X-Git-Url: https://git.stderr.nl/gitweb?p=rodin%2Fchimara.git;a=blobdiff_plain;f=libchimara%2Fstyle.c;h=a879b2c8e2b8f635f198e323aa7724e809a77e44;hp=93bf2b330baba17944747e70ffccb1085b759e65;hb=7ef4ef1fecab7ae0f724e59f7de1315a96822152;hpb=a2e82e317a6000511953c2dbc0eb1026c7b245a7 diff --git a/libchimara/style.c b/libchimara/style.c index 93bf2b3..a879b2c 100644 --- a/libchimara/style.c +++ b/libchimara/style.c @@ -1,5 +1,4 @@ #include -#include #include #include "chimara-glk-private.h" #include "glk.h" @@ -11,7 +10,7 @@ extern GPrivate *glk_data_key; static gboolean style_accept(GScanner *scanner, GTokenType token); -static gboolean style_accept_style_selector(GScanner *scanner); +static gboolean style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk); static gboolean style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag); static void style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table); static void style_table_copy(gpointer key, gpointer tag, gpointer target_table); @@ -23,9 +22,9 @@ GtkTextTag* gtk_text_tag_copy(GtkTextTag *tag); * @styl: The style to apply * * Changes the style of the current output stream. @styl should be one of the - * style_ constants listed above. However, any value is actually - * legal; if the interpreter does not recognize the style value, it will treat - * it as %style_Normal. + * style_ constants. However, any value is actually legal; if the + * interpreter does not recognize the style value, it will treat it as + * %style_Normal. * * This policy allows for the future definition of styles without breaking old * Glk libraries. @@ -98,9 +97,6 @@ style_init_textbuffer(GtkTextBuffer *buffer) g_return_if_fail(buffer != NULL); ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key); - if( G_UNLIKELY(!glk_data->style_initialized) ) { - style_init(); - } /* Copy the current text tags to the textbuffer's tag table */ g_hash_table_foreach(glk_data->current_styles->text_buffer, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer)); @@ -114,9 +110,6 @@ style_init_textgrid(GtkTextBuffer *buffer) g_return_if_fail(buffer != NULL); ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key); - if( G_UNLIKELY(!glk_data->style_initialized) ) { - style_init(); - } /* Copy the current text tags to the textgrid's tag table */ g_hash_table_foreach(glk_data->current_styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer)); @@ -141,7 +134,7 @@ style_table_copy(gpointer key, gpointer tag, gpointer target_table) } /* Internal function that copies a text tag */ -GtkTextTag* +GtkTextTag * gtk_text_tag_copy(GtkTextTag *tag) { GtkTextTag *copy; @@ -150,7 +143,7 @@ gtk_text_tag_copy(GtkTextTag *tag) copy = gtk_text_tag_new(tag->name); gtk_text_attributes_copy_values(tag->values, copy->values); - + #define _COPY_FLAG(flag) copy->flag = tag->flag _COPY_FLAG (bg_color_set); _COPY_FLAG (bg_color_set); @@ -186,18 +179,22 @@ gtk_text_tag_copy(GtkTextTag *tag) /* Internal function that reads the default styles from a CSS file */ void -style_init() +style_init(ChimaraGlk *glk) { - ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key); + CHIMARA_GLK_USE_PRIVATE(glk, priv); + GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); GHashTable *current_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); GHashTable *current_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); GtkTextTag *tag; + PangoFontDescription *default_font_desc = pango_font_description_from_string("Serif"); + PangoFontDescription *monospace_font_desc = pango_font_description_from_string("Monospace"); + /* Initialise the default styles for a text grid */ tag = gtk_text_tag_new("normal"); - g_object_set(tag, "font-desc", glk_data->monospace_font_desc, NULL); + g_object_set(tag, "font-desc", monospace_font_desc, NULL); g_hash_table_insert(default_text_grid_styles, "normal", tag); tag = gtk_text_tag_new("emphasized"); @@ -205,7 +202,7 @@ style_init() g_hash_table_insert(default_text_grid_styles, "emphasized", tag); tag = gtk_text_tag_new("preformatted"); - g_object_set(tag, "font-desc", glk_data->monospace_font_desc, NULL); + g_object_set(tag, "font-desc", monospace_font_desc, NULL); g_hash_table_insert(default_text_grid_styles, "preformatted", tag); tag = gtk_text_tag_new("header"); @@ -238,7 +235,7 @@ style_init() /* Tags for the textbuffer */ tag = gtk_text_tag_new("normal"); - g_object_set(tag, "font-desc", glk_data->default_font_desc, NULL); + g_object_set(tag, "font-desc", default_font_desc, NULL); g_hash_table_insert(default_text_buffer_styles, "normal", tag); tag = gtk_text_tag_new("emphasized"); @@ -246,7 +243,7 @@ style_init() g_hash_table_insert(default_text_buffer_styles, "emphasized", tag); tag = gtk_text_tag_new("preformatted"); - g_object_set(tag, "font-desc", glk_data->monospace_font_desc, NULL); + g_object_set(tag, "font-desc", monospace_font_desc, NULL); g_hash_table_insert(default_text_buffer_styles, "preformatted", tag); tag = gtk_text_tag_new("header"); @@ -281,43 +278,60 @@ style_init() g_object_set(pager_tag, "foreground", "#ffffff", "background", "#000000", NULL); g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag); - glk_data->default_styles->text_grid = default_text_grid_styles; - glk_data->default_styles->text_buffer = default_text_buffer_styles; + pango_font_description_free(default_font_desc); + pango_font_description_free(monospace_font_desc); + + priv->default_styles->text_grid = default_text_grid_styles; + priv->default_styles->text_buffer = default_text_buffer_styles; + priv->current_styles->text_grid = current_text_grid_styles; + priv->current_styles->text_buffer = current_text_buffer_styles; - /* Create the CSS file scanner */ - GScanner *scanner = g_scanner_new(NULL); + /* Set the current style to a copy of the default style */ + copy_default_styles_to_current_styles(glk); - int f = open(glk_data->css_file, O_RDONLY); - if(f != -1) - { - g_scanner_input_file(scanner, f); - scanner->input_name = glk_data->css_file; - scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#"; - scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS; - scanner->config->symbol_2_token = TRUE; - scanner->config->cpair_comment_single = NULL; - scanner->config->scan_float = FALSE; - - /* Run the scanner over the CSS file, overriding defaults */ - while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) { - if( !style_accept_style_selector(scanner) ) - break; - } + text_tag_to_attr_list(pager_tag, priv->pager_attr_list); +} - g_scanner_destroy(scanner); - } - else - g_warning("Could not find CSS file"); +/* Reset style tables to the library's internal defaults */ +void +reset_default_styles(ChimaraGlk *glk) +{ + /* TODO: write this function */ +} - /* Set the current style to a copy of the default style */ - g_hash_table_foreach(default_text_grid_styles, style_table_copy, current_text_grid_styles); - g_hash_table_foreach(default_text_buffer_styles, style_table_copy, current_text_buffer_styles); - glk_data->current_styles->text_grid = current_text_grid_styles; - glk_data->current_styles->text_buffer = current_text_buffer_styles; +/* Copy the default styles to the current styles + FIXME: This function is temporary and will not be needed later on */ +void +copy_default_styles_to_current_styles(ChimaraGlk *glk) +{ + CHIMARA_GLK_USE_PRIVATE(glk, priv); + g_hash_table_foreach(priv->default_styles->text_grid, style_table_copy, priv->current_styles->text_grid); + g_hash_table_foreach(priv->default_styles->text_buffer, style_table_copy, priv->current_styles->text_buffer); +} - text_tag_to_attr_list(pager_tag, glk_data->pager_attr_list); +/* Create the CSS file scanner */ +GScanner * +create_css_file_scanner(void) +{ + GScanner *scanner = g_scanner_new(NULL); + scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#"; + scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS; + scanner->config->symbol_2_token = TRUE; + scanner->config->cpair_comment_single = NULL; + scanner->config->scan_float = FALSE; + return scanner; +} + +/* Run the scanner over the CSS file, overriding the default styles */ +void +scan_css_file(GScanner *scanner, ChimaraGlk *glk) +{ + while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) { + if( !style_accept_style_selector(scanner, glk) ) + break; + } - glk_data->style_initialized = TRUE; + g_scanner_destroy(scanner); } /* Internal function: parses a token */ @@ -325,19 +339,18 @@ static gboolean style_accept(GScanner *scanner, GTokenType token) { GTokenType next = g_scanner_get_next_token(scanner); - if(next != token ) { + if(next != token) { g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1); return FALSE; - } else { - return TRUE; } + return TRUE; } /* Internal function: parses a style selector */ static gboolean -style_accept_style_selector(GScanner *scanner) +style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk) { - ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key); + CHIMARA_GLK_USE_PRIVATE(glk, priv); GtkTextTag *current_tag; gchar *field; @@ -366,9 +379,9 @@ style_accept_style_selector(GScanner *scanner) } if( !strcmp(field, "buffer") ) - current_tag = g_hash_table_lookup(glk_data->default_styles->text_buffer, value.v_identifier); + current_tag = g_hash_table_lookup(priv->default_styles->text_buffer, value.v_identifier); else - current_tag = g_hash_table_lookup(glk_data->default_styles->text_grid, value.v_identifier); + current_tag = g_hash_table_lookup(priv->default_styles->text_grid, value.v_identifier); if(current_tag == NULL) { g_scanner_error(scanner, "CSS Error: invalid style identifier"); @@ -561,7 +574,7 @@ gdkcolor_to_glkcolor(GdkColor *color) /* Internal function: changes a GTK tag to correspond with the given style. */ static void -apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val) +apply_stylehint_to_tag(GtkTextTag *tag, glui32 wintype, glui32 hint, glsi32 val) { g_return_if_fail(tag != NULL); @@ -614,7 +627,15 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val) break; case stylehint_Proportional: - g_object_set(tag_object, "font-desc", val ? glk_data->default_font_desc : glk_data->monospace_font_desc, NULL); + { + gchar *font_family; + GtkTextTag *font_tag = g_hash_table_lookup( + wintype == wintype_TextBuffer? glk_data->default_styles->text_buffer : glk_data->default_styles->text_grid, + val? "normal" : "preformatted"); + g_object_get(font_tag, "family", &font_family, NULL); + g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL); + g_free(font_family); + } break; case stylehint_TextColor: @@ -668,12 +689,12 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val) WARNING("Unknown style hint"); } } -/*Internal function: queries a text tag for the value of a given style hint */ + +/* Internal function: queries a text tag for the value of a given style hint */ static gint -query_tag(GtkTextTag *tag, glui32 hint) +query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint) { gint intval; - GObject *objval; GdkColor *colval; g_return_val_if_fail(tag != NULL, 0); @@ -684,64 +705,65 @@ query_tag(GtkTextTag *tag, glui32 hint) case stylehint_Indentation: g_object_get(tag, "left_margin", &intval, NULL); return intval/5; - break; case stylehint_ParaIndentation: g_object_get(tag, "indent", &intval, NULL); return intval/5; - break; case stylehint_Justification: g_object_get(tag, "justification", &intval, NULL); switch(intval) { - case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush; break; - case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight; break; - case GTK_JUSTIFY_CENTER: return stylehint_just_Centered; break; - case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush; break; + case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush; + case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight; + case GTK_JUSTIFY_CENTER: return stylehint_just_Centered; + case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush; default: WARNING("Unknown justification"); return stylehint_just_LeftFlush; } - break; case stylehint_Weight: g_object_get(tag, "weight", &intval, NULL); switch(intval) { - case PANGO_WEIGHT_LIGHT: return -1; break; - case PANGO_WEIGHT_NORMAL: return 0; break; - case PANGO_WEIGHT_BOLD: return 1; break; + case PANGO_WEIGHT_LIGHT: return -1; + case PANGO_WEIGHT_NORMAL: return 0; + case PANGO_WEIGHT_BOLD: return 1; default: WARNING("Unknown font weight"); return 0; } - break; case stylehint_Size: g_object_get(tag, "size", &intval, NULL); return (intval/2)-14; - break; case stylehint_Oblique: g_object_get(tag, "style", &intval , NULL); return intval == PANGO_STYLE_ITALIC ? 