* \param key DOM node key being considerd
* \param _data The data assocated with the key
* \param src The source DOM node.
* \param dst The destination DOM node.
*/
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));
if (newcoords != NULL) {
*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_DELETED:
free(coords);
break;
case DOM_NODE_RENAMED:
case DOM_NODE_IMPORTED:
case DOM_NODE_ADOPTED:
break;
default:
NSLOG(netsurf, INFO, "User data operation not handled.");
assert(0);
}
}
/**
* 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
*/
static 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);
}
}
/**
* handle html mouse action when select menu is open
*
*/
static nserror
mouse_action_select_menu(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
struct box *box;
int box_x = 0;
int box_y = 0;
const char *status;
int width, height;
struct hlcache_handle *bw_content;
browser_drag_type bw_drag_type;
assert(html->visible_select_menu != NULL);
bw_drag_type = browser_window_get_drag_type(bw);
if (bw_drag_type != DRAGGING_NONE && !mouse) {
/* drag end: select menu */
form_select_mouse_drag_end(html->visible_select_menu, mouse, x, y);
}
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) {
/* set status if menu still open */
union content_msg_data msg_data;
msg_data.explicit_status_text = status;
content_broadcast((struct content *)html,
CONTENT_MSG_STATUS,
&msg_data);
return NSERROR_OK;
}
/* close menu and redraw where it was */
form_select_get_dimensions(html->visible_select_menu, &width, &height);
html->visible_select_menu = NULL;
bw_content = browser_window_get_content(bw);
content_request_redraw(bw_content,
box_x,
box_y,
width,
height);
return NSERROR_OK;
}
/**
* handle html mouse action when a selection drag is being performed
*
*/
static nserror
mouse_action_drag_selection(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
struct box *box;
int dir = -1;
int dx, dy;
size_t idx;
union html_drag_owner drag_owner;
int pixel_offset;
plot_font_style_t fstyle;
if (!mouse) {
/* End of selection drag */
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 NSERROR_OK;
}
if (selection_dragging_start(html->sel)) {
dir = 1;
}
box = box_pick_text_box(html, x, y, dir, &dx, &dy);
if (box != NULL) {
font_plot_style_from_css(&html->len_ctx, box->style, &fstyle);
guit->layout->position(&fstyle,
box->text,
box->length,
dx,
&idx,
&pixel_offset);
selection_track(html->sel, mouse, box->byte_offset + idx);
}
return NSERROR_OK;
}
/**
* handle html mouse action when a scrollbar drag is being performed
*
*/
static nserror
mouse_action_drag_scrollbar(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
struct scrollbar *scr;
struct html_scrollbar_data *data;
struct box *box;
int box_x = 0;
int box_y = 0;
const char *status;
int scroll_mouse_x = 0, scroll_mouse_y = 0;
scrollbar_mouse_status scrollbar_status;
scr = html->drag_owner.scrollbar;
if (!mouse) {
/* drag end: scrollbar */
html_overflow_scroll_drag_end(scr, mouse, x, y);
}
data = scrollbar_get_data(scr);
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);
scrollbar_status = 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;
scrollbar_status = scrollbar_mouse_action(scr,
mouse,
scroll_mouse_x,
scroll_mouse_y);
}
status = scrollbar_mouse_status_to_message(scrollbar_status);
if (status != NULL) {
union content_msg_data msg_data;
msg_data.explicit_status_text = status;
content_broadcast((struct content *)html,
CONTENT_MSG_STATUS,
&msg_data);
}
return NSERROR_OK;
}
/**
* handle mouse actions while dragging in a text area
*/
static nserror
mouse_action_drag_textarea(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
struct box *box;
int box_x = 0;
int box_y = 0;
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 NSERROR_OK;
}
/**
