From 9995ef583f0820013e4e870f572b794bd46b4b13 Mon Sep 17 00:00:00 2001 From: Michael Drake Date: Fri, 18 Jan 2013 23:32:53 +0000 Subject: Early scrollbar mouse handling. --- desktop/textarea.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 95 insertions(+), 7 deletions(-) (limited to 'desktop/textarea.c') diff --git a/desktop/textarea.c b/desktop/textarea.c index d3f031fe1..d10039a2f 100644 --- a/desktop/textarea.c +++ b/desktop/textarea.c @@ -48,6 +48,18 @@ struct line_info { unsigned int b_length; /**< Byte length of line */ }; +typedef enum textarea_drag_type_internal { + TEXTAREA_DRAG_NONE, + TEXTAREA_DRAG_SCROLLBAR, + TEXTAREA_DRAG_SELECTION +} textarea_drag_type_internal; +struct textarea_drag { + textarea_drag_type_internal type; + union { + struct scrollbar* scrollbar; + } data; +}; + struct textarea { int scroll_x, scroll_y; /**< scroll offsets for the textarea */ @@ -83,8 +95,8 @@ struct textarea { int caret_x; /**< cached X coordinate of the caret */ int caret_y; /**< cached Y coordinate of the caret */ - int sel_start; /**< Character index of sel start(inclusive) */ - int sel_end; /**< Character index of sel end(exclusive) */ + int sel_start; /**< Character index of sel start (inclusive) */ + int sel_end; /**< Character index of sel end (exclusive) */ int h_extent; /**< Width of content in px */ int v_extent; /**< Height of content in px */ @@ -96,9 +108,10 @@ struct textarea { /** Callback function for a redraw request */ textarea_redraw_request_callback redraw_request; - void *data; /** < Callback data for both callback functions */ + void *data; /**< Client data for callback */ - int drag_start_char; /**< Character index of drag start */ + int drag_start_char; /**< Character index of drag start */ + struct textarea_drag drag_info; /**< Drag information */ }; @@ -327,10 +340,16 @@ static void textarea_scrollbar_callback(void *client_data, ta->vis_width, ta->vis_height); break; + case SCROLLBAR_MSG_SCROLL_START: + ta->drag_info.type = TEXTAREA_DRAG_SCROLLBAR; + ta->drag_info.data.scrollbar = + scrollbar_data->scrollbar; /* TODO: Tell textarea client we're handling a drag */ break; + case SCROLLBAR_MSG_SCROLL_FINISHED: + ta->drag_info.type = TEXTAREA_DRAG_NONE; /* TODO: Tell textarea client drag finished */ break; } @@ -825,6 +844,7 @@ struct textarea *textarea_create(const textarea_setup *setup, ret->bar_x = NULL; ret->bar_y = NULL; ret->drag_start_char = 0; + ret->drag_info.type = TEXTAREA_DRAG_NONE; ret->text = malloc(64); @@ -1378,6 +1398,8 @@ bool textarea_keypress(struct textarea *ta, uint32_t key) size_t clipboard_chars; gui_get_clipboard(&clipboard, &clipboard_length); + if (clipboard == NULL) + return false; clipboard_chars = utf8_bounded_length(clipboard, clipboard_length); @@ -1673,9 +1695,51 @@ bool textarea_mouse_action(struct textarea *ta, browser_mouse_state mouse, int x, int y) { int c_start, c_end; + int sx, sy; /* xy coord offset for scrollbar */ + int sl; /* scrollbar length */ size_t b_off; unsigned int c_off; + if (ta->drag_info.type == TEXTAREA_DRAG_SCROLLBAR) { + if (ta->drag_info.data.scrollbar == ta->bar_x) { + x -= ta->border_width; + y -= ta->vis_height - ta->border_width - + SCROLLBAR_WIDTH; + } else { + x -= ta->vis_width - ta->border_width - + SCROLLBAR_WIDTH; + y -= ta->border_width; + } + scrollbar_mouse_action(ta->drag_info.data.scrollbar, + mouse, x, y); + return true; + } + + /* Horizontal scrollbar */ + if (ta->bar_x != NULL && ta->drag_info.type == TEXTAREA_DRAG_NONE) { + sx = x - ta->border_width; + sy = y - (ta->vis_height - ta->border_width - SCROLLBAR_WIDTH); + sl = ta->vis_width - 2 * ta->border_width - + (ta->bar_y != NULL ? SCROLLBAR_WIDTH : 0); + + if (sx >= 0 && sy >= 0 && sx < sl && sy < SCROLLBAR_WIDTH) { + scrollbar_mouse_action(ta->bar_x, mouse, sx, sy); + return true; + } + } + + /* Vertical scrollbar */ + if (ta->bar_y != NULL && ta->drag_info.type == TEXTAREA_DRAG_NONE) { + sx = x - (ta->vis_width - ta->border_width - SCROLLBAR_WIDTH); + sy = y - ta->border_width; + sl = ta->vis_height - 2 * ta->border_width; + + if (sx >= 0 && sy >= 0 && sx < SCROLLBAR_WIDTH && sy < sl) { + scrollbar_mouse_action(ta->bar_y, mouse, sx, sy); + return true; + } + } + /* mouse button pressed above the text area, move caret */ if (mouse & BROWSER_MOUSE_PRESS_1) { if (!(ta->flags & TEXTAREA_READONLY)) { @@ -1702,6 +1766,7 @@ bool textarea_mouse_action(struct textarea *ta, browser_mouse_state mouse, textarea_get_xy_offset(ta, x, y, &b_off, &c_off); c_start = ta->drag_start_char; c_end = c_off; + ta->drag_info.type = TEXTAREA_DRAG_SELECTION; return textarea_select(ta, c_start, c_end); } @@ -1717,9 +1782,32 @@ bool textarea_drag_end(struct textarea *ta, browser_mouse_state mouse, size_t b_off; unsigned int c_off; - textarea_get_xy_offset(ta, x, y, &b_off, &c_off); - c_end = c_off; - return textarea_select(ta, ta->drag_start_char, c_end); + switch (ta->drag_info.type) { + case TEXTAREA_DRAG_SCROLLBAR: + if (ta->drag_info.data.scrollbar == ta->bar_x) { + x -= ta->border_width; + y -= ta->vis_height - ta->border_width - + SCROLLBAR_WIDTH; + } else { + x -= ta->vis_width - ta->border_width - + SCROLLBAR_WIDTH; + y -= ta->border_width; + } + scrollbar_mouse_drag_end(ta->drag_info.data.scrollbar, + mouse, x, y); + return true; + + case TEXTAREA_DRAG_SELECTION: + textarea_get_xy_offset(ta, x, y, &b_off, &c_off); + c_end = c_off; + ta->drag_info.type = TEXTAREA_DRAG_NONE; + return textarea_select(ta, ta->drag_start_char, c_end); + + default: + break; + } + + return false; } -- cgit v1.2.3