1054 lines
33 KiB
C
1054 lines
33 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "common/surface.h"
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#include "terminal/common.h"
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#include "terminal/display.h"
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#include "terminal/palette.h"
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#include "terminal/terminal.h"
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#include "terminal/terminal-priv.h"
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#include "terminal/types.h"
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include <cairo/cairo.h>
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#include <glib-object.h>
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#include <guacamole/client.h>
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#include <guacamole/protocol.h>
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#include <guacamole/socket.h>
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#include <pango/pangocairo.h>
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/* Maps any codepoint onto a number between 0 and 511 inclusive */
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int __guac_terminal_hash_codepoint(int codepoint) {
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/* If within one byte, just return codepoint */
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if (codepoint <= 0xFF)
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return codepoint;
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/* Otherwise, map to next 256 values */
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return (codepoint & 0xFF) + 0x100;
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}
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/**
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* Sets the attributes of the display such that future glyphs will render as
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* expected.
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*/
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int __guac_terminal_set_colors(guac_terminal_display* display,
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guac_terminal_attributes* attributes) {
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const guac_terminal_color* background;
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const guac_terminal_color* foreground;
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/* Handle reverse video */
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if (attributes->reverse != attributes->cursor) {
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background = &attributes->foreground;
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foreground = &attributes->background;
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}
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else {
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foreground = &attributes->foreground;
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background = &attributes->background;
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}
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/* Handle bold */
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if (attributes->bold && !attributes->half_bright
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&& foreground->palette_index >= GUAC_TERMINAL_FIRST_DARK
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&& foreground->palette_index <= GUAC_TERMINAL_LAST_DARK) {
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foreground = &display->palette[foreground->palette_index
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+ GUAC_TERMINAL_INTENSE_OFFSET];
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}
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display->glyph_foreground = *foreground;
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guac_terminal_display_lookup_color(display,
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foreground->palette_index, &display->glyph_foreground);
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display->glyph_background = *background;
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guac_terminal_display_lookup_color(display,
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background->palette_index, &display->glyph_background);
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/* Modify color if half-bright (low intensity) */
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if (attributes->half_bright && !attributes->bold) {
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display->glyph_foreground.red /= 2;
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display->glyph_foreground.green /= 2;
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display->glyph_foreground.blue /= 2;
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}
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return 0;
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}
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/**
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* Sends the given character to the terminal at the given row and column,
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* rendering the character immediately. This bypasses the guac_terminal_display
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* mechanism and is intended for flushing of updates only.
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*/
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int __guac_terminal_set(guac_terminal_display* display, int row, int col, int codepoint) {
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int width;
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int bytes;
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char utf8[4];
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/* Use foreground color */
