C++ pango_attr_list_new函数代码示例

static void create_cursor_attr()
{
    if (attr_list)
        pango_attr_list_unref(attr_list);

    GdkColor color_bg, color_fg;
    if (hime_win_color_use)
        gdk_color_parse(tsin_cursor_color, &color_bg);
    else
        gdk_color_parse(TSIN_CURSOR_COLOR_DEFAULT, &color_bg);
    gdk_color_parse("white", &color_fg);

    attr_list = pango_attr_list_new ();
    attr_list_blank = pango_attr_list_new ();

    PangoAttribute *blue_bg = pango_attr_background_new(
                                  color_bg.red, color_bg.green, color_bg.blue);
    blue_bg->start_index = 0;
    blue_bg->end_index = 128;
    pango_attr_list_insert (attr_list, blue_bg);

    PangoAttribute *white_fg = pango_attr_foreground_new(
                                   color_fg.red, color_fg.green, color_fg.blue);
    white_fg->start_index = 0;
    white_fg->end_index = 128;
    pango_attr_list_insert (attr_list, white_fg);
}

PangoAttrList *
ms_container_read_markup (MSContainer const *c,
			  guint8 const *data, size_t txo_len,
			  char const *str)
{
	TXORun txo_run;
	size_t str_len;

	XL_CHECK_CONDITION_VAL (txo_len >= 16,
				pango_attr_list_new ()); /* min two records */

	str_len = g_utf8_strlen (str, -1);

	txo_run.last = G_MAXINT;
	txo_run.accum = NULL;
	for (txo_len -= 16 ; (gssize)txo_len >= 0 ; txo_len -= 8) {
		guint16 o = GSF_LE_GET_GUINT16 (data + txo_len);
		guint16 idx = GSF_LE_GET_GUINT16 (data + txo_len + 2);

		XL_CHECK_CONDITION_VAL (o <= str_len, txo_run.accum);
		txo_run.first = g_utf8_offset_to_pointer (str, o) - str;
		XL_CHECK_CONDITION_VAL (txo_run.first < txo_run.last, txo_run.accum);

		if (idx != 0) {
			if (!txo_run.accum)
				txo_run.accum = pango_attr_list_new ();
			pango_attr_list_filter
				(ms_container_get_markup (c, idx),
				 (PangoAttrFilterFunc) append_txorun,
				 &txo_run);
		}
		txo_run.last = txo_run.first;
	}
	return txo_run.accum;
}

static GtkWidget *app_window_common(void)
{
	GtkWidget *window;
	PangoAttrList *attr;

	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_container_set_border_width(GTK_CONTAINER(window), 10);
	gtk_window_set_title(GTK_WINDOW(window), WINDOW_TITLE);

	g_signal_connect(window, "delete-event", G_CALLBACK(delete_event),
			 NULL);

	tokencode_text = gtk_label_new(NULL);
	attr = pango_attr_list_new();
	pango_attr_list_insert(attr, pango_attr_scale_new(PANGO_SCALE_XX_LARGE));
	pango_attr_list_insert(attr, pango_attr_weight_new(PANGO_WEIGHT_BOLD));
	gtk_label_set_attributes(GTK_LABEL(tokencode_text), attr);
	pango_attr_list_unref(attr);

	/* hack to turn off progress bar animation seen on some themes */
	gtk_rc_parse_string("style \"default\" { engine \"\" { }\n"
		"bg[PRELIGHT] = \"#4b6785\" }\n"
		"widget_class \"*.<GtkProgressBar>\" style \"default\"");

	return window;
}

/**
 * wbcg_edit_add_markup:
 * @wbcg: #WBCGtk
 * @attr: #PangoAttribute
 *
 * Absorbs the ref to @attr.
 **/
void
wbcg_edit_add_markup (WBCGtk *wbcg, PangoAttribute *attr)
{
	GObject *entry = (GObject *)wbcg_get_entry (wbcg);
	if (wbcg->edit_line.full_content == NULL)
		wbcg_edit_init_markup (wbcg, pango_attr_list_new ());

	if (gtk_editable_get_selection_bounds (GTK_EDITABLE (entry),
					       &attr->start_index, &attr->end_index)) {
		char const *str = gtk_entry_get_text (GTK_ENTRY (entry));

		attr->start_index = g_utf8_offset_to_pointer (str, attr->start_index) - str;
		attr->end_index = g_utf8_offset_to_pointer (str, attr->end_index) - str;
		set_or_unset (wbcg->edit_line.full_content, attr,
			      wbcg->edit_line.cell_attrs);
		set_or_unset (wbcg->edit_line.markup, attr,
			      wbcg->edit_line.cell_attrs);
	}