* handle mouse actions while dragging in a content
*/
static nserror
mouse_action_drag_content(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
struct box *box;
int box_x = 0;
int box_y = 0;
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 NSERROR_OK;
}
/**
* local structure containing all the mouse action state information
*/
struct mouse_action_state {
struct {
const char *status; /**< status text */
browser_pointer_shape pointer; /**< pointer shape */
enum {
ACTION_NONE,
ACTION_NOSEND, /**< do not send status and pointer message */
ACTION_SUBMIT,
ACTION_GO,
ACTION_JS,
} action;
} result;
/** dom node */
struct dom_node *node;
/** html object */
struct {
struct box *box;
int pos_x;
int pos_y;
} html_object;
/** non html object */
hlcache_handle *object;
/** iframe */
struct browser_window *iframe;
/** link either from href or imagemap */
struct {
struct box *box;
nsurl *url;
const char *target;
bool is_imagemap;
} link;
/** gadget */
struct {
struct form_control *control;
struct box *box;
int box_x;
int box_y;
const char *target;
} gadget;
/** title */
const char *title;
/** candidate box for drag operation */
struct box *drag_candidate;
/** scrollbar */
struct {
struct scrollbar *bar;
int mouse_x;
int mouse_y;
} scroll;
/** text in box */
struct {
struct box *box;
int box_x;
} text;
};
/**
* iterate the box tree for deepest node at coordinates
*
* extracts mouse action node information by descending 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
*/
static nserror
get_mouse_action_node(html_content *html,
int x, int y,
struct mouse_action_state *man)
{
struct box *box;
int box_x = 0;
int box_y = 0;
/* initialise the mouse action state data */
memset(man, 0, sizeof(struct mouse_action_state));
man->node = html->layout->node; /* Default dom node to the <HTML> */
man->result.pointer = BROWSER_POINTER_DEFAULT;
/* 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];
do {
/* skip hidden boxes */
if ((box->style != NULL) &&
(css_computed_visibility(box->style) ==
CSS_VISIBILITY_HIDDEN)) {
goto next_box;
}
if (box->node != NULL) {
man->node = box->node;
}
if (box->object) {
if (content_get_type(box->object) == CONTENT_HTML) {
man->html_object.box = box;
man->html_object.pos_x = box_x;
man->html_object.pos_y = box_y;
} else {
man->object = box->object;
}
}
if (box->iframe) {
man->iframe = box->iframe;
}
if (box->href) {
man->link.url = box->href;
man->link.target = box->target;
man->link.box = box;
man->link.is_imagemap = false;
}
if (box->usemap) {
man->link.url = imagemap_get(html,
box->usemap,
box_x,
box_y,
x, y,
&man->link.target);
man->link.box = box;
man->link.is_imagemap = true;
}
if (box->gadget) {
man->gadget.control = box->gadget;
man->gadget.box = box;
man->gadget.box_x = box_x;
man->gadget.box_y = box_y;
if (box->gadget->form) {
man->gadget.target = box->gadget->form->target;
}
}
if (box->title) {
man->title = box->title;
}
man->result.pointer = get_pointer_shape(box, false);
if ((box->scroll_x != NULL) ||
(box->scroll_y != NULL)) {
int padding_left;
int padding_right;
int padding_top;
int padding_bottom;
if (man->drag_candidate == NULL) {
man->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 */
man->scroll.bar = box->scroll_y;
man->scroll.mouse_x = x - (padding_right - SCROLLBAR_WIDTH);
man->scroll.mouse_y = y - padding_top;
break;
} else if ((box->scroll_x != NULL) &&
(y > (padding_bottom -
SCROLLBAR_WIDTH))) {
/* mouse above horizontal box scroll */
man->scroll.bar = box->scroll_x;
man->scroll.mouse_x = x - padding_left;
man->scroll.mouse_y = y - (padding_bottom - SCROLLBAR_WIDTH);
break;
}
}
}
if (box->text && !box->object) {
man->text.box = box;
man->text.box_x = box_x;
}
next_box:
/* iterate to next box */
box = box_at_point(&html->len_ctx, box, x, y, &box_x, &box_y);