1 : 0; - break; case stylehint_Proportional: - g_object_get(tag, "font-desc", &objval, NULL); - return objval == (GObject *)glk_data->monospace_font_desc ? 0 : 1; - break; + /* Use pango_font_family_is_monospace()? */ + { + gchar *font_family, *query_font_family; + GtkTextTag *font_tag = g_hash_table_lookup( + wintype == wintype_TextBuffer? glk_data->default_styles->text_buffer : glk_data->default_styles->text_grid, + "preformatted"); + g_object_get(font_tag, "family", &font_family, NULL); + g_object_get(tag, "family", &query_font_family, NULL); + gint retval = strcmp(font_family, query_font_family)? 0 : 1; + g_free(font_family); + g_free(query_font_family); + return retval; + } case stylehint_TextColor: g_object_get(tag, "foreground-gdk", &colval, NULL); return gdkcolor_to_glkcolor(colval); - break; case stylehint_BackColor: g_object_get(tag, "background-gdk", &colval, NULL); return gdkcolor_to_glkcolor(colval); - break; case stylehint_ReverseColor: return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") ); - break; default: WARNING("Unknown style hint"); @@ -758,7 +780,7 @@ query_tag(GtkTextTag *tag, glui32 hint) * @val: The style hint. The meaning of this depends on @hint. * * Sets a hint about the appearance of one style for a particular type of - * window. You can also set wintype to %wintype_AllTypes, which sets a hint for + * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for * all types of window. * * There is no equivalent constant to set a hint for all styles of a single @@ -770,19 +792,15 @@ glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val) { ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key); - if( G_UNLIKELY(!glk_data->style_initialized) ) { - style_init(); - } - GtkTextTag *to_change; if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) { to_change = g_hash_table_lookup( glk_data->current_styles->text_buffer, get_tag_name(styl) ); - apply_stylehint_to_tag(to_change, hint, val); + apply_stylehint_to_tag(to_change, wintype_TextBuffer, hint, val); } if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) { to_change = g_hash_table_lookup( glk_data->current_styles->text_grid, get_tag_name(styl) ); - apply_stylehint_to_tag(to_change, hint, val); + apply_stylehint_to_tag(to_change, wintype_TextGrid, hint, val); } } @@ -792,9 +810,9 @@ glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val) * @styl: The style to set a hint for. * @hint: The type of style hint, one of the stylehint_ constants. * - * Resets a hint about the appearance of one style for a particular type of - * window to it's default value. You can also set wintype to %wintype_AllTypes, which resets a hint for - * all types of window. + * Clears a hint about the appearance of one style for a particular type of + * window to its default value. You can also set @wintype to %wintype_AllTypes, + * which clears a hint for all types of window. * * There is no equivalent constant to reset a hint for all styles of a single * window type. @@ -809,11 +827,11 @@ glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint) switch(wintype) { case wintype_TextBuffer: tag = g_hash_table_lookup( glk_data->default_styles->text_buffer, get_tag_name(styl) ); - glk_stylehint_set( wintype, styl, hint, query_tag(tag, hint) ); + glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) ); break; case wintype_TextGrid: tag = g_hash_table_lookup( glk_data->default_styles->text_grid, get_tag_name(styl) ); - glk_stylehint_set( wintype, styl, hint, query_tag(tag, hint) ); + glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) ); default: return; } @@ -823,14 +841,22 @@ glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint) * glk_style_distinguish: * @win: The window