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const guac_terminal_color* color = &display->glyph_foreground;
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/* Use background color */
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const guac_terminal_color* background = &display->glyph_background;
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cairo_surface_t* surface;
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cairo_t* cairo;
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int surface_width, surface_height;
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PangoLayout* layout;
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int layout_width, layout_height;
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int ideal_layout_width, ideal_layout_height;
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/* Calculate width in columns */
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width = wcwidth(codepoint);
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if (width < 0)
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width = 1;
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/* Do nothing if glyph is empty */
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if (width == 0)
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return 0;
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/* Convert to UTF-8 */
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bytes = guac_terminal_encode_utf8(codepoint, utf8);
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surface_width = width * display->char_width;
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surface_height = display->char_height;
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ideal_layout_width = surface_width * PANGO_SCALE;
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ideal_layout_height = surface_height * PANGO_SCALE;
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/* Prepare surface */
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surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
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surface_width, surface_height);
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cairo = cairo_create(surface);
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/* Fill background */
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cairo_set_source_rgb(cairo,
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background->red / 255.0,
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background->green / 255.0,
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background->blue / 255.0);
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cairo_rectangle(cairo, 0, 0, surface_width, surface_height);
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cairo_fill(cairo);
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/* Get layout */
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layout = pango_cairo_create_layout(cairo);
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pango_layout_set_font_description(layout, display->font_desc);
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pango_layout_set_text(layout, utf8, bytes);
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pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
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pango_layout_get_size(layout, &layout_width, &layout_height);
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/* If layout bigger than available space, scale it back */
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if (layout_width > ideal_layout_width || layout_height > ideal_layout_height) {
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double scale = fmin(ideal_layout_width / (double) layout_width,
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ideal_layout_height / (double) layout_height);
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cairo_scale(cairo, scale, scale);
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/* Update layout to reflect scaled surface */
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pango_layout_set_width(layout, ideal_layout_width / scale);
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pango_layout_set_height(layout, ideal_layout_height / scale);
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pango_cairo_update_layout(cairo, layout);
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}
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/* Draw */
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cairo_set_source_rgb(cairo,
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color->red / 255.0,
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color->green / 255.0,
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color->blue / 255.0);
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cairo_move_to(cairo, 0.0, 0.0);
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pango_cairo_show_layout(cairo, layout);
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/* Draw */
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guac_common_surface_draw(display->display_surface,
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display->char_width * col,
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display->char_height * row,
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surface);
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/* Free all */
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g_object_unref(layout);
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cairo_destroy(cairo);
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cairo_surface_destroy(surface);
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return 0;
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}
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/**
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* Calculate the size of margins around the terminal based on DPI.
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*
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* @param dpi
