diff --git a/src/terminal/Makefile.am b/src/terminal/Makefile.am index 9fce9dc5..a886479e 100644 --- a/src/terminal/Makefile.am +++ b/src/terminal/Makefile.am @@ -32,6 +32,7 @@ noinst_HEADERS = \ terminal/buffer.h \ terminal/char_mappings.h \ terminal/common.h \ + terminal/color-scheme.h \ terminal/display.h \ terminal/named-colors.h \ terminal/palette.h \ @@ -46,6 +47,7 @@ noinst_HEADERS = \ libguac_terminal_la_SOURCES = \ buffer.c \ char_mappings.c \ + color-scheme.c \ common.c \ display.c \ named-colors.c \ diff --git a/src/terminal/color-scheme.c b/src/terminal/color-scheme.c new file mode 100644 index 00000000..2799aac9 --- /dev/null +++ b/src/terminal/color-scheme.c @@ -0,0 +1,251 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +#include "config.h" + +#include "terminal/color-scheme.h" +#include "terminal/palette.h" +#include "terminal/xparsecolor.h" + +#include +#include +#include +#include + +#include + +/** + * Compare a non-null-terminated string to a null-terminated literal, in the + * same manner as strcmp(). + * + * @param str_start + * Start of the non-null-terminated string. + * + * @param str_end + * End of the non-null-terminated string, after the last character. + * + * @param literal + * The null-terminated literal to compare against. + * + * @return + * Zero if the two strings are equal and non-zero otherwise. + */ +static int guac_terminal_color_scheme_compare_token(const char* str_start, + const char* str_end, const char* literal) { + + const int result = strncmp(literal, str_start, str_end - str_start); + if (result != 0) + return result; + + /* At this point, literal is same length or longer than + * | str_end - str_start |, so if the two are equal, literal should + * have its null-terminator at | str_end - str_start |. */ + return (int) (unsigned char) literal[str_end - str_start]; +} + +/** + * Strip the leading and trailing spaces of a bounded string. + * + * @param[in,out] str_start + * Address of a pointer to the start of the string. On return, the pointer + * is advanced to after any leading spaces. + * + * @param[in,out] str_end + * Address of a pointer to the end of the string, after the last character. + * On return, the pointer is moved back to before any trailing spaces. + */ +static void guac_terminal_color_scheme_strip_spaces(const char** str_start, + const char** str_end) { + + /* Strip leading spaces. */ + while (*str_start < *str_end && isspace(**str_start)) + (*str_start)++; + + /* Strip trailing spaces. */ + while (*str_end > *str_start && isspace(*(*str_end - 1))) + (*str_end)--; +} + +/** + * Parse the name part of the name-value pair within the color-scheme + * configuration. + * + * @param client + * The client that the terminal is connected to. + * + * @param name_start + * Start of the name string. + * + * @param name_end + * End of the name string, after the last character. + * + * @param foreground + * Pointer to the foreground color. + * + * @param background + * Pointer to the background color. + * + * @param palette + * Pointer to the palette array. + * + * @param[out] target + * On return, pointer to the color struct that corresponds to the name. + * + * @return + * Zero if successful or non-zero otherwise. + */ +static int guac_terminal_parse_color_scheme_name(guac_client* client, + const char* name_start, const char* name_end, + guac_terminal_color* foreground, guac_terminal_color* background, + guac_terminal_color (*palette)[256], + guac_terminal_color** target) { + + guac_terminal_color_scheme_strip_spaces(&name_start, &name_end); + + if (!guac_terminal_color_scheme_compare_token( + name_start, name_end, GUAC_TERMINAL_SCHEME_FOREGROUND)) { + *target = foreground; + return 0; + } + + if (!guac_terminal_color_scheme_compare_token( + name_start, name_end, GUAC_TERMINAL_SCHEME_BACKGROUND)) { + *target = background; + return 0; + } + + /* Parse color value. */ + int index = -1; + if (sscanf(name_start, GUAC_TERMINAL_SCHEME_NUMBERED "%d", &index) && + index >= 0 && index <= 255) { + *target = &(*palette)[index]; + return 0; + } + + guac_client_log(client, GUAC_LOG_WARNING, + "Unknown color name: \"%.