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netsurf/render/box_textarea.c

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/*
* Copyright 2013 Michael Drake <tlsa@netsurf-browser.org>
*
* 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
* Box tree treeview box replacement (implementation).
*/
#include <dom/dom.h>
#include "utils/config.h"
#include "utils/log.h"
#include "netsurf/keypress.h"
#include "desktop/textarea.h"
#include "render/box_textarea.h"
#include "render/font.h"
#include "render/form_internal.h"
bool box_textarea_keypress(html_content *html, struct box *box, uint32_t key)
{
struct form_control *gadget = box->gadget;
struct textarea *ta = gadget->data.text.ta;
struct form* form = box->gadget->form;
struct content *c = (struct content *) html;
assert(ta != NULL);
if (gadget->type != GADGET_TEXTAREA) {
switch (key) {
case NS_KEY_NL:
case NS_KEY_CR:
if (form)
form_submit(content_get_url(c), html->bw,
form, 0);
return true;
case NS_KEY_TAB:
{
struct form_control *next_input;
/* Find next text entry field that is actually
* displayed (i.e. has an associated box) */
for (next_input = gadget->next;
next_input &&
((next_input->type != GADGET_TEXTBOX &&
next_input->type != GADGET_TEXTAREA &&
next_input->type != GADGET_PASSWORD) ||
!next_input->box);
next_input = next_input->next)
;
if (!next_input)
return true;
textarea_set_caret(ta, -1);
textarea_set_caret(next_input->data.text.ta, 0);
}
return true;
case NS_KEY_SHIFT_TAB:
{
struct form_control *prev_input;
/* Find previous text entry field that is actually
* displayed (i.e. has an associated box) */
for (prev_input = gadget->prev;
prev_input &&
((prev_input->type != GADGET_TEXTBOX &&
prev_input->type != GADGET_TEXTAREA &&
prev_input->type != GADGET_PASSWORD) ||
!prev_input->box);
prev_input = prev_input->prev)
;
if (!prev_input)
return true;
textarea_set_caret(ta, -1);
textarea_set_caret(prev_input->data.text.ta, 0);
}
return true;
default:
/* Pass to textarea widget */
break;
}
}
return textarea_keypress(ta, key);
}
/**
* Callback for html form textareas.
*/
static void box_textarea_callback(void *data, struct textarea_msg *msg)
{
struct form_textarea_data *d = data;
struct form_control *gadget = d->gadget;
struct html_content *html = d->gadget->html;
struct box *box = gadget->box;
switch (msg->type) {
case TEXTAREA_MSG_DRAG_REPORT:
if (msg->data.drag == TEXTAREA_DRAG_NONE) {
/* Textarea drag finished */
html_drag_type drag_type = HTML_DRAG_NONE;
union html_drag_owner drag_owner;
drag_owner.no_owner = true;
html_set_drag_type(html, drag_type, drag_owner,
NULL);
} else {
/* Textarea drag started */
struct rect rect = {
.x0 = INT_MIN,
.y0 = INT_MIN,
.x1 = INT_MAX,
.y1 = INT_MAX
};
union html_drag_owner drag_owner;
drag_owner.textarea = box;
switch (msg->data.drag) {
case TEXTAREA_DRAG_SCROLLBAR:
html_set_drag_type(html,
HTML_DRAG_TEXTAREA_SCROLLBAR,
drag_owner,
&rect);
break;
case TEXTAREA_DRAG_SELECTION:
html_set_drag_type(html,
HTML_DRAG_TEXTAREA_SELECTION,
drag_owner,
&rect);
break;
default:
LOG("Drag type %d not handled.", msg->data.drag);
/* This is a logic faliure in the
* front end code so abort.