} while (box != 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(man->node != NULL);
return NSERROR_OK;
}
/**
* process mouse activity on a form gadget
*/
static nserror
gadget_mouse_action(html_content *html,
browser_mouse_state mouse,
int x, int y,
struct mouse_action_state *mas)
{
struct content *c = (struct content *)html;
textarea_mouse_status ta_status;
union content_msg_data msg_data;
nserror res;
bool click;
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);
switch (mas->gadget.control->type) {
case GADGET_SELECT:
mas->result.status = messages_get("FormSelect");
mas->result.pointer = BROWSER_POINTER_MENU;
if (mouse & BROWSER_MOUSE_CLICK_1 &&
nsoption_bool(core_select_menu)) {
html->visible_select_menu = mas->gadget.control;
res = form_open_select_menu(c,
mas->gadget.control,
form_select_menu_callback,
c);
if (res != NSERROR_OK) {
NSLOG(netsurf, ERROR, "%s",
messages_get_errorcode(res));
html->visible_select_menu = NULL;
}
mas->result.pointer = BROWSER_POINTER_DEFAULT;
} else if (mouse & BROWSER_MOUSE_CLICK_1) {
msg_data.select_menu.gadget = mas->gadget.control;
content_broadcast(c,
CONTENT_MSG_SELECTMENU,
&msg_data);
}
break;
case GADGET_CHECKBOX:
mas->result.status = messages_get("FormCheckbox");
if (mouse & BROWSER_MOUSE_CLICK_1) {
mas->gadget.control->selected = !mas->gadget.control->selected;
dom_html_input_element_set_checked(
(dom_html_input_element *)(mas->gadget.control->node),
mas->gadget.control->selected);
html__redraw_a_box(html, mas->gadget.box);
}
break;
case GADGET_RADIO:
mas->result.status = messages_get("FormRadio");
if (mouse & BROWSER_MOUSE_CLICK_1) {
form_radio_set(mas->gadget.control);
}
break;
case GADGET_IMAGE:
/* This falls through to SUBMIT */
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 NSERROR_OK;
}
coords->x = x - mas->gadget.box_x;
coords->y = y - mas->gadget.box_y;
if (dom_node_set_user_data(
mas->gadget.control->node,
corestring_dom___ns_key_image_coords_node_data,
coords,
html__image_coords_dom_user_data_handler,
&oldcoords) != DOM_NO_ERR) {
return NSERROR_OK;
}
free(oldcoords);
}
/* Fall through */
case GADGET_SUBMIT:
if (mas->gadget.control->form) {
static char status_buffer[200];
snprintf(status_buffer,
sizeof status_buffer,
messages_get("FormSubmit"),
mas->gadget.control->form->action);
mas->result.status = status_buffer;
mas->result.pointer = get_pointer_shape(mas->gadget.box,
false);
if (mouse & (BROWSER_MOUSE_CLICK_1 |
BROWSER_MOUSE_CLICK_2)) {
mas->result.action = ACTION_SUBMIT;
}
} else {
mas->result.status = messages_get("FormBadSubmit");
}
break;
case GADGET_TEXTBOX:
case GADGET_PASSWORD:
case GADGET_TEXTAREA:
if (mas->gadget.control->type == GADGET_TEXTAREA) {
mas->result.status = messages_get("FormTextarea");
} else {
mas->result.status = messages_get("FormTextbox");
}
if (click &&
(html->selection_type != HTML_SELECTION_TEXTAREA ||
html->selection_owner.textarea != mas->gadget.box)) {
union html_selection_owner sel_owner;
sel_owner.none = true;
html_set_selection(html,
HTML_SELECTION_NONE,
sel_owner,
true);
}
ta_status = textarea_mouse_action(mas->gadget.control->data.text.ta,
mouse,
x - mas->gadget.box_x,
y - mas->gadget.box_y);
if (ta_status & TEXTAREA_MOUSE_EDITOR) {
mas->result.pointer = get_pointer_shape(mas->gadget.box, false);
} else {
mas->result.pointer = BROWSER_POINTER_DEFAULT;
mas->result.status = scrollbar_mouse_status_to_message(ta_status >> 3);
}
break;
case GADGET_HIDDEN:
/* not possible: no box generated */
break;
case GADGET_RESET:
mas->result.status = messages_get("FormReset");
break;
case GADGET_FILE:
mas->result.status = messages_get("FormFile");
if (mouse & BROWSER_MOUSE_CLICK_1) {
msg_data.gadget_click.gadget = mas->gadget.control;
content_broadcast(c,
CONTENT_MSG_GADGETCLICK,
&msg_data);
}
break;
case GADGET_BUTTON:
/* This gadget cannot be activated */