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* The resolution of the display in DPI.
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*
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* @return
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* Calculated size of margin in pixels.
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*/
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static int get_margin_by_dpi(int dpi) {
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return dpi * GUAC_TERMINAL_MARGINS / GUAC_TERMINAL_MM_PER_INCH;
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}
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guac_terminal_display* guac_terminal_display_alloc(guac_client* client,
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const char* font_name, int font_size, int dpi,
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guac_terminal_color* foreground, guac_terminal_color* background,
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guac_terminal_color (*palette)[256]) {
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/* Allocate display */
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guac_terminal_display* display = malloc(sizeof(guac_terminal_display));
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display->client = client;
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/* Initially no font loaded */
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display->font_desc = NULL;
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display->char_width = 0;
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display->char_height = 0;
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/* Create default surface */
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display->display_layer = guac_client_alloc_layer(client);
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display->select_layer = guac_client_alloc_layer(client);
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display->display_surface = guac_common_surface_alloc(client,
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client->socket, display->display_layer, 0, 0);
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/* Never use lossy compression for terminal contents */
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guac_common_surface_set_lossless(display->display_surface, 1);
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/* Select layer is a child of the display layer */
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guac_protocol_send_move(client->socket, display->select_layer,
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display->display_layer, 0, 0, 0);
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/* Calculate margin size by DPI */
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display->margin = get_margin_by_dpi(dpi);
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/* Offset the Default Layer to make margins even on all sides */
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guac_protocol_send_move(client->socket, display->display_layer,
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GUAC_DEFAULT_LAYER, display->margin, display->margin, 0);
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display->default_foreground = display->glyph_foreground = *foreground;
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display->default_background = display->glyph_background = *background;
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display->default_palette = palette;
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/* Initially empty */
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display->width = 0;
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display->height = 0;
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display->operations = NULL;
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/* Initially nothing selected */
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display->text_selected = false;
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/* Attempt to load font */
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if (guac_terminal_display_set_font(display, font_name, font_size, dpi)) {
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guac_client_abort(display->client, GUAC_PROTOCOL_STATUS_SERVER_ERROR,
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"Unable to set initial font \"%s\"", font_name);
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free(display);
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return NULL;
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}
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return display;
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}
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void guac_terminal_display_free(guac_terminal_display* display) {
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/* Free font description */
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pango_font_description_free(display->font_desc);
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/* Free default palette. */
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free(display->default_palette);
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/* Free operations buffers */
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free(display->operations);
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/* Free display */
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free(display);
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}
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void guac_terminal_display_reset_palette(guac_terminal_display* display) {
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/* Reinitialize palette with default values */
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if (display->default_palette) {
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memcpy(display->palette, *display->default_palette,
