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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 "content/content.h"
#include "desktop/browser.h"
#include "desktop/frames.h"
#include "desktop/mouse.h"
#include "desktop/options.h"
#include "desktop/scrollbar.h"
#include "desktop/selection.h"
#include "desktop/textinput.h"
#include "render/box.h"
#include "render/font.h"
#include "render/form.h"
#include "render/html_internal.h"
#include "render/imagemap.h"
#include "render/textinput.h"
#include "utils/messages.h"
#include "utils/utils.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 h html content's high level cache entry
* \param mouse state of mouse buttons and modifier keys
* \param x coordinate of mouse
* \param y coordinate of mouse
*/
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_content *html = (html_content*) c;
browser_drag_type drag_type = browser_window_get_drag_type(bw);
if (drag_type == DRAGGING_SELECTION && !mouse) {
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);
browser_window_set_drag_type(bw, DRAGGING_NONE, NULL);
}
switch (drag_type) {
case DRAGGING_SELECTION: {
struct box *box;
int dir = -1;
int dx, dy;
if (selection_dragging_start(&html->sel))
dir = 1;
box = box_pick_text_box(html, x, y, dir, &dx, &dy);
if (box) {
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);
}
}
break;
default:
html_mouse_action(c, bw, mouse, x, y);
break;
}
}
/**
* 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 text_box_x = 0;
struct box *url_box = 0;
struct box *gadget_box = 0;
struct box *text_box = 0;
hlcache_handle *h = bw->current_content;
struct box *box;
hlcache_handle *content = h;
hlcache_handle *gadget_content = h;
struct form_control *gadget = 0;
hlcache_handle *object = 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;
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 (!mouse && html->scrollbar != NULL) {
/* drag end: scrollbar */
html_overflow_scroll_drag_end(html->scrollbar, mouse, x, y);
}
if (html->scrollbar != NULL) {
struct html_scrollbar_data *data =
scrollbar_get_data(html->scrollbar);
box = data->box;
box_coords(box, &box_x, &box_y);
if (scrollbar_is_horizontal(html->scrollbar)) {
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_action(html->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;
status = scrollbar_mouse_action(html->scrollbar, mouse,
scroll_mouse_x, scroll_mouse_y);
}
msg_data.explicit_status_text = status;
content_broadcast(c, CONTENT_MSG_STATUS, msg_data);
return;
}
/* Content related drags handled by now */
browser_window_set_drag_type(bw, DRAGGING_NONE, NULL);
/* search the box tree for a link, imagemap, form control, or
* box with scrollbars */
box = html_get_box_tree(h);
/* Consider the margins of the html page now */
box_x = box->margin[LEFT];
box_y = box->margin[TOP];
while ((next_box = box_at_point(box, x, y, &box_x, &box_y, &content)) !=
NULL) {
box = next_box;
if (box->style && css_computed_visibility(box->style) ==
CSS_VISIBILITY_HIDDEN)
continue;
if (box->object)
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_content = content;
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) &&
drag_candidate == NULL)
drag_candidate = box;
if (box->scroll_y != NULL || box->scroll_x != NULL) {
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_action(scrollbar, mouse,
scroll_mouse_x, scroll_mouse_y);
pointer = BROWSER_POINTER_DEFAULT;
} else if (gadget) {
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)
gui_create_form_select_menu(bw, gadget);
break;
case GADGET_CHECKBOX:
status = messages_get("FormCheckbox");
if (mouse & BROWSER_MOUSE_CLICK_1) {
gadget->selected = !gadget->selected;
html_redraw_a_box(gadget_content, gadget_box);
}
break;
case GADGET_RADIO:
status = messages_get("FormRadio");
if (mouse & BROWSER_MOUSE_CLICK_1)
form_radio_set(gadget_content, gadget);
break;
case GADGET_IMAGE:
if (mouse & BROWSER_MOUSE_CLICK_1) {
gadget->data.image.mx = x - gadget_box_x;
gadget->data.image.my = y - gadget_box_y;
}
/* 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_TEXTAREA:
status = messages_get("FormTextarea");
pointer = get_pointer_shape(gadget_box, false);
if (mouse & (BROWSER_MOUSE_PRESS_1 |
BROWSER_MOUSE_PRESS_2)) {