*s\".", + name_end - name_start, name_start); + return 1; +} + +/** + * Parse the value part of the name-value pair within the color-scheme + * configuration. + * + * @param client + * The client that the terminal is connected to. + * + * @param value_start + * Start of the value string. + * + * @param value_end + * End of the value string, after the last character. + * + * @param palette + * The current color palette. + * + * @param[out] target + * On return, the parsed color. + * + * @return + * Zero if successful or non-zero otherwise. + */ +static int guac_terminal_parse_color_scheme_value(guac_client* client, + const char* value_start, const char* value_end, + const guac_terminal_color (*palette)[256], + guac_terminal_color* target) { + + guac_terminal_color_scheme_strip_spaces(&value_start, &value_end); + + /* Parse color value. */ + int index = -1; + if (sscanf(value_start, GUAC_TERMINAL_SCHEME_NUMBERED "%d", &index) && + index >= 0 && index <= 255) { + *target = (*palette)[index]; + return 0; + } + + /* Parse X11 value. */ + if (!guac_terminal_xparsecolor(value_start, target)) + return 0; + + guac_client_log(client, GUAC_LOG_WARNING, + "Invalid color value: \"%.*s\".", + value_end - value_start, value_start); + return 1; +} + +void guac_terminal_parse_color_scheme(guac_client* client, + const char* color_scheme, guac_terminal_color* foreground, + guac_terminal_color* background, + guac_terminal_color (*palette)[256]) { + + /* Set default gray-black color scheme and initial palette. */ + *foreground = GUAC_TERMINAL_INITIAL_PALETTE[GUAC_TERMINAL_COLOR_GRAY]; + *background = GUAC_TERMINAL_INITIAL_PALETTE[GUAC_TERMINAL_COLOR_BLACK]; + memcpy(palette, GUAC_TERMINAL_INITIAL_PALETTE, + sizeof(GUAC_TERMINAL_INITIAL_PALETTE)); + + /* Current char being parsed, or NULL if at end of parsing. */ + const char* cursor = color_scheme; + + while (cursor) { + /* Start of the current "name: value" pair. */ + const char* pair_start = cursor; + + /* End of the current name-value pair. */ + const char* pair_end = strchr(pair_start, ';'); + if (pair_end) { + cursor = pair_end + 1; + } + else { + pair_end = pair_start + strlen(pair_start); + cursor = NULL; + } + + guac_terminal_color_scheme_strip_spaces(&pair_start, &pair_end); + if (pair_start >= pair_end) + /* Allow empty pairs, which happens, e.g., when the configuration + * string ends in a semi-colon. */ + continue; + + /* End of the name part of the pair. */ + const char* name_end = memchr(pair_start, ':', pair_end - pair_start); + if (name_end == NULL) { + guac_client_log(client, GUAC_LOG_WARNING, + "Expecting colon: \"%.*s\".", + pair_end - pair_start, pair_start); + return; + } + + /* The color that the name corresponds to. */ + guac_terminal_color* color_target = NULL; + + if (guac_terminal_parse_color_scheme_name( + client, pair_start, name_end, foreground, background, + palette, &color_target)) + return; /* Parsing failed. */ + + if (guac_terminal_parse_color_scheme_value( + client, name_end + 1, pair_end, + (const guac_terminal_color(*)[256]) palette, color_target)) + return; /* Parsing failed. */ + } +} + diff --git a/src/terminal/terminal.c b/src/terminal/terminal.c index 95e945d8..a99bfb05 100644 --- a/src/terminal/terminal.c +++ b/src/terminal/terminal.c @@ -22,6 +22,7 @@ #include "common/clipboard.h" #include "common/cursor.h" #include "terminal/buffer.h" +#include "terminal/color-scheme.h" #include "terminal/common.h" #include "terminal/display.h" #include "terminal/palette.h" @@ -30,7 +31,6 @@ #include "terminal/terminal_handlers.h" #include "terminal/types.h" #include "terminal/typescript.h" -#include "terminal/xparsecolor.h" #include #include @@ -305,247 +305,6 @@ void* guac_terminal_thread(void* data) { } -/** - * Compare a non-null-terminated string to a null-terminated literal, in the - * same manner as strcmp(). - * - * @param str_start - * Start of the non-null-terminated string. - * - * @param str_end - * End of the non-null-terminated string, after the last character. - * - * @param literal - * The null-terminated literal to compare against. - * - * @return - * Zero if the two strings are equal and non-zero otherwise. - */ -static int guac_terminal_color_scheme_compare_token(const char* str_start, - const char* str_end, const char* literal) { - - const int result = strncmp(literal, str_start, str_end - str_start); - if (result != 0) - return result; - - /* At this point, literal is same length or longer than - * | str_end - str_start |, so if the two are equal, literal should - * have its null-terminator at | str_end - str_start |. */ - return (int) (unsigned char) literal[str_end - str_start]; -} - -/** - * Strip the leading and trailing spaces of a bounded string. - * - * @param[in,out] str_start - * Address of a pointer to the start of the string. On return, the pointer - * is advanced to after any leading spaces. - * - * @param[in,out] str_end - * Address of a pointer to the end of the string, after the last character. - * On return, the pointer is moved back to before any trailing spaces. - */ -static void guac_terminal_color_scheme_strip_spaces(const char** str_start, - const