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sizeof(GUAC_TERMINAL_INITIAL_PALETTE));
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return;
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}
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memcpy(display->palette, GUAC_TERMINAL_INITIAL_PALETTE,
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sizeof(GUAC_TERMINAL_INITIAL_PALETTE));
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}
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int guac_terminal_display_assign_color(guac_terminal_display* display,
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int index, const guac_terminal_color* color) {
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/* Assignment fails if out-of-bounds */
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if (index < 0 || index > 255)
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return 1;
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/* Copy color components */
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display->palette[index].red = color->red;
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display->palette[index].green = color->green;
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display->palette[index].blue = color->blue;
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/* Color successfully stored */
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return 0;
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}
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int guac_terminal_display_lookup_color(guac_terminal_display* display,
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int index, guac_terminal_color* color) {
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/* Use default foreground if foreground pseudo-index is given */
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if (index == GUAC_TERMINAL_COLOR_FOREGROUND) {
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*color = display->default_foreground;
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return 0;
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}
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/* Use default background if background pseudo-index is given */
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if (index == GUAC_TERMINAL_COLOR_BACKGROUND) {
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*color = display->default_background;
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return 0;
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}
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/* Lookup fails if out-of-bounds */
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if (index < 0 || index > 255)
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return 1;
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/* Copy color definition */
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*color = display->palette[index];
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return 0;
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}
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void guac_terminal_display_copy_columns(guac_terminal_display* display, int row,
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int start_column, int end_column, int offset) {
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int i;
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guac_terminal_operation* src_current;
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guac_terminal_operation* current;
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/* Ignore operations outside display bounds */
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if (row < 0 || row >= display->height)
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return;
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/* Fit range within bounds */
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start_column = guac_terminal_fit_to_range(start_column, 0, display->width - 1);
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end_column = guac_terminal_fit_to_range(end_column, 0, display->width - 1);
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start_column = guac_terminal_fit_to_range(start_column + offset, 0, display->width - 1) - offset;
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end_column = guac_terminal_fit_to_range(end_column + offset, 0, display->width - 1) - offset;
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src_current = &(display->operations[row * display->width + start_column]);
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current = &(display->operations[row * display->width + start_column + offset]);
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/* Move data */
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memmove(current, src_current,
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(end_column - start_column + 1) * sizeof(guac_terminal_operation));
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/* Update operations */
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for (i=start_column; i<=end_column; i++) {
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/* If no operation here, set as copy */
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if (current->type == GUAC_CHAR_NOP) {
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current->type = GUAC_CHAR_COPY;
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current->row = row;
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current->column = i;
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}
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/* Next column */
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current++;
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}
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}
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void guac_terminal_display_copy_rows(guac_terminal_display* display,
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int start_row, int end_row, int offset) {
