285 lines
9.3 KiB
C
285 lines
9.3 KiB
C
/*
|
|
* Copyright 2006 John-Mark Bell <jmb@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
|
|
* Single/Multi-line UTF-8 text area (interface)
|
|
*/
|
|
|
|
#ifndef _NETSURF_DESKTOP_TEXTAREA_H_
|
|
#define _NETSURF_DESKTOP_TEXTAREA_H_
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include "desktop/browser.h"
|
|
#include "desktop/plot_style.h"
|
|
|
|
|
|
struct textarea;
|
|
|
|
/* Text area flags */
|
|
typedef enum {
|
|
TEXTAREA_DEFAULT = (1 << 0), /**< Standard input */
|
|
TEXTAREA_MULTILINE = (1 << 1), /**< Multiline area */
|
|
TEXTAREA_READONLY = (1 << 2), /**< Non-editable */
|
|
TEXTAREA_INTERNAL_CARET = (1 << 3), /**< Render own caret */
|
|
TEXTAREA_PASSWORD = (1 << 4) /**< Obscured display */
|
|
} textarea_flags;
|
|
|
|
typedef enum {
|
|
TEXTAREA_DRAG_NONE,
|
|
TEXTAREA_DRAG_SCROLLBAR,
|
|
TEXTAREA_DRAG_SELECTION
|
|
} textarea_drag_type; /**< Textarea drag status */
|
|
|
|
typedef enum {
|
|
TEXTAREA_MSG_DRAG_REPORT, /**< Textarea drag start/end report */
|
|
TEXTAREA_MSG_SELECTION_REPORT, /**< Textarea text selection presence */
|
|
TEXTAREA_MSG_REDRAW_REQUEST, /**< Textarea redraw request */
|
|
TEXTAREA_MSG_CARET_UPDATE /**< Textarea caret */
|
|
} textarea_msg_type;
|
|
|
|
struct textarea_msg {
|
|
struct textarea *ta; /**< The textarea widget */
|
|
|
|
textarea_msg_type type; /**< Indicates message data type */
|
|
union {
|
|
textarea_drag_type drag; /**< With _DRAG_REPORT */
|
|
struct {
|
|
bool have_selection; /**< Selection exists */
|
|
bool read_only; /**< Selection can't be cut */
|
|
} selection; /**< With _SELECTION_REPORT */
|
|
struct rect redraw; /**< With _REDRAW_REQUEST */
|
|
struct {
|
|
enum {
|
|
TEXTAREA_CARET_SET_POS, /**< Set coord/height */
|
|
TEXTAREA_CARET_HIDE /**< Hide */
|
|
} type;
|
|
struct {
|
|
int x; /**< Carret x-coord */
|
|
int y; /**< Carret y-coord */
|
|
int height; /**< Carret height */
|
|
struct rect *clip; /**< Carret clip rect */
|
|
} pos; /**< With _CARET_SET_POS */
|
|
} caret; /**< With _CARET_UPDATE */
|
|
} data; /**< Depends on msg type */
|
|
};
|
|
|
|
typedef struct textarea_setup {
|
|
int width; /**< Textarea width */
|
|
int height; /**< Textarea height */
|
|
|
|
int pad_top; /**< Textarea top padding */
|
|
int pad_right; /**< Textarea right padding */
|
|
int pad_bottom; /**< Textarea bottom padding */
|
|
int pad_left; /**< Textarea left padding */
|
|
|
|
int border_width; /**< Textarea border width */
|
|
colour border_col; /**< Textarea border colour */
|
|
|
|
colour selected_text; /**< Textarea selected text colour */
|
|
colour selected_bg; /**< Textarea selection background colour */
|
|
plot_font_style_t text; /**< Textarea background colour and font */
|
|
|
|
} textarea_setup;
|
|
|
|
/**
|
|
* Client callback for the textarea
|
|
*
|
|
* \param data user data passed at textarea creation
|
|
* \param textarea_msg textarea message data
|
|
*/
|
|
typedef void(*textarea_client_callback)(void *data, struct textarea_msg *msg);
|
|
|
|
/**
|
|
* Create a text area
|
|
*
|
|
* \param setup textarea settings and style
|
|
* \param redraw_callback will be called when textarea wants to redraw
|
|
* \param data user specified data which will be passed to callbacks
|
|
* \return Opaque handle for textarea or 0 on error
|
|
*/
|
|
struct textarea *textarea_create(const textarea_flags flags,
|
|
const textarea_setup *setup,
|
|
textarea_client_callback callback, void *data);
|
|
|
|
/**
|
|
* Destroy a text area
|
|
*
|
|
* \param ta Text area to destroy
|
|
*/
|
|
void textarea_destroy(struct textarea *ta);
|
|
|
|
/**
|
|
* Set the text in a text area, discarding any current text
|
|
*
|
|
* \param ta Text area
|
|
* \param text UTF-8 text to set text area's contents to
|
|
* \return true on success, false on memory exhaustion
|
|
*/
|
|
bool textarea_set_text(struct textarea *ta, const char *text);
|
|
|
|
/**
|
|
* Insert the text in a text area at the caret, replacing any selection.