char** str_end) { - - /* Strip leading spaces. */ - while (*str_start < *str_end && isspace(**str_start)) - (*str_start)++; - - /* Strip trailing spaces. */ - while (*str_end > *str_start && isspace(*(*str_end - 1))) - (*str_end)--; -} - -/** - * Parse the name part of the name-value pair within the color-scheme - * configuration. - * - * @param client - * The client that the terminal is connected to. - * - * @param name_start - * Start of the name string. - * - * @param name_end - * End of the name string, after the last character. - * - * @param foreground - * Pointer to the foreground color. - * - * @param background - * Pointer to the background color. - * - * @param palette - * Pointer to the palette array. - * - * @param[out] target - * On return, pointer to the color struct that corresponds to the name. - * - * @return - * Zero if successful or non-zero otherwise. - */ -static int guac_terminal_parse_color_scheme_name(guac_client* client, - const char* name_start, const char* name_end, - guac_terminal_color* foreground, guac_terminal_color* background, - guac_terminal_color (*palette)[256], - guac_terminal_color** target) { - - guac_terminal_color_scheme_strip_spaces(&name_start, &name_end); - - if (!guac_terminal_color_scheme_compare_token( - name_start, name_end, GUAC_TERMINAL_SCHEME_FOREGROUND)) { - *target = foreground; - return 0; - } - - if (!guac_terminal_color_scheme_compare_token( - name_start, name_end, GUAC_TERMINAL_SCHEME_BACKGROUND)) { - *target = background; - return 0; - } - - /* Parse color value. */ - int index = -1; - if (sscanf(name_start, GUAC_TERMINAL_SCHEME_NUMBERED "%d", &index) && - index >= 0 && index <= 255) { - *target = &(*palette)[index]; - return 0; - } - - guac_client_log(client, GUAC_LOG_WARNING, - "Unknown color name: \"%.*s\".", - name_end - name_start, name_start); - return 1; -} - -/** - * Parse the value part of the name-value pair within the color-scheme - * configuration. - * - * @param client - * The client that the terminal is connected to. - * - * @param value_start - * Start of the value string. - * - * @param value_end - * End of the value string, after the last character. - * - * @param palette - * The current color palette. - * - * @param[out] target - * On return, the parsed color. - * - * @return - * Zero if successful or non-zero otherwise. - */ -static int guac_terminal_parse_color_scheme_value(guac_client* client, - const char* value_start, const char* value_end, - const guac_terminal_color (*palette)[256], - guac_terminal_color* target) { - - guac_terminal_color_scheme_strip_spaces(&value_start, &value_end); - - /* Parse color value. */ - int index = -1; - if (sscanf(value_start, GUAC_TERMINAL_SCHEME_NUMBERED "%d", &index) && - index >= 0 && index <= 255) { - *target = (*palette)[index]; - return 0; - } - - /* Parse X11 value. */ - if (!guac_terminal_xparsecolor(value_start, target)) - return 0; - - guac_client_log(client, GUAC_LOG_WARNING, - "Invalid color value: \"%.*s\".", - value_end - value_start, value_start); - return 1; -} - -/** - * Parse a color-scheme configuration string, and return specified - * foreground/background colors and color palette. - * - * @param client - * The client that the terminal is connected to. - * - * @param color_scheme - * A semicolon-separated list of name-value pairs, i.e. - * ": [; : [; ...]]". - * For example, "color2: rgb:cc/33/22; background: color5". - * - * @param[out] foreground - * Parsed foreground color. - * - * @param[out] background - * Parsed background color. - * - * @param[in,out] palette - * Parsed color palette. The caller is responsible for allocating a mutable - * array on entry. On return, the array contains the parsed palette. - */ -static void guac_terminal_parse_color_scheme(guac_client* client, - const char* color_scheme, guac_terminal_color* foreground, - guac_terminal_color* background, - guac_terminal_color (*palette)[256]) { - - /* Set default gray-black color scheme and initial palette. */ - *foreground = GUAC_TERMINAL_INITIAL_PALETTE[GUAC_TERMINAL_COLOR_GRAY]; - *background = GUAC_TERMINAL_INITIAL_PALETTE[GUAC_TERMINAL_COLOR_BLACK]; - memcpy(palette, GUAC_TERMINAL_INITIAL_PALETTE, - sizeof(GUAC_TERMINAL_INITIAL_PALETTE)); - - /* Current char being parsed, or NULL if at end of parsing. */ - const char* cursor = color_scheme; - - while (cursor) { - /* Start of the current "name: value" pair. */ - const char* pair_start = cursor; - - /* End of the current name-value pair. */ - const char* pair_end = strchr(pair_start, ';'); - if (pair_end) { - cursor = pair_end + 1; - } - else { - pair_end = pair_start + strlen(pair_start); - cursor = NULL; - } - - guac_terminal_color_scheme_strip_spaces(&pair_start, &pair_end); - if (pair_start >= pair_end) - /* Allow empty pairs, which happens, e.g., when the configuration - * string ends in a semi-colon. */ - continue; - - /* End of the name part of the pair. */ - const char* name_end = memchr(pair_start, ':', pair_end - pair_start); - if (name_end == NULL) { - guac_client_log(client, GUAC_LOG_WARNING, - "Expecting colon: \"%.