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int row, col;
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guac_terminal_operation* src_current_row;
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guac_terminal_operation* current_row;
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/* Fit range within bounds */
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start_row = guac_terminal_fit_to_range(start_row, 0, display->height - 1);
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end_row = guac_terminal_fit_to_range(end_row, 0, display->height - 1);
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start_row = guac_terminal_fit_to_range(start_row + offset, 0, display->height - 1) - offset;
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end_row = guac_terminal_fit_to_range(end_row + offset, 0, display->height - 1) - offset;
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src_current_row = &(display->operations[start_row * display->width]);
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current_row = &(display->operations[(start_row + offset) * display->width]);
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/* Move data */
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memmove(current_row, src_current_row,
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(end_row - start_row + 1) * sizeof(guac_terminal_operation) * display->width);
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/* Update operations */
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for (row=start_row; row<=end_row; row++) {
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guac_terminal_operation* current = current_row;
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for (col=0; col<display->width; col++) {
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/* If no operation here, set as copy */
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if (current->type == GUAC_CHAR_NOP) {
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current->type = GUAC_CHAR_COPY;
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current->row = row;
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current->column = col;
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}
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/* Next column */
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current++;
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}
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/* Next row */
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current_row += display->width;
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}
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}
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void guac_terminal_display_set_columns(guac_terminal_display* display, int row,
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int start_column, int end_column, guac_terminal_char* character) {
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int i;
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guac_terminal_operation* current;
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/* Do nothing if glyph is empty */
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if (character->width == 0)
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return;
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/* Ignore operations outside display bounds */
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if (row < 0 || row >= display->height)
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return;
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/* Fit range within bounds */
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start_column = guac_terminal_fit_to_range(start_column, 0, display->width - 1);
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end_column = guac_terminal_fit_to_range(end_column, 0, display->width - 1);
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current = &(display->operations[row * display->width + start_column]);
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/* For each column in range */
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for (i = start_column; i <= end_column; i += character->width) {
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/* Set operation */
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current->type = GUAC_CHAR_SET;
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current->character = *character;
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/* Next character */
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current += character->width;
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}
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}
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void guac_terminal_display_resize(guac_terminal_display* display, int width, int height) {
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/* Resize display only if dimensions have changed */
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if (width == display->width && height == display->height)
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return;
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guac_terminal_operation* current;
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int x, y;
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/* Fill with background color */
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guac_terminal_char fill = {
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.value = 0,
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.attributes = {
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.foreground = display->default_background,
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.background = display->default_background
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},
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.width = 1
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};