in which the styles are to be distinguished. * @styl1: The first style to be distinguished from the second style. - * @styl2: The second styel to be distinguished from the first style. + * @styl2: The second style to be distinguished from the first style. + * + * Decides whether two styles are visually distinguishable in the given window. + * The exact meaning of this is left for the library to determine. + * Chimara + * Currently, all styles of one window are assumed to be mutually + * distinguishable. + * * - * Returns: TRUE if the two styles are visually distinguishable in the given window. - * If they are not, it returns FALSE. + * Returns: %TRUE (1) if the two styles are visually distinguishable. If they + * are not, it returns %FALSE (0). */ glui32 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2) { + /* FIXME */ return styl1 != styl2; } @@ -841,8 +867,67 @@ glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2) * @hint: The stylehint to measure. * @result: Address to write the result to. * - * This function can be used to query the current value of a particular style hint. - * Returns: TRUE upon successul retrievel, otherwise FALSE. + * Tries to test an attribute of one style in the given window @win. The library + * may not be able to determine the attribute; if not, this returns %FALSE (0). + * If it can, it returns %TRUE (1) and stores the value in the location pointed + * at by @result. + * + * As usual, it is legal for @result to be %NULL, although fairly pointless. + * + * + * The meaning of the value depends on the hint which was tested: + * + * + * %stylehint_Indentation, %stylehint_ParaIndentation + * The indentation and paragraph indentation. These are in a + * metric which is platform-dependent. + * Most likely either characters or pixels. + * + * + * + * %stylehint_Justification + * One of the constants %stylehint_just_LeftFlush, + * %stylehint_just_LeftRight, %stylehint_just_Centered, or + * %stylehint_just_RightFlush. + * + * + * %stylehint_Size + * The font size. Again, this is in a platform-dependent + * metric. + * Pixels, points, or simply 1 if the library does not support + * varying font sizes. + * + * + * + * %stylehint_Weight + * 1 for heavy-weight fonts (boldface), 0 for normal weight, + * and -1 for light-weight fonts. + * + * + * %stylehint_Oblique + * 1 for oblique fonts (italic), or 0 for normal angle. + * + * + * + * %stylehint_Proportional + * 1 for proportional-width fonts, or 0 for fixed-width. + * + * + * + * %stylehint_TextColor, %stylehint_BackColor + * These are values from 0x00000000 to 0x00FFFFFF, encoded as + * described in Suggesting the + * Appearance of Styles. + * + * + * %stylehint_ReverseColor + * 0 for normal printing, 1 if the foreground and background + * colors are reversed. + * + * + * + * Returns: TRUE upon successul retrieval, otherwise FALSE. */ glui32 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result) @@ -853,11 +938,13 @@ glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result) switch(win->type) { case wintype_TextBuffer: tag = g_hash_table_lookup( glk_data->current_styles->text_buffer, get_tag_name(styl) ); - *result = query_tag(tag, hint); + if(result) + *result = query_tag(tag, win->type, hint); break; case wintype_TextGrid: tag = g_hash_table_lookup( glk_data->current_styles->text_grid, get_tag_name(styl) ); - *result = query_tag(tag, hint); + if(result) + *result = query_tag(tag, win->type, hint); default: return FALSE; } @@ -868,16 +955,12 @@ glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result) /* Internal function returning the current default font for a window type * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are * supported for now */ -PangoFontDescription* +PangoFontDescription * get_current_font(guint32 wintype) { ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key); GtkTextTag *normal; - if( G_UNLIKELY(!glk_data->style_initialized) ) { - style_init(); - } - switch(wintype) { case wintype_TextGrid: normal = g_hash_table_lookup(glk_data->current_styles->text_grid, "normal");