mas->result.status = messages_get("FormButton");
break;
}
return NSERROR_OK;
}
/**
* process mouse activity on an iframe
*/
static nserror
iframe_mouse_action(struct browser_window *bw,
browser_mouse_state mouse,
int x, int y,
struct mouse_action_state *mas)
{
int pos_x, pos_y;
float scale;
scale = browser_window_get_scale(bw);
browser_window_get_position(mas->iframe, false, &pos_x, &pos_y);
if (mouse & BROWSER_MOUSE_CLICK_1 ||
mouse & BROWSER_MOUSE_CLICK_2) {
browser_window_mouse_click(mas->iframe,
mouse,
(x * scale) - pos_x,
(y * scale) - pos_y);
} else {
browser_window_mouse_track(mas->iframe,
mouse,
(x * scale) - pos_x,
(y * scale) - pos_y);
}
mas->result.action = ACTION_NOSEND;
return NSERROR_OK;
}
/**
* process mouse activity on an html object
*/
static nserror
html_object_mouse_action(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y,
struct mouse_action_state *mas)
{
bool click;
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 (click &&
(html->selection_type != HTML_SELECTION_CONTENT ||
html->selection_owner.content != mas->html_object.box)) {
union html_selection_owner sel_owner;
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(mas->html_object.box->object,
bw,
mouse,
x - mas->html_object.pos_x,
y - mas->html_object.pos_y);
} else {
content_mouse_track(mas->html_object.box->object,
bw,
mouse,
x - mas->html_object.pos_x,
y - mas->html_object.pos_y);
}
mas->result.action = ACTION_NOSEND;
return NSERROR_OK;
}
/**
* determine if a url has a javascript scheme
*
* \param urm The url to check.
* \return true if the url is a javascript scheme else false
*/
static bool is_javascript_navigate_url(nsurl *url)
{
bool is_js = false;
lwc_string *scheme;
scheme = nsurl_get_component(url, NSURL_SCHEME);
if (scheme != NULL) {
if (scheme == corestring_lwc_javascript) {
is_js = true;
}
lwc_string_unref(scheme);
}
return is_js;
}
/**
* process mouse activity on a link
*/
static nserror
link_mouse_action(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y,
struct mouse_action_state *mas)
{
nserror res;
char *url_s = NULL;
size_t url_l = 0;
static char status_buffer[200];
union content_msg_data msg_data;
if (nsoption_bool(display_decoded_idn) == true) {
res = nsurl_get_utf8(mas->link.url, &url_s, &url_l);
if (res != 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 (mas->title) {
snprintf(status_buffer,
sizeof status_buffer,
"%s: %s",
url_s ? url_s : nsurl_access(mas->link.url),
mas->title);
} else {
snprintf(status_buffer,
sizeof status_buffer,
"%s",
url_s ? url_s : nsurl_access(mas->link.url));
}
if (url_s != NULL) {
free(url_s);
}
mas->result.status = status_buffer;
mas->result.pointer = get_pointer_shape(mas->link.box,
mas->link.is_imagemap);
if (mouse & BROWSER_MOUSE_CLICK_1 &&
mouse & BROWSER_MOUSE_MOD_1) {
/* force download of link */
browser_window_navigate(bw,
mas->link.url,
content_get_url((struct content *)html),
BW_NAVIGATE_DOWNLOAD,
NULL,
NULL,
NULL);
} else if (mouse & BROWSER_MOUSE_CLICK_2 &&
mouse & BROWSER_MOUSE_MOD_1) {
msg_data.savelink.url = mas->link.url;
msg_data.savelink.title = mas->title;
content_broadcast((struct content *)html,
CONTENT_MSG_SAVELINK,
&msg_data);
} else if (mouse & (BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2)) {
if (is_javascript_navigate_url(mas->link.url)) {
mas->result.action = ACTION_JS;
} else {
mas->result.action = ACTION_GO;
}
}
return NSERROR_OK;
}
/**
* process mouse activity if it is not anything else
*/
static nserror
default_mouse_action(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y,
struct mouse_action_state *mas)
{
struct content *c = (struct content *)html;
bool done = false;
/* frame resizing */
if (browser_window_frame_resize_start(bw, mouse, x, y, &mas->result.pointer)) {
if (mouse & (BROWSER_MOUSE_DRAG_1 | BROWSER_MOUSE_DRAG_2)) {