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/* Free old operations buffer */
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if (display->operations != NULL)
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free(display->operations);
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/* Alloc operations */
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display->operations = malloc(width * height *
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sizeof(guac_terminal_operation));
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/* Init each operation buffer row */
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current = display->operations;
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for (y=0; y<height; y++) {
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/* Init entire row to NOP */
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for (x=0; x<width; x++) {
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/* If on old part of screen, do not clear */
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if (x < display->width && y < display->height)
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current->type = GUAC_CHAR_NOP;
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/* Otherwise, clear contents first */
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else {
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current->type = GUAC_CHAR_SET;
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current->character = fill;
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}
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current++;
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}
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}
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/* Set width and height */
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display->width = width;
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display->height = height;
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/* Send display size */
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guac_common_surface_resize(
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display->display_surface,
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display->char_width * width,
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display->char_height * height);
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guac_protocol_send_size(display->client->socket,
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display->select_layer,
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display->char_width * width,
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display->char_height * height);
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}
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void __guac_terminal_display_flush_copy(guac_terminal_display* display) {
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guac_terminal_operation* current = display->operations;
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int row, col;
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/* For each operation */
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for (row=0; row<display->height; row++) {
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for (col=0; col<display->width; col++) {
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/* If operation is a copy operation */
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if (current->type == GUAC_CHAR_COPY) {
|
|
|
|
/* The determined bounds of the rectangle of contiguous
|
|
* operations */
|
|
int detected_right = -1;
|
|
int detected_bottom = row;
|
|
|
|
/* The current row or column within a rectangle */
|
|
int rect_row, rect_col;
|
|
|
|
/* The dimensions of the rectangle as determined */
|
|
int rect_width, rect_height;
|
|
|
|
/* The expected row and column source for the next copy
|
|
* operation (if adjacent to current) */
|
|
int expected_row, expected_col;
|
|
|
|
/* Current row within a subrect */
|
|
guac_terminal_operation* rect_current_row;
|
|
|
|
/* Determine bounds of rectangle */
|
|
rect_current_row = current;
|
|
expected_row = current->row;
|
|
for (rect_row=row; rect_row<display->height; rect_row++) {
|
|
|
|
guac_terminal_operation* rect_current = rect_current_row;
|
|
expected_col = current->column;
|
|
|
|
/* Find width */
|
|
for (rect_col=col; rect_col<display->width; rect_col++) {
|
|
|
|
/* If not identical operation, stop */
|
|
if (rect_current->type != GUAC_CHAR_COPY
|
|
|| rect_current->row != expected_row
|
|
|| rect_current->column != expected_col)
|
|
break;
|
|
|
|
/* Next column */
|
|
rect_current++;
|
|
expected_col++;
|
|
|
|
}
|
|
|
|
/* If too small, cannot append row */
|
|
if (rect_col-1 < detected_right)
|
|
break;
|
|
|
|
/* As row has been accepted, update rect_row of rect */
|
|
detected_bottom = rect_row;
|
|
|
|
/* For now, only set rect_col bound if uninitialized */
|
|
if (detected_right == -1)
|
|
detected_right = rect_col - 1;
|
|
|
|
/* Next row */
|
|
rect_current_row += display->width;
|
|
expected_row++;
|
|
|
|
}
|
|
|
|
/* Calculate dimensions */
|
|
rect_width = detected_right - col + 1;
|
|
rect_height = detected_bottom - row + 1;
|
|
|
|
/* Mark rect as NOP (as it has been handled) */
|
|
rect_current_row = current;
|
|
expected_row = current->row;
|
|
for (rect_row=0; rect_row<rect_height; rect_row++) {
|
|
|
|
guac_terminal_operation* rect_current = rect_current_row;
|
|
expected_col = current->column;
|
|
|
|
for (rect_col=0; rect_col<rect_width; rect_col++) {
|
|
|
|
/* Mark copy operations as NOP */
|
|
if (rect_current->type == GUAC_CHAR_COPY
|
|
&& rect_current->row == expected_row
|
|
&& rect_current->column == expected_col)
|
|
rect_current->type = GUAC_CHAR_NOP;
|
|
|
|
/* Next column */
|
|
rect_current++;
|
|
expected_col++;
|
|
|
|
}
|
|
|
|
/* Next row */
|
|
rect_current_row += display->width;
|
|
expected_row++;
|
|
|
|
}
|
|
|
|
/* Send copy */
|
|
guac_common_surface_copy(
|
|
|
|
display->display_surface,