	/* the format to use when inserting text, we will resize it later */
	attr->start_index = 0;
	attr->end_index = INT_MAX;
	set_or_unset (wbcg->edit_line.cur_fmt, attr,
		      wbcg->edit_line.cell_attrs);
	pango_attribute_destroy (attr);
	wbc_gtk_markup_changer (wbcg);
}

PangoLayout * VwGraphicsCairo::GetPangoLayoutHelper()
{
	if (m_fontMap == NULL)
		m_fontMap = pango_cairo_font_map_get_default();

	if (m_context == NULL)
	{	m_context = pango_context_new();
		pango_context_set_font_map(m_context, m_fontMap);
	}

	if (m_layout == NULL)
	{
		m_layout = pango_layout_new(m_context);

		PangoAttrList* list = pango_attr_list_new();
		PangoAttribute * fallbackAttrib = pango_attr_fallback_new(true);
		pango_attr_list_insert(list, fallbackAttrib);
		pango_layout_set_attributes(m_layout, list);
		pango_attr_list_unref(list);

		pango_layout_set_single_paragraph_mode(m_layout, true);
	}

	return m_layout;
}

// Helper function used in the implementation of ScriptItemize
HRESULT PangoItemize(const char * chars, int cInChars, int cMaxItems, SCRIPT_ITEM *pItems, int * pcItems)
{
	SCRIPT_CACHE context = NULL;

	PangoAttrList * attributes_list = pango_attr_list_new();
	GList * items = pango_itemize(GetPangoContext(&context), chars, 0, cInChars, attributes_list, NULL);

	*pcItems = g_list_length(items);

	if (*pcItems >= cMaxItems)
	{
		pango_attr_list_unref(attributes_list);
		g_list_free(items);
		return E_OUTOFMEMORY;
	}

	for(int i = 0; i < *pcItems; ++i)
	{
		PangoItem* item = static_cast<PangoItem*>(g_list_nth_data(items, i));
		pItems[i].iCharPos = item->offset;
		pItems[i].a.fRTL = item->analysis.level == 1;
		pItems[i].a.fLayoutRTL = pItems[i].a.fRTL;
		// TODO: set other fields in SCRIPT_ANALYSIS as needed.

		pango_item_free(item);
	}

	pango_attr_list_unref(attributes_list);
	g_list_free(items);

	return S_OK;
}

static void
nimf_gtk_im_context_get_preedit_string (GtkIMContext   *context,
                                        gchar         **str,
                                        PangoAttrList **attrs,
                                        gint           *cursor_pos)
{
  g_debug (G_STRLOC ": %s", G_STRFUNC);

  PangoAttribute *attr;

  nimf_im_get_preedit_string (NIMF_GTK_IM_CONTEXT (context)->im,
                              str, cursor_pos);

  if (attrs)
  {
    *attrs = pango_attr_list_new ();

    attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);

    if (str)
    {
      attr->start_index = 0;
      attr->end_index   = strlen (*str);
    }

    pango_attr_list_change (*attrs, attr);
  }
}

void iupgtkFontUpdatePangoLayout(Ihandle* ih, PangoLayout* layout)
{
  IgtkFont* gtkfont;
  PangoAttrList *attrs;

  if (!layout)
    return;

  gtkfont = gtkFontGet(ih);
  if (!gtkfont)
    return;

  attrs = pango_layout_get_attributes(layout);
  if (!attrs) 
  {
    attrs = pango_attr_list_new();
    pango_attr_list_insert(attrs, pango_attribute_copy(gtkfont->strikethrough));
    pango_attr_list_insert(attrs, pango_attribute_copy(gtkfont->underline));
    pango_layout_set_attributes(layout, attrs);
  }
  else
  {
    pango_attr_list_change(attrs, pango_attribute_copy(gtkfont->strikethrough));
    pango_attr_list_change(attrs, pango_attribute_copy(gtkfont->underline));
  }
}

PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
		const char *text, double scale, bool markup) {
	PangoLayout *layout = pango_cairo_create_layout(cairo);
	PangoAttrList *attrs;
	if (markup) {
		char *buf;
		GError *error = NULL;
		if (pango_parse_markup(text, -1, 0, &attrs, &buf, NULL, &error)) {
			pango_layout_set_text(layout, buf, -1);
			free(buf);
		} else {
			sway_log(SWAY_ERROR, "pango_parse_markup '%s' -> error %s", text,
					error->message);
			g_error_free(error);
			markup = false; // fallback to plain text
		}
	}
	if (!markup) {
		attrs = pango_attr_list_new();
		pango_layout_set_text(layout, text, -1);
	}

	pango_attr_list_insert(attrs, pango_attr_scale_new(scale));
	PangoFontDescription *desc = pango_font_description_from_string(font);
	pango_layout_set_font_description(layout, desc);
	pango_layout_set_single_paragraph_mode(layout, 1);
	pango_layout_set_attributes(layout, attrs);
	pango_attr_list_unref(attrs);
	pango_font_description_free(desc);
	return layout;
}

static void
gm_cell_renderer_bitext_update_style (GmCellRendererBitext* renderer,
				      GtkWidget* widget)
{
  GtkStyleContext *style = NULL;
  GtkStateFlags state;
  PangoAttrList *attr_list = NULL;
  PangoAttribute *attr_size = NULL;
  const PangoFontDescription* font = NULL;

  style = gtk_widget_get_style_context (widget);
  state = gtk_widget_get_state_flags (widget);

  attr_list = pango_attr_list_new ();

  /* we want the secondary text smaller */
  gtk_style_context_get (style, state,
			 "font", &font,
			 NULL);
  attr_size = pango_attr_size_new ((int) (pango_font_description_get_size (font) * 0.8));
  attr_size->start_index = strlen (renderer->priv->primary_text) + 1;
  attr_size->end_index = (guint) - 1;
  pango_attr_list_insert (attr_list, attr_size);

  g_object_set (renderer,
		"visible", TRUE,
		"weight", PANGO_WEIGHT_NORMAL,
		"attributes", attr_list,
		NULL);
  pango_attr_list_unref (attr_list);
}

void gnome_main_section_new_with_grid(const gchar *title, GtkWidget **frame, GtkWidget **grid)
{
    PangoAttrList *attrs = pango_attr_list_new();
    PangoAttribute *attr = pango_attr_weight_new(PANGO_WEIGHT_BOLD);
    attr->start_index = 0;
    attr->end_index = -1;
    pango_attr_list_insert(attrs, attr);

    *frame = gtk_frame_new(title);
    gtk_frame_set_shadow_type(GTK_FRAME(*frame), GTK_SHADOW_NONE);
    gtk_container_set_border_width(GTK_CONTAINER(*frame), 2);

    GtkWidget *label = gtk_frame_get_label_widget(GTK_FRAME(*frame));
    gtk_label_set_attributes(GTK_LABEL(label), attrs);
    pango_attr_list_unref(attrs);

    GtkWidget *align = gtk_alignment_new(0.08, 0.2, 0.1, 0.1);
    gtk_container_add(GTK_CONTAINER(*frame), align);

    *grid = gtk_grid_new();
    gtk_grid_set_row_spacing(GTK_GRID(*grid), 2);
    gtk_grid_set_column_spacing(GTK_GRID(*grid), 2);
    gtk_widget_show(*grid);
    gtk_container_add(GTK_CONTAINER(align), *grid);
}

void
CoordWinSetFont(const char *font)
{
#if GTK_CHECK_VERSION(3, 16, 0)
  if (NgraphApp.CoordWin.data.text && font) {
    set_widget_font(NgraphApp.CoordWin.data.text, font);
  }
#else  /* GTK_CHECK_VERSION(3, 16, 0) */
  const char *ptr;
  PangoAttrList *pattr;
  PangoFontDescription *desc;
  GtkLabel *label;

  label = GTK_LABEL(NgraphApp.CoordWin.data.text);

  if (label == NULL)
    return;

  pattr = gtk_label_get_attributes(label);
  if (pattr == NULL) {
    pattr = pango_attr_list_new();
    gtk_label_set_attributes(GTK_LABEL(label), pattr);
  }

  ptr = (font) ? font : "Monospace";

  desc = pango_font_description_from_string(ptr);
  pango_attr_list_change(pattr, pango_attr_font_desc_new(desc));
  pango_font_description_free(desc);
#endif
}