|
|
*
|
|
* \param ta Text area
|
|
* \param text UTF-8 text to set text area's contents to
|
|
* \return true on success, false on memory exhaustion or if ta lacks caret
|
|
*/
|
|
bool textarea_drop_text(struct textarea *ta, const char *text,
|
|
size_t text_length);
|
|
|
|
/**
|
|
* Extract the text from a text area
|
|
*
|
|
* \param ta Text area
|
|
* \param buf Pointer to buffer to receive data, or NULL
|
|
* to read length required (includes trailing '\0')
|
|
* \param len Length (bytes) of buffer pointed to by buf, or 0 to read length
|
|
* \return Length (bytes) written/required or -1 on error
|
|
*/
|
|
int textarea_get_text(struct textarea *ta, char *buf, unsigned int len);
|
|
|
|
/**
|
|
* Set the caret's position
|
|
*
|
|
* \param ta Text area
|
|
* \param caret 0-based character index to place caret at, -1 removes
|
|
* the caret
|
|
* \return true on success false otherwise
|
|
*/
|
|
bool textarea_set_caret(struct textarea *ta, int caret);
|
|
|
|
/**
|
|
* Handle redraw requests for text areas
|
|
*
|
|
* \param ta textarea to render
|
|
* \param x x coordinate of textarea top
|
|
* \param y y coordinate of textarea left
|
|
* \param bg background colour under textarea
|
|
* \param scale scale to render at
|
|
* \param clip clip rectangle
|
|
* \param ctx current redraw context
|
|
*/
|
|
void textarea_redraw(struct textarea *ta, int x, int y, colour bg, float scale,
|
|
const struct rect *clip, const struct redraw_context *ctx);
|
|
|
|
/**
|
|
* Key press handling for text areas.
|
|
*
|
|
* \param ta The text area which got the keypress
|
|
* \param key The ucs4 character codepoint
|
|
* \return true if the keypress is dealt with, false otherwise.