|
|
current->column * display->char_width,
|
|
current->row * display->char_height,
|
|
rect_width * display->char_width,
|
|
rect_height * display->char_height,
|
|
|
|
display->display_surface,
|
|
col * display->char_width,
|
|
row * display->char_height);
|
|
|
|
} /* end if copy operation */
|
|
|
|
/* Next operation */
|
|
current++;
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
void __guac_terminal_display_flush_clear(guac_terminal_display* display) {
|
|
|
|
guac_terminal_operation* current = display->operations;
|
|
int row, col;
|
|
|
|
/* For each operation */
|
|
for (row=0; row<display->height; row++) {
|
|
for (col=0; col<display->width; col++) {
|
|
|
|
/* If operation is a cler operation (set to space) */
|
|
if (current->type == GUAC_CHAR_SET &&
|
|
!guac_terminal_has_glyph(current->character.value)) {
|
|
|
|
/* The determined bounds of the rectangle of contiguous
|
|
* operations */
|
|
int detected_right = -1;
|
|
int detected_bottom = row;
|
|
|
|
/* The current row or column within a rectangle */
|
|
int rect_row, rect_col;
|
|
|
|
/* The dimensions of the rectangle as determined */
|
|
int rect_width, rect_height;
|
|
|
|
/* Color of the rectangle to draw */
|
|
guac_terminal_color color;
|
|
if (current->character.attributes.reverse != current->character.attributes.cursor)
|
|
color = current->character.attributes.foreground;
|
|
else
|
|
color = current->character.attributes.background;
|
|
|
|
/* Rely only on palette index if defined */
|
|
guac_terminal_display_lookup_color(display,
|
|
color.palette_index, &color);
|
|
|
|
/* Current row within a subrect */
|
|
guac_terminal_operation* rect_current_row;
|
|
|
|
/* Determine bounds of rectangle */
|
|
rect_current_row = current;
|
|
for (rect_row=row; rect_row<display->height; rect_row++) {
|
|
|
|
guac_terminal_operation* rect_current = rect_current_row;
|
|
|
|
/* Find width */
|
|
for (rect_col=col; rect_col<display->width; rect_col++) {
|
|
|
|
const guac_terminal_color* joining_color;
|
|
if (rect_current->character.attributes.reverse != rect_current->character.attributes.cursor)
|
|
joining_color = &rect_current->character.attributes.foreground;
|
|
else
|
|
joining_color = &rect_current->character.attributes.background;
|
|
|
|
/* If not identical operation, stop */
|
|
if (rect_current->type != GUAC_CHAR_SET
|
|
|| guac_terminal_has_glyph(rect_current->character.value)
|
|
|| guac_terminal_colorcmp(joining_color, &color) != 0)
|
|
break;
|
|
|
|
/* Next column */
|
|
rect_current++;
|
|
|
|
}
|
|
|
|
/* If too small, cannot append row */
|
|
if (rect_col-1 < detected_right)
|
|
break;
|
|
|
|
/* As row has been accepted, update rect_row of rect */
|
|
detected_bottom = rect_row;
|
|
|
|
/* For now, only set rect_col bound if uninitialized */
|
|
if (detected_right == -1)
|
|
detected_right = rect_col - 1;
|
|
|
|
/* Next row */
|
|
rect_current_row += display->width;
|
|
|
|
}
|
|
|
|
/* Calculate dimensions */
|
|
rect_width = detected_right - col + 1;
|
|
rect_height = detected_bottom - row + 1;
|
|
|
|
/* Mark rect as NOP (as it has been handled) */
|
|
rect_current_row = current;
|
|
for (rect_row=0; rect_row<rect_height; rect_row++) {
|
|
|
|
guac_terminal_operation* rect_current = rect_current_row;
|
|
|
|
for (rect_col=0; rect_col<rect_width; rect_col++) {
|
|
|
|
const guac_terminal_color* joining_color;
|
|
if (rect_current->character.attributes.reverse != rect_current->character.attributes.cursor)
|
|
joining_color = &rect_current->character.attributes.foreground;
|
|
else
|
|
joining_color = &rect_current->character.attributes.background;
|
|
|
|
/* Mark clear operations as NOP */
|
|
if (rect_current->type == GUAC_CHAR_SET
|
|
&& !guac_terminal_has_glyph(rect_current->character.value)
|
|
&& guac_terminal_colorcmp(joining_color, &color) == 0)
|
|
rect_current->type = GUAC_CHAR_NOP;
|
|
|
|
/* Next column */
|
|
rect_current++;
|
|
|
|
}
|
|
|
|
/* Next row */
|
|
rect_current_row += display->width;
|
|
|
|
}
|
|
|
|
/* Send rect */
|
|
guac_common_surface_set(
|
|
display->display_surface,
|
|
col * display->char_width,
|
|
row * display->char_height,
|
|
rect_width * display->char_width,
|
|
rect_height * display->char_height,
|
|
color.red, color.green, color.blue,
|
|
0xFF);
|
|
|
|
} /* end if clear operation */
|
|
|
|
/* Next operation */
|
|
current++;
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void __guac_terminal_display_flush_set(guac_terminal_display* display) {
|
|
|
|
guac_terminal_operation* current = display->operations;
|
|
int row, col;
|
|
|
|
/* For each operation */
|
|
for (row=0; row<display->height; row++) {
|
|
for (col=0; col<display->width; col++) {
|
|
|
|
/* Perform given operation */
|
|
if (current->type == GUAC_CHAR_SET) {
|
|
|
|
int codepoint = current->character.value;
|
|
|
|
/* Use space if no glyph */
|
|
if (!guac_terminal_has_glyph(codepoint))
|
|
codepoint = ' ';
|
|
|
|
/* Set attributes */
|
|
__guac_terminal_set_colors(display,
|
|
&(current->character.attributes));
|
|
|
|
/* Send character */
|
|
__guac_terminal_set(display, row, col, codepoint);
|
|
|
|
/* Mark operation as handled */
|
|
current->type = GUAC_CHAR_NOP;
|
|
|
|
}
|
|
|
|
/* Next operation */
|
|
current++;
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
void guac_terminal_display_flush(guac_terminal_display* display) {
|
|
|
|
/* Flush operations, copies first, then clears, then sets. */
|
|
__guac_terminal_display_flush_copy(display);
|
|
__guac_terminal_display_flush_clear(display);
|
|
__guac_terminal_display_flush_set(display);
|
|
|
|
/* Flush surface */
|
|
guac_common_surface_flush(display->display_surface);
|
|
|
|
}
|
|
|
|
void guac_terminal_display_dup(guac_terminal_display* display, guac_user* user,
|
|
guac_socket* socket) {
|
|
|
|
/* Create default surface */
|
|
guac_common_surface_dup(display->display_surface, user, socket);
|
|
|
|
/* Select layer is a child of the display layer */
|
|
guac_protocol_send_move(socket, display->select_layer,
|
|
display->display_layer, 0, 0, 0);
|
|
|
|