if (text_box && selection_root(&html->sel) !=
gadget_box)
selection_init(&html->sel, gadget_box);
textinput_textarea_click(c, mouse,
gadget_box,
gadget_box_x,
gadget_box_y,
x - gadget_box_x,
y - gadget_box_y);
}
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 - gadget_box_x - text_box->x,
&idx,
&pixel_offset);
selection_click(&html->sel, mouse,
text_box->byte_offset + idx);
if (selection_dragging(&html->sel)) {
browser_window_set_drag_type(bw,
DRAGGING_SELECTION,
NULL);
status = messages_get("Selecting");
} else
status = content_get_status_message(h);
}
else if (mouse & BROWSER_MOUSE_PRESS_1)
selection_clear(&html->sel, true);
break;
case GADGET_TEXTBOX:
case GADGET_PASSWORD:
status = messages_get("FormTextbox");
pointer = get_pointer_shape(gadget_box, false);
if ((mouse & BROWSER_MOUSE_PRESS_1) &&
!(mouse & (BROWSER_MOUSE_MOD_1 |
BROWSER_MOUSE_MOD_2))) {
textinput_input_click(c,
gadget_box,
gadget_box_x,
gadget_box_y,
x - gadget_box_x,
y - gadget_box_y);
}
if (text_box) {
int pixel_offset;
size_t idx;
if (mouse & (BROWSER_MOUSE_DRAG_1 |
BROWSER_MOUSE_DRAG_2))
selection_init(&html->sel, gadget_box);
font_plot_style_from_css(text_box->style,
&fstyle);
nsfont.font_position_in_string(&fstyle,
text_box->text,
text_box->length,
x - gadget_box_x - text_box->x,
&idx,
&pixel_offset);
selection_click(&html->sel, mouse,
text_box->byte_offset + idx);
if (selection_dragging(&html->sel))
browser_window_set_drag_type(bw,
DRAGGING_SELECTION,
NULL);
}
else if (mouse & BROWSER_MOUSE_PRESS_1)
selection_clear(&html->sel, true);
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");
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 */
status = content_get_status_message(h);
} 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 (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_go_post(bw, nsurl_access(url), 0, 0,
false,
nsurl_access(hlcache_handle_get_url(h)),
true, true, 0);
} else if (mouse & BROWSER_MOUSE_CLICK_2 &&
mouse & BROWSER_MOUSE_MOD_1) {
msg_data.savelink.url = nsurl_access(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) {
struct box *layout = html_get_box_tree(h);
if (mouse && (mouse < BROWSER_MOUSE_MOD_1) &&
selection_root(&html->sel) != layout) {
selection_init(&html->sel, layout);
}
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 */
if (selection_dragging(&html->sel)) {
browser_window_set_drag_type(bw,
DRAGGING_SELECTION,
NULL);
status =
messages_get("Selecting");
} else
status = content_get_status_message(h);
done = true;
}
}
else if (mouse & BROWSER_MOUSE_PRESS_1)
selection_clear(&html->sel, true);
}
if (!done) {
if (title)
status = title;
else if (bw->loading_content)
status = content_get_status_message(
bw->loading_content);
else
status = content_get_status_message(h);
if (mouse & BROWSER_MOUSE_DRAG_1) {
if (mouse & BROWSER_MOUSE_MOD_2) {
msg_data.dragsave.type =
CONTENT_SAVE_COMPLETE;
msg_data.dragsave.content = h;
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 = h;
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 */
browser_window_remove_caret(bw);
}
}
if (status != NULL) {
msg_data.explicit_status_text = status;
content_broadcast(c, CONTENT_MSG_STATUS, msg_data);
}
if (!iframe) {
msg_data.pointer = pointer;
content_broadcast(c, CONTENT_MSG_POINTER, msg_data);
}
/* 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_go(browser_window_find_target(bw, target, mouse),
nsurl_access(url),
nsurl_access(hlcache_handle_get_url(h)), true);
break;
case ACTION_NONE:
break;
}
}
/**
* 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;
switch(scrollbar_data->msg) {
case SCROLLBAR_MSG_MOVED:
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
};
browser_window_set_drag_type(html->bw,
DRAGGING_CONTENT_SCROLLBAR, &rect);
html->scrollbar = scrollbar_data->scrollbar;
}
break;
case SCROLLBAR_MSG_SCROLL_FINISHED:
html->scrollbar = NULL;
browser_window_set_drag_type(html->bw,
DRAGGING_NONE, NULL);
msg_data.pointer = BROWSER_POINTER_AUTO;
content_broadcast(data->c, CONTENT_MSG_POINTER,
msg_data);
break;
}
}
/**
* End overflow scroll scrollbar drags
*
* \param scroll 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);
}
}
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