|
|
*/
|
|
bool textarea_keypress(struct textarea *ta, uint32_t key);
|
|
|
|
/* Text area mouse input status flags */
|
|
typedef enum {
|
|
TEXTAREA_MOUSE_NONE = 0, /**< Not relevant */
|
|
TEXTAREA_MOUSE_USED = (1 << 0), /**< Took action with input */
|
|
TEXTAREA_MOUSE_EDITOR = (1 << 1), /**< Hover: caret pointer */
|
|
TEXTAREA_MOUSE_SELECTION= (1 << 2), /**< Hover: selection */
|
|
TEXTAREA_MOUSE_SCR_USED = (1 << 3), /**< Scrollbar action */
|
|
TEXTAREA_MOUSE_SCR_BOTH = (1 << 4), /**< Scrolling both bars */
|
|
TEXTAREA_MOUSE_SCR_UP = (1 << 5), /**< Hover: scroll up */
|
|
TEXTAREA_MOUSE_SCR_PUP = (1 << 6), /**< Hover: scroll page up */
|
|
TEXTAREA_MOUSE_SCR_VRT = (1 << 7), /**< Hover: vert. drag bar */
|
|
TEXTAREA_MOUSE_SCR_PDWN = (1 << 8), /**< Hover: scroll page down */
|
|
TEXTAREA_MOUSE_SCR_DWN = (1 << 9), /**< Hover: scroll down */
|
|
TEXTAREA_MOUSE_SCR_LFT = (1 << 10), /**< Hover: scroll left */
|
|
TEXTAREA_MOUSE_SCR_PLFT = (1 << 11), /**< Hover: scroll page left */
|
|
TEXTAREA_MOUSE_SCR_HRZ = (1 << 12), /**< Hover: horiz. drag bar */
|
|
TEXTAREA_MOUSE_SCR_PRGT = (1 << 13), /**< Hover: scroll page right */
|
|
TEXTAREA_MOUSE_SCR_RGT = (1 << 14) /**< Hover: scroll right */
|
|
} textarea_mouse_status;
|
|
|
|
/**
|
|
* Handles all kinds of mouse action
|
|
*
|
|
* \param ta Text area
|
|
* \param mouse the mouse state at action moment
|
|
* \param x X coordinate
|
|
* \param y Y coordinate
|
|
* \return the textarea mouse status
|
|
*/
|
|
textarea_mouse_status textarea_mouse_action(struct textarea *ta,
|
|
browser_mouse_state mouse, int x, int y);
|
|
|
|
/**
|
|
* Clear any selection in the textarea.
|
|
*
|
|
* \param ta textarea widget
|
|
* \return true if there was a selection to clear, false otherwise
|
|
*/
|
|
bool textarea_clear_selection(struct textarea *ta);
|
|
|
|
/**
|
|
* Get selected text, ownership passed to caller, which needs to free() it.
|
|
*
|
|
* \param ta Textarea widget
|
|
* \return Selected text, or NULL if none.
|
|
*/
|
|
char *textarea_get_selection(struct textarea *ta);
|
|
|
|
/**
|
|
* Gets the dimensions of a textarea
|
|
*
|
|
* \param ta textarea widget
|
|
* \param width if not NULL, gets updated to the width of the textarea
|
|
* \param height if not NULL, gets updated to the height of the textarea
|
|
*/
|
|
void textarea_get_dimensions(struct textarea *ta, int *width, int *height);
|
|
|
|
/**
|
|
* Set the dimensions of a textarea, causing a reflow and
|
|
* Does not emit a redraw request. Up to client to call textarea_redraw.
|
|
*
|
|
* \param ta textarea widget
|
|
* \param width the new width of the textarea
|
|
* \param height the new height of the textarea
|
|
*/
|
|
void textarea_set_dimensions(struct textarea *ta, int width, int height);
|
|
|
|
/**
|
|
* Set the dimensions and padding of a textarea, causing a reflow.
|
|
* Does not emit a redraw request. Up to client to call textarea_redraw.
|
|
*
|
|
* \param ta textarea widget
|
|
* \param width the new width of the textarea
|
|
* \param height the new height of the textarea
|
|
* \param top the new top padding of the textarea
|
|
* \param right the new right padding of the textarea
|
|
* \param bottom the new bottom padding of the textarea
|
|
* \param left the new left padding of the textarea
|
|
*/
|
|
void textarea_set_layout(struct textarea *ta, int width, int height,
|
|
int top, int right, int bottom, int left);
|
|
|
|
/**
|
|
* Scroll a textarea by an amount. Only does anything if multi-line textarea
|
|
* has scrollbars. If it scrolls, it will emit a redraw request.
|
|
*
|
|
* \param ta textarea widget
|
|
* \param scrx number of px try to scroll in x direction
|
|
* \param scry number of px try to scroll in y direction
|
|
* \return true iff the textarea was scrolled
|
|
*/
|
|
bool textarea_scroll(struct textarea *ta, int scrx, int scry);
|
|
#endif
|
|
|