/* Offset the Default Layer to make margins even on all sides */
|
|
guac_protocol_send_move(socket, display->display_layer,
|
|
GUAC_DEFAULT_LAYER, display->margin, display->margin, 0);
|
|
|
|
/* Send select layer size */
|
|
guac_protocol_send_size(socket, display->select_layer,
|
|
display->char_width * display->width,
|
|
display->char_height * display->height);
|
|
|
|
}
|
|
|
|
void guac_terminal_display_select(guac_terminal_display* display,
|
|
int start_row, int start_col, int end_row, int end_col) {
|
|
|
|
guac_socket* socket = display->client->socket;
|
|
guac_layer* select_layer = display->select_layer;
|
|
|
|
/* Do nothing if selection is unchanged */
|
|
if (display->text_selected
|
|
&& display->selection_start_row == start_row
|
|
&& display->selection_start_column == start_col
|
|
&& display->selection_end_row == end_row
|
|
&& display->selection_end_column == end_col)
|
|
return;
|
|
|
|
/* Text is now selected */
|
|
display->text_selected = true;
|
|
|
|
display->selection_start_row = start_row;
|
|
display->selection_start_column = start_col;
|
|
display->selection_end_row = end_row;
|
|
display->selection_end_column = end_col;
|
|
|
|
/* If single row, just need one rectangle */
|
|
if (start_row == end_row) {
|
|
|
|
/* Ensure proper ordering of columns */
|
|
if (start_col > end_col) {
|
|
int temp = start_col;
|
|
start_col = end_col;
|
|
end_col = temp;
|
|
}
|
|
|
|
/* Select characters between columns */
|
|
guac_protocol_send_rect(socket, select_layer,
|
|
|
|
start_col * display->char_width,
|
|
start_row * display->char_height,
|
|
|
|
(end_col - start_col + 1) * display->char_width,
|
|
display->char_height);
|
|
|
|
}
|
|
|
|
/* Otherwise, need three */
|
|
else {
|
|
|
|
/* Ensure proper ordering of start and end coords */
|
|
if (start_row > end_row) {
|
|
|
|
int temp;
|
|
|
|
temp = start_row;
|
|
start_row = end_row;
|
|
end_row = temp;
|
|
|
|
temp = start_col;
|
|
start_col = end_col;
|
|
end_col = temp;
|
|
|
|
}
|
|
|
|
/* First row */
|
|
guac_protocol_send_rect(socket, select_layer,
|
|
|
|
start_col * display->char_width,
|
|
start_row * display->char_height,
|
|
|
|
display->width * display->char_width,
|
|
display->char_height);
|
|
|
|
/* Middle */
|
|
guac_protocol_send_rect(socket, select_layer,
|
|
|
|
0,
|
|
(start_row + 1) * display->char_height,
|
|
|
|
display->width * display->char_width,
|
|
(end_row - start_row - 1) * display->char_height);
|
|
|
|
/* Last row */
|
|
guac_protocol_send_rect(socket, select_layer,
|
|
|
|
0,
|
|
end_row * display->char_height,
|
|
|
|
(end_col + 1) * display->char_width,
|
|
display->char_height);
|
|
|
|
}
|
|
|
|
/* Draw new selection, erasing old */
|
|
guac_protocol_send_cfill(socket, GUAC_COMP_SRC, select_layer,
|
|
0x00, 0x80, 0xFF, 0x60);
|
|
|
|
}
|
|
|
|
void guac_terminal_display_clear_select(guac_terminal_display* display) {
|
|
|
|
/* Do nothing if nothing is selected */
|
|
if (!display->text_selected)
|
|
return;
|
|
|
|
guac_socket* socket = display->client->socket;
|
|
guac_layer* select_layer = display->select_layer;
|
|
|
|
guac_protocol_send_rect(socket, select_layer, 0, 0, 1, 1);
|
|
guac_protocol_send_cfill(socket, GUAC_COMP_SRC, select_layer,
|
|
0x00, 0x00, 0x00, 0x00);
|
|
|
|
/* Text is no longer selected */
|
|
display->text_selected = false;
|
|
|
|
}
|
|
|
|
int guac_terminal_display_set_font(guac_terminal_display* display,
|
|
const char* font_name, int font_size, int dpi) {
|
|
|
|
PangoFontDescription* font_desc;
|
|
|
|
/* Build off existing font description if possible */
|
|
if (display->font_desc != NULL)
|
|
font_desc = pango_font_description_copy(display->font_desc);
|
|
|
|
/* Create new font description if there is nothing to copy */
|
|
else {
|
|
font_desc = pango_font_description_new();
|
|
pango_font_description_set_weight(font_desc, PANGO_WEIGHT_NORMAL);
|
|
}
|
|
|
|
/* Optionally update font name */
|
|
if (font_name != NULL)
|
|
pango_font_description_set_family(font_desc, font_name);
|
|
|
|
/* Optionally update size */
|
|
if (font_size != -1) {
|
|
pango_font_description_set_size(font_desc,
|
|
font_size * PANGO_SCALE * dpi / 96);
|
|
}
|
|
|
|
PangoFontMap* font_map = pango_cairo_font_map_get_default();
|
|
PangoContext* context = pango_font_map_create_context(font_map);
|
|
|
|
/* Load font from font map */
|
|
PangoFont* font = pango_font_map_load_font(font_map, context, font_desc);
|
|
if (font == NULL) {
|
|
guac_client_log(display->client, GUAC_LOG_INFO, "Unable to load "
|
|
"font \"%s\"", pango_font_description_get_family(font_desc));
|
|
pango_font_description_free(font_desc);
|
|
return 1;
|
|
}
|
|
|
|
/* Get metrics from loaded font */
|
|
PangoFontMetrics* metrics = pango_font_get_metrics(font, NULL);
|
|
if (metrics == NULL) {
|
|
guac_client_log(display->client, GUAC_LOG_INFO, "Unable to get font "
|
|
"metrics for font \"%s\"",
|
|
pango_font_description_get_family(font_desc));
|
|
pango_font_description_free(font_desc);
|
|
return 1;
|
|
}
|
|
|
|
/* Save effective size of current display */
|
|
int pixel_width = display->width * display->char_width;
|
|
int pixel_height = display->height * display->char_height;
|
|
|
|
/* Calculate character dimensions using metrics */
|
|
display->char_width =
|
|
pango_font_metrics_get_approximate_digit_width(metrics) / PANGO_SCALE;
|
|
display->char_height =
|
|
(pango_font_metrics_get_descent(metrics)
|
|
+ pango_font_metrics_get_ascent(metrics)) / PANGO_SCALE;
|
|
|
|
/* Atomically replace old font description */
|
|
PangoFontDescription* old_font_desc = display->font_desc;
|
|
display->font_desc = font_desc;
|
|
pango_font_description_free(old_font_desc);
|
|
|
|
/* Recalculate dimensions which will fit within current surface */
|
|
int new_width = pixel_width / display->char_width;
|
|
int new_height = pixel_height / display->char_height;
|
|
|
|
/* Resize display if dimensions have changed */
|
|
if (new_width != display->width || new_height != display->height)
|
|
guac_terminal_display_resize(display, new_width, new_height);
|
|
|
|
|
|
return 0;
|
|
|
|
} |