mas->result.status = messages_get("FrameDrag");
}
done = true;
}
/* if clicking in the main page, remove the selection from any
* text areas */
if (!done) {
union html_selection_owner sel_owner;
bool click;
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 (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 (mas->text.box) {
int pixel_offset;
size_t idx;
plot_font_style_t fstyle;
font_plot_style_from_css(&html->len_ctx,
mas->text.box->style,
&fstyle);
guit->layout->position(&fstyle,
mas->text.box->text,
mas->text.box->length,
x - mas->text.box_x,
&idx,
&pixel_offset);
if (selection_click(html->sel,
html->bw,
mouse,
mas->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);
mas->result.status = messages_get("Selecting");
}
done = true;
}
} else if (mouse & BROWSER_MOUSE_PRESS_1) {
sel_owner.none = true;
selection_clear(html->sel, true);
}
if (selection_active(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) {
union content_msg_data msg_data;
if (mas->title) {
mas->result.status = mas->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 (mas->drag_candidate == NULL) {
browser_window_page_drag_start(bw,
x, y);
} else {
html_box_drag_start(mas->drag_candidate,
x, y);
}
mas->result.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 (mas->drag_candidate == NULL) {
browser_window_page_drag_start(bw,
x, y);
} else {
html_box_drag_start(mas->drag_candidate,
x, y);
}
mas->result.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);
}
return NSERROR_OK;
}
/**
* handle non dragging mouse actions
*/
static nserror
mouse_action_drag_none(html_content *html,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
nserror res;
struct content *c = (struct content *)html;
union content_msg_data msg_data;
lwc_string *path;
/**
* computed state
*
* not on heap to avoid allocation or stack because it is large
*/
static struct mouse_action_state mas;
res = get_mouse_action_node(html, x, y, &mas);
if (res != NSERROR_OK) {
return res;
}
if (mas.scroll.bar) {
mas.result.status = scrollbar_mouse_status_to_message(
scrollbar_mouse_action(mas.scroll.bar,
mouse,
mas.scroll.mouse_x,
mas.scroll.mouse_y));
mas.result.pointer = BROWSER_POINTER_DEFAULT;
} else if (mas.gadget.control) {
res = gadget_mouse_action(html, mouse, x, y, &mas);
} else if ((mas.object != NULL) && (mouse & BROWSER_MOUSE_MOD_2)) {
if (mouse & BROWSER_MOUSE_DRAG_2) {
msg_data.dragsave.type = CONTENT_SAVE_NATIVE;
msg_data.dragsave.content = mas.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 = mas.object;
content_broadcast(c, CONTENT_MSG_DRAGSAVE, &msg_data);
}
/* \todo should have a drag-saving object msg */
} else if (mas.iframe != NULL) {
res = iframe_mouse_action(bw, mouse, x, y, &mas);
} else if (mas.html_object.box != NULL) {
res = html_object_mouse_action(html, bw, mouse, x, y, &mas);
} else if (mas.link.url != NULL) {
res = link_mouse_action(html, bw, mouse, x, y, &mas);
} else {
res = default_mouse_action(html, bw, mouse, x, y, &mas);
}
if (res != NSERROR_OK) {
return res;
}
/* send status and pointer message */
if (mas.result.action != ACTION_NOSEND) {
msg_data.explicit_status_text = mas.result.status;
content_broadcast(c, CONTENT_MSG_STATUS, &msg_data);
msg_data.pointer = mas.result.pointer;
content_broadcast(c, CONTENT_MSG_POINTER, &msg_data);
}
/* fire dom click event */
if (mouse & BROWSER_MOUSE_CLICK_1) {
fire_generic_dom_event(corestring_dom_click, mas.node, true, true);
}
/* deferred actions that can cause this browser_window to be destroyed
* and must therefore be done after set_status/pointer
*/
switch (mas.result.action) {
case ACTION_SUBMIT:
res = form_submit(content_get_url(c),
browser_window_find_target(bw,
mas.gadget.target,
mouse),
mas.gadget.control->form,
mas.gadget.control);
break;
case ACTION_GO:
res = browser_window_navigate(