*/
assert(0);
break;
}
}
break;
case TEXTAREA_MSG_REDRAW_REQUEST:
{
/* Request redraw of the required textarea rectangle */
int x, y;
if (html->reflowing == true) {
/* Can't redraw during layout, and it will
* be redrawn after layout anyway. */
break;
}
box_coords(box, &x, &y);
content__request_redraw((struct content *)html,
x + msg->data.redraw.x0,
y + msg->data.redraw.y0,
msg->data.redraw.x1 - msg->data.redraw.x0,
msg->data.redraw.y1 - msg->data.redraw.y0);
}
break;
case TEXTAREA_MSG_SELECTION_REPORT:
if (msg->data.selection.have_selection) {
/* Textarea now has a selection */
union html_selection_owner sel_owner;
sel_owner.textarea = box;
html_set_selection(html, HTML_SELECTION_TEXTAREA,
sel_owner,
msg->data.selection.read_only);
} else {
/* The textarea now has no selection */
union html_selection_owner sel_owner;
sel_owner.none = true;
html_set_selection(html, HTML_SELECTION_NONE,
sel_owner, true);
}
break;
case TEXTAREA_MSG_CARET_UPDATE:
if (html->bw == NULL)
break;
if (msg->data.caret.type == TEXTAREA_CARET_HIDE) {
union html_focus_owner focus_owner;
focus_owner.textarea = box;
html_set_focus(html, HTML_FOCUS_TEXTAREA,
focus_owner, true, 0, 0, 0, NULL);
} else {
union html_focus_owner focus_owner;
focus_owner.textarea = box;
html_set_focus(html, HTML_FOCUS_TEXTAREA,
focus_owner, false,
msg->data.caret.pos.x,
msg->data.caret.pos.y,
msg->data.caret.pos.height,
msg->data.caret.pos.clip);
}
break;
case TEXTAREA_MSG_TEXT_MODIFIED:
form_gadget_update_value(gadget,
strndup(msg->data.modified.text,
msg->data.modified.len));
break;
}
}
/* Exported interface, documented in box_textarea.h */
bool box_textarea_create_textarea(html_content *html,
struct box *box, struct dom_node *node)
{
dom_string *dom_text = NULL;
dom_exception err;
textarea_setup ta_setup;
textarea_flags ta_flags;
plot_font_style_t fstyle;
bool read_only = false;
struct form_control *gadget = box->gadget;
const char *text;
assert(gadget != NULL);
assert(gadget->type == GADGET_TEXTAREA ||
gadget->type == GADGET_TEXTBOX ||
gadget->type == GADGET_PASSWORD);
if (gadget->type == GADGET_TEXTAREA) {
dom_html_text_area_element *textarea =
(dom_html_text_area_element *) node;
ta_flags = TEXTAREA_MULTILINE;
err = dom_html_text_area_element_get_read_only(
textarea, &read_only);
if (err != DOM_NO_ERR)
return false;
/* Get the textarea's initial content */
err = dom_html_text_area_element_get_value(textarea, &dom_text);
if (err != DOM_NO_ERR)
return false;
} else {
dom_html_input_element *input = (dom_html_input_element *) node;
err = dom_html_input_element_get_read_only(
input, &read_only);
if (err != DOM_NO_ERR)
return false;
if (gadget->type == GADGET_PASSWORD)
ta_flags = TEXTAREA_PASSWORD;
else
ta_flags = TEXTAREA_DEFAULT;
/* Get initial text */
err = dom_html_input_element_get_value(input, &dom_text);
if (err != DOM_NO_ERR)
return false;
}
if (dom_text != NULL) {
text = dom_string_data(dom_text);
} else {
/* No initial text, or failed reading it;
* use a blank string */
text = "";
}
if (read_only)
ta_flags |= TEXTAREA_READONLY;
gadget->data.text.data.gadget = gadget;
font_plot_style_from_css(gadget->box->style, &fstyle);
/* Reset to correct values by layout */
ta_setup.width = 200;
ta_setup.height = 20;
ta_setup.pad_top = 4;
ta_setup.pad_right = 4;
ta_setup.pad_bottom = 4;
ta_setup.pad_left = 4;
/* Set remaining data */
ta_setup.border_width = 0;
ta_setup.border_col = 0x000000;
ta_setup.text = fstyle;
ta_setup.text.background = NS_TRANSPARENT;
/* Make selected text either black or white, as gives greatest contrast
* with background colour. */
ta_setup.selected_bg = fstyle.foreground;
ta_setup.selected_text = colour_to_bw_furthest(ta_setup.selected_bg);
/* Hand reference to dom text over to gadget */
gadget->data.text.initial = dom_text;
gadget->data.text.ta = textarea_create(ta_flags, &ta_setup,
box_textarea_callback, &gadget->data.text.data);
if (gadget->data.text.ta == NULL) {
return false;
}
if (!textarea_set_text(gadget->data.text.ta, text))
return false;
return true;
}
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