*s\".", - pair_end - pair_start, pair_start); - return; - } - - /* The color that the name corresponds to. */ - guac_terminal_color* color_target = NULL; - - if (guac_terminal_parse_color_scheme_name( - client, pair_start, name_end, foreground, background, - palette, &color_target)) - return; /* Parsing failed. */ - - if (guac_terminal_parse_color_scheme_value( - client, name_end + 1, pair_end, - (const guac_terminal_color(*)[256]) palette, color_target)) - return; /* Parsing failed. */ - } -} - guac_terminal* guac_terminal_create(guac_client* client, guac_common_clipboard* clipboard, int max_scrollback, const char* font_name, int font_size, int dpi, diff --git a/src/terminal/terminal/color-scheme.h b/src/terminal/terminal/color-scheme.h new file mode 100644 index 00000000..962d820d --- /dev/null +++ b/src/terminal/terminal/color-scheme.h @@ -0,0 +1,95 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +#ifndef GUAC_TERMINAL_COLOR_SCHEME_H +#define GUAC_TERMINAL_COLOR_SCHEME_H + +#include "config.h" + +#include "terminal/palette.h" + +#include + +#include +#include + +/** + * The name of the color scheme having black foreground and white background. + */ +#define GUAC_TERMINAL_SCHEME_BLACK_WHITE "black-white" + +/** + * The name of the color scheme having gray foreground and black background. + */ +#define GUAC_TERMINAL_SCHEME_GRAY_BLACK "gray-black" + +/** + * The name of the color scheme having green foreground and black background. + */ +#define GUAC_TERMINAL_SCHEME_GREEN_BLACK "green-black" + +/** + * The name of the color scheme having white foreground and black background. + */ +#define GUAC_TERMINAL_SCHEME_WHITE_BLACK "white-black" + +/** + * Color name representing the foreground color. + */ +#define GUAC_TERMINAL_SCHEME_FOREGROUND "foreground" + +/** + * Color name representing the background color. + */ +#define GUAC_TERMINAL_SCHEME_BACKGROUND "background" + +/** + * Color name representing a numbered color. + */ +#define GUAC_TERMINAL_SCHEME_NUMBERED "color" + +/** + * Parse a color-scheme configuration string, and return specified + * foreground/background colors and color palette. + * + * @param client + * The client that the terminal is connected to. + * + * @param color_scheme + * A semicolon-separated list of name-value pairs, i.e. + * ": [; : [; ...]]". + * For example, "color2: rgb:cc/33/22; background: color5". + * + * @param[out] foreground + * Parsed foreground color. + * + * @param[out] background + * Parsed background color. + * + * @param[in,out] palette + * Parsed color palette. The caller is responsible for allocating a mutable + * array on entry. On return, the array contains the parsed palette. + */ +void guac_terminal_parse_color_scheme(guac_client* client, + const char* color_scheme, guac_terminal_color* foreground, + guac_terminal_color* background, + guac_terminal_color (*palette)[256]); + +#endif + diff --git a/src/terminal/terminal/terminal.h b/src/terminal/terminal/terminal.h index 08094baa..aee7742c 100644 --- a/src/terminal/terminal/terminal.h +++ b/src/terminal/terminal/terminal.h @@ -69,41 +69,6 @@ */ #define GUAC_TERMINAL_WHEEL_SCROLL_AMOUNT 3 -/** - * The name of the color scheme having black foreground and white background. - */ -#define GUAC_TERMINAL_SCHEME_BLACK_WHITE "black-white" - -/** - * The name of the color scheme having gray foreground and black background. - */ -#define GUAC_TERMINAL_SCHEME_GRAY_BLACK "gray-black" - -/** - * The name of the color scheme having green foreground and black background. - */ -#define GUAC_TERMINAL_SCHEME_GREEN_BLACK "green-black" - -/** - * The name of the color scheme having white foreground and black background. - */ -#define GUAC_TERMINAL_SCHEME_WHITE_BLACK "white-black" - -/** - * Color name representing the foreground color. - */ -#define GUAC_TERMINAL_SCHEME_FOREGROUND "foreground" - -/** - * Color name representing the background color. - */ -#define GUAC_TERMINAL_SCHEME_BACKGROUND "background" - -/** - * Color name representing a numbered color. - */ -#define GUAC_TERMINAL_SCHEME_NUMBERED "color" - /** * Flag which specifies that terminal output should be sent to both the current * pipe stream and the user's display. By default, terminal output will be sent