/* Set the colour of the "valid from" and "valid until" elements on the
 * Certificate page to red if they are incorrectly in the future or
 * past. */
static void show_date_state(char* label, void* data, int length) {
	gchar* labelname = g_strndup(label, strstr(label, ":") - label);
	GtkLabel* l = GTK_LABEL(gtk_builder_get_object(builder, labelname));
	PangoAttrList *attrs = pango_attr_list_new();
	PangoAttribute *attr;
	gboolean* is_invalid = (gboolean*)data;

	g_free(labelname);
	if(*is_invalid) {
		attr = pango_attr_foreground_new(G_MAXUINT16, 0, 0);
	} else {
#if HAVE_GTK == 3
		GdkRGBA color;
		GtkStyleContext *style = gtk_widget_get_style_context(GTK_WIDGET(l));

		gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
		attr = pango_attr_foreground_new(color.red * G_MAXUINT16, color.green * G_MAXUINT16, color.blue * G_MAXUINT16);
#else
#if HAVE_GTK == 2
		/* In GTK+ 2, there is no GtkStyleContext yet. It
		 * should, in theory, be possible to figure out what the
		 * default foreground color is by using a GTK+
		 * 2-specific API, but that's too much work and GTK+ 2
		 * is a minority now anyway, so... */
		attr = pango_attr_foreground_new(0, 0, 0);
#else
		/* The configure script only allows GTK+2 or GTK+3. */
#error should not happen
#endif
#endif
	}
	pango_attr_list_insert(attrs, attr);
	gtk_label_set_attributes(l, attrs);
}

TextAsset::Size
TextAsset::computeSizeOfText(cairo_t* cairoContext,
                             const std::string textString,
                             int bounds,
                             PangoFontDescription* font,
                             Rect* tight,
                             float* lineHeightOut)
{
    PangoLayout* layout = pango_cairo_create_layout(cairoContext);

    // Kerning
    PangoAttrList* attr_list = pango_attr_list_new();
    PangoAttribute* spacing_attr = pango_attr_letter_spacing_new(pango_units_from_double(_kern));
    pango_attr_list_insert(attr_list, spacing_attr);
    pango_layout_set_attributes(layout, attr_list);

    pango_cairo_context_set_resolution(pango_layout_get_context(layout), DISPLAY_RESOLUTION);
    pango_layout_set_text(layout, textString.c_str(), (int)textString.length());
    pango_layout_set_alignment(layout, _alignment);
    pango_layout_set_wrap(layout, PANGO_WRAP_WORD_CHAR);

    const Size maxTextureSize(bounds, 1024);
    pango_layout_set_width(layout, pango_units_from_double(maxTextureSize.width));
    pango_layout_set_height(layout, pango_units_from_double(maxTextureSize.height));
    pango_layout_set_font_description(layout, font);
    applyLeading(cairoContext, layout, font);

    PangoRectangle estimateSize;
    PangoRectangle ink;
    pango_layout_get_pixel_extents(layout, &ink, &estimateSize);

    // If the text is right or center aligned the offsets will contain all the
    // leading space.  We ignore that for the size because drawText will draw
    // in the larger box.  The tight box below will get the offsets so we know
    // where to draw so the text lands in the same tight box.
    Size res(estimateSize.width, estimateSize.height);

    if (tight != NULL) {
        float lineHeight;
        float xHeight = charHeight(cairoContext, font, 'x', &lineHeight);
        if (lineHeightOut != NULL) {
            *lineHeightOut = lineHeight;
        }
        const float capHeight = charHeight(cairoContext, font, 'Y');
        const float ascender = pango_units_to_double(pango_layout_get_baseline(layout));
        const float topSpace = ascender - capHeight;
        const float bottomSpace = MAX(lineHeight - ascender - (capHeight - xHeight), 0);
        if (res.height > topSpace + bottomSpace) {
            *tight = Rect(estimateSize.x,
                          estimateSize.y + topSpace,
                          res.width,
                          res.height - topSpace - bottomSpace);
        } else {
            *tight = Rect(0, 0, res.width, res.height);
        }
    }
    g_object_unref(layout);

    return res;
}

static void
update_fonts (UmEditableButton *button)
{
        PangoAttrList *attrs;
        PangoAttribute *attr;
        GtkWidget *label;

        UmEditableButtonPrivate *priv = button->priv;

        attrs = pango_attr_list_new ();
        if (priv->scale_set) {
                attr = pango_attr_scale_new (priv->scale);
                pango_attr_list_insert (attrs, attr);
        }
        if (priv->weight_set) {
                attr = pango_attr_weight_new (priv->weight);
                pango_attr_list_insert (attrs, attr);
        }

        gtk_label_set_attributes (priv->label, attrs);

        label = gtk_bin_get_child (GTK_BIN (priv->button));
        gtk_label_set_attributes (GTK_LABEL (label), attrs);

        pango_attr_list_unref (attrs);
}