browser_window_find_target(bw,
mas.link.target,
mouse),
mas.link.url,
content_get_url(c),
BW_NAVIGATE_HISTORY,
NULL,
NULL,
NULL);
break;
case ACTION_JS:
path = nsurl_get_component(mas.link.url, NSURL_PATH);
if (path != NULL) {
html_exec(c,
lwc_string_data(path),
lwc_string_length(path));
lwc_string_unref(path);
}
break;
case ACTION_NOSEND:
case ACTION_NONE:
res = NSERROR_OK;
break;
}
return res;
}
/* exported interface documented in html/interaction.h */
nserror html_mouse_track(struct content *c,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
return html_mouse_action(c, bw, mouse, x, y);
}
/* exported interface documented in html/interaction.h */
nserror
html_mouse_action(struct content *c,
struct browser_window *bw,
browser_mouse_state mouse,
int x, int y)
{
html_content *html = (html_content *)c;
nserror res;
/* handle open select menu */
if (html->visible_select_menu != NULL) {
return mouse_action_select_menu(html, bw, mouse, x, y);
}
/* handle content drag */
switch (html->drag_type) {
case HTML_DRAG_SELECTION:
res = mouse_action_drag_selection(html, bw, mouse, x, y);
break;
case HTML_DRAG_SCROLLBAR:
res = mouse_action_drag_scrollbar(html, bw, mouse, x, y);
break;
case HTML_DRAG_TEXTAREA_SELECTION:
case HTML_DRAG_TEXTAREA_SCROLLBAR:
res = mouse_action_drag_textarea(html, bw, mouse, x, y);
break;
case HTML_DRAG_CONTENT_SELECTION:
case HTML_DRAG_CONTENT_SCROLL:
res = mouse_action_drag_content(html, bw, mouse, x, y);
break;
case HTML_DRAG_NONE:
res = mouse_action_drag_none(html, bw, mouse, x, y);
break;
default:
/* Unknown content related drag type */
assert(0 && "Unknown content related drag type");
}
if (res != NSERROR_OK) {
NSLOG(netsurf, ERROR, "%s", messages_get_errorcode(res));
}
return res;
}
/**
* 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;
/** \todo
* At the moment, the front end interface for keypress only gives
* us a UCS4 key value. This doesn't doesn't have all the information
* we need to fill out the event properly. We don't get to know about
* modifier keys, and things like CTRL+C are passed in as
* \ref NS_KEY_COPY_SELECTION, a magic value outside the valid Unicode
* range.
*
* We need to:
*
* 1. Update the front end interface so that both press and release
* events reach the core.
* 2. Stop encoding the special keys like \ref NS_KEY_COPY_SELECTION as
* magic values in the front ends, so we just get the events, e.g.:
* 1. Press ctrl
* 2. Press c
* 3. Release c
* 4. Release ctrl
* 3. Pass all the new info to the DOM KeyboardEvent events.
* 4. If there is a focused element, fire the event at that, instead of
* `html->layout->node`.
* 5. Rebuild the \ref NS_KEY_COPY_SELECTION values from the info we
* now get given, and use that for the code below this
* \ref fire_dom_keyboard_event call.
* 6. Move the code after this \ref fire_dom_keyboard_event call into
* the default action handler for DOM events.
*
* This will mean that if the JavaScript event listener does
* `event.preventDefault()` then we won't handle the event when
* we're not supposed to.
*/
if (html->layout != NULL && html->layout->node != NULL) {
fire_dom_keyboard_event(corestring_dom_keydown,
html->layout->node, true, true, key);
}
switch (html->focus_type) {
case HTML_FOCUS_CONTENT:
return content_keypress(html->focus_owner.content->object, key);
case HTML_FOCUS_TEXTAREA:
if (box_textarea_keypress(html, html->focus_owner.textarea, key) == NSERROR_OK) {
return true;
} else {
return false;
}
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 there's no selection, leave Escape for the caller */
return selection_clear(sel, true);
}
return false;
}
/**
* 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;
}
}
/* 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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